BEKA BA368E Manual 

3.1 ATEX gas certification 3.2 Zones, gas groups & T rating 3.3 Special conditions for safe use 3.4 Power supply 3.5 Pulse input terminals 3.5.1 sensors that do not require energising. 3.5.2 sensors that do require energising. 3.6 Remote reset terminals 3.7 Certification label information 4. System Design for Hazardous Areas 4.1 Use with Zener barriers 4.1.1 Power supply 4.1.2 Pulse input 4.1.3 Switch contact input 4.1.4 2-wire proximity detector input 4.1.5 Open collector 4.1.6 Magnetic pick-off input 4.1.7 Voltage pulse input 4.1.8 Remote reset 4.2 Use with galvanic isolators 4.2.1 Power supply 4.2.2 Pulse input 4.2.3 Switch contact input 4.2.4 2-wire proximity detector input 4.2.5 Open collector 4.2.6 Magnetic pick-off input 4.2.7 Voltage pulse input 4.2.8 Remote reset 5. Installation 5.1 Location 5.2 EMC 5.3 Installation procedure 5.4 Scale card 6. Configuration and Calibration 6.1 Calibration structure 6.2 Accessing configuration functions 6.3 Summary of configuration functions 6.4 Input A 6.5 Input A type 6.6 Input A debounce 6.7 Input b 6.8 Input b type 6.9 Input b debounce 6.10 Input A pulse counting edge 6.11 Input b pulse counting edge 6.12 Display update interval 6.13 Counting function 6.14 Upper display 6.15 Lower display 6.16 Position of decimal points 6.17 Total scale factor 6.18 Rate scale factor 6.19 Timebase 6.20 Display filter 6.21 Direction of count 6.22 Reset value 6.23 Local reset 6.24 Local total reset 6.25 Local grand total reset 6.26 Reset grand total from configuration menu. 6.27 Security code 6.28 Reset configuration to factory defaults 6.29 Display overflow 7. Pulse Output 7.1 Intrinsic safety 7.2 System design 7.3 Configuration 7.4 Access pulse output sub-menu 7.5 Enable pulse output 7.6 Source of output pulse 7.7 Divide output pulse frequency 7.8 Output pulse width 8. Configuration example 2 CONTENTS The BA368E is CE marked to show compliance with the European Explosive Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU

9.2 Fault finding after commissioning 9.3 Servicing 9.4 Routine maintenance 9.5 Guarantee 9.6 Customer comments 10. Accessories 10.1 Scale card 10.2 Tag information 10.3 Alarms 10.3.1 Solid state output 10.3.2 Intrinsic safety 10.3.3 Summary of configuration functions. 10.3.4 Alarm enable 10.3.5 Type of alarm 10.3.6 Setpoint adjustment 10.3.7 Alarm function 10.3.8 Alarm output status 10.3.9 Hysteresis 10.3.10 Alarm delay 10.3.11 Alarm silence time 10.3.12 Flash display when alarm occurs. 10.3.13 Access setpoint 10.3.14 Adjusting alarm setpoints from display mode. 10.4 Display backlight 10.5 4/20mA output 10.5.1 Intrinsic safety 10,5.2 System design 10.5.3 Configuration and calibration 10.5.4 Access 4/20mA output sub-menu 10.5.5 Enable 4/20mA output 10.5.6 Select rate or total source 10.5.7 Define display for 4mA output 10.5.8 Define display for 20mA output Appendix 1 IECEx certification Appendix 2 ETL & cETL certification 3

accept pulses on one or both inputs and may be configured to show one of the following in engineering units on an eight digit display: Input A + Input b Input A - Input b Input A direction controlled by Input b Quadrature input (Input A and Input b electrically 90o apart) A smaller six digit display may be activated to show the composite pulse rate in engineering units per second, minute or per hour. In addition to simple counting applications, the quadrature input allows direction of movement and position to be displayed. The optically-isolated pulse output may be configured to synchronously retransmit either of the two inputs or a scaled composite output. This instruction manual supplements the abbreviated instruction sheet supplied with each instrument. The BA368E has been certified intrinsically safe for use in gas hazardous areas by Notified Body Intertek Testing and Certification Ltd and complies with the European ATEX Directive 2014/34/EU. For international applications the BA368E also has IECEx certification which is described in Appendix 1. For applications in the USA and Canada the BA368E has ETL and cETL certification which is described in Appendix 2. 2. OPERATION Fig 1 shows a simplified block diagram of the BA368E Counter. The instrument has two inputs, A and b, which can be configured to accept pulses from most types of sensor and display the total number of pulses received and their combined rate on separate displays. Each input can be individually configured to accept pulses from a wide variety of sensors. When the sensor requires energising, such as a switch contact, open collector or a two wire proximity detector, an external link supplies power to the input terminals. The BA368E may be supplied with any of the following factory fitted accessories: Internally powered display backlight Dual isolated alarms Isolated 4/20mA output Fig 1 BA368E block diagram 2.1 Initialisation Each time power is applied to a BA368E Counter initialisation is performed. After a short delay the following display sequence occurs: All segments of the display are activated Counter starts functioning, using the configuration information stored in the instrument’s permanent memory. Unless total and grand total displays have been reset to zero, new pulses will be added to the existing totals. 4

via four front panel push buttons. In the display mode i.e. when the instrument is counting the push button functions are: Push Button Functions ) + & Grand total - shows Lo followed by least significant 8 digits of the 16 digit grand total. ) + * Grand total - shows Hi followed by the most significant 8 digits of the 16 digit grand total. If Local Grand Total Reset CLr Gtot in the instrument configuration menu has been activated, operating the ) and * buttons simultaneously for ten seconds will result in Clr . no being displayed with the no flashing. Operating the * or & button will change the display to Clr . YE5, the ) button will then reset the grand total to zero which will be confirmed by a brief display of Gt Clrd. See 6.25 & + * If Local Total Reset CLr tot in the instrument configuration menu has been activated, operating the & and * buttons simultaneously for three seconds will reset the total display to zero and clear any pulses stored in the pulse output. See 6.24 ( + & Shows firmware version ( + ) Access to configuration menu Note: When optional alarms are fitted, the BA368E Counter may be configured to provide direct access to the alarm setpoints from the display mode when the ( and * buttons are operated simultaneously. See 10.3.13 and 10.3.14 2.3 Displays The BA368E Counter has two digital displays and associated annunciators, plus a pulse input indicator as shown on the front cover of this manual. Total Shows the total pulse count on the display upper eight digit display. May be reset to zero via front panel push buttons or by a remote reset switch. Rate Shows the pulse rate on the lower six Display digit display. Total and rate displays may be reversed. Pulse input This disc in the lower left hand corner indicator of the display 'rotates' for two seconds each time an input pulse is received on either input. Appears to rotate continuously when combined input frequency on both inputs exceeds 0.5Hz. Reset Activated while the total display annunciator is being reset via the front panel push buttons, or the external reset terminals. Rate Identifies rate display annunciator Total Identifies total display annunciator RTx Retransmitted pulse annunciator annunciator. Depends upon the setting of 5ource in the pulse output configuration menu. 5caled: Annunciator activated each time pulse output open collector is on, i.e. Ron is less than 60Ω + 3V. direct: Annunciator continuously activated. 5

The BA368E Counter has ATEX and IECEx gas certification. This section of the instruction manual describes ATEX gas certification. IECEx and other approvals are each described in separate appendixes to this manual. 3.1 ATEX gas certification Notified Body Intertek Testing and Certification Ltd have issued the BA368E with an EC-Type Examination Certificate number ITS16ATEX28408X. This confirms compliance with harmonised European standards and it has been used to confirm compliance with the European ATEX Directive for Group II, Category 1G equipment. The Counter carries the community mark and subject to local codes of practice may be installed in any of the European Economic Area (EEA) member countries. ATEX certificates are also acceptable for installations in Switzerland. This section of the instruction manual describes ATEX installations in explosive gas atmospheres conforming with EN60079-14 Electrical Installations in Hazardous Areas. When designing systems for installation outside the UK the local Code of Practice should be consulted. 3.2 Zones, gas groups and T rating The BA368E Counter has been certified Ex ia IIC T5 Ga -40ºC ≤ Ta ≤ +70ºC. When connected to a suitable system it may be installed in: Zone 0 explosive gas air mixture continuously present. Zone 1 explosive gas air mixture likely to occur in normal operation. Zone 2 explosive gas air mixture not likely to occur, and if it does will only exist for a short time. Be used with gases in groups: Group A propane Group B ethylene Group C hydrogen Having a temperature classification of: T1 450°C T2 300°C T3 200°C T4 135°C T5 100°C At ambient temperatures between -40 and +70°C. The specified operating temperature of the BA368E Counter is -40 to +70°C. At temperatures below - 20°C the instrument will continue to count, but the display digits will change increasingly slowly and the contrast will be reduced. This allows the BA368E Counter to be installed in all gas Zones and to be used with most common industrial gases except carbon disulphide and ethyl nitrite which have an ignition temperature of 95°C. 3.3 Special conditions for safe use The ATEX certificate has an ‘X’ suffix indicating that special conditions apply to prevent an electrostatic charge developing on the outside of the instrument enclosure. WARNING To avoid an electrostatic charge being generated instrument enclosure should only be cleaned with a damp cloth. 3.4 Power supply When installed in a hazardous area the BA368E Counter should be powered via a certified Zener barrier or galvanic isolator from a dc supply located in the safe area, or from associated apparatus with an intrinsically safe output. The input safety parameters of terminals 1 and 2 are: Ui = 28V dc Ii = 200mA dc Pi = 0.84W Any certified Zener barrier or galvanic isolator with output safety parameters equal to or less than these limits may be used. The maximum equivalent capacitance and inductance between terminals 1 and 2 is: Ci = 2nF Li = 4µH To determine the maximum permissible cable parameters the above figures, which are small and may be ignored in many applications, should be subtracted from the maximum permitted cable parameters specified for the Zener barrier or galvanic isolator powering the BA368E Counter. 6

