Trek 156A Operator's Manual

1445/JRB OPERATOR’S MANUAL MODEL 156A CHARGED-PLATE MONITOR 上海汇分电子科技有限公司 上海市闸北区天目西路511号锦程大厦1408室 联系方式：400-660-9565 网站：www.19mro.com

built to high standards to give you years of trouble-free service. If you have any questions, please feel free to contact your Trek Representative at: Write: TREK, INC. 190 Walnut Street Lockport, NY 14094-3710 Fax: (716) 201-1804 Telephone: In the United States: 1 800 FOR-TREK International Customers: 1 (716) 438-7555 Internet: www.trekinc.com E-Mail: [email protected] We welcome any comments or suggestions you may have relative to the operation, performance, and/or quality of this product. Trek products are covered by United States and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications are subject to change without notice. Copyright © 2014 TREK, INC. All rights reserved. Printed in the U.S.A.

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Safety Precautions for the Model 156A . . . . . . . . . . . . . . . . . . . . . v Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Section I Introduction General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I -1 Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I -2 Incoming Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I -2 Incoming Confidence Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I -3 Section II Installation Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-1 Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-1 Battery Charger/Eliminator Connection . . . . . . . . . . . . . . . . . . . . . . II-1 Initial Setup Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-2 Section III Operation Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-1 Rear Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-3 Float Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-4 Decay Mode Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-4 Programming Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-5 Programming the START voltage . . . . . . . . . . . . . . . . . . . . . . III-5 Programming the STOP voltage . . . . . . . . . . . . . . . . . . . . . . . III-6 Monitoring the Plate Voltage using the Output Monitor. . . . . . . . . . . . . . III-7 i

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-1 Section V Maintenance Safety Precautions for the Model 156A . . . . . . . . . . . . . . . . . . . . . . V-1 Battery Pack Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V-1 Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V-2 Customer Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . V-2 Service Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V-3 Appendixes Appendix A Accessories Appendix B Warranty Statement Appendix C Sales and Service ii Table of Contents

the instrument or equipment connected to it. The safety features of this instrument may be ineffective if the equipment is not operated in the manner stated in this manual. Refer all maintenance procedures to qualified personnel. Safety Precautions Power Observe polarity of connections and use appropriate battery eliminator ratings for voltage and current. Avoid Electric Overload To avoid electric shock or fire hazard, do not apply a voltage to a terminal that is outside the range specified for that terminal. Avoid Electric Shock To avoid electric shock, do not touch the charged-plate while the instrument is on. Do Not Operate Without Covers To avoid electric shock or fire hazard, do not operate this instrument with the covers removed. Fuses There are no user serviceable fuses inside this unit, please refer all problems to Trek, Inc. or an authorized Trek service center. iii ·

Indoor Use Only This instrument is intended for indoor use only. Do Not Operate in Wet or Damp Conditions To avoid electric shock, do not operate this instrument in wet or damp conditions. Do Not Operate in an Explosive Environment To avoid injury or fire hazard, do not operate this instrument in an explosive environment. Product Protection Precautions Use the Proper Power Source Do not operate this instrument from a power source that is different than the voltage specified on the serial number tag. Provide Proper Ventilation To prevent the instrument from overheating, provide proper ventilation. Do Not Operate with Suspected Failures If you suspect there is damage to this instrument, have it inspected by qualified personnel. iv Safety

Terms in the Manual These terms may appear in this manual: Warning: Warning statements identify conditions or practices that could result in injury or loss of life. Caution: Caution statements identify conditions or practices that could result in damage to this product or other equipment. Symbols on the Product These symbols may appear on the instrument: Warning, risk of electric shock Caution, refer to Operator’s Manual CAT I Installation category I (overvoltage category): Classification for the operation of a unit using voltage systems or circuits with required standardized limits for transient voltages. Category I pertains to voltages supplied at the peripheral level, with smaller tolerances for transient voltages as specified by the Low-Voltage Safety standard (EN 61010-1). This symbol refers to the compliance of the equipment to the European Council (E.C.) standards. v Safety

Please observe the following safety precautions when checking connections or providing maintenance procedures on the Model 156A: 1. Refer all maintenance procedures to qualified personnel. 2. Prior to performing maintenance procedures, turn off the 156A and disconnect the battery charger/eliminator from its power source. Failure to observe this precaution could result in an electrical shock. 3. Allow a cool-down period to reduce the danger of burns from heated parts such as transistors and heat sinks. 4. This instrument incorporates a rechargeable 7.2 V battery pack. Do not substitute a non-rechargeable battery because risk of fire or explosion could result. Please contact TREK, Inc. or an authorized service organization for battery replacement information. Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world. vi Safety

