Knick Stratos Multi E401N Operation & User’s Manual

Industrial Transmitters www.knick.de Read before installation. Keep for future use.

ii Supplemental Directives These supplemental directives explain how safety information is laid out in this document and what content it covers. Safety Chapter This document's safety chapter is designed to give the reader a basic understanding of safety. It illustrates general hazards and gives strategies on how to avoid them. Safety Guide The external safety guide is designed to give the reader a basic understanding of safety. It illustrates general hazards and gives strategies on how to avoid them. Warnings Stratos Multi E401 was subjected to a risk assessment. Nevertheless, not all risks can be sufficiently reduced. This document uses the following warnings to indicate hazardous situations: Symbol Category Meaning Remark WARNING Designates a situation that can lead to death or serious (irreversible) injury The warnings contain information on how to avoid the hazard. CAUTION Designates a situation that can lead to slight or moderate (reversible) injury Without NOTICE Designates a situation that can lead to property or environ- mental damage Additional Safety Information • Stratos Multi E401 safety guide Symbols Used in this Document Symbol Meaning Cross-reference to content within this document Interim or final results in instructions for action Item number in figure Item number in text

iii Table of Contents 1 Safety............................................................................................................................................. 8 1.1 Intended Use.......................................................................................................................................................... 8 1.2 Symbols and Markings on the Product........................................................................................................ 8 1.3 Personnel Requirements.................................................................................................................................... 8 1.4 Safety Training....................................................................................................................................................... 8 1.5 Installation and Commissioning..................................................................................................................... 9 1.6 Maintenance and Repair.................................................................................................................................... 10 1.7 Residual Risks......................................................................................................................................................... 10 2 Product.......................................................................................................................................... 11 2.1 Design and Function........................................................................................................................................... 11 2.2 Product Range and Options............................................................................................................................. 12 2.3 System Overview.................................................................................................................................................. 14 2.3.1 Typical Applications............................................................................................................................... 15 2.4 Package Contents and Product Identification........................................................................................... 17 2.4.1 Nameplate ................................................................................................................................................. 18 2.5 Symbols and Markings on the Display ......................................................................................................... 18 3 Commissioning............................................................................................................................. 20 3.1 Assembly ................................................................................................................................................................. 20 3.1.1 Dimension Drawings ............................................................................................................................. 21 3.1.2 Housing Mounting Options ................................................................................................................ 22 3.1.3 Pipe Mounting ZU0274......................................................................................................................... 23 3.1.4 Protective Hood for Wall and Pipe Mounting ZU0737 .............................................................. 24 3.1.5 Panel-Mount Kit ZU0738 ...................................................................................................................... 25 3.1.6 Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts.................................... 26 3.2 Electrical Installation........................................................................................................................................... 27 3.2.1 Relay Contacts: Protective Wiring ..................................................................................................... 27 3.2.2 Installing Active and Passive Current Outputs ............................................................................. 29 3.2.3 Terminal Assignments........................................................................................................................... 30 3.3 Sensor Connection............................................................................................................................................... 31 3.3.1 Connecting a Memosens Sensor/Optical Oxygen Sensor (LDO)........................................... 31 3.3.2 Connecting an Analog Sensor/Second Memosens Channel .................................................. 32 3.3.3 Cable Preparation for SE655/SE656.................................................................................................. 33 3.4 Terminal Assignments of Measuring Modules........................................................................................... 34 3.5 Final Check During Commissioning .............................................................................................................. 35 4 Operation and Use........................................................................................................................ 36 4.1 Changing the User Interface Language....................................................................................................... 36 4.2 Keypad and Display............................................................................................................................................. 36 4.3 Menu Structure Overview................................................................................................................................. 39 4.4 Access Control ....................................................................................................................................................... 39 4.5 Operating States................................................................................................................................................... 40 4.6 Measurement Display......................................................................................................................................... 40

iv 5 Parameter Setting ........................................................................................................................ 41 5.1 Operating Levels................................................................................................................................................... 41 5.2 Locking a Function............................................................................................................................................... 42 5.3 System Control...................................................................................................................................................... 43 5.3.1 Transfer Configuration .......................................................................................................................... 44 5.3.2 Parameter Sets ......................................................................................................................................... 45 5.3.3 Function Control...................................................................................................................................... 46 5.3.4 Calculation Blocks (TAN Option FW-E020)..................................................................................... 46 5.3.5 Time/Date .................................................................................................................................................. 46 5.3.6 Measuring Point Description.............................................................................................................. 46 5.3.7 Firmware Update (TAN Option FW-E106)....................................................................................... 46 5.3.8 Option Activation.................................................................................................................................... 47 5.3.9 Logbook ..................................................................................................................................................... 47 5.3.10 Measurement Recorder (TAN Option FW-E103) .......................................................................... 47 5.3.11 Buffer Table (TAN Option FW-E002).................................................................................................. 47 5.3.12 Concentration Table (TAN Option FW-E009)................................................................................. 48 5.3.13 Restore Factory Settings....................................................................................................................... 48 5.3.14 Passcode Entry......................................................................................................................................... 48 5.4 Parameter Setting, General............................................................................................................................... 48 5.4.1 Configuring the Measurement Display........................................................................................... 49 5.4.2 Display......................................................................................................................................................... 54 5.4.3 Measurement Recorder (TAN Option FW-E103) .......................................................................... 54 5.5 Inputs and Outputs.............................................................................................................................................. 54 5.5.1 Current Outputs....................................................................................................................................... 55 5.5.2 Relay Contacts.......................................................................................................................................... 57 5.5.3 PID Controller ........................................................................................................................................... 61 5.5.4 Control Inputs........................................................................................................................................... 62 5.6 Sensor Selection [I] [II] ........................................................................................................................................ 63 5.7 Process Variable pH ............................................................................................................................................. 64 5.7.1 Sensor Data ............................................................................................................................................... 66 5.7.2 Calibration Presettings.......................................................................................................................... 68 5.7.3 Temperature Compensation of Process Medium........................................................................ 69 5.7.4 Delta Function.......................................................................................................................................... 70 5.7.5 Messages.................................................................................................................................................... 71 5.8 Process Variable ORP........................................................................................................................................... 72 5.8.1 Sensor Data ............................................................................................................................................... 73 5.8.2 Calibration Presettings.......................................................................................................................... 74 5.8.3 Delta Function.......................................................................................................................................... 74 5.8.4 Messages.................................................................................................................................................... 75 5.9 Process Variable Conductivity (Contacting)................................................................................................ 76 5.9.1 Sensor Data ............................................................................................................................................... 77 5.9.2 Calibration Presettings.......................................................................................................................... 79 5.9.3 Temperature Compensation of Process Medium........................................................................ 80 5.9.4 Concentration (TAN Option FW-E009)............................................................................................. 80 5.9.5 USP Function ............................................................................................................................................ 81 5.9.6 Messages.................................................................................................................................................... 82 5.10 Process Variable Conductivity (Inductive)................................................................................................... 83 5.10.1 Sensor Data ............................................................................................................................................... 85 5.10.2 Calibration Presettings.......................................................................................................................... 86 5.10.3 Concentration (TAN Option FW-E009)............................................................................................. 87 5.10.4 USP Function ............................................................................................................................................ 87 5.10.5 Messages.................................................................................................................................................... 88

v 5.11 Dual Conductivity Measurement.................................................................................................................... 89 5.12 Process Variable Oxygen.................................................................................................................................... 89 5.12.1 Sensor Data ............................................................................................................................................... 92 5.12.2 Calibration Presettings.......................................................................................................................... 95 5.12.3 Pressure Correction................................................................................................................................ 95 5.12.4 Salinity Correction .................................................................................................................................. 96 5.12.5 Messages.................................................................................................................................................... 96 5.13 Flow........................................................................................................................................................................... 97 5.14 HART Communication (TAN Option FW-E050).......................................................................................... 97 6 Calibration/Adjustment............................................................................................................... 98 6.1 Memosens Calibration/Adjustment .............................................................................................................. 98 6.2 Process Variable pH Calibration/Adjustment............................................................................................. 99 6.2.1 Calibration Methods ..............................................................................................................................100 6.2.2 Temperature Compensation during Calibration .........................................................................101 6.2.3 Calibration/Adjustment Methods.....................................................................................................101 6.2.4 Calibration Mode: Calimatic................................................................................................................101 6.2.5 Calibration Mode: Manual....................................................................................................................103 6.2.6 Calibration Mode: Product...................................................................................................................104 6.2.7 Calibration Mode: Data Entry .............................................................................................................105 6.2.8 ISFET Zero Point Calibration Mode...................................................................................................105 6.2.9 Calibration Mode: Temperature.........................................................................................................106 6.3 Process Variable ORP Calibration/Adjustment ..........................................................................................107 6.3.1 Calibration Mode: ORP Data Entry....................................................................................................107 6.3.2 Calibration Mode: ORP Adjustment .................................................................................................107 6.3.3 Calibration Mode: ORP Check.............................................................................................................109 6.3.4 Calibration Mode: Temperature.........................................................................................................109 6.4 Process Variable Conductivity (Contacting) Calibration/Adjustment ...............................................110 6.4.1 Temperature Compensation during Calibration .........................................................................110 6.4.2 Calibration/Adjustment Methods.....................................................................................................111 6.4.3 Calibration Mode: Automatic..............................................................................................................111 6.4.4 Calibration Mode: Manual....................................................................................................................112 6.4.5 Calibration Mode: Product...................................................................................................................113 6.4.6 Calibration Mode: Data Entry .............................................................................................................114 6.4.7 Calibration Mode: Temperature.........................................................................................................114 6.5 Process Variable Conductivity (Inductive) Calibration/Adjustment ..................................................115 6.5.1 Temperature Compensation during Calibration .........................................................................115 6.5.2 Calibration/Adjustment Methods.....................................................................................................116 6.5.3 Calibration Mode: Automatic..............................................................................................................116 6.5.4 Calibration Mode: Manual....................................................................................................................117 6.5.5 Calibration Mode: Product...................................................................................................................118 6.5.6 Calibration Mode: Zero Point..............................................................................................................119 6.5.7 Calibration Mode: Installation Factor...............................................................................................119 6.5.8 Calibration Mode: Data Entry .............................................................................................................120 6.5.9 Calibration Mode: Temperature.........................................................................................................120 6.6 Process Variable Oxygen Calibration/Adjustment ...................................................................................121 6.6.1 Calibration/Adjustment Methods.....................................................................................................122 6.6.2 Calibration Mode: In Air........................................................................................................................122 6.6.3 Calibration Mode: In Water..................................................................................................................123 6.6.4 Calibration Mode: Data Entry .............................................................................................................124 6.6.5 Calibration Mode: Product...................................................................................................................125 6.6.6 Calibration Mode: Zero Point..............................................................................................................126 6.6.7 Calibration Mode: Temperature.........................................................................................................127

vi 7 Diagnostics ...................................................................................................................................128 7.1 Favorites Menu......................................................................................................................................................128 7.2 Diagnostic Functions ..........................................................................................................................................129 7.2.1 Overview of Diagnostic Functions....................................................................................................129 7.2.2 Messages....................................................................................................................................................129 7.2.3 Logbook .....................................................................................................................................................129 7.2.4 Device Information.................................................................................................................................130 7.2.5 Device Test.................................................................................................................................................131 7.2.6 Measuring Point Description..............................................................................................................131 7.2.7 Channel I/II Diagnostic Functions .....................................................................................................131 8 Maintenance .................................................................................................................................133 8.1 Overview of Maintenance Functions ............................................................................................................133 8.2 Channel I/II Maintenance Functions..............................................................................................................134 8.2.1 Sensor Monitor.........................................................................................................................................134 8.2.2 Maintenance Functions for Oxygen Sensors ................................................................................134 8.3 Manual Function Check .....................................................................................................................................134 8.3.1 Current Source .........................................................................................................................................134 8.3.2 Relay Test....................................................................................................................................................134 8.3.3 Controller Test ..........................................................................................................................................134 9 Decommissioning.........................................................................................................................135 9.1 Disposal....................................................................................................................................................................135 9.2 Returns.....................................................................................................................................................................135 10 Troubleshooting...........................................................................................................................136 10.1 Malfunction States...............................................................................................................................................136 10.2 Error Messages ......................................................................................................................................................137 10.3 Sensocheck and Sensoface...............................................................................................................................151 11 Accessories....................................................................................................................................153 11.1 Memory Card .........................................................................................................................................................153 12 Specifications................................................................................................................................155 12.1 Power........................................................................................................................................................................155 12.2 Inputs and Outputs (SELV, PELV).....................................................................................................................155 12.3 Device.......................................................................................................................................................................157 12.7 Interfaces.................................................................................................................................................................158 12.8 Measuring Functions...........................................................................................................................................159 12.8.1 pH .................................................................................................................................................................159 12.8.2 Cond.............................................................................................................................................................161 12.8.3 CondI ...........................................................................................................................................................162 12.8.4 Oxygen........................................................................................................................................................163 12.8.5 Temperature Compensation (Conductivity)..................................................................................165 12.8.6 Concentration Determination, Conductivity (TAN Option FW-E009)..................................165 12.9 Diagnostics and Statistics..................................................................................................................................166

vii 13 Annex ............................................................................................................................................167 13.1 Channel II Wiring Examples ..............................................................................................................................168 13.1.1 pH Analog Wiring Examples................................................................................................................168 13.1.2 ORP Analog Wiring Example...............................................................................................................174 13.1.3 Contacting Conductivity Wiring Examples....................................................................................175 13.1.4 Inductive Conductivity Wiring Examples .......................................................................................182 13.1.5 Dual Conductivity Wiring Examples.................................................................................................184 13.1.6 Oxygen Wiring Examples .....................................................................................................................187 13.2 Buffer Tables...........................................................................................................................................................189 13.3 Calibration Solutions...........................................................................................................................................197 13.4 TAN Options ...........................................................................................................................................................199 13.4.1 pH Buffer Table: Entry of Individual Buffer Set (FW-E002)........................................................199 13.4.2 Current Characteristic (FW-E006) ......................................................................................................201 13.4.3 Concentration Determination (FW-E009).......................................................................................201 13.4.4 Calculation Blocks (FW-E020)..............................................................................................................206 13.4.5 HART (FW-E050).......................................................................................................................................209 13.4.6 Parameter Sets 1-5 (FW-E102) ............................................................................................................210 13.4.7 Measurement Recorder (FW-E103)...................................................................................................211 13.4.8 Firmware Update (FW-E106) ...............................................................................................................213 14 Basics.............................................................................................................................................215 14.1 Basics of PID Control............................................................................................................................................215 Index..............................................................................................................................................217

8 1 Safety The following safety instructions contain the necessary information for the safe use of the product. If you have any questions, please contact Knick Elektronische Messgeräte GmbH & Co. KG using the information provided on the back page of this document. 1.1 Intended Use Stratos Multi is an industrial transmitter in 4-wire technology. In the field of liquid analysis, it can measure pH values, ORP, conductivity (contacting and inductive), and oxygen content both dissolved and in the gaseous phase. Alongside a permanently installed measuring channel I for Memosens sensors, the modular transmitter has a slot that can be equipped with any analog or digital measuring module (measuring channel II). The transmitter can be extended with device-specific add-on functions called TAN options. The defined rated operating conditions must be observed when using this product. These conditions are set out in full in the Specifications chapter of the user manual as well as in parts in the installation guide for the Stratos Multi. Using the product improperly or for any purpose other than the product's intended purpose is not permitted and may result in injury to persons or damage to objects or the environment. 1.2 Symbols and Markings on the Product Attaching the CE marking to the product means that the product satisfies the applicable requirements specified in the European Union harmonization legislation. Special conditions and the product’s possible danger points. Read the user manual, observe the specifications, and follow the instructions in the safety guide. Reminder to read the documentation Protection class II 1.3 Personnel Requirements The operating company must ensure that personnel are sufficiently qualified in accordance with the local and national codes and regulations that apply for the area in which the product is being used. The personnel must be authorized by the operating company and instructed in handling this product. Personnel Jobs in the process industry Technicians Operation of machines and plants, failure elimination Electricians Installation, systematic troubleshooting and maintenance of machines and plants System specialists Setup and commissioning, parameter setting, calibration, and adjustment on the administrator level of the Stratos Multi. 1.4 Safety Training Upon request, Knick Elektronische Messgeräte GmbH & Co. KG will provide safety instruction and product training during initial commissioning of the product. Further information is available from the relevant Knick representatives.