The BA368E Counter has two pulse inputs, A and b, that may be individually configured for use with most types of sensor. Each input is a separate intrinsically safe circuit, although the negative side of each input is internally connected to the negative side of the power supply and reset terminal RS2. See Fig 1. The two inputs should not be connected in parallel. Some types of sensor that may be connected to the BA368E inputs, such as a switch contact or a 2-wire proximity detector, require energising to determine their state. For sensors requiring energising fitting an external link between terminals 3 & 4 of the BA368E for input A and between terminals 7 & 8 for input b, connects an internal 7V, 6mA supply to the respective input. Energising is not required when a BA368E input is connected to a voltage source. Fitting an energising link changes the output safety parameters of each BA368E input as shown in the following table which also shows the types of sensor requiring energising (link fitting). Output safety parameters of each input. Type of input Link* Uo Io Po Switch contact Yes 10.5V 9.2mA 24mW Proximity detector Yes 10.5V 9.2mA 24mW Open collector Yes 10.5V 9.2mA 24mW Magnetic pick-off No 1.1V 0.5mA 0.2mW Voltage input (low) No 1.1V 0.5mA 0.2mW Voltage input (high) No 1.1V 0.5mA 0.2mW *For input A link terminals 3 and 4 *For input b link terminals 7 and 8 3.5.1 sensors that do not require energising Magnetic pick-offs and voltage pulse inputs do not require energising, see section 3.5. For intrinsic safety purposes, sources of energy with output parameters less than 1.5V; 100mA and 25mW are considered to be simple apparatus (Clause 5.7 of EN60079-11), which allows them to be ignored and not documented when assessing an intrinsic safe system. When terminals 3 & 4 and terminals 7 & 8 are not linked, the associated BA368E Counter input complies with the requirements for simple apparatus. This allows the output parameters of the pulse input to be ignored when assessing the safety of the sensor connected to a Counter. This allows almost any certified intrinsically safe voltage pulse or certified magnetic pick-off to be directly connected to one of the BA368E Counter inputs. The BA368E EC-Type Examination Certificate specifies that the equivalent capacitance and inductance of each BA368E Counter input are: Ci = 2nF Li = 4H To determine the maximum permissible cable parameters these figures should be subtracted from the maximum permitted cable parameters specified for the sensor connected to the input terminals of the Counter. However, the Counter input parameters are very small and they are unlikely to make any significant difference to the allowable cable parameters. 3.5.2 sensors that require energising Switch contacts, proximity detectors and open collector inputs require energising as described in section 3.5. When energised, the output parameters of each BA368E Counter input are: Uo = 10.5V Io = 9.2mA Po = 24mW These parameters do not comply with the requirements for simple apparatus and should be included when assessing the safety of the circuits connected to the inputs of the BA368E Counter. Any certified intrinsically safe sensor or simple apparatus may be connected to an energised BA368E Counter input providing that the sensor's input parameters are equal to, or greater than, the output safety parameters of the BA368E Counter input which are shown above. This is not restrictive and most sensors will comply. This allows most mechanically operated switch contacts, open collector transistors and certified intrinsically safe NAMUR proximity detectors to be directly connected to a BA368E Counter input providing the sensor and associated wiring can withstand a 500V rms insulation test to earth and both are located within the same hazardous area as the Counter. The maximum capacitance and inductance that may be safely connected to each Counter input when energised (link connected) is: Co = 2.4µF Lo = 200mH Again this is not restrictive and most sensors will comply. 7

The BA368E Counter may be reset to zero by connecting the reset terminals RS1 and RS2 together for more than one second. These two terminals have the following input and output safety parameters: Uo = 3.8V Io = 1mA Po = 1mW Ui = 28V dc Ii = 200mA dc Pi = 0.84W The equivalent capacitance and inductance between them is: Ci = 0nF Li = 0H The maximum capacitance and inductance that may be safely connected between the reset terminals RS1 and RS2 is: Co = 40µF Lo = 1H The total Counter display may be reset to zero from within the hazardous area by any mechanically operated switch contact connected directly to terminals RS1 and RS2. To reset the total display from the safe area a Zener barrier or intrinsically safe relay is required to transfer the contact closure into the hazardous area. Almost any intrinsically safe relay with certification permitting the contacts to be connected to equipment in the hazardous area may be used. A positive polarity Zener barrier may also be used as shown in Fig 2. Alternatively, the BA368E Counter may be configured so that the total display is reset to zero when the & and * push buttons are operated simultaneously for more than three seconds. See 6.24. 3.7 Certification label information The certification information label is fitted in a recess on the top outer surface of the enclosure. It shows the ATEX and IECEx certification information, plus BEKA associates name and location and the instrument serial number. Non European certification information may also be included. BA368E Certification information label 8

4.1 Use with Zener barriers Zener barriers are the least expensive intrinsically safe interface between a safe and hazardous area. However they require a high integrity earth connection that may be expensive to install and they do not provide isolation. When a high integrity earth connection is not already available, it may be less expensive and complicated to use galvanic isolators for the installation of a single BA368E Counter. Terminals 2, 6, 10 and RS2 of the BA368E Counter are internally connected together. If any of these terminals are earthed, as shown in Figs 2 & 3, the other terminals should only be connected to the same earth, i.e. the barrier busbar, or to circuits that have 500V insulation to earth. Any certified Zener barriers may be used with the BA368E Counter providing their output parameters do not exceed the input parameters of the terminals to which they are connected. Only one polarity of Zener barrier i.e. positive or negative, may be used in each Counter system. Fig 2 illustrates the basic circuit that is used for all BA368E Counter installations protected by Zener barriers. For simplicity, connections for the pulse output and the optional alarms and 4/20mA output are shown separately in sections 7 and 10 of this manual. Fig 2 BA368E used with Zener barriers Alternatively the pulse source may be located in the safe area. Fig 3 shows how an additional Zener barrier is used to transfer the signal to the Counter in the hazardous area. When more than one Zener barrier is used in a system all must have the same polarity. i.e. all positive or all negative barriers. When designing a system it is important to remember that terminals 2, 6, 10 and RS2 are interconnected within the BA368E See Fig 1. Fig 3 BA368E used with Zener barriers pulse source in safe area. 4.1.1 Power supply The BA368E Counter requires a minimum of 10V between terminal 1 & 2 and consumes: 10mA without optional backlight plus 16mA for optional backlight plus 6mA when terminals 3 & 4 are linked plus 6mA when terminals 7 & 8 are linked Any certified Zener barrier may be used to power a BA368E Counter providing the output safety parameters of the barrier are equal to or less than the input safety parameters of terminals 1 & 2 of the BA368E Counter. Although this allows a wide variety of barriers to be used, a positive polarity 28V; 93mA; 300 Zener barrier, which has an end-to-end resistance of about 340, is an industry standard device which is frequently used. With this barrier the supply voltage in the safe area, with both counter inputs energised, must be between 17.5V and the maximum working voltage of the Zener barrier which, depending upon manufacturer, will be approximately 26V. The minimum voltage increases to 23V if a display backlight is fitted. 9

As shown in Fig 2 the BA368E can count pulses from a wide variety of sensors in the hazardous area, or from the safe area as shown in Fig 3. No Zener barrier is required in series with each input if the intrinsically safe pulse source is located within the same hazardous area as the BA368E Counter. The following table shows the switching thresholds for the various types of sensor. For reliable counting the pulse input must fall below the lower threshold and rise above the upper threshold. Input sensor Switching thresholds Lower Upper Switch 100 1000 Proximity detector 1.2mA 2.1mA Open collector 2k 10k Magnetic pick-off 0mV 40mV peak Voltage pulse low 1.0V 3.0V Voltage pulse high 3.0V 10.0V 4.1.3 Switch contact input Any mechanically activated switch contact located in the same hazardous area as the BA368E Counter may be directly connected to the pulse input terminals 5 & 6 and 9 & 10 providing the switch and associated wiring can withstand a 500V rms insulation test to earth. Most magnetically activated reed relays comply with these requirements. The BA368E contains a configurable debounce circuit to prevent contact bounce being counted. See section 6.6 for details of the maximum counting frequency. 4.1.4 2-wire proximity detector input Most certified intrinsically safe 2-wire proximity detectors complying with NAMUR switching thresholds may be connected to the BA368E Counter inputs, providing the input safety parameters of the proximity detector are equal to or greater than the output safety parameters of the Counter inputs i.e. Ui ≥ 10.5V dc Ii ≥ 9.2mA dc Pi ≥ 24mW and the minimum operating voltage of the proximity detector is less than 7.5V. See section 6.6 for details of the maximum counting frequency. 4.1.5 Open collector input Most open collector sensors located in the same hazardous area as the BA368E Counter may be directly connected to pulse input terminals 5 & 6 and 9 & 10 providing the sensor and associated wiring can withstand a 500V rms insulation test to earth. The open collector device must comply with the requirements for simple apparatus or have input safety parameters equal to or greater than: Ui ≥ 10.5V dc Ii ≥ 9.2mA dc Pi ≥ 24mW See section 6.6 for details of the maximum counting frequency. 4.1.6 Magnetic pick-off input CoiL in the input configuration menu is a low level voltage pulse input intended for use with magnetic pick-off sensors producing an ac output. For a CoiL input the pulse input terminals 5 & 6 and 9 & 10 of the BA368E Counter comply with the requirements of simple apparatus allowing connection to any certified intrinsically safe magnetic pick-off within the hazardous area having output parameters equal to or less than: Uo ≤ 28V dc Io ≤ 200mA dc Po ≤ 0.84W The maximum permitted cable parameters will be defined by the magnetic pick-off’s intrinsic safety certificate less the Counters input parameters Ci & Li which are small and can often be ignored, See section 6.6 for details of the maximum counting frequency. 4.1.7 Voltage pulse input Two voltage pulse input ranges are selectable in the configuration menu, VoLt5 L and VoLt5 H. When configured for either of the voltage pulse ranges, the pulse input terminals 5 & 6 and 9 & 10 of the BA368E Counter comply with the requirements of simple apparatus allowing connection to any intrinsically safe voltage source within the hazardous area having output parameters equal to or less than: Uo ≤ 28V dc Io ≤ 200mA dc Po ≤ 0.84W The maximum permitted cable parameters will be defined by the voltage source intrinsic safety certificate less the BA368E Counter input parameters which are small and can often be ignored. See section 6.6 for details of the maximum counting frequency. 10

The BA368E Counter total display may be remotely reset to zero by connecting terminals RS1 & RS2 together for more than one second. Permanent interconnection inhibits counting. Remote resetting may be accomplished by any mechanically operated switch located in the same hazardous area as the Counter providing it and the associated wiring can withstand a 500V rms insulation test to earth. No Zener barrier is required. A BA368E may also be remotely reset to zero from the safe area. Any switch may be used but a Zener barrier is required to transfer the contact closure into the hazardous area which may be combined with the supply barrier so that only one package is required. A diode return barrier is not suitable for this application. Fig 2 illustrates how the BA368E total display may be reset from both the safe and the hazardous area. Note: The BA368E can be configured to reset the total display to zero when the & and * push buttons are operated simultaneously for more than three seconds - see 6.24. 4.2 Use with Galvanic Isolators Galvanic isolators are probably the simplest intrinsically safe interface to install as they provide isolation and do not require a high integrity earth connection. Any certified galvanic isolator with output parameters less than the input parameters of the BA368E having the correct function may be used. Fig 4 BA368E protected by galvanic isolators. Fig 4 illustrates the basic circuit that is used for all BA368E Counter installations protected by galvanic isolators. For simplicity, connections for the pulse output and the optional factory fitted alarms and 4/20mA output are shown separately in section 7 and 10 of this manual. Alternatively the pulse source may be located in the safe area. Fig 5 shows how an additional galvanic isolator is used to transfer the signal to the BA368E Counter in the hazardous area, although it may be difficult to find isolators for some sensors. 11

4.2.1 Power supply The BA368E Counter requires a minimum of 10V between terminal 1 & 2 and consumes 10mA plus 6mA for each input that is energised, a maximum total of 22mA if both inputs are energised. Any certified galvanic isolator may be used to power a BA368E Counter providing the output safety parameters of the isolator are equal to or less than the input safety parameters of terminals 1 & 2 of the BA368E Counter. These requirements are not restrictive and allow a wide range of galvanic isolators, such as solenoid drivers, to be used. 4.2.2 Pulse input As shown in Fig 4 the BA368E can count pulses from a wide variety of sensors in the hazardous area, or from the safe area as shown in Fig 5. No galvanic isolator is required in series with the input if the intrinsically safe pulse source is located within the same hazardous area as the BA368E Counter. The following table shows the switching thresholds for the various types of sensor. For reliable counting the pulse input must fall below the lower threshold and rise above the upper threshold. Input sensor Switching thresholds Lower Upper Switch 100 1000 Proximity detector 1.2mA 2.1mA Open collector 2k 10k Magnetic pick-off 0mV 40mV peak Voltage pulse low 1.0V 3.0V Voltage pulse high 3.0V 10.0V 4.2.3 Switch contact input Any mechanically activated switch contact located in the same hazardous area as the BA368E Counter may be directly connected to pulse input terminals 5 & 6 and 9 & 10 providing the switch and associated wiring can withstand a 500V rms insulation test to earth. Most magnetically activated reed relays comply with these requirements. The BA368E contains a configurable debounce circuit to prevent contact bounce being counted. See section 6.6 for details of the maximum counting frequency. 4.2.4 2-wire proximity detector input Most certified intrinsically safe 2-wire proximity detectors complying with NAMUR switching thresholds may be connected to the BA368E Counter inputs, providing the input safety parameters of the proximity detector are equal to or greater than the output safety parameters of the Counter inputs i.e. Ui ≥ 10.5V dc Ii ≥ 9.2mA dc Pi ≥ 24mW and the minimum operating voltage of the proximity detector is less than 7.5V. See section 6.6 for details of the maximum counting frequency. 12

Most open collector sensors located in the same hazardous area as the BA368E Counter may be directly connected to pulse input terminals 5 & 6 and 9 & 10 providing the sensor and associated wiring can withstand a 500V rms insulation test to earth. The open collector device must comply with the requirements for simple apparatus or have input safety parameters equal to or greater than: Ui > 10.5V dc Ii > 9.2mA dc Pi > 24mW See section 6.6 for details of the maximum counting frequency. 4.2.6 Magnetic pick-off input CoiL in the input configuration menu is a low level voltage pulse input intended for use with magnetic pick-off sensors producing an ac output. For a CoiL input the pulse input terminals 5 & 6 and 9 & 10 of the BA368E Counter comply with the requirements of simple apparatus allowing connection to any certified intrinsically safe magnetic pick-off within the hazardous area having output parameters equal to or less than: Uo ≤ 28V dc Io ≤ 200mA dc Po ≤ 0.84W The maximum permitted cable parameters will be defined by the magnetic pick-off’s intrinsic safety certificate less the Counters input parameters Ci & Li which are small and can often be ignored. See section 6.6 for details of the maximum counting frequency. 4.2.7 Voltage pulse input Two voltage pulse input ranges are selectable in the configuration menu, VoLt5 L and VoLt5 H. When configured for either of the voltage pulse ranges, the pulse input terminals 5 & 6 and 9 & 10 of the BA368E Counter comply with the requirements of simple apparatus allowing connection to any intrinsically safe voltage source within the hazardous area having output parameters equal to or less than: Uo ≤ 28V dc Io ≤ 200mA dc Po ≤ 0.84W The maximum permitted cable parameters will be defined by the voltage source intrinsic safety certificate less the BA368E Counter input parameters which are small and can usually be ignored. See section 6.6 for details of the maximum counting frequency. 4.2.8 Remote reset The BA368E Counter total display may be remotely reset to zero by connecting terminals RS1 & RS2 together for more than one second. Permanent interconnection inhibits totalisation. Remote resetting may be accomplished by any mechanically operated switch located in the same hazardous area as the Counter providing it and the associated wiring can withstand a 500V rms insulation test to earth. No galvanic isolator is required. A BA368E Counter may also be remotely reset to zero from the safe area. Any switch may be used but a galvanic isolator or IS relay is required to transfer the contact closure into the hazardous area. Almost any device with a contact that may be connected to equipment in the hazardous area may be used for this application. Fig 4 illustrates how a BA368E Counter may be reset from both the safe and the hazardous area. Note: The BA368E can be configured to reset the total display to zero when the & and * push buttons are operated simultaneously for more than three seconds - see 6.24. 13

Noryl enclosure with a toughened glass window. The front of the instrument has IP66 ingress protection and a gasket seals the joint between the instrument enclosure and the panel. The rear of the instrument has IP20 ingress protection. The BA368E may be installed in any panel providing that the operating temperature is between -40°C and +70°C and the intrinsic safety requirements are complied with. At temperatures below -20°C the instrument will continue to count but the display will become increasingly slow and the contrast will be reduced. Figs 6 shows the overall dimensions together with the recommended panel cut-out dimensions. To achieve an IP66 seal between the instrument enclosure and the instrument panel, the smaller cut- out dimensions should be used and the instrument should be secured with four panel mounting clamps. 5.2 EMC The BA368E Counter complies with the requirements of the European EMC Directive 2014/30/EU. For specified immunity all wiring should be in screened twisted pairs, with the screens earthed at one point within the safe area. Recommended panel cut-out dimensions for all installations Mandatory to achieve an IP66 seal between instrument and panel 136 +0.5/-0.0 x 66.2 +0.5/-0.0 DIN 43700 138.0 +1.0/ -0.0 x 68 +0.7 -0.0 Note: Optional backlight is internally powered Fig 6 BA368E dimensions & terminals 14

a. Cut the specified aperture in the panel. To achieve an IP66 seal between the instrument enclosure and the instrument panel the aperture must have the tighter tolerances specified in Fig 6. b. Slide the gasket over the body of the BA368E Counter before inserting the instrument into the panel aperture. c. Firstly ensure that all the panel mounting clamps are closed by turning the knurled screws fully anti clockwise until the two pips in the clamp foot align with holes in the clamp body. d. Place a clamp in the recess on each side of the Counter, pulling gently to slide it onto the dovetail as shown in Fig 7. Push the knurled screw slightly forward to engage the thread and tighten by turning clockwise until it is just finger tight. When all clamps are fitted ensure that the gasket behind the front panel bezel is correctly positioned before fully tightening the clamps to secure the instrument. The maximum recommended clamp tightening torque is 22cNm (1.95 lbf in) which is approximately equivalent to finger-tight plus one half turn. Do not over tighten. e. Four panel mounting clamps are required to achieve an IP66 seal between a BA368E Counter and the instrument panel. f. Connect the panel wiring to the rear terminal block(s) as shown in Fig 6. To simplify installation, the terminals are removable so that the panel wiring can be completed before the instrument is installed. To prevent vibration damage ensure panel wiring is supported. Fig 7 Fitting panel mounting clamps 5.4 Scale card The Counter’s units of measurement may be shown on a printed scale card in a window at the right hand side of the display. The scale card is mounted on a flexible strip that is inserted into a slot at the rear of the instrument as shown in Fig 8. Thus the scale card can easily be changed without removing the Counter from the panel or opening the instrument enclosure. New BA368E Counters are supplied with a printed scale card showing the requested units of measurement, if this information is not supplied when the instrument is ordered a blank card will be fitted. A pack of self-adhesive scale cards printed with common units is available as an accessory from BEKA associates. Custom printed scale cards can also be supplied. To change a scale card, unclip the tapered end of the flexible strip at the rear of the instrument by gently pushing it upwards and pulling it out of the enclosure. Peel the existing scale card from the flexible strip and replace it with a new printed card, which should be aligned as shown below. Do not fit a new scale card on top of an existing card. Install the new scale card by gently pushing the flexible strip into the slot at the rear of the Counter, when it reaches the internal end-stop secure it by pushing the end of the flexible strip downwards so that the tapered section is held by the rear panel. Align the self-adhesive printed scale card onto the flexible strip and insert the strip into the Counter as shown below. Fig 8 Inserting the flexible strip carrying the scale card into slot at the rear of the BA368E Counter. 15

The BA368E Counter is configured and calibrated via four front panel push buttons. All the configuration functions are contained in an easy to use intuitive menu that is shown diagrammatically in Fig 10. Each menu function is summarised in section 6.3 of this manual and each summary includes a reference to more detailed information. The isolated pulse output, including configuration, is described in section 7 of this manual. When factory fitted optional alarms and the optional 4/20mA output are included, additional functions appear in the configuration menu which are described in section 10 of this manual. All new BA368E Counters are supplied calibrated as requested at the time of ordering. If calibration is not requested, Counters will have default configuration as shown in the following table, but can easily be re- configured on-site. Function Display Default Input A inP . tYPE oP . CoL Debounce dEbounCE dEFAuLt Input b inP . tYPE oP . CoL Debounce dEbounCE dEFAuLt Counting edge A CntEdG-A EdGE 1 Counting edge b CntEdG-b EdGE 1 Update uPdAtE 0.5 Count Count A:b Upper display di5p-1 totAL Lower display di5P-2 on Decimal point dP Rate 00000 . 0 Total 00000000 Total scale factor 5CALE . t 001 . 00 Rate scale factor 5CALE . r 001 . 00 Timebase t-bA5E tb-01 Filter FiLter 24 Counter direction uP or dn uP Clear value clr val 00000000 Local clear loc clr Local total reset Clr tot oFF Local grand total reset Clr Gtot oFF Security code CodE 0000 Note: While the instrument is being configured counting continues so that any input pulses occurring during this time are recorded. 6.1 Calibration structure Fig 9 shows the calibration structure of the BA368E Counter. The two pulse inputs are processed by the count function to produce a single output having the selected arithmetic function, such as the sum of pulse input A and pulse input b. This output is passed to the 5cALE . r and 5CALE . T functions allowing the rate and total displays to have different engineering units. 5CALE . t is a dividing factor that converts the output from the Counter function into the required total display in engineering units. e.g. if the output from the Counter function is two pulses per pump stroke and a total display of thousands of pump strokes is required, 5CALE . t should be set to 2000. 5CALE . r is a dividing factor that converts the output from the Counter function into a rate display with the required engineering units. e.g. if the output from the Counter function is two pulses per pump stroke and it is required to display the pump stroke rate, 5CALE . r should be set to 2. The timebase t-bA5E is a multiplying factor that determines if the instrument displays rate per second, per minute or per hour. The BA368E uses ‘real’ decimal points. Moving the position of a decimal point in a scale factor will affect the instrument calibration. Fig 9 Calibration structure 16