9 1.5 Installation and Commissioning Observe all applicable local and national codes and standards for the installation of electrical equipment. Information on installation is provided in the installation guide for the Stratos Multi. Cable Only use cables with a suitable temperature resistance. Transmitter Cable temperature resistance Stratos Multi E401N 75 °C / 167 °F or higher Mains Connection The transmitter does not have a power switch. An appropriately arranged and accessible disconnect- ing device for the transmitter must be present in the system installation. The disconnecting device must disconnect all non-grounded, current-carrying wires. The disconnecting device must be labeled in a way that enables the associated transmitter to be identified. The power line may carry dangerous touch voltages. Touch protection must be ensured by proper installation. Inputs and Outputs (SELV, PELV) All inputs and outputs must be connected to SELV/PELV circuits. Parameter Setting, Calibration, and Adjustment Incorrect parameter setting, calibration, and adjustment can result in incorrect outputs. For this reason, Stratos Multi must be commissioned by a specialist, who will also set the parameters, calibrate and adjust the transmitter. Relay Contacts Make sure that the maximum ratings of the relay contacts are not exceeded even during switching. Relay contacts are subject to electrical erosion. Especially with inductive and capacitive loads, the service life of the relay contacts will be reduced. Degree of Protection The housing of the device is dust-tight and offers complete protection against contact as well as protection against strong water jets. • Europe: IP protection IP66/IP67 • USA: NEMA 4X Outdoor (with pressure compensation) Memory Card Dangerous touch voltage may be present in the terminal compartment when the device is opened. Professional installation guarantees direct contact protection. The memory card can be replaced during operation. When doing so, maintain sufficient distance from the power lines and do not use tools.

10 1.6 Maintenance and Repair Maintenance Maintenance work on the Stratos Multi and the sensors is only permitted in the function check (HOLD) mode, since otherwise there is a risk of unexpected system behavior. The function check (HOLD) mode is activated on the device during: • Calibration (the selected channel only) • Maintenance (current source, measuring points) • Parameter setting on the operator and administrator levels Repair The Stratos Multi and measuring module cannot be repaired by the user. To request a repair, please contact Knick Elektronische Messgeräte GmbH & Co. KG by visiting www.knick.de. 1.7 Residual Risks The product has been developed and manufactured in accordance with generally accepted safety rules and regulations. However, it is not possible to rule out all risks. The effects of moisture, ambient temperature, chemicals, and corrosion can negatively impact the safe operation of the product. Please observe the following instructions: Knick Elektronische Messgeräte GmbH & Co. KG recommends that the Stratos Multi E401 is installed in a weather-proofed area of the plant or that a cover is used for protection against the weather.

11 2 Product 2.1 Design and Function Stratos Multi is designed as follows: • The 1- and 2-channel transmitter permits a free combination of the pH/ORP process variables, conductivity (2-/4-electrode sensors, toroidal sensors), and oxygen, and can, for example, simultaneously measure pH values and conductivity. • The device has four current outputs (active/passive). • Add-on product options can be enabled by entering a transaction number (TAN). • The color TFT display has white backlighting and provides clear information on errors during parameter setting or measurement in accordance with NAMUR recommendations. • The user interface is multi-lingual with full-text menu navigation presently available in the following languages: German, English, French, Italian, Spanish, Portuguese, and Chinese. Function TAN option 1 measuring channel 2 current outputs Second measuring channel via add-on measuring module 3rd and 4th current outputs X Multiparameter: Process variables freely selectable from pH, ORP, oxygen, conductivity (contacting/inductive) Door contact HART X 3 freely assignable relay contacts for NAMUR messages (failure, maintenance required, out of specification, function check), setpoint alarm relay, controller, rinse contact parameter set, USP (for conductivity), Sensoface Function check input (HOLD) 2 control Inputs Flow measurement Current Input X

12 2.2 Product Range and Options Version Possible combinations 1-channel (basic unit) 1x Memosens sensor 1x SE740 optical oxygen sensor 1x analog sensor via measuring module (MK module) 2-channel 2x Memosens sensors (1x via MK module) 1x Memosens sensor (MK module) and 1x SE740 optical oxygen sensor 1x Memosens sensor and 1x analog sensor via measuring module (MK module) 1x CC measuring module for dual conductivity measurement The transmitters have the designations E401N for safe areas. Product Line Device (digital basic unit) Order No. Stratos E401N E401N Measuring module for analog sensors or 2-channel Memosens, non-intrinsically safe Order No. pH value, ORP measurement MK-PH015N Oxygen measurement MK-OXY046N Contacting conductivity measurement (process-wetted) MK-COND025N Toroidal conductivity measurement MK-CONDI035N Dual conductivity measurement MK-CC065N Memosens multiparameter (for 2-channel version) MK-MS095N The following add-on functions (TAN options) can be enabled by entering a TAN: Add-on function (TAN option) Order No. pH buffer table: Entry of individual buffer set FW-E002 Current characteristic FW-E006 Concentration determination for use with conductivity sensors FW-E009 Oxygen measurement in low oxygen concentrations FW-E015 Operation with double high-impedance pH sensors FW-E017 Calculation blocks FW-E020 HART FW-E050 Current input FW-E051 Current outputs 3 and 4 FW-E052 Parameter sets 1 to 5 FW-E102 Measurement recorder FW-E103 Logbook, in conjunction with Data Card FW-E104 Firmware update FW-E106 Mounting accessories Order No. Pipe-mount kit ZU 0274 Panel-mount kit ZU 0738 Protective hood ZU 0737 M12 socket for sensor connection with Memosens cable/M12 connector ZU 0860

13 Operation with Analog Sensors To enable operation with analog sensors, analog measuring modules are plugged in and must be configured during initial start-up. Operation with Optical Sensors The SE740 digital optical oxygen sensor can be directly connected to Stratos Multi. Parameter Sets Two complete parameter sets (A, B) can be stored in the device. The control element for switching between the parameter sets (optocoupler input OK1, softkey) is selected in the system control. The currently activated set can be signaled by a relay contact. Power Supply Current is provided through a universal mains supply 80 ... 230 V AC, 45 ... 65 Hz/24 ... 60 V DC. HART Data Transmission Device identification, measured values, statuses and messages, calibration data, configurations of the current loop, and HART variables are transmitted using HART communication.➜HART (FW-E050), p. 209

14 2.3 System Overview 1 2 3 4 5 6 7 8 9 10 Stratos Multi E401N 1 Input for Memosens sensors or SE740 optical oxygen sensor 6 Current output 1: 0/4 … 20 mA/HART active or passive (TAN option FW-E050 HART: 4 … 20 mA) 2 Power output 3/15/24 V for SE740 optical oxygen sensor or external transmitter 7 Current outputs 2/3/4: Active or passive (current outputs 3 and 4: TAN option FW-E052) 3 Port for an analog MK module or Memosens via MK-MS module 8 Relay contact K1: Messages, limits, rinse contact, ... 4 Optocoupler inputs OK1/OK2 OK1: Parameter set selection A/B, flow, … OK2: Function check (HOLD) 9 Relay contacts 2/3: Controller or messages, limits, rinse contacts, ... 5 Current input 0/4 … 20 mA for external pressure transmitter (TAN option FW-E051) 10 Power input: 80 … 230 V AC/24 … 60 V DC < 15 VA/10 W

15 2.3.1 Typical Applications Memosens pH Measurement and PID Control 24 V AC/DC MS pH Stratos Multi E401N Alarm Acid Brine PID control Alarm Acid Brine

16 Memosens Oxygen Measurement and Pressure Correction with External Pressure Transmitter (with TAN Option FW-E051 “Current Input”) MS Oxy e.g. + 24 V Pressure Transmitter Stratos Multi E401N

17 2.4 Package Contents and Product Identification • Basic device Stratos Multi • Bag containing small accessory parts (2x plastic closure, 1x hinge pin, 1x washer, 2x insertable jumper, 1x reduction sealing insert, 1x multiple sealing insert, 2x blanking plug, 5x cable gland and hex nut M20x1.5) • Test Report acc. to EN 10204 • Installation Guide • Safety Guide Note: Check all components for damage upon receipt. Do not use damaged parts. Measuring modules are not included in the basic unit’s package contents. 4 5 6 7 8 9 10 2 3 1 11 12 13 1 Front unit 8 Housing screw (4x) 2 Rear unit 9 Reduction sealing insert (1x) 3 Holes for cable glands 10 Multiple sealing insert (1x) 4 Plastic sealing plug (2x), for sealing in case of wall mounting 11 Blanking plugs (2x) 5 Hinge pin (1x), insertable from either side 12 Cable gland (5x) 6 Washer (1x), for conduit mounting: Place washer between housing and nut 13 Hex nut (5x) 7 Insertable jumper (2x)

18 2.4.1 Nameplate 1 3 7 6 8 2 4 9 10 11 5 1 Name of manufacturer 6 Protection class II 2 Product name 7 Power supply 3 CE marking 8 Manufacturer’s address with barcode 4 Special conditions: Read the user man- ual, observe the specifications, and fol- low the instructions in the safety guide. 9 Permissible ambient temperature, protection class 10 Product number/Serial number/Production year and week 5 Reminder to read the documentation 11 Model designation You can view the device type, serial number, and firmware, hardware, and bootloader versions of your device in the Diagnostics menu: Menu  Diagnostics  Device Information ➜Device Information, p. 130 2.5 Symbols and Markings on the Display Function check in accordance with NAMUR NE 107 Wrench symbol on orange background The NAMUR “HOLD” contact is active. Current outputs as configured: Currently measured value: The currently measured value appears at the current output. Last measured value: The last measured value is held at the current output. Fixed value: The current output supplies a fixed value. Out of specification in accordance with NAMUR NE 107 Black question mark on yellow background The NAMUR “Out of Specification” contact is active. Error message: Diagnostics Message List Failure in accordance with NAMUR NE 107 Flashing black cross symbol on red background The NAMUR “Failure” contact is active. Error message: Diagnostics Message List Maintenance required in accordance with NAMUR NE 107 Oil can symbol on blue background The NAMUR “Maintenance Required” contact is active. Error message: Diagnostics Message List The device is in calibration mode. Function check (HOLD) is active. The device is in maintenance mode. Function check (HOLD) is active. The device is in parameter setting mode. Function check (HOLD) is active. The device is in diagnostics mode.

19 Selectable parameter sets (A/B). Indicates which parameter set is currently active when a control element for parameter set selection was selected: Parameter Setting System Control Function Control A “closed” Data Card (memory card) is located in the device. The memory card can be removed. If you want to continue using the card, select “Open Memory Card” in the Maintenance menu. There is an enabled Data Card (memory card) in the device. Note: Select “Close Memory Card” in the Maintenance menu before removing the memory card. There is an FW Update Card (memory card) in the device. You can save the current device firmware or perform a firmware update from the memory card Note: Check the parameter settings after updating. Free firmware repair in the event of device errors. The TAN option FW-E106 is not required here. General data cannot be stored on this card. I II Designates the measuring channel for clear assignment of measured-value/parameter displays in the case of identical process variables. Channel I: Memosens sensor/SE740 optical oxygen sensor (LDO) Channel II: Measuring module for analog sensor or second Memosens sensor IIA IIB Channel IIA: First channel in MK-CC module Channel IIB: Second channel in MK-CC module CI CII Channel CI: Calculation block 1 Channel CII: Calculation block 2 To the left of a menu line that contains a further menu level. Pressing Enter opens the submenu. To the left of a menu line that, at administrator level, can be blocked from access at operator level. To the left of a menu line that, at administrator level, was blocked from access at operator level. When in measuring mode, Sensoface smileys indicate the quality of the sensor data: Happy Neutral Sad Wait; device is busy. To the left of a Diagnostics menu item set as a “Favorite”.

20 3 Commissioning 3.1 Assembly Note: Use only a suitable Phillips head screwdriver to open the housing. Do not use sharp or pointed objects. 1 2 4 3 5 6 6 Assembling the Housing 01. Install the cable glands (5) from the bag containing small accessory parts in the rear unit. As required, insert sealing plugs (3) in the event of wall mounting. ➜Package Contents and Product Identification, p. 17 02. Insert blanking plugs in unused cable glands (4). ➜Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts, p. 26 03. Push in the hinge pin (5) to connect the front unit (1) and rear unit (2). 04. Tighten the captive enclosure screws (6) on the front of the front unit (1) in diagonal sequence using a Phillips head screwdriver. 05. Select mounting type and install. ✓Pipe mounting ➜Pipe Mounting ZU0274, p. 23 ✓Panel mounting ➜Panel-Mount Kit ZU0738, p. 25 ✓Protective hood ➜Protective Hood for Wall and Pipe Mounting ZU0737, p. 24

21 3.1.1 Dimension Drawings Note: All dimensions are given in millimeters [inches]. 80 [3.15] 34 [1.34] 74 [2.91] 121,4 [4.78] 106,4 [4.19] 90 [3.54] 90 [3.54] 131 [5.16] 20,3 [0.80] 29 [1.14] 36 [1.42] 137,6 [5.42] 42 [1.65] 42 [1.65] 22 [0.87] 148 [5.83] 148 [5.83] 115,5 [4.55] 39,5 [1.56] 8,5 [0.33] 29 [1.14] 3 1 2 CAUTION! Ensure the suitable IP protection. IP66/IP67 is only achieved with correctly installed cable glands. Front View Rear View Bottom View Side View 4 1 Holes for pipe mounting, 4x 3 Holes for cable glands or ½” conduit, ø 21.5 mm, 2x 2 Holes for wall mounting, 2x Sealing with plastic sealing plugs 4 Cable glands, 5x See also ➜Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts, p. 26

22 3.1.2 Housing Mounting Options Note: All dimensions are given in millimeters [inches]. Knockouts in the rear unit enable different mounting options: • Pipe mounting ➜Pipe Mounting ZU0274, p. 23 • Panel mounting ➜Panel-Mount Kit ZU0738, p. 25 • Protective hood ➜Protective Hood for Wall and Pipe Mounting ZU0737, p. 24 Cable glands for connecting sensors: • 3 knockouts for M20x1.5 cable glands ➜Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts, p. 26 • 2 knockouts for NPT 1/2″ or rigid metallic conduit Installing Multiple Devices Note: Install the hinge pin to prevent tensile strain on the measuring cables when replacing the front unit. Imprecise measuring values may result if this is not done. 110 [4.33071] There is a 100 mm hinge pin in the bag containing small accessory parts included in the package con- tents ➜Package Contents and Product Identification, p. 17. The hinge pin connects the front and rear units. For installation of multiple Stratos Multi devices, a minimum clearance of 110 mm [4.331 inches] must be maintained to ensure that the middle front units can still be replaced.

23 3.1.3 Pipe Mounting ZU0274 Note: All dimensions are given in millimeters [inches]. Ø 40 … 60 mm, □ 30 … 45 mm 40 [1.57] ... 60 [2.36] 1 2 1 2 3 3 4 4 1 For vertical or horizontal posts or pipes 3 Hose clamp with worm gear drive according to DIN 3017, 2x 2 Pipe-mount plate, 1x 4 Self-tapping screw, 4x

24 3.1.4 Protective Hood for Wall and Pipe Mounting ZU0737 Note: All dimensions are given in millimeters [inches]. 146,9 [5.78] 189,9 [7.48] 54 [2.13] 74,2 72 [2.83] The protective hood can only be used for wall or pipe mounting. The package contents includes 4 M6 nuts for fastening the protective hood on the threaded rod of the pipe-mount kit.

25 3.1.5 Panel-Mount Kit ZU0738 Note: All dimensions are given in millimeters [inches]. Cutout 138 mm x 138 mm (DIN 43700) 22 [0.866] 1 [0.039] ... 138 [5.433]  76 [2.992] 30 [1.181] < 41 [1.614] 1 2 3 4 5 1 Position of panel 4 Span piece, 4x 2 Circumferential seal, 1x 5 Threaded sleeve, 4x 3 Screw 60.0 x 4.0 mm, 4x

26 3.1.6 Blanking Plugs, Reduction Sealing Inserts, Multiple Sealing Inserts As delivered, each cable gland includes a standard sealing insert. Reduction and multiple sealing in- serts are available for tight insertion of one or two thinner cables. The coupling can be tightly sealed using a blanking plug. Handling is as shown below. Cable gland WITH standard sealing insert To use the multiple sealing insert, remove the standard sealing insert. Cable gland WITHOUT standard sealing instert 24 A/F 24 A/F Blanking plug Reduction sealing insert Multiple sealing insert (orientation as shown) Blanking plugs and reduction sealing inserts are inserted into the cable gland WITH standard sealing instert. The multiple sealing insert is inserted into the cable gland WITHOUT standard sealing insert. Using blanking plugs and reduction sealing insert Using a multiple sealing insert Insert the cable into the cable gland and fasten with a coupling nut. CAUTION! Ensure the suitable IP protection. IP66/IP67 can only be achieved with correctly in- stalled cable glands and screwed housing. Observe the cable diameters and tightening torques. Only use original accessories and spare parts.

27 3.2 Electrical Installation WARNING! The transmitter does not have a power switch. An appropriately arranged and acces- sible disconnecting device for the transmitter must be present in the system installation. The discon- necting device must disconnect all non-grounded, current-carrying wires and be labeled such that the associated transmitter can be identified. Before commencing with the installation, make sure that all lines to be connected are de-energized. CAUTION! Ensure the suitable IP protection. IP66/IP67 can only be achieved with correctly installed cable glands and screwed housing. Observe the cable diameters and tightening torques. Only use original accessories and spare parts. Note: Strip the insulation from the wires using a suitable tool to prevent damage. Only use cables that are rated for use at 75 °C / 167 °F or higher. 01. Wire the current outputs. Deactivate unused current outputs in the parameter settings or use jumpers. 02. Wire the relay contacts and inputs if necessary. 03. Connect the power supply (for ratings, see specifications). 04. When measuring with analog sensors: Insert the measuring module into the module slot. 05. Connect the sensor. 06. Check whether all connections are correctly wired. 07. Before switching on the power supply, make sure its voltage is within the specified range. 08. Switch on the power supply. CAUTION! Incorrect parameter settings, calibration, and adjustments can result in incorrect outputs. For this reason, Stratos Multi must be commissioned by a specialist, who will also set the parameters, calibrate and adjust the device. See also ➜Channel II Wiring Examples, p. 168 ➜Package Contents and Product Identification, p. 17 3.2.1 Relay Contacts: Protective Wiring Relay contacts are subject to electrical erosion. Especially with inductive and capacitive loads, the service life of the contacts will be reduced. For suppression of sparks and arcing, components such as RC combinations, nonlinear resistors, series resistors, and diodes should be used. NOTICE! Make sure that the maximum ratings of the relay contacts are not exceeded, even during switching. ➜Power, p. 155 Information Concerning Relay Contacts As delivered, the relay contacts are suitable for low signal currents (down to approx. 1 mA). If currents above approx. 100 mA are switched, the gold plating is destroyed during the switching process. After that, the contacts will not reliably switch low currents. Configuration of relay contacts ➜Relay Contacts, p. 57 Wiring of relay contacts ➜Terminal Assignments, p. 30

28 Typical AC Application with Inductive Load 1 2 3 1 2 3 1 Load 3 Contact 2 Typical RC combination, e.g., capacitor 0.1 μF, resistor 100 Ω/1 W Typical DC Application with Inductive Load 1 2 3 1 Inductive load 3 Contact 2 Free-wheeling diode, e.g.,1N4007 (observe polarity) Typical AC/DC Application with Capacitive Load 1 2 3 1 Capacitive load 3 Contact 2 Resistor e.g., 8 Ω/1 W at 24 V/0.3 A

29 3.2.2 Installing Active and Passive Current Outputs The current outputs directly supply current (0/4 ... 20 mA) to a load according to the selected process variable. Passive current outputs require an external supply voltage. Note: Observe the specifications and connected loads. Terminal Assignment Diagram Active current outputs Passive current outputs 19

30 3.2.3 Terminal Assignments The terminals are suitable for single or stranded wires up to 2.5 mm2. Terminal Connection Sensor (Memosens or other digital sensors) 1 3 V BN = brown cable 2 RS485 A GN = green cable 3 RS485 B YE = yellow cable 4 GND WH = white cable 5 Shield CL = transparent cable 6 Power Out Power supply output to supply power to special sensors or external transmitters Card Memory card Current inputs 0/4 mA … 20 mA 7 + I-Input 8 - I-Input Digital control inputs Optocoupler inputs 9 OK2 10 OK2 11 OK1 12 OK1 Relay contacts REL 2, REL 3 13 Relay 3 For contact ratings, see ➜Specifications, p. 155 14 Relays 2/3 15 Relay 2 16 N.C. No connection Power supply 24 V to 230 V AC/DC 17 Power Power supply input 18 Power Power supply input Current outputs Out 1/2/3/4 (0)4 mA … 20 mA Active Passive 19 N.C., no connection + Out 1 for HART 20 + Out 1 for HART - Out 1 for HART 21 - Out 1 for HART N.C., no connection 22 N.C., no connection + Out 2/3/4 23 + Out 2 - Out 2 24 - Out 2 N.C., no connection 25 + Out 3 - Out 3 26 - Out 3 N.C., no connection 27 + Out 4 - Out 4 28 - Out 4 N.C., no connection Relay contact REL 1 29 Relay 1 For contact ratings, see ➜Specifications, p. 155 30 Relay 1 For connection of analog sensors: Insert measuring module. See also ➜Power, p. 155

31 3.3 Sensor Connection 3.3.1 Connecting a Memosens Sensor/Optical Oxygen Sensor (LDO) Top view of terminals for Memosens/LDO sensor. The figure shows the opened device, rear side of the front unit. 1 2 3 1 Standard sensor connection for digital sensors (Memosens sensor/LDO SE740 sensor) 2 Terminal plate with terminal assignments for digital sensor 3 Sensor connection for analog sensors or second Memosens sensor via measuring module Note: The terminals are suitable for single or stranded wires up to 2.5mm2. Memosens sensor SE 740 optical oxygen sensor (LDO) Terminal Wire color Wiring Memosens cable Terminal Wire color Wiring M12 cable 1 Brown (BN) +3V 1 - 2 Green (GN) RS-485 A 2 Gray RS-485 A 3 Yellow (YE) RS-485 B 3 Pink RS-485 B 4 White (WH) GND 4 Brown Shield 5 Transparent (CL) Shield 5 - - 6 6 White Power Out 01. Using an appropriate sensor cable, connect a Memosens sensor or the SE740 optical oxygen sensor (LDO) to the RS-485 interface (2) of the Stratos Multi. 02. Then select a measuring function and configure the sensor: From within measuring mode, press the left softkey: Menu. ✓The Menu selection opens. 03. Select Parameter Setting Sensor Selection [I] [II] . Note: Function check (HOLD) is active. 04. Press enter to open the Sensor Selection [I] . 05. Select process variable, mode, and functionality, and confirm with enter. Set further parameters with the left softkey: Back. 06. Return to measuring mode to exit parameter setting, e.g., with the right softkey: Back to Meas.

32 3.3.2 Connecting an Analog Sensor/Second Memosens Channel CAUTION! Electrostatic discharge (ESD). The modules' signal inputs are sensitive to electrostatic discharge. Take measures to protect against ESD before inserting the module and wiring the inputs. Note: Strip the insulation from the wires using a suitable tool to prevent damage. Only use cables that are rated for use at 75 °C / 167 °F or higher. Measuring Modules for Connection of Analog Sensors: pH, ORP, Oxygen, Conductivity ➜Terminal Assignments of Measuring Modules, p. 34 1 2 3 4 01. Switch off the power supply to the device. 02. Open the device (loosen the 4 screws on the front). 03. Loosen screw (1) on the module cover (2) (“ESD shield”) and open the cover. 04. Insert the module into the module slot (3). 05. Attach the module plate sticker (4). 06. Connect the sensor and separate temperature probe, if necessary; see Wiring Examples. NOTICE! Moisture ingress. The cable glands must be tightly sealed. Insert blanking plugs or sealing inserts if necessary. 07. Check whether all connections are correctly wired. 08. Close the module cover (2), tighten screw (1). 09. Close the device by tightening the screws on the front. 10. Switch on the power supply. 11. Then select a measuring function and configure the sensor: From within measuring mode, press the left softkey: Menu. ✓The Menu selection opens. 12. Select Parameter Setting Sensor Selection [I] [II] . Sensor Selection Sensor Selection Back Sensor Selection Lock Power Out Off I II (Admin.) I II Note: Function check (HOLD) is active. 13. Press enter to open the Sensor Selection [II] . 14. Select the module and mode, and confirm with enter. Set further parameters with the left softkey: Back. 15. Return to measuring mode to exit parameter setting, e.g., with the right softkey: Back to Meas.

33 Measuring Module for Connection of a Second Memosens Sensor If you want to measure two process variables using Memosens sensors, you must insert an MK-MS095N Memosens module for the second channel. 01. Insert a Memosens module in the module slot and connect it up (see above). 02. Then select a measuring function and configure the sensor: From within measuring mode, press the left softkey: Menu. ✓The Menu selection opens. 03. Select Parameter Setting Sensor Selection [I] [II] . Note: Function check (HOLD) is active. 04. Press enter to open the Sensor Selection [II] . 05. Select module MK-MS. 06. Select process variable, mode, and functionality, and confirm with enter. Set further parameters with the left softkey: Back. 07. Return to measuring mode to exit parameter setting, e.g., with the right softkey: Back to Meas. 3.3.3 Cable Preparation for SE655/SE656 Preparing the Shield Connection for Toroidal Conductivity Sensors 3 5 4 2 1 01. Insert the special cable through the cable entry into the terminal compartment. 02. Remove the previously separated part of the cable insulation (1). 03. Turn the shielding mesh (2) over the cable insulation (1) (3). 04. Then guide the crimp ring (4) over the shielding mesh (5) and tighten it using pliers. Special Cable Wire Assignment 01. Connect the sensors to the measuring device. RTD (temp) Coax red send lo Coax white send hi receive hi blue receive lo sense (temp) blue red green red white yellow green RTD (temp) shield

34 3.4 Terminal Assignments of Measuring Modules Installation of the measuring modules ➜Connecting an Analog Sensor/Second Memosens Channel, p. 32 The module plate (1) is attached to the measuring module underneath the module cover on the rear of the device. 1 pH/ORP Measuring Module Order code MK-PH015N Oxygen Measuring Module Order code MK-OXY046N Module for Contacting Conductivity Measurement Order code MK-COND025N A B C D E F G H I K COND Sensor Temp RTD (GND) RTD (SENSE) RTD SHIELD Module for Inductive Conductivity Measurement Order code MK-CONDI035N

35 Module for Dual Conductivity Measurement Order code MK-CC065N Memosens Module Order code MK-MS095N 3.5 Final Check During Commissioning Only commission the Stratos Multi if all the questions below can be answered “yes”: • Are the Stratos Multi and all its cables externally intact and strain-relieved? • Are the cables routed without any loops or crossovers? • Have all the wires been correctly connected in accordance with their terminal assignments? • Was the tightening torque of the screw terminals correctly adhered to? • Are all connectors firmly engaged? • Are all cable glands installed, tight, and leak-proof? • Is the device closed and correctly screwed together? • Does the supply voltage (power supply) accord with the voltage indicated on the nameplate?

36 4 Operation and Use 4.1 Changing the User Interface Language Preconditions • Stratos Multi is connected to the power. Measuring mode is shown on the display. Steps 01. Press the Left softkey: Menu. The menu selection opens. 02. Press the Right softkey: Lingua. Press the right arrow key and set the language of the user inter- face. 03. Confirm with enter. Note: The user interface language can also be changed in the Parameter Setting menu. Parameter Setting General Language ➜Parameter Setting, General, p. 48 4.2 Keypad and Display Display Stratos Multi features a 4.3'' TFT color graphic display. The Calibration, Maintenance, Parameter Set- ting, and Diagnostics menus each have their own colors. The device is operated using plain text in var- ious languages. Messages are output as icons and plain text. Menu Selection Back Maintenance Lingua 1 2 3 4 5 6 1 Calibration 4 Diagnostics 2 Maintenance (selected) 5 Softkey function: Selecting the language 3 Parameter Setting 6 Softkey function display

37 Sensor Monitoring Details (Admin.) Zero Point Back 2 7 8 9 Slope ORP Offset Sensocheck Ref El Sensocheck Glass El Response Time 1 3 4 Back to Meas. I 6 5 10 11 1 Function check (HOLD) 7 Softkey function display 2 Current menu heading 8 Softkey function display 3 Device condition (PAR for parameter setting) 9 Folder element 4 Failure is active 10 Selected element 5 Active parameter set 11 Measuring channel, e.g. channel I 6 Scrollbar Display of Measuring Channels I II IIA CI CII IIB 1 2 3 4 5 6 1 Channel I 3 First channel in MK-CC module 5 Calculation block 1 2 Channel II 4 Second channel in MK-CC module 6 Calculation block 2

38 Keypad 1 2 3 4 5 1 Left softkey: Function as shown on left function display 4 enter: Open menu, confirm inputs 2 Left/right arrow keys: Menu selection: prior/next menu, move left/ right 5 Right softkey: Function as shown on right function display 3 Up/down arrow keys: Row selection from selection window, increase/decrease a numeral Entering Text and Numbers; Selecting Signs 01. Select a number using the left/right arrow keys. 02. Enter numbers or letters using the up/down arrow keys. Change the sign, required. 03. Switch to signs using the left arrow key. 04. Set the sign value with the up or down arrow keys. 05. Confirm with enter. Note: If you enter values outside the specified value range, an information window showing the per- missible value range is shown.

39 4.3 Menu Structure Overview Measuring 2958 1989 Administrator Level 1246 Operator Level Passcode: (factory setting) Calibration Maintenance Parameter Setting Diagnostics Menu 1147 Message list, log, device and sensor information System control (time, firmware update, options, passcode entry), sensor selection, general (language, measurement display), inputs and outputs, measuring channels I and II Maintenance of sensors and current outputs Calibration mode, calibration points, buffer set 1 2 3 4 5 6 Submenus: 1 Left softkey: Pressing Menu accesses the menu selection. 4 Press enter to confirm, enter passcode. 2 Right softkey: Back to Meas. returns to measure- ment. 5 Further submenus and menu items are shown. 3 Select a menu using the arrow keys. 6 Selected functions in the Diagnostics menu can also be accessed in measuring mode by pressing the right softkey (Favorites menu). 4.4 Access Control Access to the device functions is regulated and limited by individually adjustable passcodes. This pre- vents unauthorized modification of device settings or manipulation of the measurement results. Passcodes are configured in Parameter Setting System Control ➜System Control, p. 43

40 4.5 Operating States While the parameters are being set, Stratos Multi is in the function check (HOLD) mode. The current output and relay contacts behave in accordance with the parameter settings. In the function check (HOLD) mode, measurement is not permitted since unexpected system behavior might put users at risk. Operating Mode Current Outputs Contacts Controller (PID Controller) Timeout1) Measuring - Diagnostics - Calibration2) - Maintenance2) Sensor Monitor - Current Source - Manual Controller - Parameter Setting2) 20 min Rinse Function2) 3) At end of rinse time Active (output functions normally) Manual control of the outputs Last value or fixed default value Depending on parameter setting 4.6 Measurement Display The following settings are possible: 2, 4, 6, or 8 values without measuring channel selection Any display of measured values from the measuring channels and the device possible 2 or 4 values with measuring channel selection Any display of measured values from the measuring channels Settings can be changed in the Measurement Display submenu: Parameter Setting General  Measurement Display An overview of display options can be found in the Parameter Setting chapter. ➜Parameter Setting, General, p. 48 The right softkey: Back to Meas. returns you to measurements from any menu level. You may have to confirm that the system is ready for measurement. If required, the display can be configured to switch off after not having been used for a user-defined period of time. This setting can be changed in the Display submenu: Parameter Setting General Display Display auto-off can be configured as follows: • No auto-off • After 5 minutes • After 30 minutes 1) “Timeout” means that the device will return to measuring mode after 20 minutes without key activity. 2) Function check (HOLD) is active. 3) Rinse contact is active.

41 5 Parameter Setting CAUTION! Incorrect parameter settings, calibration, and adjustments can result in incorrect outputs. For this reason, Stratos Multi must be commissioned by a specialist, who will also set the parameters, calibrate and adjust the device. Opening Parameter Setting Menu Menu Selection Parameter Setting Menu Selection Back Parameter Setting Lingua 01. From within measuring mode, press the left softkey: Menu. ✓The Menu Selection opens. 02. Using the right arrow key, select the Parameter Setting menu and confirm with enter. ✓The Parameter Setting menu contains items for things such as inputs and outputs, sensor selec- tion I and II, system control, and general parameter setting. Parameter setting is automatically ended 20 minutes after the last registered keystroke, after which Stratos Multi returns to mea- suring mode (timeout). Note: Function check (HOLD) is active. The current output and relay contacts behave in accordance with the parameter settings. Return to measuring mode to exit the function check, e.g., with the right softkey: Back to Meas. 5.1 Operating Levels There are three access levels in the Parameter Setting menu: • Viewing level (all data) • Operator level (operation data) • Administrator level (all data) Viewing Level • Display of all settings Settings cannot be changed in the Viewing level. Operator Level • Access to all functions that have been enabled at the Administrator level. Locked functions are displayed in gray and cannot be edited. Administrator Level • Access to all settings, including passcode settings.➜Passcode Entry, p. 48 • Enable or lock functions for access from within Operator level. ➜Locking a Function, p. 42 Functions that can be locked for the Operator level are marked with the “lock” icon. The functions are enabled or locked using the right softkey.