Throughout this manual the instrument front panel push buttons are shown as &, *, ( and ) and legends displayed by the instrument are shown in a seven segment font as displayed by the Counter e.g. FiLtEr and 5CALE . r. Access to the configuration menu is obtained by operating the ( and ) push buttons simultaneously. If the instrument is not protected by a security code the first parameter inPut-A will be displayed. If a security code other than the default code 0000 has already been entered, the instrument will display CodE. Press ( to clear this prompt and enter the security code for the instrument using the & or * push button to adjust the flashing digit, and the ( push button to transfer control to the next digit. If the correct code has been entered pressing ) will cause the first parameter inPut-A to be displayed. If an incorrect code is entered, or a push button is not operated within ten seconds, the instrument will automatically return to the display mode. All configuration functions and prompts are shown on the upper eight digit display. Once within the configuration menu the required function can be selected by scrolling through the menu using the & and * push buttons. The configuration menu is shown diagrammatically in Fig 10. When returning to the display mode following reconfiguration, the BA368E Counter will display dAtA followed by 5AVE while the new information is stored in permanent memory. If after accessing the configuration menu the interval between operating any front panel push button exceeds one minute, the BA368E will automatically return to the display mode and any configuration changes will not be stored in permanent memory. When making changes to multiple configuration functions, it is therefore sensible to occasionally return to the display mode to save the changes that have already been made. 6.3 Summary of configuration functions This section summarises all the configuration functions. When read in conjunction with Fig 10 it provides a quick aid for configuring the Counter. If more detail is required, each summary contains a reference to a full description of the function. Display Summary of function inPut-A Contains sub-menu with two functions: inP . tYPE Select Input type dEbounCE Set debounce See section 6.4 inP . tYPE [for Input-A] Configures input-A to accept one of six types of input: oP . CoL Open collector * VoLt5 L Voltage pulse <1 >3V VoLt5 H Voltage pulse <3 >10V CoiL Magnetic pick-off Pr . dEt Proximity detector * ContACt Switch contact * * Link terminals 3 & 4 See section 6.5 dEbounCE [[[for Input-A] Defines level of input debounce applied to the pulse input A to prevent false counting: dEFAuLt HEAVY LiGHt See section 6.6 inPut-b Contains sub-menu with two functions: inP . tYPE Select Input type dEbounCE Set debounce See section 6.7 inP . tYPE [for Input-b] Configures input-b to accept one of six types of input: oP . CoL Open collector * VoLt5 L Voltage pulse <1 >3V VoLt5 H Voltage pulse <3 >10V CoiL Magnetic pick-off Pr . dEt Proximity detector * ContACt Switch contact * * Link terminals 7 & 8 See section 6.8 17

dEbounCE [for Input-b] Defines level of input debounce applied to the pulse input b to prevent false counting: dEFAuLt HEAVY LiGHt See section 6.9 CntEdG-A Input A pulse counting edge Defines whether the Counter is incremented/decremented on the leading or trailing edge of a pulse on input A. See section 6.10 CntEdG-b Input b pulse counting edge Defines whether the Counter is incremented/decremented on the leading or trailing edge of a pulse on input b. See section 6.11 updAtE Display update interval Defines the interval between display updates between 0.5 and 5 seconds. See section 6.12 Count Counting function Defines the arithmetic relationship of the two pulse inputs. The total display can be derived from: A:b Input A + Input b A:-b Input A - Input b A con b Input A controlled by Input b. a rel b Quadrature input (for position display) See section 6.13 di5P-1 Upper display Defines whether rAtE or totAL is shown on the upper display. The other variable will be shown on the lower display, providing the lower display is on in function dI5P-2. See section 6.14 Display Summary of function di5P-2 Lower display Turns the lower display, which normally shows rate, on or oFF. See section 6.15 dP Position of decimal points Defines the position of the decimal point in both the total and rate displays. See section 6.16 5CALE . t Total Scale Factor 5CALE . t is a dividing factor that converts the pulse output from arithmetic Count function into the required total display in engineering units. 5CALE . t may be adjusted between. 0.0001 and 99999. e.g. if one pulse represents 1 centimetre of dispensed cable and the total display is required in metres, 5CALE . t should be set to 100.0 which is the number of centimetres in a metre. The total display is independent of the rate display. See section 6.17 5CALE . r Rate scale factor 5CALE . r is a dividing factor that converts the pulse output from the arithmetic Count function into the required rate display in engineering units. 5CALE . r may be adjusted between 0.0001 and 99999. e.g. if one pulse represents 2 pump strokes and the rate display is required in pump strokes, 5CALE . r should be set to 0.5. The rate display is independent of the total display. See section 6.18 t-bA5E Timebase Selectable multiplier allowing rate to be displayed in units per second, per minute or per hour. Select: tb-01 for rate / second tb-60 for rate / minute tb-3600 for rate / hour See section 6.19 18

FiLtEr Display filter Is an adjustable digital filter to reduce the noise on the rate display. The filter has two parameters each represented by a digit adjustable between 0 and 9. The first digit defines the amount of filtering applied to the display, the second digit the deviation from the displayed rate at which the filter will be overridden and the rate display will move rapidly to the new value. See section 6.20 & or * Direction of count Determines whether pulses at inputs A and b increment or decrement the total display. See section 6.21 CLr VAL Reset value Defines a preset number to which the total display will be set when the BA368E Counter is locally or remotely reset. Enables the instrument to count down from a preset number. See section 6.22 LoC CLr Local clear Contains sub-menu with two functions enabling the total and the grand total to be reset via the front panel push buttons while the Counter is in the display mode. See section 6.23 Clr tot When on is selected total display is reset when & and * buttons are operated simultaneously for more than 3 seconds in the display mode. See section 6.24 Clr Gtot When on is selected the grand total may be reset when ) and * buttons are operated simultaneously for more than 10 seconds in the display mode - see section 2.2 for details. Note: Once reset, the grand total can not be restored. See section 6.25 Display Summary of function Clr Gtot Resets grand total to zero from within configuration menu. This function resets the grand total to zero from within the configuration menu when CLr YE5 is selected. Note: Once reset, the grand total can not be recovered. See section 6.26 CodE Access code Defines a four digit alphanumeric code that must be entered to gain access to the configuration menu. Default code 0000 disables the security function and allows unrestricted access to all configuration functions. See section 6.27 r5Et dEF Reset to factory defaults Returns the BA368E Counter to the factory defaults shown in section 6.0 To prevent accidental use the request must be confirmed by entering 5urE before the reset will be executed. See section 6.28 19

The Input A function contains two sub-functions inP . tYPE and dEbounCE that define the type of input and the amount of input noise rejection. 6.5 Input A type: inP. tYPE inP . tYPE is a sub-menu in the inPut-A function which defines the type of input sensor or input pulse that the instrument will count at Input-A. To check or change the type of input, select inPut-A in the configuration menu and press ( which will reveal the inP. tYPE prompt, pressing ( again will show the existing Input-A setting. If set as required press ) twice to return to the configuration menu, or repeatedly press the & or * button until the required type of input is displayed and then press ) twice to return to the configuration menu. One of following six types of input may be selected: Switching thresholds Low High oP . CoL Open collector 2 2 10kΩ VoLt5L Voltage pulse low 1 1 3V VoLt5H Voltage pulse high1 3 10V CoiL Magnetic pick-off 0 40mV Pr . dEt Proximity detector 2 1.2 2.1mA ContACt Switch contact 2 100 1000Ω Notes: 1. Maximum voltage input +28V. 2. For sensors connected to Input-A that require energising i.e. proximity detectors, switch contacts or open collector sensors, terminals 3 & 4 of the BA368E should be linked together. 3. To count correctly, the input pulse must fall below the lower switching threshold and rise above the higher switching threshold. 4. See section 6.6 for maximum counting frequency. 6.6 Input A debounce: dEbouncE dEbouncE is an adjustable sub-menu in both the inPut-A and inPut-b functions which prevents the input miscounting when the input pulse has noisy edges, such as those resulting from a mechanical contact closing and bouncing. The debounce function only applies to the input in which the function is located. Three levels of protection may be independently selected for each input. The amount of debounce applied depends upon the type of Counter input that has been selected for the input in the associated inP . tYPE function. Select inPut-A or inPut-b in the configuration menu and press ( which will reveal the inP . tYPE prompt, press the & or * button to select dEbouncE followed by ( to reveal the existing setting. Pressing the & or * button will scroll through the three levels. When the required level has been selected, pressing ) twice will enter the selection and return the display to the configuration menu. The following table shows the minimum time that the input pulse must be continuously above the upper input switching threshold and continuously below the lower switching threshold to ensure that the Counter processes the input pulse. Input switching thresholds are shown in section 4.1.2. debounce level Min input pulse width Type of Input Contact All others Default 1600µs 40µs Heavy 3200µs 350µs Light 400µs 5µs The maximum counting frequency of the BA368E depends upon the debounce level selected, the shape of the input pulse and its amplitude. The following table assumes a square wave input and is included for guidance. The maximum counting frequency will be lower if the input pulses have sloping edges and the pulse amplitude only slightly exceeds the input switching thresholds. ONLY FOR GUIDANCE debounce level Max counting frequency Type of input Contact All others Default 250Hz 12kHz Heavy 120Hz 2kHz Light 1000Hz 100kHz The minimum input frequency is 0.01Hz. Below this frequency the rate display will be forced to zero. 22

The Input b function contains two sub-functions inP . tYPE and dEbounCE that define the type of input and the amount of input noise rejection. 6.8 Input b type: inP. tYPE inP. tYPE is a sub-menu in the inPut-b function which defines the type of input sensor or input pulse that the instrument will count at Input-b. To check or change the type of input, select inPut-b in the configuration menu and press ( which will reveal the inP. tYPE prompt, pressing ( again will show the existing Input-b setting. If set as required press ) twice to return to the configuration menu, or repeatedly press the & or * button until the required type of input is displayed and then press ) twice to return to the configuration menu. One of following six types of input may be selected: Switching thresholds Low High oP . CoL Open collector 2 2 10kΩ VoLt5L Voltage pulse low 1 1 3V VoLt5H Voltage pulse high1 3 10V CoiL Magnetic pick-off 0 40mV Pr . dEt Proximity detector 2 1.2 2.1mA ContACt Switch contact 2 100 1000Ω Notes: 1. Maximum voltage input +28V. 2. For sensors connected to Input-b that require energising i.e. proximity detectors, switch contacts or open collector sensors, terminals 7 & 8 of the BA368E should be linked together. 3. To count correctly, the input pulse must fall below the lower switching threshold and rise above the higher switching threshold. 4. See section 6.6 for the maximum counting frequency. 6.9 Input b debounce: dEbouncE Exactly as input A, please see section 6.6 6.10 Input A pulse counting edge: CntEdg-A This function allows the edge on which a count occurs to be selected. It applies to input A for all counting modes except quadrature (A rEL b). To check or change the input A pulse edge on which the count occurs select CntEdG-A from the configuration menu and press ( which will reveal EdGE 1 or EdGE 2. If required press the & or * button to change the setting, followed by the ) button to return to the configuration menu. EdGE 1 Type of input Counting edge Voltage Low to high Switch contact Closed to open Open collector Closed to open Proximity detector High to low current EdGE 2 Type of input Counting edge Voltage High to low Switch contact Open to closed Open collector Open to closed Proximity detector Low to high current Note: The counting edge function CntEdg-A is not included in the configuration menu when the BA368E Counter has a quadrature input A rEL b. In quadrature mode the instrument will count up when the rising edge of input-b leads the rising edge of input-A. See section 6.13. 6.11 Input b pulse counting edge: CntEdg-b This function allows the edge on which a count occurs to be selected. It applies to input b for all counting modes except quadrature A rEL b and input A controlled by input b A Con b. To check or change the input b pulse edge on which the count occurs select CntEdG-b from the configuration menu and press ( which will reveal EdGE 1 or EdGE 2. If required press the & or * button to change the setting, followed by the ) button to return to the configuration menu. EdGE 1 Type of input Counting edge Voltage Low to high Switch contact Closed to open Open collector Closed to open Proximity detector High to low current EdGE 2 Type of input Counting edge Voltage High to low Switch contact Open to closed Open collector Open to closed Proximity detector Low to high current 23

included in the configuration menu when the BA368E Counter has a quadrature input A rEL b or when input A is controlled by input b A Con b. In quadrature mode the instrument will count up when the rising edge of input-b leads the rising edge of input-A. See section 6.13. 6.12 Display update interval: uPdAtE If either the rate or the total display is likely to change rapidly, a longer interval between display updates may simplify reading. This function allows one of six different display intervals between 0.5 and 5 seconds to be selected. The selected display update interval does not affect the update time of any other instrument function. To adjust the update interval select uPdAtE from the configuration menu and press ( to reveal the current update interval. Pressing the & or * button will scroll through the six times. When the required interval has been selected press ) to enter the selection and return to the configuration menu. 6.13 Counting function: Count This function defines the arithmetic relationship between Inputs A and Input b. The following four modes may be selected: Display Input count mode A : b Pulses at input A added to pulses at input b. A : -b Pulses at input b subtracted from pulses at input A. * A Con b Input b controls count direction of input A. * Input b Input A Low Up counter High Down counter A rEL b Quadrature input with sensors electrically 90o apart. * * The pulse output is not available with these count modes. Fig 11 shows the voltage waveforms at the two inputs and the resulting total display when the BA368E is configured to count up on a rising edge. Fig 11 Counting waveforms Note: For a quadrature input the two signals do not require equal marks and spaces to achieve reliable counting. 6.14 Upper display: di5P-1 Usually the total count is shown on the larger upper eight digit display, but this function reverses the display locations allowing rate to be shown on the larger upper display and total on the smaller lower display. To check the setting for the display, select dI5P-1 from the configuration menu and press ( which will reveal if the display is showing rAtE or totAL. The setting can be changed by pressing the & or * button followed by the ) button to enter the selection and return to the configuration menu. 24