42 5.2 Locking a Function Example: Locking access to the configuration of relay contact K1 from the Operator level 01. Open Parameter Setting. 02. Select Administrator level. 03. Enter passcode (factory setting: 1989). 04. Select submenu: Inputs and Outputs Relay Contacts Contact K1 Relay Contacts (Admin.) Contact K1 Back Controller Lock Contact K2 Contact K3 Off 05. Right softkey: Lock ✓The Contact 1 submenu is now marked with the “lock” icon. This function can no longer be accessed from the Operator level. The softkey function automatically changes to Unlock. ✓At the Operator level, the locked function is shown in gray. Relay Contacts (Operator) Back Controller Back to Meas. Contact K2 Contact K3 Off Contact K1

43 5.3 System Control Submenus Description Memory Card This option is shown if a Data Card is inserted: Settings for logbook and measurement recorder data recording. Decimal separation can be set. The memory card can be formatted. Transfer Configuration If a Data Card is inserted, the measuring device’s configuration can be saved and transferred to another measuring device. ➜Transfer Configuration, p. 44 Parameter Sets Two parameter sets (A, B) are available in the device. If a Data Card is inserted, up to five parameter sets can be saved on or loaded from the Data Card. ➜Parameter Sets, p. 45 Function Control Allocation of functions for activation by softkey or optocoupler input OK1. ➜Function Control, p. 46 Calculation Blocks TAN option FW-E020: Convert available process variables to new variables.➜Calculation Blocks (TAN Option FW-E020), p. 46. Time/Date Define date and time format; input of date, time, and weekday. ➜Time/Date, p. 46 Meas. Point Description Free input of a tag number and notes; can be retrieved in the Diagnostics menu. ➜Measuring Point Description, p. 46 Firmware Update This option is shown if a FW Update Card is inserted. TAN option FW-E106: Firmware update with FW Update Card. ➜Firmware Update (TAN Option FW-E106), p. 46 Enable Options Activation of add-on options via TAN. The TAN is only valid for the Stratos Multi with the associated serial number. ➜Option Activation, p. 47 Logbook Select events to be logged (failure/maintenance required); can be retrieved in the Di- agnostics menu. ➜Logbook, p. 47 Buffer Table TAN option FW-E002: Specification of a buffer set. ➜pH Buffer Table: Entry of Individual Buffer Set (FW-E002), p. 199 Concentration Table TAN option FW-E009: Specification of a concentration solution for conductivity mea- surement. ➜Concentration Determination (FW-E009), p. 201. Restore Factory Settings Restore all parameters to factory settings. ➜Restore Factory Settings, p. 48 Passcode Entry Change passcodes. ➜Passcode Entry, p. 48

44 5.3.1 Transfer Configuration All device settings can be saved on a memory card (Data Card): Parameter Setting System Control Transfer Configuration Note: The inserted Data Card is shown on the display. • Select Save Configuration to write all the device settings (except passcodes) to the Data Card. Backup file generated on the Data Card: param/config.par • Select Load Configuration to read all the device settings from the Data Card and apply them to the device. Transferring all Device Settings from One Device to Other Devices Preconditions • The devices all feature identical hardware. • TAN options (add-on functions): All required TAN options must be enabled before they can be transferred. Steps 01. Parameter Setting System Control Transfer Configuration 02. Menu item Configuration: Save 03. Start the transfer with the right softkey: Execute. ✓The device settings are saved to the Data Card. 04. Switch to the Maintenance Open/Close Memory Card menu. 05. Terminate access to the memory card using the right softkey: Close. 06. Remove the Data Card. ✓You can transfer the device settings to other, identically equipped devices. 07. Insert the Data Card containing the device settings in the next device to be configured. 08. Parameter Setting System Control Transfer Configuration 09. Menu item Configuration: Load 10. Start the transfer with the right softkey: Execute. ✓The device settings are read from the Data Card and applied. 11. Switch to the Maintenance Open/Close Memory Card menu. 12. Terminate access to the memory card using the right softkey: Close. 13. Remove the Data Card. See also ➜Memory Card, p. 153

45 5.3.2 Parameter Sets Stratos Multi provides two complete selectable parameter sets (A/B) for different process connections or process conditions. The currently activated parameter set can be signaled by a relay contact. ➜Relay Contacts, p. 57. Parameter set “B“ only permits setting of process-related parameters. Parameter Setting System Control Parameter Sets Save Parameter Set The active parameter set is transferred to the Data Card. Note: The parameter set saved on the Data Card is overwritten. Load Parameter Set A parameter set stored on the Data Card is transferred to the device. Note: This overwrites the current parameter set in the device. Up to five parameter sets can be stored on the Data Card with TAN option FW-E102. ➜Parameter Sets 1-5 (FW-E102), p. 210 Selecting Parameter Sets A/B The control element for switching between parameter sets (optocoupler input OK1 or softkey) is se- lected in: Parameter Setting System Control Function Control The currently active parameter set is indicated by the or icons. Selection via a signal at optocoupler input OK1: Power supply (PWR out) 12 ... 24 V AC/DC 12 11 Optocoupler input Stratos Multi 0...2 V AC/DC: Parameter set A active 10…30 V AC/DC: Parameter set B active Note: The selection has no effect when using parameter sets from a memory card. Switching between parameter sets A and B is possible if they are saved in the device.

46 5.3.3 Function Control The following functions can be activated by softkey or optocoupler input OK1: Input OK1: • Parameter set selection • Flow • Function check • Function check (channel) Right softkey: • Off • Value rotation • Parameter set selection • Favorites menu The selection can be changed in the Function Control submenu: Parameter Setting System Control Function Control 5.3.4 Calculation Blocks (TAN Option FW-E020) Calculation blocks convert existing process variables to new variables. The menu is only shown if the TAN option is activated. Parameter Setting System Control Calculation Blocks See also ➜Calculation Blocks (FW-E020), p. 206 5.3.5 Time/Date The time and date in the installed real-time clock are required for: • Controlling calibration and cleaning cycles • Displaying the time on the display • Assigning times to the calibration data in the sensor head on digital sensors • Diagnostic functions; logbook entries are given a time stamp, for example Note: No automatic switchover from winter to summer time. Settings can be changed in the Time/Date submenu: Parameter Setting System Control Time/Date 5.3.6 Measuring Point Description You can enter a tag number and notes (e.g. date of last maintenance). Parameter Setting System Control Meas. Point Description Display of the tag number in the Diagnostics menu ➜Measuring Point Description, p. 131 5.3.7 Firmware Update (TAN Option FW-E106) The firmware update is carried out using TAN option FW-E106 and a FW Update Card. ➜Firmware Update (FW-E106), p. 213 The menu is only shown if the TAN option is activated and the FW Update Card has been inserted. Parameter Setting System Control Firmware Update

47 5.3.8 Option Activation Add-on functions (TAN options) expand the device’s capabilities. The TAN options are device-specific. When ordering a TAN option, you must therefore specify the serial number of the device in addition to the relevant order code for this function. The manufacturer then supplies a TAN (transaction number) to activate the add-on function. This TAN is only valid for the device with the stated serial number. You can find your device’s serial number in: Diagnostics Device Information Overview of TAN options ➜Product Range and Options, p. 12 Activate TAN Option 01. Parameter Setting System Control Option Activation 02. Select the option to be enabled. 03. Set to “Active” using the arrow keys. ✓Enter the TAN at the prompt. The current serial number is shown. 04. Enter the TAN and confirm with OK. ✓The option is available. Note: An activated TAN option can be deactivated and reactivated without having to re-enter the TAN. 5.3.9 Logbook The logbook records the last 100 events with date and time and displays them on the device. In addition, when using the Data Card and TAN option FW-E104, 20,000 entries or more can be stored on the Data Card. Parameter Setting System Control Logbook • Select whether to log failure and/or maintenance required messages in the logbook. • Delete the logbook entries Displaying the Logbook Entries The entries can be viewed in the Diagnostics menu ➜Logbook, p. 129 Menu  Diagnostics  Logbook 5.3.10 Measurement Recorder (TAN Option FW-E103) With TAN option FW-E103: Delete the data stored on the measurement recorder The menu is only shown if the TAN option is activated. Parameter Setting System Control Measurement Recorder See also ➜Measurement Recorder (FW-E103), p. 211 5.3.11 Buffer Table (TAN Option FW-E002) The menu is only shown if the TAN option is activated. Parameter Setting System Control Buffer Table See also ➜pH Buffer Table: Entry of Individual Buffer Set (FW-E002), p. 199

48 5.3.12 Concentration Table (TAN Option FW-E009) The menu is only shown if the TAN option is activated. Parameter Setting System Control Concentration Table See also ➜Concentration Determination (FW-E009), p. 201 5.3.13 Restore Factory Settings Allows the parameters to be reset to their factory settings: Parameter Setting System Control Restore Factory Settings NOTICE! All individual parameter settings will be overwritten with the factory settings. 5.3.14 Passcode Entry Passcodes (factory setting) Calibration 1147 Maintenance 2958 Operator Level 1246 Administrator Level 1989 The passcodes can be changed or deactivated in the Passcode Entry submenu: Parameter Setting System Control Passcode Entry Note: The passcode for the Administrator level cannot be deactivated. Note: If you lose the administrator passcode, system access is locked! The manufacturer can generate a rescue TAN. If you have any questions, please contact Knick Elektronische Messgeräte GmbH & Co. KG using the information provided on the last page of this document. 5.4 Parameter Setting, General Note: Function check (HOLD) is active. Submenus Description Language User interface language: German (factory setting), English, French, Italian, Spanish, Portuguese, Chinese Units/Formats Temperature unit °C (factory setting) or °F. Other units and formats depending on the selected process variable, e.g., pressure in mbar, kPa, psi Display format pH xx.xx or xx.x Measurement Display Values to be displayed (up to 8) ➜Configuring the Measurement Display, p. 49 Display Display color, brightness, and display auto-off (factory setting: None) ➜Display, p. 54 Measurement Recorder TAN option FW-E103: Logging of measured and additional values ➜Measurement Recorder (FW-E103), p. 211

49 5.4.1 Configuring the Measurement Display Parameter Setting General  Measurement Display 01. Set the number of values to be displayed: 2 values (1 channel), 2 values (2 channels), 4 values (2 channels), 2 values, 4 values, 6 values, 8 values 02. As required, assign channels and variables to be displayed. 03. Confirm with enter. Measurement Display, Example with 2 Values Selection Result Selection of any two variables: 2 Values I I Number 1st Value 2nd Value pH Value Temperature pH Value Temperature 2 Values (1 Channel) 2 Values (2 Channels) 4 Values (2 Channels) 4 Values 2 Values Select number of values. Confirm with enter. 2 Values pH Value Temperature I I Number 1st Value 2nd Value I I I I I pH Value ORP Temperature rH Value pH Voltage Select first variable. Confirm with enter. 2 Values pH Value Time I Number 1st Value 2nd Value Current Output 1 Dig. Controller Output Current Input Date Time Select second variable. Confirm with enter. Set further parameters with the left softkey: Back. End parameter setting with the right softkey: Back to Meas.. I Favorites Menu Menu pH 7.08 14:03 1 2 (1) First value (2) Second value

50 Measurement Display, Example with 2 Values (1 Channel) Selection Result Select two variables in one measuring channel: 2 Values pH Value I Number Channel 1 1st Meas. Value 2nd Meas. Value 2 Values (1 Channel) 2 Values (2 Channels) 4 Values (2 Channels) 4 Values 2 Values Select number of values and channels. Confirm with enter. 2 Values (1 Channel) Memosens pH/ORP I Number Channel 1 1st Meas. Value 2nd Meas. Value I Memosens pH/ORP Analog Cond II pH Voltage Assign a sensor to the channel. Confirm with enter. 2 Values (1 Channel) Memosens pH/ORP I I I Number Channel 1 1st Meas. Value 2nd Meas. Value I I I I I pH Value Redox Voltage Temperature rH Value pH Voltage Select the first variable for channel I. Confirm with enter. 2 Values (1 Channel) Memosens pH/ORP I I I Number Channel 1 1st Meas. Value 2nd Meas. Value I I I I Temperature pH Voltage rH Value Ref. Impedance Glass Impedance I Select the second variable for channel I. Confirm with enter. Set further parameters with the left softkey: Back. End parameter setting with the right softkey: Back to Meas.. I Favorites Menu Menu pH 9.89 178 mV 1 2 (1) First value in channel I (2) Second value in channel I

51 Measurement Display, Example with 2 Values (2 Channels) Selection Result Select two variables in two measuring channels: 2 Values pH Value I Number Channel 1 1st Meas. Value 2nd Meas. Value 2 Values (1 Channel) 2 Values (2 Channels) 4 Values (2 Channels) 4 Values 2 Values Select number of values and channels. Confirm with enter. 2 Values (2 Channels) Memosens pH/ORP Analog Cond I I Number Channel 1 1st Meas. Value Channel 2 1st Meas. Value pH Value II I Memosens pH/ORP Analog Cond II Conductivity II Assign a sensor to the first channel. Confirm with enter. 2 Values (2 Channels) Memosens pH/ORP Analog Cond I I Number Channel 1 1st Meas. Value Undefined Channel 2 1st Meas. Value pH Value I I I I I pH Value ORP Temperature rH Value pH Voltage II Select the variable for the first channel. Confirm with enter. 2 Values (2 Channels) Memosens pH/ORP I I Number Channel 1 1st Meas. Value Channel 2 1st Meas. Value pH Value II Analog Cond Analog Cond Undefined I Memosens pH/ORP Analog Cond II Assign a sensor to the second channel. Confirm with enter. 2 Values (2 Channels) Memosens pH/ORP Analog Cond I I Number Channel 1 1st Meas. Value Channel 2 1st Meas. Value II pH Value Conductivity Temperature Salinity Resistivity Conductance II II II II II Select the variable for the second channel. Confirm with enter. Set further parameters with the left softkey: Back. End parameter setting with the right softkey: Back to Meas.. I Favorites Menu Menu pH 7.08 984 II µS cm 1 2 (1) First value in channel I (2) Second value in channel II

52 Measurement Display, Example with 4 (6, 8) Values Selection Result Select any four (six, eight) variables 4 Values Number 1st Value 2nd Value 3rd Value 4th Value I I pH Value Temperature Conductivity II II Resistivity 4 Values (2 Channels) 2 Values 4 Values 8 Values 6 Values Select number of values. Confirm with enter. 4 Values Number 1st Value 2nd Value 3rd Value 4th Value I I pH Value Temperature Conductivity II II Resistivity I I I I I pH Value ORP Temperature rH Value pH Voltage Select first variable. Confirm with enter. 4 Values Number 1st Value 2nd Value 3rd Value 4th Value I I pH Value pH Voltage Conductivity II II Resistivity pH Voltage I II II II II Conductivity Temperature Salinity Resistivity Select second variable. Confirm with enter. 4 Values Number 1st Value 2nd Value 3rd Value 4th Value I I pH Value Temperature Conductivity II II Resistivity pH Value Conductivity Temperature Salinity Resistivity Conductance II II II II II Select third variable. Confirm with enter. 4 Values Number 1st Value 2nd Value 3rd Value 4th Value I I pH Value Temperature Conductivity II II Resistivity Salinity Resistivity II II II Conductance Time Date Select fourth variable. Confirm with enter. Set further parameters with the left softkey: Back. End parameter setting with the right softkey: Back to Meas.. I Favorites Menu Menu pH I 6.40 II II 178 mV 1,135 mS/cm 0.00 MΩcm 3 4 1 2 (1) First value (2) Second value (3) Third value (4) Fourth value

53 Measurement Display, Example with 4 Values (2 Channels) Selection Result Select four variables in two measuring channels: 2 Values pH Value I Number Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 II Analog Cond 2 Values (1 Channel) 2 Values (2 Channels) 4 Values (2 Channels) 4 Values 2 Values Select number of values and channels. Confirm with enter. 4 Values (2 Channels) Memosens pH/ORP Analog Cond I Number Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 II I pH Value I pH Voltage I Memosens pH/ORP Analog Cond II Assign a sensor to the first channel. Confirm with enter. 4 Values (2 Channels) Memosens pH/ORP Analog Cond I I Number Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 1st Meas. Value I pH Value I I I I I pH Value ORP Temperature rH Value pH Voltage II II Select the first variable for the first channel. Confirm with enter. 4 Values (2 Channels) Memosens pH/ORP Analog Cond I Number Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 II I Undefined I pH Value I I I I Temperature pH Voltage rH Value Ref. Impedance Glass Impedance I Select the second variable for the first channel. Confirm with enter. 4 Values (2 Channels) Memosens pH/ORP Analog Cond I I Number Channel 1 1st Meas. Value Undefined 2nd Meas. Value Channel 2 1st Meas. Value I pH Value I Memosens pH/ORP Analog Cond II II pH Voltage Assign a sensor to the second channel. Confirm with enter. Memosens pH/ORP Analog Cond I I Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 1st Meas. Value I pH Value II Conductivity II pH Voltage 2nd Meas. Value II Resistivity pH Value Conductivity Temperature Salinity Resistivity Conductance II II II II II Select the first variable for the second channel. Confirm with enter.

54 Selection Result Memosens pH/ORP Analog Cond I Channel 1 1st Meas. Value 2nd Meas. Value Channel 2 1st Meas. Value 2nd Meas. Value II I pH Value I pH Voltage II Conductivity II Resistivity I Conductivity I pH Value pH Voltage pH Value Conductivity Temperature Salinity Resistivity Conductance II II II II II Select the second variable for the second channel. Confirm with enter. Set further parameters with the left softkey: Back. End parameter setting with the right softkey: Back to Meas.. I Favorites Menu Menu pH 4.00 II 178 mV 1.135 mS/cm 0.00 MΩcm 1 2 3 4 (1) First value in channel I (2) Second value in channel I (3) First value in channel II (4) Second value in channel II 5.4.2 Display It is possible to change the display’s color and brightness. The following settings are possible Display Color White, NE107 (factory setting): If a NAMUR message is available for a measured value, the measured value is backlit in accordance with the NAMUR color. Brightness Factory setting: 80 % Auto-off None (factory setting), after 5 min, after 30 min Settings can be changed in the Display submenu: Parameter Setting General Display Note on Display Auto-off The display switches off 5 or 30 minutes after the last keystroke is registered. Press any key to switch the display back on. 5.4.3 Measurement Recorder (TAN Option FW-E103) The measurement recorder logs measured values and additional values depending on its parameter setting. The last 100 entries are graphically presented on the display of the Stratos Multi. The menu is only shown if the TAN option is activated. Parameter Setting General Measurement Recorder See also ➜Measurement Recorder (FW-E103), p. 211 5.5 Inputs and Outputs The following inputs and outputs are available: • Four current outputs 0/4 ... 20 mA for transferring variables such as measured value or temperature (factory setting); two of these outputs can be enabled via TAN; active or passive configuration ➜Current Outputs, p. 55 • Three freely configurable floating switching outputs, ➜Relay Contacts, p. 57 of which two can be used to control a PID controller ➜PID Controller, p. 61 • Two digital control inputs, OK1 and OK2 ➜Control Inputs, p. 62

55 5.5.1 Current Outputs The current outputs are deactivated ex works. Current outputs 3 and 4 need to be activated by TAN (TAN option FW-E052). Adjustable parameters for the current outputs Usage On, Off Process Variable Selection from all available process variables Current Range 4 … 20 mA or 0 … 20 mA Characteristic Linear Trilinear (input of additional vertex points required) Function (input of a 50 % point required) Logarithmic Table (with TAN option FW-E006 “current characteristic”) ➜Current Characteristic (FW-E006), p. 201 Output Output current range 4 … 20 mA or 0 … 20 mA Start 0(4) mA Start of span End 20 mA End of span Output Filter To smooth the current output, a low-pass filter with adjustable filter time constant can be switched on. The filter acts on the current output only. Function Check Current output response in the Function Check mode: Output of the current measure- ment, the last measured value, or a fixed value 0 … 22 mA. Behavior during Messages Failure Current output response in the event of a failure message: Off, 3.6 mA, 22 mA Delay Input of a delay of 0 … 600 s in the event of a failure message. Settings can be changed in the Current Outputs submenu: Parameter Setting Inputs and Outputs Current Outputs Setting the Span: Start (0/4 mA) and End (20 mA) 0 5 7 14 [pH] [mA] 4 20 5 7 [pH] [mA] 4 20 1 2 1 Span pH 0 … 14 2 Span pH 5 … 7 Higher resolution in range of interest

56 Characteristic Curves Linear Characteristic The process variable is represented by a linear output current curve. Output 4 … 20 mA, span pH 0 … 14 Output 4 … 20 mA, span pH 5 … 9 Start End pH 0 20 mA 4 8 12 16 4 6 8 2 10 12 14 Start End pH 5 20 mA 4 8 12 16 6 7 8 9 Trilinear/Bilinear Curve Requires the input of two additional vertex points. Trilinear: Vertex points (1) and (2) are different values. Bilinear: Vertex points (1) and (2) are the same values. Output 4 … 20 mA, span pH 0 … 14 Output 4 … 20 mA, span pH 5 … 9 Start End pH 0 20 mA 4 8 12 16 4 6 8 2 10 12 14 1 2 Start End pH 20 mA 4 8 12 16 6 8 2 10 12 14 4 2 1 Function/Logarithmic Curve Nonlinear output current characteristic: allows measurements over several decades, e.g. measuring very low values with a high resolution and high values with a low resolution. Requires the input of the value for 50 % output current. Characteristic: Function with input of 50 % value (1) Characteristic: Logarithmic Output 4 … 20 mA, span 1 … 100 µS/cm Output 4 … 20 mA, span 1 … 1000 µS/cm Start End μS/cm 0 20.0 mA 4.0 8.0 12.0 16.0 20 30 40 10 50 60 70 80 90 100 1 Start End μS/cm 0 20.0 mA 4.0 8.0 12.0 16.0 200 300 400 100 500 600 700 800 900 1000

57 Output Filter Time Interval To smooth the current output, a low-pass filter with adjustable time interval can be switched on. When there is a jump at the input (100 %), the output level is at 63 % after the time interval has been reached. The time interval can be set from 0 to 120 sec. If the time interval is set to 0 sec, the current output follows the input. Note: The filter only acts on the current output, not on the display, the limit values or the controller! Current During Function Check (HOLD) Depending on the parameter setting, the current outputs switch to one of the following states: • Current measurement • Last measured value (factory setting) • Fixed value Message when the Current Range is Exceeded As delivered, the “Failure” message is generated when the current range is exceeded (< 3.8 mA or > 20.5 mA). This setting can be changed in the parameter settings for the respective measuring channel in the Messages menu: Parameter Setting [I] [II] [Sensor] Messages 5.5.2 Relay Contacts Up to three free relay contacts K1 … K3 can be configured. Contacts K2 and K3 are occupied if the con- troller is used. ➜PID Controller, p. 61 Notes on wiring ➜Relay Contacts: Protective Wiring, p. 27 Use of Relay Contacts The following uses are possible: • Off • Failure • Maintenance required • Out of specification • Function check • Limit value • Rinse contact • Rinse contact (channel) (if using two channels) • Parameter set B active • USP output (with conductivity sensor only) • Sensoface • Sensoface (channel) (if using two channels) The switching behavior can be adjusted (normally open or normally closed contact). • N/O/normally open/make contact: the relay contact closes when it is activated. • N/C/normally closed/break contact: the relay opens when it is activated. ON/OFF delays can also be configured. Settings can be changed in the Relay Contacts submenu: Parameter Setting Inputs and Outputs Relay Contacts

58 Usage: Failure 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Failure 04. Set the contact parameters. Failure is active • if a value has exceeded or fallen below “Failure Limit Hi“ or “Failure Limit Lo“ respectively • if the device’s measuring range limits are exceeded • in the event of other failure messages That means that the equipment no longer operates properly or that process parameters have reached a critical value. The relay contact is not activated for “Function check” (HOLD). Usage: Maintenance Required 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Maintenance Required 04. Set the contact parameters. Maintenance required is active if messages appear that require maintenance. That means that the equipment is still operating properly but should be serviced, or that process parameters have reached a value requiring intervention. Typical example: The meter detected a worn sensor. The relay contact is not activated for “Function check” (HOLD). Usage: Out of Specification 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Out of Specification 04. Set the contact parameters. Out of specification is active • if a value has exceeded or fallen below “Out of Specification Hi“ or “Out of Specification Lo“ respectively • if the device has detected deviations from the permissible ambient or process conditions • if faults are present indicating that the measurement uncertainty is probably greater than to be expected under normal operating conditions The relay contact is not activated for “Function check” (HOLD).

59 Usage: Function Check 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Function Check 04. Set the contact parameters. Function check (HOLD) is active: • during calibration (only the corresponding channel) • during maintenance (current source, relay test) • during parameter setting at the operator level or the administrator level • during an automatic rinse cycle. The output signal is temporarily frozen. Usage: Limit 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Limit 04. Set the contact parameters. Contact K1 (Admin.) Process Variable Back Usage Limit Hysteresis Direction Limit pH Value Minimum pH 3.00 pH 0.10 Contact Type Normally Open N/O Back to Meas. II The hysteresis prevents small fluctuations in the measured value around the limit from constantly trig- gering a switching operation. The hysteresis is configurable and can be activated with an ON/OFF delay time. In the measurement display, an icon is used to indicate if the limit has been exceeded. Hysteresis + Limit 1 0 Contact Hysteresis - Limit Contact 1 0 Signal Signal Measured value falls below limit Measured value exceeds limit Effective direction: Minimum Effective direction: Maximum

60 Usage: Rinse Contact Please note when configuring the “Rinse Contact” function • The “function check” (HOLD) mode (e.g. during parameter setting) delays the execution of the “rinse contact” function. • Up to 3 rinse functions (contacts K1 ... K3) can be configured independently of each other. • The individual rinse functions are not synchronized with each other. Configuring the Rinse Contact 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Rinse Contact 04. Select contact type (e.g. “N/O”). 05. Specify rinsing interval. 06. Specify rinse duration. 07. Specify rinse/meas. lead time. Note: Function check (HOLD) is active during the defined “Lead Time...” 08. Logbook entry: off/on Usage: USP Output Can be activated when using a conductivity sensor and the USP function ➜USP Function, p. 81 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: USP Output 04. Assign USP channel. 05. Set the contact parameters. Usage: Sensoface Sensoface messages can be output via a relay contact. If using two sensors, the Sensoface messages can be assigned to different contacts: 01. Open Inputs and Outputs Relay Contacts . 02. Select the desired contact with the up/down arrow keys and enter. 03. Usage: Sensoface Channel 04. Select channel. Contact K1 (Admin.) Channel Back Usage Contact Type ON Delay OFF Delay Sensoface Channel Memosens pH N/O.. I Memosens pH Memosens Cond II 0 s 0 s 05. Set the contact parameters. 06. Using the left softkey: Back, go to the Relay Contacts menu and configure the second contact. See also ➜Sensocheck and Sensoface, p. 151

61 5.5.3 PID Controller The PID controller can be configured as a pulse length or pulse frequency controller. Controller Type Pulse length or pulse frequency controller; see below. Controlled Variable Depending on the connected sensors. Setpoint and Neutral Zone Input of setpoint and neutral zone in percent of the respective controller variable. Pulse Period or Maximum Pulse Frequency 0 ... 600 seconds or 0 ... 180 per minute (P) Controller Gain Specified in percent (I) Reset Time 0 ... 9999 seconds. 0 s = reset time (integral action) deactivated. (D) Rate Time 0 ... 9999 seconds. 0 s = rate time (derivative action) deactivated. Feed Time Alarm after 0 ... 9999 seconds Behavior during HOLD Y = constant oder Y = 0 % Settings can be changed in the Relay Contacts submenu: Parameter Setting Inputs and Outputs Relay Contacts Controller As soon as the “PID Linear” controller is selected, contacts K2 and K3 are occupied by the controller. The corresponding settings are displayed in the Controller Contacts K2/K3 submenu; see the table. Pulse Length Controller The pulse length controller is used to control a valve as an actuator. It switches the contact on for a length of time depending on the controller output (Y). The cycle duration remains constant. The ON time does not fall below the minimum of 0.5 s, even if the controller output assumes corresponding values. 1_ 0_ 1_ 0_ 2 1 3 1 ON time (Y = 20 %) 3 Pulse period 2 ON time (Y = 80 %)

62 Pulse Frequency Controller The pulse frequency controller is used to control a frequency-controlled actuator (metering pump). It varies the frequency with which the contacts are switched on. The maximum pulse frequency [Imp/ min] can be configured, and is dependent on the actuator. The ON time is constant. It is automatically calculated from the configured maximum pulse frequency. 1_ 0_ 1_ 0_ 1 2 3 1 ON time 3 Pulse frequency (Y = 80 %) 2 Pulse frequency (Y = 20 %) Adjustable Controlled Variables Sensor type Controlled variable pH, ORP pH value, ORP, temperature Conductivity Conductivity, temperature, with TAN option FW-E009: Concentration (liquid) Oxygen Saturation %air, saturation %O2, temperature See also ➜Basics of PID Control, p. 215 5.5.4 Control Inputs Stratos Multi provides 2 digital optocoupler inputs (OK1, OK2). The following functions (depending on the parameter setting) can be started via the control signals: Input OK1: off, parameter set selection, flow, function check total, or function check channel • The function of optocoupler input OK1 is defined in the System Control : Parameter Setting System Control Function Control ➜Function Control, p. 46 Input OK2: off, function check total, or functional check channel. • Selection in the menu Parameter Setting Inputs and Outputs Control Inputs Input OK2 The switching level for the control signal must be specified: Parameter Setting Inputs and Outputs  Control Inputs Contacts Input OK… Input level: Active 10 ... 30 V or active < 2 V

63 5.6 Sensor Selection [I] [II] Note: Function check (HOLD) is active. Stratos Multi is factory-set to a pH value measurement with Memosens sensor. This measuring func- tion is also provided by the ORP measurement. The measuring function can be changed to measure conductivity or oxygen in the Parameter Setting menu: To prepare Stratos Multi for measurements, the operating mode of the used measuring channel must be set: Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] (measuring channel I): Memosens sensor or SE740 optical oxygen sensor (LDO) Sensor Selection [II] (measuring channel II): Second Memosens sensor or analog sensor via measuring module If Memosens sensors are connected directly, the process variable can be set to “Auto”. In this case, the sensor is automatically detected by the device, which sets itself to the correct process variable. This does not apply to the MK-MS095N Memosens module. NOTICE! Parameters that are dependent on process variables (e.g. measurement display, current out- puts, contacts, ...) are set separately; this step is not automatic. If “Auto” is not used with a Memosens sensor, and in general when using analog sensors, the operating mode must be set to the used sensor. The parameters that are dependent on process variables can then be set when a sensor is not connected. Power Out The output voltage of terminal 6 is selected in the Power Out menu item: 3.1 V, 14 V, 24 V. This output voltage is used to supply power to special sensors or external transmitters. The voltage at terminal 6 is automatically adjusted when using the SE740 optical oxygen sensor. The menu item is then not avail- able. Identifying a Memosens Sensor A connected Memosens sensor is displayed as follows: sensor name, manufacturer, serial number, date of last adjustment All relevant and typical sensor parameters are automatically transferred to the Stratos Multi.

64 5.7 Process Variable pH Note: Function check (HOLD) is active. Note: After changing the process variable or measuring mode, Stratos Multi retains its settings but needs to be reconfigured. Selecting a Memosens pH Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of the Memosens pH sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or pH Mode: Memosens Functionality: pH, ISFET, or pH/ORP (depending on sensor type) Selecting a Second Memosens pH Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a second Memosens pH sensor connected to the MK-MS 095N measuring module: Module: MK-MS Parameter: pH Mode: Memosens Functionality: pH, ISFET, or pH/ORP (depending on sensor type) Adjustable parameters for Memosens pH sensors Parameter Setting [I] [II] Memosens pH Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 66 Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Option to enter individual limits for monitoring slope and zero point. Enable/disable Sensocheck sensor monitoring. Set whether Sensocheck should generate failure or maintenance required messages. Option to enter individual values before a message is trig- gered for response time, sensor wear, sensor operating time and SIP counter; also CIP counter with pH/ORP sensors; also operating point and leakage current with ISFET sensors. Cal Presettings Presetting of calibration mode and corresponding parameters, configuration of drift check and calibration timer. ➜Calibration Presettings, p. 68 TC Process Medium ➜Temperature Compensation of Process Medium, p. 69 ORP/rH Value With Memosens pH/ORP sensor: Selection of reference electrode: Ag/AgCl, KCl 1 mol, Ag/AgCl, KCl 3 mol, Hg,Tl/TlCl, KCl 3.5 mol, Hg/Hg2SO4, K2SO4 sat Enable/disable ORP conversion to standard hydrogen electrode SHE. Calculate rH with or without factor. Delta Function Display deviations from a preset value (delta value): Output value = measured value – delta value ➜Delta Function, p. 70 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 71

65 Selecting an Analog pH Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a pH or pH/ORP sensor connected to the MK-MS 015N measuring module: Module: MK-PH Mode: Analog Adjustable parameters for analog sensors Parameter Setting [II] Analog pH Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 66 Sensor Type and Sensoface Sensoface, temperature monitoring, and the details of sensor monitoring can be set, depending on the sensor type. Temperature Detection Select temperature probe, set measuring and calibration temperature. Sensor Monitoring Details Slope, zero point, set Sensocheck of reference and glass electrodes, and select response time. Cal Presettings Presetting of calibration mode and calibration timer with corresponding parameters. ➜Calibration Presettings, p. 68 TC Process Medium ➜Temperature Compensation of Process Medium, p. 69 ORP/rH Value With pH/ORP sensor: Selection of reference electrode. Enable/disable ORP conversion to standard hydrogen electrode SHE. Calculate rH with or without factor. Delta Function Display deviations from a preset value (delta value): Output value = measured value – delta value ➜Delta Function, p. 70 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 71

66 5.7.1 Sensor Data Memosens Sensors Memosens sensors provide relevant sensor data automatically. Analog Sensors The sensor type must be selected if using analog sensors: Parameter Setting [II] Analog … Sensor Data Sensor Data Sensor Type Standard On Back Sensor Monitoring Details Temperature Detection Sensoface II Back to Meas. 01. In Temperature Detection , select the used temperature probe and whether the temperature is to be measured automatically or manually during measurement and/or calibration. Temperature Detection (Admin.) Measuring Temp Back Temperature Probe Cal Temperature Pt 1000 Automatic Automatic II Pt 100 Pt 1000 NTC 30k NTC 8.55k Balco 3 kΩ Sensoface The Sensoface icons provide the user with diagnostic information on wear and required maintenance of the sensor. In measuring mode, an icon (happy, neutral, or sad smiley) is shown on the display to re- flect the continuous monitoring of the sensor parameters. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. Parameter Setting Inputs and Outputs Current Outputs Current Output I… Behavior during Messages The Sensoface message can also be output via a relay contact: Parameter Setting Inputs and Outputs Relay Contacts  Contact K… ➜Usage: Sensoface, p. 60 Sensoface monitors the pH sensor on the basis of the following parameters: Slope, zero point, glass impedance (if Sensocheck is enabled), response time, calibration timer, wear Enabling/Disabling Sensoface Sensoface is enabled and disabled in the Sensor Data submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Note: After a calibration, a smiley is always displayed for confirmation, even if Sensoface is disabled.