This function turns the lower display on or off. When turned off, the BA368E will only have one eight digit display which may be configured in the di5P-1 function to show the total count or rate. To check the setting for the lower display, select di5P-2 from the configuration menu and press ( that will reveal if the lower display is on or oFF. The setting may be changed by pressing the & or * button followed by the ) button to enter the selection and return to the configuration menu. 6.16 Position of the decimal points: dP The upper and lower displays have eight and six digits respectively. This function enables the position of the decimal point in both displays to be independently positioned as shown below. Upper display Total 0 0 0 . 0 . 0 . 0 . 0 . 0 1 of 5 positions or absent Rate 0 0 . 0 . 0 . 0 . 0 1 of 4 positions or absent Lower display Total 0 . 0 . 0 . 0 . 0 . 0 1 of 5 positions or absent Rate 0 0 . 0 . 0 . 0 . 0 1 of 4 positions or absent To adjust the position of the decimal points select dP from the configuration menu and press (. The upper display defined as the rate or total display by function di5P-1 (section 6.14) will be activated and identified by the display annunciator as Rate or Total. The decimal point, which may be positioned as shown in the table above, is moved by operating the & or * push button. The & button moves the position of the decimal point to the left and the * button moves the decimal point position to the right. When the decimal point in the upper display has been positioned pressing the ( button will transfer control to the lower display variable, but it will be shown and annunciated on the larger upper display. The position of the decimal point may be positioned in the same way by operating the & and * push buttons. When both decimal points are positioned as required, enter the settings and return to the configuration menu by operating the ) button. Note: Adjustment of a decimal point position will disable the following outputs which must be re-enabled after the adjustment is complete: Pulse output Optional Alarm outputs Optional 4/20mA output 6.17 Total scale factor: 5CALE . t 5CALE . t is a dividing factor adjustable between 0.0001 and 99999 that enables the total to be displayed in engineering units. e.g. if one pulse from the arithmetic count function represents 1 centimetre of dispensed cable and the total display is required in metres, 5CALE . t should be set to 100.0 which is the number of centimetres in a metre. If just the total number of input pulses is required, 5CALE . t should be set to 1.0. The total display is independent of the rate display. To check or change the total scale factor select 5CALE . t from the configuration menu and press ( which will reveal the existing value with one digit flashing. The value of the flashing digit may be changed by pressing the & or * button. When this digit has been adjusted as required, pressing ( will transfer control to the next digit. When all the digits have been adjusted pressing ( will transfer control to the decimal point that may be positioned between any of the digits, or may be omitted by moving it to the right of the least significant digit. When the total scale factor has been entered, press ( to return to the 5CALE . t prompt in the configuration menu. Note: Adjustment of 5cale . t will disable the following ouputs which must be re-enabled after the adjustment is complete: Pulse output Optional Alarm outputs Optional 4/20mA output 6.18 Rate scale factor: 5CALE . r 5CALE . r is a dividing factor adjustable between 0.0001 and 99999 that enables the rate display to be shown in engineering units. e.g. if one pulse from the arithmetic count function represents 2 pump strokes and the rate display is required in pump strokes, 5CALE . r should be set to 0.5. If just the rate of input pulses is required, 5CALE . r should be set to 1.0. The rate display is independent of the total display. The units of the rate display are counts per unit of time. The unit of time is the timebase of the instrument which is determined by t-bA5E described in section 6.19. To check or change the rate scale factor select 5CALE . r from the configuration menu and press ( which will reveal the existing value with one digit flashing. The value of the flashing digit may be adjusted by pressing the & or * button. 25

pressing ( will transfer control to the next digit. When all the digits have been adjusted pressing ( will transfer control to the decimal point that may be positioned between any of the digits, or may be omitted by moving it to the right of the least significant digit. When the required rate scale factor has been entered, press ) to return to the 5CALE . r prompt in the configuration menu. Note: Adjustment of 5cale . r will disable the following ouputs which must be re-enabled after the adjustment is complete: Pulse output Optional Alarm outputs Optional 4/20mA output 6.19 Timebase: t-bA5E The timebase multiplies the rate display by 1, 60 or 3,600 depending upon whether the BA368E Counter is required to display rate per second, per minute or per hour. See Fig 9. To check or change the timebase, select t-bA5E from the configuration menu and press ( which will reveal the current setting. Pressing the & or * button will scroll through the three options: tb-1 for pulses / second tb-60 for pulses / minute tb-3600 for pulses / hour When the required multiplier is displayed press ) to return to the t-bA5E prompt in the configuration menu. 6.20 Display filter: FiLtEr The digital display filter has two independent adjustable parameters enabling the rate display response to be tailored for optimum performance. The filter parameters are controlled by a two digit number. The first digit defines the amount of filtering applied to the display as shown below. First digit Filter time constant Seconds 0X 0 1X 1.3 2X 4.3 3X 6.5 4X 8.7 5X 11.3 6X 15.7 7X 20.9 8X 25.2 9X 31.5 The second digit defines the deviation from the displayed rate at which the filter will be overridden and the rate display will move rapidly to the new value. Second digit Magnitude of step change which will produce a rapid response X0 Off X1 1% X2 2% X3 4% X4 8% X5 12% X6 16% X7 24% X8 32% X9 64% By careful adjustment of the two parameters a stable display with an acceptable input step response can be obtained for most applications. During commissioning it is recommend that initially the second digit is set to 0 (off) and the first digit is adjusted to provide acceptable rate display stability. The second digit should then be increased until the selected step size is greater than the noise on the display signal, at which setting the rate display will become stable. These will be the optimum filter parameters for acceptable rate display stability and a fast response to a large rate signal change. To check or change the filter select FiLtEr in the configuration menu and press ( which will reveal the current settings with the first digit flashing. Pressing the & or * button will adjust the flashing digit and ( will transfer control to the second digit. While making adjustments the filtered rate display is shown on the lower display so that stability can be assessed while adjustments are being made. When set as required, press the ) button to enter the revised parameters and return to the FiLtEr prompt in the configuration menu. 26

This function defines whether input pulses increment or decrement the total display. i.e. whether Input A is an up-counter or a down counter. When configured as a down-counter with a non-zero number entered for the reset value CLr VAL, the BA368E will count down from the re-set value to zero. To check or change the count direction select uP or dn from the configuration menu and press ( which will reveal the present setting. uP indicates that the instrument is an up-counter and dn that it is a down counter. Pressing the & or * buttons will toggle the instrument between the two settings. When set as required, press the ) button to enter the setting and return to the configuration menu. Note: The Count function described in section 6.13 also affects the direction in which the BA368E counts. 6.22 Reset value: CLr VAL This function defines the value to which the total display is reset when the local or remote reset are operated. This allows the BA368E to be used as a pre-set down counter. When the instrument is used as an up-counter, CLr VAL is normally set to zero. To check or change the reset value select CLr VAL from the configuration menu and press ( which will reveal the current setting with one digit flashing. The flashing digit may be adjusted by pressing the & or * button. When this digit is correct, pressing ( will transfer control to the next digit. When all the digits have been adjusted press the ) button to enter the revised number and return to the configuration menu. 6.23 Local reset: LoC CLr The Local reset function contains two sub-functions Clr tot and Clr Gtot which when enabled allow the total display and grand total to be reset via the instrument front panel push buttons while the BA368E Counter is in the display mode. 6.24 Local total reset: Clr tot Clr tot is a sub-menu in the LoC CLr function. When activated it allows an operator to reset the total display to the reset value [see section 6.22] while the BA368E Counter is in the display mode by operating the & and * push buttons simultaneously for more than three seconds. To check or change the setting select LoC CLr in the configuration menu and press ( which will reveal the Clr tot prompt, operating ( again will show if the local total reset is on or oFF. If set as required operate the ) button twice to return to the configuration menu, or the & or * button to change the setting followed by the ) button twice to enter the change and return to the LoC CLr prompt in the configuration menu. Note: The total display may also be remotely reset to the reset value by connecting terminals RS1 and RS2 together for more than one second. See sections 3.6; 4.1.8 and 4.2.8 of this manual. 6.25 Local grand total reset: Clr Gtot The grand total is a separate sixteen digit counter which is incremented or decremented in parallel with the total display, but is not reset when the total display is reset. The grand total may be viewed in the display mode in two eight digit sections as described in section 2.2 of this manual. Clr Gtot is a sub-menu in the LoC CLr function which when activated allows the operator to reset the grand total display to zero from the display mode by operating the ) and * push buttons simultaneously for more than ten seconds. To check or change the setting select LoC CLr in the configuration menu and press ( which will reveal Clr tot. Using the & or * button to select Clr Gtot and press ( which will show if local grand total reset is on or oFF. If set as required operate the ) button twice to return to the configuration menu, or the & or * button to change the setting followed by the ) button twice to enter the change and return to the LoC CLr prompt in the configuration menu. Note: Once reset, the grand total can not be recovered. 6.26 Reset grand total from configuration menu: Clr Gtot The grand total is a separate sixteen digit counter which is incremented or decremented in parallel with the total display, but is not reset when the total display is reset. The grand total may be viewed in the display mode in two eight digit sections as described in section 2.2 of this manual. To zero the grand total from within the configuration menu select CLr Gtot and press ( which will cause the instrument to display Clr . no with no flashing. 27

clr ye5, pressing ( will result in the instrument displaying 0000 with the first digit flashing. This is a request to confirm the reset instruction by entering 5urE. Using the & or * button set the first flashing digit to 5 and press ( to transfer control to the second digit which should be set to u. When 5urE has been entered pressing the ) button will reset the grand total which will be confirmed by a brief display of Gt Clrd, the instrument will automatically return to the Clr Gt prompt in the configuration menu. Note: Once reset, the grand total can not be recovered. 6.27 Security code: ‘CodE’ Access to the instrument configuration menu may be protected by a four digit security code which must be entered to gain access. New instruments are configured with the default security code 0000 which allows unrestricted access to all configuration functions. To enter a new security code select CodE from the configuration menu and press ( which will cause the BA368E Counter to display 0000 with one digit flashing. The flashing digit may be adjusted using the & and * push buttons, when set as required operating the ( button will transfer control to the next digit. When all the digits have been adjusted press ) to return to the CodE prompt. The revised security code will be activated when the BA368E Counter is returned to the display mode. Please contact BEKA associates sales department if the security code is lost. 6.28 Reset configuration to factory defaults r5Et dEF This function returns the BA368E Counter to the factory defaults shown in section 6.0. To prevent accidental use the request must be confirmed by entering 5urE before the configuration change will be executed. Select r5Et dEF from the configuration menu and press (. the instrument will display 0000 with the first digit flashing. To confirm the instruction to reset all the configuration functions to factory defaults 5urE must be entered. Using the & or * button set the first flashing digit to 5 and press ( to transfer control to the second digit which should be set to u. When 5urE has been entered pressing the ) button will reset all the configuration functions to the factory default settings and zero both the total display and the grand total. While resetting the BA368E Counter will display - - - - - - - - before automatically returning to the display mode when the operation is complete. 6.29 Display overflow The BA368E Counter total has a maximum display range of -9999999 to 99999999 when shown on the eight digit upper display. If this range is exceeded the display will be as shown below with all of the decimal points flashing: Overrange 9.9.9.9.9.9.9.9 Underrange -9.9.9.9.9.9.9 When the total is shown on the lower six digit display the maximum display range is -99999 to 999999. When a total overflow occurs the actual total may be obtained from the instrument's grand total display which has sixteen digits - see 2.2. To prevent future total display overflows occurring the total scale factor 5CALE . t and the position of the decimal point in the total display dP should be reviewed. 28