67 Adjusting Sensor Monitoring 01. Open Sensor Data Sensor Monitoring Details . 02. Open a sensor parameter, e.g., Slope . 03. Set Monitoring of the slope to automatic or individual. 04. If you select “Individual”: The nominal slope and the min/max limits can be entered. 05. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message, but the parameter is still shown on the sensor diagram. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Mainte- nance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. 06. Set the sensor monitoring details for other sensor data, e.g. zero point, Sensocheck, response time, sensor wear, or sensor operating time. 07. Using the left softkey: Back, confirm the sensor monitoring settings and adjust further parameters. or Using the right softkey: Back to Meas., confirm the sensor monitoring settings and end the func- tion check (HOLD).

68 CIP/SIP Counters Note: CIP/SIP counters are available for the following pH sensor types: SIP counter: Memosens pH, Memosens pH/ORP; CIP counter: Memosens pH/ORP CIP/SIP cycles are used to clean or sterilize process-wetted parts in the process. Depending on the ap- plication, either one chemical (alkaline solution, water) or several chemicals (alkaline solution, water, acidic solution, water) are used. • CIP temperature > 55 °C/131 °F • SIP temperature > 115 °C/239 °F The cleaning (cleaning in place) and sterilization (sterilization in place) cycles are counted to measure the load on the sensor, e.g., in biotechnology applications. Note: If measurements are generally taken at high temperatures (> 55 °C/131 °F), the counters should be switched off. When a CIP/SIP counter is switched on, a maximum number of cycles can be entered. As soon as the counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. Note: A CIP or SIP cycle is only entered into the logbook 2 hours after the start to ensure that the cycle is complete. Note: With Memosens sensors, an entry is also made in the sensor. 5.7.2 Calibration Presettings The calibration presettings can be defined in the parameter settings or adjusted directly in the Calibra- tion menu prior to the calibration. Calibration mode: Presetting of calibration mode, e.g., Calimatic, manual, product calibration, data en- try, temperature If Calimatic automatic calibration is selected, the buffer set to be used must also be selected. Calibration points: Selection of how many calibration points are to be used in the calibration Drift check: Sets the sensitivity of the drift check (fine, standard, coarse) Cal Presettings (Administrator) Buffer Set Back Calibration Mode Calibration Points Drift Check Calibration Timer ORP Check Calimatic Knick CaliMat Automatic Standard II Knick CaliMat Mettler-Toledo Merck/Riedel DIN19267 NIST Standard Calibration Timer When a preset calibration interval expires, the calibration timer generates a message text to indicate the need for calibration. If “Auto” is selected, the interval is set to 168 h. If “Individual” is selected, you can select a custom interval. Calibration Timer (Admin.) Adaptive Cal Timer Back Monitoring Auto Calibration Timer 168 h Off II Off On

69 Note: If Sensoface is enabled, a neutral smiley is displayed once 80 % of the interval has expired. Once the entire interval has expired, a sad smiley is shown, a maintenance required message is generated, and the corresponding NAMUR icon is displayed. If the current outputs are configured accordingly, a 22-mA error signal is generated. Adaptive calibration timer: The time until the next calibration is automatically shortened depending on the temperature and pH value. Old sensor = timer expires faster. The following measuring conditions shorten the adaptive calibration timer interval: • Temperatures above 30 °C/86 °F • pH ranges below pH 2 or above pH 12 The message test is displayed in the Diagnostics menu: Diagnostics Message List The calibration timer is reset after each calibration. Settings can be changed in the Cal Presettings submenu: Parameter Setting [I] [II] [Sensor] Cal Presettings 5.7.3 Temperature Compensation of Process Medium Note: If temperature compensation of the process medium is enabled, “TC” is shown on the display in measuring mode. Note: Function check (HOLD) is active. The current output and relay contacts behave in accordance with the parameter settings. Return to measuring mode to exit the function check, e.g., with the right softkey: Back to Meas. The following are available for temperature compensation: • Linear with input of a temperature coefficient TC • Ultrapure water • Table Linear Temperature Compensation of Process Medium If the medium’s pH value changes in linear fashion with the temperature, the temperature coefficient TC can be determined for temperature compensation in %/K as follows: TC = (pH25 – pHT) · 100 / (25 °C – T) [%/K] TC Temperature coefficient [%/K] pH25 pH value at 25 °C pHT pH value at measuring temperature T T Measuring temperature [°C]

70 Table When using process media with a known pH value temperature response, the pH output value can be corrected using a table. The percentage deviation from the measured value in % can be entered for temperatures between 0 and 95 °C in steps of 5 °C. The pH output value is then corrected by the corresponding percentage deviation from the measured value in %, depending on the measuring temperature. Table values are linearly interpolated. If the temperature falls below or exceeds the specified value (< 0 °C or > 95 °C), the last value in the table is used for calculation. The table must be completed with the following values in steps of 5 °C: ((pH25 / pHT) – 1) • 100 [%] pH25 pH value at 25 °C pHT pH value at measuring temperature T Settings can be changed in the TC Process Medium submenu: Parameter Setting [I] [II] … pH TC Process Medium Note: If the delta function and TC correction are enabled at the same time, the TC correction is carried out first and the delta value is then deducted. 5.7.4 Delta Function Note: If the delta function is enabled, “∆” is shown on the display in measuring mode. If a delta value is specified, the measuring system calculates the difference output value = measured value – delta value The delta value can be set using the “+” or “-” signs. If using a negative sign, the delta value is added to the measured value. The delta value is adjusted in the Delta Function submenu: Parameter Setting [I] [II] [Sensor] Delta Function All outputs are controlled by the output value; the displays show the output value. Note: If the delta function and TC correction are enabled at the same time, the TC correction is carried out first and the delta value is then deducted.

71 5.7.5 Messages All values determined by the measuring module or sensor can generate messages. Messages can be configured for the following process variables: • pH value • ORP (with pH/ORP sensor) • rH value (with pH/ORP sensor) • Temperature • pH voltage Configuring Messages Process variable limits for the monitoring range can be selected in the Messages submenu: Menu Selection Parameter Setting [I] [II] [Sensor] Messages Messages [Process Variable] Monitoring • Max. Device Limits: Messages are generated when the process variable is outside the measuring range. The “failure” or “out of specification” icons are shown; the corresponding relay contact is enabled. The current outputs can signal a 22-mA message (user-defined). • Variable Limits: Upper and lower limits at which a message is generated can be defined for the “failure” and “out of specification” messages. Displaying Messages Go to the Diagnostics menu if the “failure”, “maintenance required”, or “out of specification” icons are flashing on the display. Menu Selection Diagnostics Message List All active messages are displayed in the “Message List” menu item with the following information: Er- ror number, type (failure, maintenance required, out of specification), channel, message text. You can scroll forward and backward using the up/down arrow keys. The error message disappears from the display around 2 s after the error is cleared. An overview of message texts with notes on troubleshooting can be found in the “Troubleshooting” chapter. ➜Malfunction States, p. 136

72 5.8 Process Variable ORP Note: Function check (HOLD) is active. Note: After changing the process variable or measuring mode, Stratos Multi retains its settings but needs to be reconfigured. Selecting a Memosens ORP Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of a Memosens ORP sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or pH Mode: Memosens Functionality: ORP Selecting a Second Memosens ORP Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a second Memosens ORP sensor connected to the MK-MS 095N measuring module: Module: MK-MS Parameter: pH Mode: Memosens Functionality: ORP Adjustable parameters for Memosens ORP sensors Parameter Setting [I] Memosens ORP Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 73 Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Option to enter individual limits for monitoring ORP offset. Option to enter individual limits before a message for sensor operating time and SIP counter is triggered. Cal Presettings Presetting of the calibration mode; configuration of the calibration timer and ORP check. ➜Calibration Presettings, p. 74 ORP/rH Value Selection of reference electrode. Enable/disable ORP conversion to standard hydrogen electrode SHE. If using a pH sensor connected via a module at the same time: Calculate rH with or without factor. Delta Function Display deviations from a preset value (delta value): Output value = measurement - delta value Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 75 Selecting an Analog ORP Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of an ORP sensor connected to the MK-PH015N measuring module: Module: MK-PH Mode: Analog When using an analog ORP sensor, the menus are the same as for an analog pH sensor: Parameter Setting [II] Analog pH

73 5.8.1 Sensor Data Memosens sensors provide relevant sensor data automatically. Sensoface The Sensoface icons provide the user with diagnostic information on wear and required maintenance of the sensor. In measuring mode, an icon (happy, neutral, or sad smiley) is shown on the display to re- flect the continuous monitoring of the sensor parameters. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. Parameter Setting Inputs and Outputs Current Outputs Current Output I… Behavior during Messages The Sensoface message can also be output via a relay contact: Parameter Setting Inputs and Outputs Relay Contacts  Contact K… ➜Usage: Sensoface, p. 60 Enabling/Disabling Sensoface Sensoface is enabled and disabled in the Sensor Data submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Note: After a calibration, a smiley is always displayed for confirmation, even if Sensoface is disabled. Adjusting Sensor Monitoring 01. Open Sensor Data Sensor Monitoring Details . 02. Open a sensor parameter, e.g., ORP Offset . 03. Set Monitoring of the ORP offset to automatic or individual. 04. If you select “Individual”: The nominal ORP offset and the min/max limits can be entered. 05. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Maintenance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. 06. Set the sensor monitoring details for further sensor data such as sensor operating time or SIP counter. 07. Using the left softkey: Back, confirm the sensor monitoring settings and adjust further parameters. or Using the right softkey: Back to Meas., confirm the sensor monitoring settings and end the func- tion check (HOLD). CIP/SIP Counters Note: CIP/SIP counters are available for the following pH sensor types: SIP counter: Memosens pH, Memosens pH/ORP; CIP counter: Memosens pH/ORP CIP/SIP cycles are used to clean or sterilize process-wetted parts in the process. Depending on the ap- plication, either one chemical (alkaline solution, water) or several chemicals (alkaline solution, water, acidic solution, water) are used. • CIP temperature > 55 °C/131 °F • SIP temperature > 115 °C/239 °F The cleaning (cleaning in place) and sterilization (sterilization in place) cycles are counted to measure the load on the sensor, e.g., in biotechnology applications.

74 Note: If measurements are generally taken at high temperatures (> 55 °C/131 °F), the counters should be switched off. When a CIP/SIP counter is switched on, a maximum number of cycles can be entered. As soon as the counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. Note: A CIP or SIP cycle is only entered into the logbook 2 hours after the start to ensure that the cycle is complete. Note: With Memosens sensors, an entry is also made in the sensor. 5.8.2 Calibration Presettings The calibration presettings can be defined in the parameter settings or adjusted directly in the Calibra- tion menu prior to the calibration. Calibration mode: Presetting of the calibration mode, e.g., ORP data entry, ORP adjustment, ORP check, temperature Calibration timer: When a preset calibration interval expires, the calibration timer generates a mes- sage text to indicate the need for calibration. If “Auto” is selected, the interval is set to 168 h. If “Individ- ual” is selected, you can select a custom interval. Note: If Sensoface is enabled, the smiley is “sad” as soon as the interval has expired. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. ORP check: Settings for test period in seconds and test difference in millivolts Cal Presettings (Admin.) Back Calibration Mode Drift Check Calibration Timer ORP Check ORP Data Entry Standard II Data Entry ORP Data Entry ORP Adjustment ORP Check Temperature Settings can be changed in the Cal Presettings submenu: Parameter Setting [I] [II] [Sensor] Cal Presettings 5.8.3 Delta Function Note: If the delta function is enabled, “∆” is shown on the display in measuring mode. If a delta value is specified, the measuring system calculates the difference output value = measured value – delta value The delta value can be set using the “+” or “-” signs. If using a negative sign, the delta value is added to the measured value. The delta value is adjusted in the Delta Function submenu: Parameter Setting [I] [II] [Sensor] Delta Function All outputs are controlled by the output value; the displays show the output value. Note: If the delta function and TC correction are enabled at the same time, the TC correction is carried out first and the delta value is then deducted.

75 5.8.4 Messages All values determined by the measuring module or sensor can generate messages. Messages can be configured for the following process variables: • ORP voltage • Temperature Configuring Messages Process variable limits for the monitoring range can be selected in the Messages submenu: Menu Selection Parameter Setting [I] [II] [Sensor] Messages Messages [Process Variable] Monitoring • Max. Device Limits: Messages are generated when the process variable is outside the measuring range. The “failure” or “out of specification” icons are shown; the corresponding relay contact is en- abled. The current outputs can signal a 22-mA message (user-defined). • Variable Limits: Upper and lower limits at which a message is generated can be defined for the “failure” and “out of specification” messages. Displaying Messages Go to the Diagnostics menu if the “failure”, “maintenance required”, or “out of specification” icons are flashing on the display. Menu Selection Diagnostics Message List All active messages are displayed in the “Message List” menu item with the following information: Er- ror number, type (failure, maintenance required, out of specification), channel, message text. You can scroll forward and backward using the up/down arrow keys. The error message disappears from the display around 2 s after the error is cleared. An overview of message texts with notes on troubleshooting can be found in the “Troubleshooting” chapter. ➜Malfunction States, p. 136

76 5.9 Process Variable Conductivity (Contacting) Note: Function check (HOLD) is active. Note: After changing the process variable or measuring mode, Stratos Multi retains its settings but needs to be reconfigured. Selecting a Memosens Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of a Memosens conductivity sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or Conductivity Mode: Memosens Functionality: 2-Electrode Sensor or 4-Electrode Sensor (depending on sensor type) Selecting a Second Memosens Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a second Memosens conductivity sensor connected to the MK-MS 095N measuring mod- ule: Module: MK-MS Parameter: Conductivity Mode: Memosens Functionality: 2-Electrode Sensor or 4-Electrode Sensor (depending on sensor type) Adjustable parameters for Memosens conductivity sensors Parameter Setting [I] [II] Memosens Cond Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 77 Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Option to enter individual limits for monitoring cell constants. Disable Sensocheck sensor monitoring or select whether Sensocheck should generate failure or maintenance required messages. Option to enter individual limits before a message for SIP counter, CIP counter, and sensor operating time is triggered. Cal Presettings Presetting of calibration mode with corresponding parameters. ➜Calibration Presettings, p. 79 TC Process Medium ➜Temperature Compensation of Process Medium, p. 80 Concentration ➜Concentration (TAN Option FW-E009), p. 80 TDS Enable/disable TDS function (“Total Dissolved Solids” that influence conductivity) USP Enable/disable USP function for monitoring ultrapure water and set the USP limit. ➜USP Function, p. 81 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 82

77 Selecting an Analog Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a conductivity sensor connected to the MK-COND025N measuring module: Module: MK-COND Mode: Analog Analog 2-channel conductivity measurement with the MK-CC065 measuring module ➜Dual Conductivity Measurement, p. 89 Adjustable parameters for analog conductivity sensors Parameter Setting [II] Analog Cond Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 77 Sensor Type Select the used sensor type: 2-el.-sensor, 4-el.-sensor, SE600, SE602, SE603, SE604, SE610, SE620, SE630. Nominal Cell Constant Enter when 2-el. or 4-el. sensor is selected. Sensoface Enable/disable display of Sensoface messages and icons. Sensocheck Enable or disable Sensocheck to generate failure or mainte- nance required messages. Temperature Detection Set measuring and calibration temperature. When 2-el. or 4-el. sensor is selected: Select temperature probe. Cal Presettings Presetting of calibration mode with corresponding parameters. ➜Calibration Presettings, p. 79 TC Process Medium ➜Temperature Compensation of Process Medium, p. 80 Concentration ➜Concentration (TAN Option FW-E009), p. 80 TDS Enable/disable TDS function (“Total Dissolved Solids” that influence conductivity) USP Enable/disable USP function for monitoring ultrapure water and set the USP limit. ➜USP Function, p. 81 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 82 5.9.1 Sensor Data Memosens sensors provide relevant sensor data automatically. The sensor type must be selected if using analog sensors: Parameter Setting [II] Analog … Sensor Data Sensor Data Sensor Type 2-El. Sensor Back 1.000 /cm Nom. Cell Constant II Back to Meas. Temperature Detection On Sensoface Off Sensocheck 01. Select sensor type. 02. Enter the sensor’s nominal cell constant. 03. In Temperature Detection , select the used temperature probe and whether the temperature is to be measured automatically or manually during measurement and/or calibration.

78 Sensoface The Sensoface icons provide the user with diagnostic information on wear and required maintenance of the sensor. In measuring mode, an icon (happy, neutral, or sad smiley) is shown on the display to reflect the continuous monitoring of the sensor parameters. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. Parameter Setting Inputs and Outputs Current Outputs Current Output I… Behavior during Messages The Sensoface message can also be output via a relay contact: Parameter Setting Inputs and Outputs Relay Contacts  Contact K… ➜Usage: Sensoface, p. 60 Sensoface monitors the conductivity sensor on the basis of the following parameters: Cell constant, polarization (if Sensocheck is enabled) With Memosens sensors, also: Number of CIP and SIP cycles compared to the specified “Sensor Moni- toring Details”. Enabling/Disabling Sensoface Sensoface is enabled and disabled in the Sensor Data submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Note: After a calibration, a smiley is always displayed for confirmation, even if Sensoface is disabled. Adjusting Sensor Monitoring Note: This function is not available for analog sensors. 01. Open Sensor Data Sensor Monitoring Details . 02. Open a sensor parameter, e.g., Cell Constant . 03. Set Monitoring of the cell constant to automatic or individual. 04. If you select “Individual”: The nominal cell constant and the min/max limits can be entered. 05. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Maintenance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. 06. Set the sensor monitoring details for further sensor data, e.g., Sensocheck, sensor operating time, or CIP/SIP counter. 07. Using the left softkey: Back, confirm the sensor monitoring settings and adjust further parameters. or Using the right softkey: Back to Meas., confirm the sensor monitoring settings and end the func- tion check (HOLD).