The BA368E Counter has an opto-isolated solid state pulse output. The output is an open collector having the following electrical parameters: Ron = 60 + 3V Roff = 1M Imax = 10mA The output pulse may be a duplicate of Input A or Input b for re-transmission applications, or it may be derived from the total display. When derived from the total display the output pulse frequency may be divided and the output pulse width defined. The retransmitted RTx annunciator on the instrument display shows the status of the retransmitted pulse output. Annunciator activation depends upon the setting of 5ource in the pulse output configuration menu. 5caled: Annunciator activated each time pulse output open collector is on, i.e. Ron is less than 60Ω + 3V. direct: Annunciator continuously activated 7.1 Intrinsic safety The pulse output is an optically isolated separate intrinsically safe circuit that has zero output safety parameters. The output therefore complies with the requirements for simple apparatus. This allows pulse output terminals P1 and P2 to be directly connected to any intrinsically safe circuit protected by a certified Zener barrier or galvanic isolator providing the output parameters do not exceed: Uo = 28V dc Io = 200mA Po = 0.84W The equivalent capacitance and inductance of the pulse output are both zero which allows the maximum permissible cable parameters specified by the certificate for the Zener barrier or galvanic isolator powering the pulse output circuit to be used. 7.2 System design The BA368E Counter pulse output is a passive circuit i.e. not powered, but it is totally isolated from all other Counter circuits. Subject to complying with intrinsic safety interconnection requirements, the terminals P1 and P2 may be connected to another instrument with an open collector input. The pulse output may also be transferred to the safe area via a galvanic isolator or a Zener barrier. Fig 12 shows how a 2-channel Zener barrier may be used to produce a voltage pulse in the safe area that could be used to drive a safe area counter. The positive terminal of the pulse output circuit P1 is connected to the BA368E Counter’s positive supply terminal 1 at the instrument. When an output pulse occurs and the open collector output 'closes', P2 is connected to P1 and a pulse current flows through the diode return barrier to resistor R1 in the safe area. The current flowing in the circuit is determined by R1 which should be chosen to limit the pulse output current to less than 10mA. For a 24V supply R1 should be greater than 2,200Ω. 29

using Zener barriers. 7.3 Configuration The pulse output is configured via a PuL5E oP sub-menu located between the LoC CLr and the Clr Gtot functions in the configuration menu as shown in Fig 13. This sub-menu allows the source of the output pulse to be selected. For re-transmission applications the output pulse may be a synchronous duplicate of the pulse at Input A or at Input b by selecting dirECt A or dirECt b in the 5ourCE sub-function. Selecting 5CALEd derives the output pulse from the total display and introduces two additional functions, diVidE and durAtion to the sub-menu allowing the output pulse frequency to be divided and the output pulse width (duration) to be defined. If the diVidE and durAtion functions are configured such that the output pulse frequency with the specified pulse width can not be output in real time, the number of pulses will be stored and transmitted at the maximum possible speed. When the total display is reset to zero or the power supply to the BA368E Counter is disconnected or turned off, any stored pulses will not be retained. 7.4 Access Pulse output sub-menu: PuL5E oP Using the & or * push button scroll through the Counters configuration menu until PuL5E . oP is displayed, pressing ( will then access the pulse output sub-menu which is shown in Fig 13. Fig 13 Pulse output configuration sub-menu 7.5 Enable pulse output: EnbL This function allows the pulse output to be disabled or enabled without altering any of the pulse output parameters. Using the & or * push button select EnbL in the pulse output sub-menu and press (. to reveal the existing setting on or oFF. The function can be changed by pressing the & or * push button followed by the ) button to return to EnbL prompt. 30

The output pulse may be derived from: dirECt A Output is duplicate of input A pulse. dirECt b Output is duplicate of input b pulse. 5CALEd Output is derived from the total display and is only functional when the Count function is configured for A+b. When 5CALEd is selected two additional functions, diVidE and durArion, appear in the pulse output sub- menu. Using the & or * push button select 5ourCE in the pulse output sub-menu and press (. to reveal the existing pulse source. The function can be changed by pressing the & or * push button followed by the ) button to return to 5ourCE prompt. 7.7 Divide output pulse frequency: diVidE When the output pulse is derived from the total display the output pulse frequency may be divided by: 1 10 100 1000 10000 Using the & or * push button select diVidE in the pulse output sub-menu and press ( to reveal the existing divisor. The value can be changed by pressing the & or * push button to select the required value followed by the ) button to return to diVidE prompt. Note: This function only appears in the sub-menu when the output pulse is derived from the total display. 7.8 Output pulse width: durAtion When the output pulse is derived from the total display, the pulse width is defined by this function. One of 11 pulse widths in milliseconds may be selected: 0 . 1 0 . 5 1 2 . 5 5 10 25 50 100 250 500 Using the & or * push button select durAtion in the pulse output sub-menu and press ( to reveal the existing pulse duration. The value can be changed by pressing the & or * push button to select the required value followed by the ) button to return to durAtion prompt. Note: This function only appears in the pulse output sub-menu when the output pulse is derived from the total display. 31

A BA368E Counter is required to display the position and speed, including direction, of a cable which is sensed by two proximity detectors mounted on a wheel with a circumference of 1m over which the cable runs. The sensors, which produce fifteen pulses per revolution, are positioned so their outputs are electrically 90° apart. The BA368E is required to display the position of the cable relative to a starting point in metres with a resolution of 0.1m, and to show speed of the cable in metres per second with a resolution of 1m. The total display (position) is to be resettable by an external contact, not from the BA368E Counter front panel. Similarly the grand total is not to be resettable from the BA368E Counter front panel. To prevent tampering the instrument configuration menu is to be protected by security code 1209. The BA368E may be configured on-site without disconnection from the power supply or from the two proximity detectors. If after accessing the configuration menu the interval between operating any front panel push button exceeds one minute the BA368E will automatically return to the display mode and any configuration changes will not be stored in permanent memory. When making multiple changes it is therefore sensible to occasionally return to the display mode to save the changes that have already been made. Step 1 Enter the configuration menu Put the BA368E Counter in the configuration mode by simultaneously pressing ( and ) push buttons. Assuming a security code has not already been entered the instrument will respond by displaying inPut-A which is the first parameter in the configuration menu. See Fig 10 Step 2 Select the type of inputs With InPut-A displayed; press ( to reveal the existing setting. Using the & or * button select Pr . dEt, the input for a 2-wire proximity detector, and then return to the inPut-A prompt in the configuration menu by pressing ). Repeat for the second input inPut-b Step 3 Select input count mode The two proximity detectors are positioned so their outputs are electrically 90° apart. From this information, in the quadrature input mode the BA368E Counter can sense the direction and angular movement of the wheel to which the proximity detectors are attached. Hence, the relative position of the cable can be displayed by the counter. Select Count from the configuration menu and press (. Using the & or * button select A rEL b the quadrature function and press ) to return to the ‘Count’ prompt in the configuration menu. Step 4 Define function of upper display In the example the cable position (total display) is required on the eight digit upper display. Select dI5P-1 from the configuration menu and press ( which will reveal if the upper display is showing rAtE or totAL. Using the & or * button select totAL followed by the ) button to enter the selection and return to the configuration menu. Step 5 Activate lower rate display A rate display is required so the lower display must be activated. Select di5PLAY . 2 from the main menu and press ( to show the existing setting. Using the & or * button select on followed by ) to enter the selection and return to the configuration menu. Step 6 Position of decimal point In this example the BA368E is required to display total (position) with a resolution of one decimal place and rate (speed) with no decimal point. Select d . P. from the configuration menu and press (. The BA368E will show and identify the total display with all the digits activated. Using the & or * button position the decimal point between the first and second least significant digits. Operating the ( button will show and identify the rate display with all the digits activated, Using the & or * button position the decimal point to the right of the least significant digit i.e. not visible. Finally press ) to return to the configuration menu. 32

In this example the proximity detectors produce fifteen pulses per one metre movement of the cable. The position display is required in metres so the total (position) scale factor 5CALE . t should be set to 15.0. Select 5CALE . t from the configuration menu and press ( to view the current value with one digit flashing. Use the & and * buttons to adjust each digit in turn and the ( button to transfer control to the next digit and to the decimal point. Enter 15.0 and return to the 5CALE . t prompt in the configuration menu by pressing ). Step 8 Enter the rate scale factor In this example the proximity detectors produce fifteen pulses per one metre movement of the cable. The rate display is required in metres per second so the rate (speed) scale factor 5CALE . r should be set to 15.0. Select 5CALE . r from the configuration menu and press ( to view the current value with one digit flashing. Use the & and * buttons to adjust each digit in turn and the ( button to transfer control to the next digit and to the decimal point. Enter 15.0 and return to the 5CALE . r prompt in the configuration menu by pressing ). Step 9 Set the display timebase In this example the rate display (speed) is required in metres per second. Select t-bA5E from the configuration menu and press ( to reveal the current setting. Using the & or * button scroll through the three options and select tb-1. Return to the t-bA5E prompt in the configuration menu by pressing ). Step 10 Adjust the rate display filter The rate display filter parameters should be adjusted experimentally after installation to provide a stable rate display with an acceptable step response. During commissioning it is recommended that initially the second digit of the rate parameters is set to 0 (step response off) and the first digit (amount of filtering) is adjusted to provide acceptable rate display stability. The second digit should then be increased until acceptable rate display stability is once again achieved. To adjust the filter parameters select FiLtEr from the main menu and press ( to reveal the current setting. The first digit will be flashing and may be adjusted using the & or * button. The ( button will transfer control to the second digit. When both are set as required, return to the FiLtEr prompt in the main menu by pressing ). Note: While adjusting the filter, the rate is shown on the lower display so that stability can be assessed. Step 11 Direction of count In this application the direction of count will determine whether a cable movement is shown as a positive or negative position and rate. If input A occurs before input b, a positive display will result when the BA368E is configured to count up. Select uP or dn from the main menu and press ( to reveal the existing setting. Using the & or * button select uP followed by ) to enter the selection and return to the configuration menu. 33