79 CIP/SIP Counters Note: This function is not available for all sensor types. CIP/SIP cycles are used to clean or sterilize process-wetted parts in the process. Depending on the ap- plication, either one chemical (alkaline solution, water) or several chemicals (alkaline solution, water, acidic solution, water) are used. • CIP temperature > 55 °C/131 °F • SIP temperature > 115 °C/239 °F The cleaning (cleaning in place) and sterilization (sterilization in place) cycles are counted to measure the load on the sensor, e.g., in biotechnology applications. Note: If measurements are generally taken at high temperatures (> 55 °C/131 °F), the counters should be switched off. When a CIP/SIP counter is switched on, a maximum number of cycles can be entered. As soon as the counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. Note: A CIP or SIP cycle is only entered into the logbook 2 hours after the start to ensure that the cycle is complete. Note: With Memosens sensors, an entry is also made in the sensor. Settings can be changed in the Sensor Monitoring Details submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Sensor Monitoring Details 5.9.2 Calibration Presettings The calibration presettings can be defined in the parameter settings or adjusted directly in the Calibra- tion menu prior to the calibration. Calibration mode: Presetting of calibration mode, e.g., automatic, manual, product calibration, data entry, temperature Further options are available depending on the calibration mode. Automatic: • Select calibration solution (NaCl/KCl) Product calibration: • Product calibration with/without temperature compensation Cal Presettings (Admin.) Product Calibration Back Calibration Mode Conductivity Product Wi II Conductivity Automatic Manual Product Data Entry Temperature Calibration presettings can be changed in the Cal Presettings submenu: Parameter Setting [I] [II] … Cond Cal Presettings

80 5.9.3 Temperature Compensation of Process Medium Note: If temperature compensation of the process medium is enabled, “TC” is shown on the display in measuring mode. The following are available for temperature compensation: • Off • Linear (enter temperature coefficient TC) • EN 27888 (natural waters) • Ultrapure water (with different trace impurities) Trace impurities in ultrapure water NaCl Neutral ultrapure water, for conductivity measurement in water processing downstream of gravel bed filter HCl Acidic ultrapure water, for conductivity measurement downstream of cation filter NH3 Ammoniacal ultrapure water NaOH Alkaline ultrapure water Settings can be changed in the TC Process Medium submenu: Parameter Setting [I] [II] … Cond TC Process Medium 5.9.4 Concentration (TAN Option FW-E009) With TAN option FW-E009, the substance concentration in percent by weight (wt%) can be determined for H2SO4, HNO3, HCl, NaOH, NaCl, and Oleum from the measured conductivity and temperature values. A custom solution can also be specified. The menu is only shown if the TAN option is activated. Parameter Setting [I] [II] … Cond(I) Concentration See also ➜Concentration Determination (FW-E009), p. 201

81 5.9.5 USP Function Monitoring Ultrapure Water in the Pharmaceutical Industry The conductivity of ultrapure water in the pharmaceutical industry can be monitored online in accordance with the guideline “USP” (U.S. Pharmacopeia), Annex 5, Section 645 “Water Conductivity”. The conductivity is measured without temperature compensation and is compared with limits. The water is usable without any further testing when the conductivity is below the USP limit. Configuring the USP Function The USP value can be configured as a process variable USP% for output (display, current output, limit, measurement recorder) Settings can be changed in the USP submenu: Parameter Setting [I] [II] … Cond(I) USP Reduced limit: The USP limit can be reduced down to 10 %. Monitoring: Select whether and how an exceeded limit is to be displayed. Off No message, but the parameter is still shown in the Diagnostics menu. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Mainte- nance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. USP Function: Specifying a Relay Contact The USP function can also be assigned to a relay contact: Parameter Setting Inputs and Outputs Relay Contacts Contact K… ➜Usage: USP Output, p. 60 Display of the USP Function in the Diagnostics Menu Diagnostics [I] [II] … Cond(I) USP Function Display of the USP limit, the reduced limit, and conductivity.

82 5.9.6 Messages All values determined by the measuring module or sensor can generate messages. Messages can be configured for the following process variables: • Conductivity • Resistivity • Concentration (with TAN option FW-E009) • Temperature • Salinity Configuring Messages Process variable limits for the monitoring range can be selected in the Messages submenu: Menu Selection Parameter Setting [I] [II] [Sensor] Messages Messages [Process Variable] Monitoring • Max. Device Limits: Messages are generated when the process variable is outside the measuring range. The “failure” or “out of specification” icons are shown; the corresponding relay contact is en- abled. The current outputs can signal a 22-mA message (user-defined). • Variable Limits: Upper and lower limits at which a message is generated can be defined for the “failure” and “out of specification” messages. Displaying Messages Go to the Diagnostics menu if the “failure”, “maintenance required”, or “out of specification” icons are flashing on the display. Menu Selection Diagnostics Message List All active messages are displayed in the “Message List” menu item with the following information: Er- ror number, type (failure, maintenance required, out of specification), channel, message text. You can scroll forward and backward using the up/down arrow keys. The error message disappears from the display around 2 s after the error is cleared. An overview of message texts with notes on troubleshooting can be found in the “Troubleshooting” chapter. ➜Malfunction States, p. 136

83 5.10 Process Variable Conductivity (Inductive) Note: Function check (HOLD) is active. Note: After changing the process variable or measuring mode, Stratos Multi retains its settings but needs to be reconfigured. Selecting a Digital Toroidal Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of toroidal Memosens conductivity sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or Conductivity (Induct.) Mode: Memosens Functionality: CondI Selection of an SE680 toroidal digital conductivity sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or Conductivity (Induct.) Mode: Other Digital Functionality: SE680K Selecting a Second Digital Toroidal Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a second Memosens toroidal conductivity sensor connected to the MK-MS 095N measuring module: Module: MK-MS Parameter: Conductivity (Induct.) Mode: Memosens Functionality: CondI Selection of a second SE680 digital toroidal conductivity sensor connected to the MK-MS 095N measuring module: Module: MK-MS Parameter: Conductivity (Induct.) Mode: Other Digital Adjustable parameters for digital or Memosens sensors for toroidal conductivity Parameter Setting [I] [II] Digital/Memosens CondI Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 85 Sensoface Enable/disable display of the Sensoface icon. With the SE680 sensor: Sensocheck Monitoring of primary and secondary coils. Enable or disable Sensocheck to generate failure or main- tenance required messages. With Memosens: Sensor Monitoring Details Option to enter individual limits for monitoring the cell factor. Sensocheck: Monitoring of primary and secondary coils. Enable or disable Sensocheck to generate failure or main- tenance required messages. Option to enter individual limits before a message for SIP counter, CIP counter, and sensor operating time is trig- gered.

84 Adjustable parameters for digital or Memosens sensors for toroidal conductivity Parameter Setting [I] [II] Digital/Memosens CondI Cal Presettings Presetting of calibration mode with corresponding parameters. ➜Calibration Presettings, p. 86 TC Process Medium Temperature compensation of process medium. Concentration ➜Concentration (TAN Option FW-E009), p. 87 TDS Enable/disable TDS function (“Total Dissolved Solids” that influence conductivity) USP Enable/disable USP function for monitoring ultrapure water and set the USP limit. ➜USP Function, p. 87 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 88 Selecting an Analog Toroidal Conductivity Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a toroidal conductivity sensor connected to the MK-CONDI035N measuring module: Module: MK-CONDI Mode: Analog Adjustable parameters for analog toroidal conductivity sensors Parameter Setting [II] Analog CondI Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 85 Sensor Type Select the used sensor type: SE655, SE656, SE660, ISC40, ISC40S, 5000 TC, other If you select “Other”, please enter further sensor data. Sensoface Enable/disable display of Sensoface messages and icons. Sensocheck Monitoring of primary and secondary coils. Enable or dis- able Sensocheck to generate failure or maintenance re- quired messages. Temperature Detection Select temperature probe, set measuring and calibration temperature. Cal Presettings Presetting of calibration mode with corresponding parameters. ➜Calibration Presettings, p. 86 TC Process Medium Temperature compensation of process medium. Concentration ➜Concentration (TAN Option FW-E009), p. 87 TDS Enable/disable TDS function (“Total Dissolved Solids” that influence conductivity) USP Enable/disable USP function for monitoring ultrapure water and set the USP limit. ➜USP Function, p. 87 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 88

85 5.10.1 Sensor Data Memosens sensors provide relevant sensor data automatically. The sensor type must be selected if using analog sensors: Parameter Setting [II] Analog … Sensor Data Sensor Data Sensor Type Other Back F0031 Sensor Coding II Back to Meas. On Sensoface Off Sensocheck 1.980 /cm Nom. Cell Factor 100.00 Transfer Ratio 01. Select sensor type 02. Enter the sensor coding, nominal cell factor, and transfer ratio. 03. In Temperature Detection , select the used temperature probe and whether the temperature is to be measured automatically or manually during measurement and/or calibration. Note: The sensor coding for unknown sensor types can be requested from Knick (see the back page of this document for contact details) Sensoface The Sensoface icons provide the user with diagnostic information on wear and required maintenance of the sensor. In measuring mode, an icon (happy, neutral, or sad smiley) is shown on the display to reflect the continuous monitoring of the sensor parameters. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. Parameter Setting Inputs and Outputs Current Outputs Current Output I… Behavior during Messages The Sensoface message can also be output via a relay contact: Parameter Setting Inputs and Outputs Relay Contacts  Contact K… ➜Usage: Sensoface, p. 60 Sensoface monitors the toroidal conductivity sensor on the basis of the following parameters: Cell factor, zero point, and, if Sensocheck is enabled: Primary/secondary coils and wires With Memosens sensors, also: Number of CIP and SIP cycles compared to the specified “Sensor Monitoring Details”. Enabling/Disabling Sensoface Sensoface is enabled and disabled in the Sensor Data submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Note: After a calibration, a smiley is always displayed for confirmation, even if Sensoface is disabled. Adjusting Sensor Monitoring Note: This function is not available for analog sensors. 01. Open Sensor Data Sensor Monitoring Details . 02. Open a sensor parameter, e.g., Cell Constant . 03. Set Monitoring of the cell constant to automatic or individual. 04. If you select “Individual”: The nominal cell constant and the min/max limits can be entered.

86 05. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Maintenance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. 06. Set the sensor monitoring details for further sensor data, e.g., Sensocheck, sensor operating time, or CIP/SIP counter. 07. Using the left softkey: Back, confirm the sensor monitoring settings and adjust further parameters. or Using the right softkey: Back to Meas., confirm the sensor monitoring settings and end the func- tion check (HOLD). CIP/SIP Counters Note: This function is not available for all sensor types. CIP/SIP cycles are used to clean or sterilize process-wetted parts in the process. Depending on the ap- plication, either one chemical (alkaline solution, water) or several chemicals (alkaline solution, water, acidic solution, water) are used. • CIP temperature > 55 °C/131 °F • SIP temperature > 115 °C/239 °F The cleaning (cleaning in place) and sterilization (sterilization in place) cycles are counted to measure the load on the sensor, e.g., in biotechnology applications. Note: If measurements are generally taken at high temperatures (> 55 °C/131 °F), the counters should be switched off. When a CIP/SIP counter is switched on, a maximum number of cycles can be entered. As soon as the counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. Note: A CIP or SIP cycle is only entered into the logbook 2 hours after the start to ensure that the cycle is complete. Note: With Memosens sensors, an entry is also made in the sensor. Settings can be changed in the Sensor Monitoring Details submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Sensor Monitoring Details 5.10.2 Calibration Presettings The calibration presettings can be defined in the parameter settings or adjusted directly in the Calibration menu prior to the calibration. Calibration mode: Presetting of calibration mode, e.g., automatic, manual, product calibration, zero point, installation factor, data entry, temperature Further options are available depending on the calibration mode. Automatic: • Select calibration solution (NaCl/KCl) Product calibration: • Product calibration with/without temperature compensation

87 Cal Presettings (Admin.) Product Calibration Back Calibration Mode Conductivity Product Wi II Conductivity Automatic Manual Product Zero Point Data Entry Calibration presettings can be changed in the Cal Presettings submenu: Parameter Setting [I] [II] … Condl Cal Presettings 5.10.3 Concentration (TAN Option FW-E009) With TAN option FW-E009, the substance concentration in percent by weight (wt%) can be deter- mined for H2SO4, HNO3, HCl, NaOH, NaCl, and Oleum from the measured conductivity and temperature values. A custom solution can also be specified. The menu is only shown if the TAN option is activated. Parameter Setting [I] [II] … Cond(I) Concentration See also ➜Concentration Determination (FW-E009), p. 201 5.10.4 USP Function Monitoring Ultrapure Water in the Pharmaceutical Industry The conductivity of ultrapure water in the pharmaceutical industry can be monitored online in accor- dance with the guideline “USP” (U.S. Pharmacopeia), Annex 5, Section 645 “Water Conductivity”. The conductivity is measured without temperature compensation and is compared with limits. The water is usable without any further testing when the conductivity is below the USP limit. Configuring the USP Function The USP value can be configured as a process variable USP% for output (display, current output, limit, measurement recorder) Settings can be changed in the USP submenu: Parameter Setting [I] [II] … Cond(I) USP Reduced limit: The USP limit can be reduced down to 10 %. Monitoring: Select whether and how an exceeded limit is to be displayed. Off No message, but the parameter is still shown in the Diagnostics menu. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Mainte- nance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. USP Function: Specifying a Relay Contact The USP function can also be assigned to a relay contact: Parameter Setting Inputs and Outputs Relay Contacts Contact K… ➜Usage: USP Output, p. 60 Display of the USP Function in the Diagnostics Menu Diagnostics [I] [II] … Cond(I) USP Function Display of the USP limit, the reduced limit, and conductivity.

88 5.10.5 Messages All values determined by the measuring module or sensor can generate messages. Messages can be configured for the following process variables: • Conductivity • Resistivity • Concentration (with TAN option FW-E009) • Temperature • Salinity Configuring Messages Process variable limits for the monitoring range can be selected in the Messages submenu: Menu Selection Parameter Setting [I] [II] [Sensor] Messages Messages [Process Variable] Monitoring • Max. Device Limits: Messages are generated when the process variable is outside the measuring range. The “failure” or “out of specification” icons are shown; the corresponding relay contact is en- abled. The current outputs can signal a 22-mA message (user-defined). • Variable Limits: Upper and lower limits at which a message is generated can be defined for the “failure” and “out of specification” messages. Displaying Messages Go to the Diagnostics menu if the “failure”, “maintenance required”, or “out of specification” icons are flashing on the display. Menu Selection Diagnostics Message List All active messages are displayed in the “Message List” menu item with the following information: Er- ror number, type (failure, maintenance required, out of specification), channel, message text. You can scroll forward and backward using the up/down arrow keys. The error message disappears from the display around 2 s after the error is cleared. An overview of message texts with notes on troubleshooting can be found in the “Troubleshooting” chapter. ➜Malfunction States, p. 136

89 5.11 Dual Conductivity Measurement Analog 2-Channel Conductivity Measurement with the MK-CC065N Measuring Module The module can operate with two 2-electrode conductivity sensors, each with a Pt1000 temperature probe. Select the MK-CC065N measuring module: Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Module: MK-CC Mode: Analog Menu Parameter Setting [II] Analog Cond-Cond Analog Cond-Cond (Admin.) Back Analog Cond Back to Meas. Analog Cond II IIA IIB Parameter setting ➜Process Variable Conductivity (Contacting), p. 77 2-Channel Conductivity Measurement with Memosens Sensors A 2-channel conductivity measurement can also be performed with two Memosens sensors or one Memosens and one analog sensor. In this case, a Memosens sensor is directly connected to the device, a second conductivity sensor via the MK-COND025N or MK-MS095N modules. Parameter setting ➜Process Variable Conductivity (Contacting), p. 76 Calculation Blocks (TAN Option FW-E020) With TAN option FW-E020, “Calculation Blocks”, the measured conductivity values can be converted into new variables. ➜Calculation Blocks (FW-E020), p. 206 5.12 Process Variable Oxygen Note: Function check (HOLD) is active. Note: After changing the process variable or measuring mode, Stratos Multi retains its settings but needs to be reconfigured. Note: Oxygen measurements in low oxygen concentrations require TAN option FW-E015. Selecting a Memosens Oxygen Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of the Memosens oxygen sensor connected to the RS-485 interface (terminals 1 … 5): Parameter: Auto or oxygen Mode: Memosens Functionality: Amperometric

90 Selecting a Second Memosens Oxygen Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of a second Memosens oxygen sensor connected to the MK-MS 095N measuring module: Module: MK-MS Parameter: Oxygen Mode: Memosens Functionality: Amperometric Adjustable parameters for Memosens oxygen sensors Parameter Setting [I] [II] Memosens Oxy Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 92 Measure in Liquids, gases Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Option to enter individual limits for monitoring separate pa- rameters. Disable Sensocheck sensor monitoring or select whether Sensocheck should generate failure or maintenance required messages. Option to enter individual limits before a message for response time, sensor wear, sensor operating time, SIP counter is trig- gered. Cal Presettings Presetting of the calibration mode and calibration timer. ➜Calibration Presettings, p. 95 Pressure Correction Manual input of pressure during measurement and calibration. With TAN option FW-E051: automatic pressure correction by external pressure transmit- ter. ➜Pressure Correction, p. 95 Salinity Correction Salinity, chlorinity, conductivity ➜Salinity Correction, p. 96 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 96 Selecting an SE740 Optical Oxygen Sensor (LDO) Parameter Setting Sensor Selection [I] [II] Sensor Selection [I] Selection of the SE740 optical oxygen sensor connected to the RS-485 interface (terminals 1 … 6): Parameter: Auto or oxygen Mode: Other digital Functionality: SE740 Note: The voltage at terminal 6 (Power Out) is automatically set to 14 V when using the SE740 optical oxygen sensor. The Power Out menu item is not available. Adjustable parameters for the SE740 optical oxygen sensor Parameter Setting [I] Digital Oxy Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 92 Measure in Liquids, gases Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Select whether a failure or maintenance required message is triggered if the range of the Stern-Volmer constant and phase angle is exceeded. Disable Sensocheck sensor monitoring or select whether Sensocheck should generate failure or maintenance required messages. Option to enter individual limits before a message for sensor wear, sensor operating time, CIP counter, O2 measurement with CIP/SIP, autoclaving counter is triggered.