In this example the operator must not be able to zero the total (cable position) display or the grand total from the instrument front panel. Both local clear functions should therefore be turned off. Select LoC CLr from the main menu and press ( which will result in Clr tot being displayed, press ( again to show if the function is turned on or oFF. Using the & or * button toggle the display to oFF and press ) to return to the Clr tot prompt from which Clr Gtot can be selected by pressing the & or * button. Turn this function off in exactly the same way before returning to the configuration menu by pressing the ) button twice. Step 13 Define the security code Defining an access security code prevents unauthorised access to the configuration menu. Select CodE in the configuration menu and press ( which will reveal the existing security code with the first digit flashing. Using the & and * buttons enter the new code 1209 digit by digit. The ( button transfers control between digits. When the new code has been entered, press ) to return to the configuration menu. Step 14 Return to the display mode Following completion of configuration, return the BA368E to the display mode by pressing ). The instrument will display dAtA followed by 5AVE while the configuration changes are stored in permanent memory. 34

If a BA368E Counter fails to function during commissioning the following procedure should be followed: Symptom Cause Check: No display No power supply, or incorrect wiring. Note: Terminals 2, 6, 10 & RS2 are interconnected within the instrument. That there is between 10 and 28V on terminals 1 & 2 with terminal 1 positive. Counter is receiving power but pulse input indicator not rotating. No input pulses, incorrect input configuration, incorrect linking of terminals 3 & 4 and terminals 7 & 8. Input configuration. Linking of terminals 3 & 4. and terminals 7 & 8. That input signal polarity is correct. Pulse input indicator rotating but incorrect rate display. Incorrect rate display calibration 5CALE . r t-bA5E Pulse input indicator rotating but incorrect total display. Incorrect total display calibration. Remote reset switch contacts closed. 5CALE . t That RESET annunciator on display is not activated. If it is, check reset wiring and switch. Pulse input indicator rotating but total display showing 9.9.9.9.9.9.9.9 or -9.9.9.9.9.9.9 Or if shown on the lower display 9.9.9.9.9.9 or -9.9.9.9.9 Total display has overflowed. Reposition decimal point in total display or enter a different 5CALE . t to reduce total display magnitude. Unstable rate display Noisy pulse input signal Eliminate source of electrical noise. Increase debounce and/or display filter. Unable to enter configuration menu. Incorrect security code That the correct security code is being used. Contact BEKA if code is lost. Alarms do not function Alarms have been disabled following calibration change. Re-enable both alarms. 9.2 Fault finding after commissioning ENSURE PLANT SAFETY BEFORE STARTING MAINTENANCE Live maintenance is permitted on intrinsically safe equipment installed in a hazardous area, but only certified test equipment should be used unless a gas clearance certificate is available. If a BA368E Counter fails after it has been functioning correctly, the following table may help to identify the cause of the failure. Symptom Cause Check: No display No power supply. That there is between 10 and 28V on terminals 1 & 2 Pulse input indicator not rotating. No input pulses Output from sensor. Wiring between sensor and BA368E Counter. Unstable rate display Noisy pulse input signal Locate source of electrical noise, or increase debounce and rate display filter. If this procedure does not reveal the cause of the fault, it is recommended that the instrument is replaced. 9.3 Servicing We recommend that faulty BA368E Counters are returned to BEKA associates or to our local agent for repair. 9.4 Routine maintenance The mechanical and electrical condition of the instrument should be regularly checked. Initially annual inspections are recommended, but the inspection frequency should be adjusted to suit the environmental conditions. 9.5 Guarantee Instruments which fail within the guarantee period should be returned to BEKA associates or our local agent. It is helpful if a brief description of the fault symptoms is provided. 9.6 Customer comments BEKA associates is always pleased to receive comments from customers about our products and services. All communications are acknowledged and whenever possible, suggestions are implemented. 35

The BA368E Counter has a window on the right hand side of the display through which a scale card showing the units of measurement such as metres is visible. New Counters are fitted with a scale card showing the units of measurement specified when the instrument was ordered, if the units are not specified a blank scale card will be fitted. A pack of scale cards pre-printed with common units of measurement is available as an accessory. These can easily be fitted on-site to the Counter without opening the instrument enclosure or removing it from the panel, See section 5.4 of this instruction manual. Custom scale cards for applications requiring less common units of measurement are also available. 10.2 Tag information New Counters can be supplied with a tag number or application information thermally printed onto the rear panel adjacent to the terminals. This information is not visible from the front of the instrument after installation. 10.3 Alarms The BA368E Counter can be supplied with factory fitted dual alarms. Each may be independently configured as a rate display or total display, high or low alarm. with a normally open, or a normally closed solid state output. Configurable functions for each alarm include adjustable setpoint, alarm delay time and alarm silence time. Hysteresis may be applied to rate alarms. WARNING These alarm outputs should not be used for critical safety applications such as a shut down system. When the BA368E power supply is turned off or disconnected, alarm outputs will open irrespective of whether normally open or normally closed outputs have been selected. When designing a system an open output should therefore be chosen for the alarm condition. Alarm annunciators on the instrument display indicate the status of each alarm. If an alarm delay or silence time has been selected the annunciator will flash during the delay or silence period. The BA368E internal counters are up-dated and compared with the alarm setpoint twice per second, irrespective of the display update time selected. This may result in an alarm being delayed for up to half a second after the rate or total has exceeded the setpoint. 10.3.1 Solid state output Each alarm has a galvanically isolated single pole solid state switch output as shown in Fig 14. The outputs are polarised and current will only flow in one direction. Terminals A1 and A3 should be connected to the positive side of the supply. Ron = less than 5 + 0.7V Roff = greater than 1M Note: Because of the series protection diode some test meters may not detect a closed alarm output Fig 14 Equivalent circuit of each alarm output 10.3.2 Intrinsic safety Each alarm output is a separate galvanically isolated intrinsically safe circuit with output safety parameters complying with the requirements for simple apparatus. This allows the alarm output terminals A1 & A2 and A3 & A4 to be connected to almost any intrinsically safe circuit protected by a Zener barrier or galvanic isolator providing the output parameters of the circuit do not exceed: Uo 28V dc Io 200mA Po 0.84W The maximum equivalent capacitance and inductance between each set of alarm terminals is: Ci = 22nF Li = 4µH (Effectively 0) 36

parameters Ci should be subtracted from the maximum permitted external capacitance Co specified by the certificate for the intrinsically safe interface powering the alarm circuit, such as the solenoid driver and switch transfer galvanic isolators shown in Fig 15 Fig 15 Typical alarm application 10.3.3 Summary of configuration functions When a BA368E Counter is supplied with alarms the configuration menu is extended as shown in Fig 16. The alarm functions appear after LoC clr, each alarm may be configured to operate on the rate or total display. For simplicity Fig 16 only shows the configurable functions on the rate option of alarm AL1, the total option is identical except that the total alarms can not have hysteresis. Configuration of alarm AL2 is identical to alarm AL1. The following table summarises each of the alarm configuration functions and includes a cross reference to more detailed information. Again only the functions on alarm AL1 are listed. Display Summary of function EnbL Alarm enable Enables or disables the alarm without changing the alarm parameters. See section 10.3.4 tYPE Type of alarm Defines whether the alarm operates on the rate or total display. See section 10.3.5 5P1r Alarm setpoint 1 or Adjusts the alarm setpoint. The 5P1t alarm is activated when the rate or total display equals the setpoint. Note: 5P1r is displayed for a rate alarm and 5P1t for a total alarm. See section 10.3.6 HI. LO Alarm function Defines whether the alarm has a high or low function. See section 10.3.7 no . nc Normally open or normally closed output. Determines whether the single pole alarm output is open or closed in the non-alarm condition. See section 10.3.8 H5tr Hysteresis Adjusts the alarm hysteresis. Only available on a rate alarm. See section 10.3.9 dELA Alarm delay time Adjusts the delay between the display equaling the setpoint and the alarm output being activated. See section 10.3.10 5IL Alarm silence time Defines the time that the alarm output remains in the non-alarm condition following acceptance of an alarm. See section 10.3.11 FL5H Flash display when alarm occurs When enabled, alternates the rate or total display between process value and alarm reference AL1 or AL2 when an alarm output is activated. See section 10.3.12 AC5P Access setpoint Sub-menu that enables direct access to the alarm setpoints from the display mode and defines a separate security code. See section 10.3.13 37

This function allows the alarm to be enabled or disabled without altering any of the alarm parameters. Using the & or * push button select AL1 or AL2 from the configuration menu and press ( to reach EnbL in the alarm sub-menu. Pressing ( will then reveal the existing setting. The function can be changed by pressing the & or * push button followed by the ) button to return to the alarm sub-menu. 10.3.5 Type of alarm: tYPE Alarm 1 and Alarm 2 are totally independent, both may be rate or total alarms, or one may be conditioned for rate and the other for total. Using the & or * push button select tYPE from the selected alarm sub-menu and press ( to check or change the function. The & or * push button will toggle the selection between rAtE and totAL, when set as required press the ) button to return to the alarm sub-menu. Note: When tYPE is changed, the alarm configuration is automatically reset to the default values and the alarm is disabled. It must therefore be reconfigured before use. 38

The rate alarm setpoints SP1r and SP2r may be positioned anywhere between 000000 and 999999, and the total alarm setpoint SP1t and SP2t anywhere between 00000000 and 99999999. All the setpoints are adjusted in the same way, for example, to adjust the setpoint of Alarm 1 which has been configured to operate on the rate display. Using the & or * push button select 5P1r in the AL1 sub-menu and press ( which will reveal the existing setpoint with one digit flashing. The required setpoint can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the 5P1r prompt in the alarm 1 sub-menu. 10.3.7 Alarm function: Hi. Lo Alarm 1 and Alarm 2 are totally independent, both may be Hi or Lo, or one may be conditioned as a Hi alarm and the other as a Lo alarm. Using the & or * push button select Hi. Lo from the selected alarm sub-menu and press ( to check or change the function. The & or * push button will toggle the alarm function between Hi and Lo, when set as required, press the ) button to return to the Hi. Lo prompt in the alarm sub-menu. 10.3.8 Alarm output status: no . nC Each single pole alarm output may be open or closed in the non-alarm condition. When the BA368E power supply is turned off or disconnected, the alarm output(s) will open irrespective of whether normally open or normally closed outputs have been selected. Therefore, when designing an alarm system normally closed nc should be selected so that the output opens when an alarm occurs or if the power supply fails. Using the & or * push button select no . nC from the selected alarm sub-menu and press ( to check or change the function. The & or * push button will toggle the contact status between no and nC, when set as required, press the ) button to return to the no . nC prompt in the alarm sub-menu 10.3.9 Hysteresis: H5tr Hysteresis is only available on rate alarms so the H5tr function only appears in the configuration sub- menu when alarm tYPE has been set to rAtE. During configuration hysteresis is shown in the units of rate previously configured for the rate display. Using the & or * push button select H5tr in the selected alarm sub-menu and press ( which will reveal the existing hysteresis with one digit flashing. The required hysteresis can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the H5tr prompt in the alarm sub-menu. e.g. A BA368E Counter configured to display a rate of 0 to 5000, with a high alarm set at 4000 and hysteresis of 100 will perform as follows: High alarm will be activated when rate equals or exceeds 4000, but will not reset until the rate falls below 3900. 10.3.10 Alarm delay: dELA This function enables activation of the alarm output to be delayed for a fixed time following the alarm condition occurring. The delay can be set in 1 second increments up to 3600 seconds. If a delay is not required zero should be entered. To adjust the delay select dELA using the & or * push button in the selected alarm sub-menu and press ( which will reveal the existing delay time in seconds with one digit flashing. The required delay time can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the dELA prompt in the alarm sub-menu. The alarm annunciator will start flashing immediately an alarm condition occurs and will continue for the delay time, after which the alarm output will be activated and the alarm annunciator will be permanently activated. 10.3.11 Alarm silence time: 5IL The alarm silence function is primarily intended for use in small installations where the alarm output directly operates an annunciator such as a sounder. When the alarm silence time is set to any figure other than zero, the ( push button becomes an alarm accept button. After an alarm has occurred, operating the ( button will cause the alarm output to revert to the non-alarm condition for the alarm silence time. When an alarm is silenced the alarm annunciator will flash until the silence time expires. To adjust the alarm silence time select 5iL using the & or * push button in the selected alarm sub- menu and press ( which will reveal the existing alarm silence time in seconds with one digit flashing. The required silence time can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the 5iL prompt in the alarm sub-menu. 39

FL5H In addition to the two alarm annunciators on the left hand side of the BA368E Counter display which show the status of both alarms, this function provides an even more conspicuous indication that an alarm has occurred. When enabled, this function alternates the rate or total display between the numerical value and the alarm identification AL1 or AL2 when an alarm occurs. Using the & or * push button select FL5H from the selected alarm sub-menu and press ( to check or change the function. The & or * push button will toggle the function between oFF and on, when set as required, press the ) button to return to the FL5H prompt in the alarm sub-menu. 10.3.13 Access Setpoint: AC5P This function activates a separate menu that provides direct access to the alarm setpoints from the display mode by simultaneously operating the ( and * buttons. An operator can therefore adjust the alarm setpoints without having access to the configuration and alarm sub-menus. Protection against unauthorised or accidental adjustment is provided by a separate security access code. Using the & or * push button select AC5P from the configuration menu and press ( to reach the enable function EnbL. Pressing ( will reveal the existing setting which can be toggled between on and oFF by pressing the & or * push button. When set as required, press the ) button to return to the EnbL prompt from which a separate security access code can be entered using the ACCd function which can be selected using the & or * push button. To enter a new security code select ACCd from the sub-menu and press ( which will cause the BA368E Counter to display 0000 with one digit flashing. The flashing digit may be adjusted using the & or * push button, when set as required operating the ( button will transfer control to the next digit. When all the digits have been adjusted press ) to return to the ACCd prompt. The revised security code will be activated when the BA368E Counter is returned to the display mode. Default security access code 0000 will disable the security code allowing direct access to the setpoints in the display mode by pressing the ( and * buttons simultaneously. Please contact BEKA associates sales department if the security code is lost. 10.3.14 Adjusting alarm setpoints from the display mode Access to the two alarm setpoints from the BA368E Counter’s display mode is obtained by operating the ( and * push buttons simultaneously as shown in Fig 17. If the setpoints are not protected by a security code the alarm setpoint prompt 5P1r or 5P1t will be displayed depending upon whether a rate or total alarm has been configured. If the setpoints are protected by a security code, CodE will be displayed first. Pressing ( again will allow the alarm setpoint security code to be entered digit by digit using the & and * buttons to adjust the flashing digit and the ( push button to move control to the next digit. If the correct code is entered pressing ) will then cause alarm setpoint prompt 5P1x to be displayed. If an incorrect security code is entered, or a button is not pressed within ten seconds, the instrument will automatically return to the display mode. Once within the menu pressing the & or * buttons will toggle the display between the two alarm setpoint prompts 5P1x and 5P2x. Fig 17 Setpoint adjustment from the display mode 40

press ( which will reveal the current setting. The flashing digit of the setpoint may be adjusted using the & or * push button and the ( button to move control to the next digit. When the required setpoint has been entered, pressing ) will return the display to the 5P1x or 5P2x2 prompt from which the other setpoint may be selected, or the instrument may be returned to the display mode by pressing ) again. Note: Direct access to the alarm setpoints from the display mode is only available when the AC5P menu is enabled - see section 10.3.13 10.4 Display backlight The BA368E Counter can be supplied with a factory fitted backlight that produce green illumination enhancing display contrast and enabling it to be read at night or in poor lighting conditions. The backlight is internally powered from the instrument power supply so that no additional wiring or intrinsically safe interface is required, but the supply current increases as shown below. BA368E Maximum current consumption Without backlight 10mA Additional for backlight 16mA Addition with terminals 3 & 4 linked 6mA Addition with terminals 7 & 8 linked 6mA ---------- Total current 38mA max 10.5 4/20mA output The BA368E Counter can be supplied with an optional factory fitted galvanically isolated 4/20mA output which may be configured to represent the rate or total display. 10.5.1 Intrinsic safety The 4/20mA output has been certified as a separate galvanically isolated intrinsically safe circuit complying with the requirements for simple apparatus. This allows terminals C1 and C3 to be connected to any intrinsically safe circuit protected by a certified Zener barrier or galvanic isolator providing the output parameters do not exceed: Uo = 28V dc Io = 200mA Po = 0.84W The maximum equivalent internal capacitance and inductance of the 4/20mA output is: Ci = 2.2nF Li = 4µH To determine the maximum permissible cable parameters, these figures should be subtracted from the maximum cable capacitance and inductance specified by the certificate for the Zener barrier or galvanic isolator powering the 4/20mA output circuit. 10.5.2 System design The BA368E Counter 4/20mA output is a passive current sink i.e. not powered, but it is totally isolated from all other Counter circuits. It is effectively a 2-wire 4/20mA transmitter requiring a minimum supply of 10V with its current being controlled by the BA368E Counter. Subject to complying with intrinsic safety interconnection requirements, the terminals C1 and C3 may be directly connected to another instrument located in the same hazardous area which will accept a 4/20mA transmitter input. The 4/20mA current output may also be transferred to the safe area via a galvanic isolator or Zener barriers. Fig 18 shows how a 2-channel Zener barrier may be used to transfer the 4/20mA current output into the safe area, alternatively a galvanic isolator may be used. 41

10.5.3 Configuration and calibration When a BA368E Counter is supplied with an optional 4/20mA output the configuration menu is extended as shown in Fig 19. The 4/20mA output sub-menu is accessed via the 4-20 oP function. The 4/20mA output sub-menu allows the 4/20mA output to be controlled by the rate or the total display. Fig 19 4/20mA output configuration sub-menu 10.5.4 Access 4/20mA output sub-menu: 4-20 oP Access the BA368E Counter configuration menu as described in section 6.2. Using the & and * push buttons scroll though the menu until 4-20 oP is displayed, pressing ( will then access the 4/20mA output sub-menu which is shown in Fig 19. 10.5.5 Enable 4/20mA output: EnbL This function allows the 4/20mA output to be disabled or enabled without altering any of the 4/20mA output parameters. Using the & or * push button select EnbL in the 4-20 oP sub-menu and press ( to reveal the existing setting on or oFF. The function can be changed by pressing the & or * push button followed by the ) button to return to EnbL prompt. Note: When the 4/20mA output is disabled by selecting oFF, the output is a constant 3.5mA irrespective of the instrument display. 10.5.6 Select rate or total source: 4-20tYPE The 4/20mA output current can represent the BA368E Counter’s rate or total display and this must be defined before any other 4/20mA current output functions are configured. Using the & or * push button select 4-20tYPE in the 4/20mA output sub-menu and press ( to reveal the existing setting totAL or rAtE. The function can be changed by pressing the & or * push button followed by the ) button to return to 4-20tYPE prompt. Note: If the controlling source of the 4/20mA output is changed i.e. from rate to total, the 4/20mA output will be disabled and the output will be a constant 3.5mA irrespective of the instrument display. The 4/20mA output must always be re- enabled and reconfigured following the controlling source being changed. 10.5.7 Display which corresponds to 4mA output: 4 . 000 The BA368E Counter display which corresponds to a 4.000mA output current is defined by this function. Using the & or * push button select 4 . 000 in the 4/20mA output sub-menu and press ( to reveal the existing rate or total display with one digit flashing. The required display can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the 4 . 000 prompt in the 4/20mA output sub-menu. 42

output: 20.000 The BA368E Counter display which corresponds to 20.000mA output current is defined by this function. Using the & or * push button select 20 . 000 in the 4/20mA output sub-menu and press (. to reveal the existing rate or total display with one digit flashing. The required display can be entered using the & or * push button to adjust the flashing digit and the ( button to transfer control to the next digit. When set as required press ) to enter the value and return to the 20 . 000 prompt in the 4/20mA output sub-menu. Note: If the BA368E Counter and the 4/20mA current sink output are powered from separate supplies, the 4/20mA output current will continue to flow when the BA368E Counter supply fails or is turned off. Powering both from a common supply eliminates this effect. 43

A1.1 IECEx Certificate of Conformity The BA368E Counter has been issued with an IECEx Certificate of Conformity number IECEx ITS 16.0004X which specifies the following certification code: Ex ia IIC T5 Ga -40ºC ≤ Ta ≤ +70ºC The IECEx certificate may be downloaded from www.beka.co.uk, www.iecex.com or requested from the BEKA sales office. A1.2 Installation The IECEx intrinsic safety parameters are identical to the ATEX safety parameters described in the main section of this manual and both refer to the same standards. Therefore the ATEX installation requirements specified in section 5 of this manual may be used for IECEx installations, but the local code of practice should also be consulted. A1.3 Special conditions for safe use The IECEx Certificate of Conformity number has an 'X' suffix indicating that special conditions apply to prevent an electrostatic charge developing on the outside of the instrument enclosure. WARNING To avoid an electrostatic charge being generated instrument enclosure should only be cleaned with a damp cloth. 44

installations in USA and Canada A2.0 cETL Mark For installations in the USA and Canada, the BA368E Two Input Counter has ETL and cETL intrinsic safety and nonincendive approval, Control Number 4008610. Copies of the Authorisation to Mark are available from the BEKA associates sales office and www.beka.co.uk A2.1 Intrinsic safety approval The US and Canadian standards used for assessment and certification of the BA368E Two Input Counter are listed on the cETL Authorisation to Mark. Installations must comply with BEKA associates Control Drawing CI330-52, which is attached to this appendix. The ETL safety parameters are the same as the ATEX and IECEx parameters, the systems shown in sections 3 and 4 of this manual may therefore also be used for US and Canadian installations subject to compliance with the local codes of practice. ETL and cETL intrinsic safety codes CL I Div 1 Groups A, B, C, D T5 (US IS gas, Div cert) CL II Div 1 Groups E, F, G. CL III (US IS dust, Div cert) CL I Zone 0 AEx ia IIC T5 Ga (US IS gas, Zone cert) Ex ia IIC T5 Ga (Canadian IS gas, Zone cert) -40ºC  Ta  70ºC A2.2 Nonincendive approval The BA367E Counter also has ETL nonincendive approval allowing installation in Division 2 hazardous (classified) locations without the need for Zener barriers or galvanic isolators. Installations must comply with BEKA associates Control Drawing CI330-53, which is attached to this appendix, and with the local codes of practice. ETL and cETL nonincendive codes US & Canada CL I Div 2 Groups A, B, C, D T5 CL II Div 2 Groups F, G CL III Div 2 -40ºC  Ta  70ºC 45