91 Adjustable parameters for the SE740 optical oxygen sensor Parameter Setting [I] Digital Oxy Cal Presettings Presetting of the calibration mode and calibration timer. ➜Calibration Presettings, p. 95 Pressure Correction Manual input of pressure during measurement and calibration. With TAN option FW-E051: automatic pressure correction by external pressure transmit- ter. ➜Pressure Correction, p. 95 Salinity Correction Salinity, chlorinity, conductivity ➜Salinity Correction, p. 96 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 96 Selecting an Analog Oxygen Sensor Parameter Setting Sensor Selection [I] [II] Sensor Selection [II] Selection of an oxygen sensor connected to the MK-OXY046N measuring module: Module: MK-OXY Mode: Analog Adjustable parameters for analog oxygen sensor Parameter Setting [II] Analog Oxy Input Filter Pulse Suppression Enable/disable suppression of interference pulses. Sensor Data ➜Sensor Data, p. 92 Measure in Liquids, gases Sensor Type Standard or other Temperature Probe NTC 22kΩ, NTC 30kΩ Sensor Polarization Automatic or individual If you select “Individual”, separate values for polarization can be entered during measurement and calibration. Membrane Compensation If “Other Sensor Type” is selected Sensoface Enable/disable display of Sensoface messages and icons. Sensor Monitoring Details Option to enter individual limits for monitoring zero point and slope. Disable Sensocheck sensor monitoring or select whether Sensocheck should generate failure or maintenance re- quired messages. Option to enter individual limits before a message for re- sponse time is triggered. Cal Presettings Presetting of the calibration mode and calibration timer. ➜Calibration Presettings, p. 95 Pressure Correction Manual input of pressure during measurement and calibration. With TAN option FW-E051: automatic pressure correction by external pressure transmit- ter. ➜Pressure Correction, p. 95 Salinity Correction Salinity, chlorinity, conductivity ➜Salinity Correction, p. 96 Messages Enable/disable messages for the separate process variables, or specify individual limits. ➜Messages, p. 96

92 5.12.1 Sensor Data Display Example for an Analog Oxygen Sensor Sensor Data (Admin.) Sensor Type Back Measure in Liquids Standard I Temperature Probe Sensor Polarization Polariz. During Meas Polariz. During Cal NTC 22kΩ Auto -675 mV -675 mV Liquids Gases 01. Select whether to measure in liquids or gases. 02. If measuring in gases: Enter the relative humidity of the process medium. 03. If using an analog sensor: Select the sensor type and the used temperature probe. 04. If using an analog sensor: Select whether the polarization voltage should be selected automati- cally or individually during measurement and calibration. Note: The preset polarization voltage of -675 mV is appropriate for most measurements. Settings can be changed in the Sensor Data submenu: Parameter Setting [I] [II] ... Oxy Sensor Data Sensoface The Sensoface icons provide the user with diagnostic information on wear and required maintenance of the sensor. In measuring mode, an icon (happy, neutral, or sad smiley) is shown on the display to re- flect the continuous monitoring of the sensor parameters. You can configure the current outputs so that a Sensoface message generates a 22-mA error signal. Parameter Setting Inputs and Outputs Current Outputs Current Output I… Behavior during Messages The Sensoface message can also be output via a relay contact: Parameter Setting Inputs and Outputs Relay Contacts  Contact K… ➜Usage: Sensoface, p. 60 Sensoface monitors the oxygen sensor for slope, zero point, response time, and sensor wear. Senso- face is displayed when Sensocheck has been enabled during parameter setting. Enabling/Disabling Sensoface Sensoface is enabled and disabled in the Sensor Data submenu: Parameter Setting [I] [II] [Sensor] Sensor Data Note: After a calibration, a smiley is always displayed for confirmation, even if Sensoface is disabled.

93 Adjusting Sensor Monitoring 01. Open Sensor Data Sensor Monitoring Details . 02. Open a sensor parameter, e.g., Slope . 03. Set Monitoring of the slope to automatic or individual. 04. If you select “Individual”: The nominal slope and the min/max limits can be entered. 05. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message, but the parameter is still shown on the sensor diagram. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Maintenance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. 06. Set the sensor monitoring details for other sensor data, e.g. zero point, Sensocheck, response time, sensor wear, or sensor operating time. 07. Using the left softkey: Back, confirm the sensor monitoring settings and adjust further parameters. or Using the right softkey: Back to Meas., confirm the sensor monitoring settings and end the func- tion check (HOLD). CIP/SIP Counters Note: A CIP counter is available for the SE740 oxygen sensor. An SIP counter is available for amperometric Memosens oxygen sensors. CIP/SIP cycles are used to clean or sterilize process-wetted parts in the process. Depending on the application, either one chemical (alkaline solution, water) or several chemicals (alkaline solution, water, acidic solution, water) are used. • CIP temperature > 55 °C/131 °F • SIP temperature > 115 °C/239 °F The cleaning (cleaning in place) and sterilization (sterilization in place) cycles are counted to measure the load on the sensor, e.g., in biotechnology applications. Note: If measurements are generally taken at high temperatures (> 55 °C/131 °F), the counters should be switched off. When a CIP/SIP counter is switched on, a maximum number of cycles can be entered. As soon as the counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. Note: A CIP or SIP cycle is only entered into the logbook 2 hours after the start to ensure that the cycle is complete. Note: With Memosens sensors, an entry is also made in the sensor.

94 O2 Measurement with CIP/SIP When using the SE740 optical oxygen sensor, the temperature can be monitored during the CIP/SIP process. When the preset cut-off temperature is exceeded, the sensor automatically stops the oxygen measurement to extend the life of the membrane. The measured oxygen value is frozen, the temperature continues to be measured. 01. Open Sensor Monitoring Details O2 Measurement with CIP/SIP . 02. Monitoring: Automatic or individual 03. If you select “Individual”: Enter the maximum cut-off temperature. 04. In the Message menu item, select whether and how an exceeded limit is to be displayed: Off No message, but the parameter is still shown on the sensor diagram. Failure A failure message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Maintenance A maintenance required message is shown in off-limit conditions; the corresponding NAMUR icon is displayed. Settings can be changed in the Sensor Monitoring Details submenu: Parameter Setting [I] [II] ... Oxy Sensor Data Sensor Monitoring Details Autoclaving Counter An autoclaving counter is available for the SE740 oxygen sensor. When the autoclaving counter is switched on, a maximum number of cycles can be entered. As soon as the autoclaving counter has reached the specified value, a maintenance required message is triggered and the NAMUR icon is displayed. After each autoclaving process, you must manually increment the autoclaving counter in the Maintenance menu. Maintenance [I] Digital Oxy Sensor Monitor Autoclaving Cycles

95 5.12.2 Calibration Presettings The calibration presettings can be defined in the parameter settings or adjusted directly in the Calibration menu prior to the calibration. Calibration mode: Presetting of calibration mode, e.g., in air, in water, data entry, product calibration, zero calibration, temperature If you select “Product Calibration” mode, you must also select the measured value: Saturation %air, concentration (gas), partial pressure Calibration timer: When a preset calibration interval expires, the calibration timer generates a mes- sage text to indicate the need for calibration. If “Auto” is selected, the interval is set to 720 h. If “Individual” is selected, you can select a custom interval. Cal Presettings (Admin.) Product Calibration Back Calibration Mode Calibration Timer Product Saturation II Sat. %Air Conc. (Liquid) Partial Pressure Settings can be changed in the Cal Presettings submenu: Parameter Setting [I] [II] … Oxy Cal Presettings Note: If Sensoface is enabled, a neutral smiley is displayed once 80 % of the interval has expired. Once the entire interval has expired, a sad smiley is shown, a maintenance required message is generated, and the corresponding NAMUR icon is displayed. If the current outputs are configured accordingly, a 22-mA error signal is generated. 5.12.3 Pressure Correction The pressure used for measurement or calibration can be manually specified (factory setting 1013 mbar). With TAN option FW-E051, “Current Input”, an external pressure transmitter can be connected to the current input (terminals 8 and 9). This enables automatic pressure correction. The start and end of the current input can be set in the ranges from 0/4 ... 20 mA. Settings can be changed in the Pressure Correction submenu: Parameter Setting [I] [II] ... Oxy Pressure Correction Setting Automatic Pressure Correction (TAN Option FW-E051) 01. Open the Ext. Pressure Transmitter submenu. 02. Select “Absolute” or “Differential” pressure transmitter. 03. Select current input 0 … 20 mA or 4 … 20 mA. 04. Enter pressure values for current start and current end 05. Use the left softkey: Back to return to the Pressure Correction submenu. 06. Select an external or manual pressure correction in Pressure during Meas. and Pressure during Cal .

96 5.12.4 Salinity Correction The solubility of oxygen in water depends on its salinity. The correction is made by either directly entering the salinity in g/kg, the chlorinity in g/kg, or the conductivity in μS/cm, and the temperature. Settings can be changed in the Salinity Correction submenu: Parameter Setting [I] [II] ... Oxy Salinity Correction 5.12.5 Messages All values determined by the measuring module or sensor can generate messages. Messages can be configured for the following process variables: • Saturation %air • Saturation %O2 • Concentration • Partial pressure • Temperature • Process pressure Configuring Messages Process variable limits for the monitoring range can be selected in the Messages submenu: Menu Selection Parameter Setting [I] [II] [Sensor] Messages Messages [Process Variable] Monitoring • Max. Device Limits: Messages are generated when the process variable is outside the measuring range. The “failure” or “out of specification” icons are shown; the corresponding relay contact is en- abled. The current outputs can signal a 22-mA message (user-defined). • Variable Limits: Upper and lower limits at which a message is generated can be defined for the “failure” and “out of specification” messages. Displaying Messages Go to the Diagnostics menu if the “failure”, “maintenance required”, or “out of specification” icons are flashing on the display. Menu Selection Diagnostics Message List All active messages are displayed in the “Message List” menu item with the following information: Er- ror number, type (failure, maintenance required, out of specification), channel, message text. You can scroll forward and backward using the up/down arrow keys. The error message disappears from the display around 2 s after the error is cleared. An overview of message texts with notes on troubleshooting can be found in the “Troubleshooting” chapter. ➜Malfunction States, p. 136

97 5.13 Flow Stratos Multi can calculate flow for limit messages or to monitor an ion exchanger. A pulse generator is connected to control input OK1 for this purpose. Parameter Setting Control input OK1 must first be assigned the “Flow” function. 01. Open System Control Function Control . 02. Input OK1: Select “Flow”. 03. 2x left softkey: Back 04. Open Inputs and Outputs Control Inputs Flow . 05. Enter the number of pulses per liter. 06. If required, enable monitoring of the minimum and maximum flow. The flow measurement can process up to 100 pulses per second at the signal input of control input OK1. Flow monitoring with a connected external flow transmitter Factory setting to generate a failure message Minimum flow 5 liters/h Maximum flow 25 liters/h The flow messages can activate a relay contact and/or trigger a 22-mA message via a current output (user-defined). 5.14 HART Communication (TAN Option FW-E050) Note: In order to use the TAN option FW-E050 HART with Stratos Multi, current output I1 must be set to 4 … 20 mA. HART communication is not possible below 4 mA. See also ➜Current Outputs, p. 55 ➜HART (FW-E050), p. 209

98 6 Calibration/Adjustment Menu Selection Back Calibration Lingua Note: During calibration, the function check (HOLD) operating state is active for each of the calibrated measuring channels. The outputs respond as configured. During calibration, Stratos Multi remains in calibration mode until stopped by personnel. When cali- bration mode is exited, a confirmation prompt is displayed to ensure that the system is ready for oper- ation again. Adjustment Adjustment involves the transfer of the calibration values obtained during calibration to Stratos Multi or the digital sensor. These calibration values are entered in the adjustment record of the Stratos Multi for the sensor, and directly in the sensor when using digital sensors: Menu Selection Diagnostics I/II [Sensor] Cal/Adj Record [Process Variable] NOTICE! Without adjustment, a measuring device will supply an imprecise or incorrect output value. For it to measure properly, Stratos Multi must be adjusted. When using analog sensors, adjustment is required following sensor replacement. Assigning passcodes helps to ensure that only specialist personnel with access rights are allowed to carry out calibrations and adjustments. The passcodes can be changed or disabled: Parameter Setting System Control Passcode Entry ➜Passcode Entry, p. 48 6.1 Memosens Calibration/Adjustment Menu Selection Calibration [I] [II] Memosens … Note: The calibration data are saved in the Memosens sensor. This means that Memosens sensors can be cleaned, reconditioned, calibrated, and adjusted away from the measurement location, e.g. in a lab- oratory. Sensors in the system are replaced on-site by adjusted sensors.

99 6.2 Process Variable pH Calibration/Adjustment Note: During calibration, the function check (HOLD) operating state is active for each of the calibrated measuring channels. The outputs respond as configured. • Calibration: Detect deviations without readjustment of calibration data • Adjustment: Detect deviations with readjustment of calibration data NOTICE! When using analog sensors, adjustment is required following sensor replacement. pH Calibration/Adjustment Explanations Each pH sensor has a separate zero point and a separate slope. Both values change as a result of aging and wear. The voltage supplied by the pH sensor is corrected by Stratos Multi for the zero point and the electrode slope of the pH sensor, and displayed as the pH value. During calibration, the sensor’s deviation is initially determined (zero point, slope). The sensor is immersed in buffer solutions with a precisely known pH value for this purpose. Stratos Multi measures the voltages of the sensors and the temperature of the buffer solution, using this information to calculate the sensor’s zero point and slope. Calibration values determined during calibration Zero Point The pH value at which the pH sensor supplies the voltage 0 mV. The zero point is different for each sensor and changes with age and wear. Slope The slope of a sensor is the voltage change per pH unit. With an ideal sensor, this is -59.2 mV/pH. Temperature The temperature of the process solution must be logged, since the pH measurement is tempera- ture-dependent. Many sensors feature an integrated temperature probe. There are limits that are calculated during calibration when monitoring glass and reference imped- ances. The following limits apply to standard glass electrodes: • Temperature range: 0 ... 80 °C/32 ... 176 °F • Impedance range: 50 ... 250 MΩ (at 25 °C/77 °F)

100 6.2.1 Calibration Methods One-Point Calibration The sensor is calibrated with just one buffer solution. A one-point calibration is useful and permissible if the measured values are close to the sensor zero point, such that the change in sensor slope is of negligible significance. The sensor’s zero point is subsequently adjusted, while the slope remains unchanged. Two-Point Calibration The sensor is calibrated with two buffer solutions. This makes it possible to calculate the sensor’s zero point and slope. The sensor’s zero point and slope are subsequently adjusted. A two-point calibration is required in the following cases, for example: • The sensor has been replaced • The pH measured value covers a large range • The pH measured value is far from the sensor zero point • The pH value needs to be determined with high precision • The sensor is subject to heavy wear 1 2 4 3 1 First point of first buffer solution 3 Recommended measuring range 2 Second point of second buffer solution 4 Result of ideal calibration at 25 °C/77 °F Three-Point Calibration The sensor is calibrated with three buffer solutions. The zero point and slope are calculated using a line of best fit in accordance with DIN 19268. The sen- sor’s zero point and slope are subsequently adjusted. 1 2 3 4 1 First point of first buffer solution 3 Third point of third buffer solution 2 Second point of second buffer solution 4 Rise