and contains the following chapters and appendixes: • Introduction contains a brief product description and describes an incoming confidence test for the unit. • Installation contains initial setup information for the Model 156A. • Operation contains a description of the product’s features and a detailed explanation of proper operating procedures. • Specifications states the requirements, behavior, and performance of the instrument in a concise format. • Maintenance contains proper care and preventative maintenance guidelines for the instrument. • Appendix A: Accessories describes other products that are useful with the Model 156A. • Appendix B: Warranty Statement describes terms and conditions of the Trek Warranty Statement. • Appendix C: Sales & Service contains Trek contact information. (Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world.) vii

supplies are not designed, rated, or qualified to be operated in an environment or atmosphere which contains combustible or explosive materials or gases which may be ignited by electrical discharges. This manual provides instructions to install and operate the Trek Model 156A Charged-Plate Monitor. We recommend you take the time to read this manual to take full advantage of the features and benefits of the instrument. General Information The Trek Model 156A Charged-Plate Monitor System is designed to provide quantitative and accurate measurements for a variety of air ionization tests in any location. The OUTPUT MONITOR connector on the rear panel is a buffered output providing a low-voltage replica of the voltage on the ion collecting plate. The Model 156A employs a revolutionary new charged-plate monitor design that utilizes an ultra-high-impedance high-voltage follower to monitor the ion collecting plate voltage. This technique provides very high accuracy and virtually infinite impedance loading of the plate, while allowing the ion collecting plate to be charged and monitored through the same small-diameter connection. This technique also makes the measurement capacitance independent of the physical size and shape of the ion collecting plate. Therefore, the size and shape of an ion collecting plate, as well as the measurement capacitance, may be customer specified to match a particular ESD-sensitive device within a manufacturing process, or it may be made to conform to the ESD Association Standard ANSI/ESD-STM3.1. I - 1

The Model 156A features three primary modes of operation: a negative (-) decay mode, a positive (+) decay mode, and a float mode. Decay mode START and STOP voltages are easy to program. For DECAY mode operation, the ion collecting plate is precharged, either positively or negatively, to a level above the programmed START voltage. The time required to discharge the ion collecting plate from the programmed START voltage to the programmed STOP voltage is measured by the Model 156A. The discharge is due to ‘incident ion flow’ on the ion collecting plate. For the FLOAT mode operation, the plate is initially discharged to zero and then allowed to float to the voltage level dictated by ‘incident ion flow’ on the ion collecting plate. The simplicity of the design of the 156A makes it very reliable and completely portable. The 156A is powered by a rechargeable battery (supplied) that offers 8 hours of operation from a full charge. The unit can also be operated from a line supply using a battery eliminator/charger. Caution: This instrument incorporates a rechargeable 7.2 V battery pack. Do not substitute a non-rechargeable battery because risk of fire or explosion could result. Please contact TREK, Inc. or an authorized service organization for battery replacement information. Incoming Inspection Visually inspect the instrument for physical damage such as dents, nicks, scratches, broken fittings, etc. External damage may indicate more serious damage has occurred within the instrument. In the event of damage, notify the factory or your nearest authorized Trek Service Organization and request instructions. Attempts to operate a damaged instrument may cause permanent damage to the instrument. I - 2 Introduction Warning: Hazardous voltages may be present on ion plate during Decay mode operation.

The 156A undergoes extensive checks and adjustments at the factory, and no initial calibration should be required. However, you may wish to perform an incoming confidence test as part of the incoming inspection on the instrument. An incoming confidence test of this nature is intended to confirm that the instrument was not damaged in transit. We recommend that you familiarize yourself with the information in Section II and Section III before performing this test. Placing a charged object near the ion collecting plate while the instrument is in the DECAY mode and measuring the decay time of the object would constitute a reasonable incoming confidence test. A simple source for a charged object is an ordinary pocket comb or a hard plastic screw driver. A pocket comb drawn through the hair will usually produce a negative charge on the comb. A hard plastic handle of a screw driver brushed against a pant leg will usually produce a positive charge on the handle of the screw driver. Warning: Do not turn on the 156A until instructed to do so. To do so before the appropriate point in time could result in an electrical shock and/or damage to the instrument. 1. Ensure the power is OFF. 2. Connect the ion collecting plate to the ION COLLECTING PLATE connector on the rear panel. 3. Connect the GROUND jack to earth ground using the banana-alligator cable provided. 4. Place the MODE switch in the +DECAY position. 5. Turn on the power. 6. Momentarily press down on the TEST/RESET switch. 7. Move a negatively charged object (pocket comb) towards the ion collecting plate until the value indicated on the PLATE VOLTAGE display decreases below the programmed decay start voltage. The decay timer will start when the plate voltage passes the programmed decay start voltage. Note: The decay start voltage is factory programmed for 1000 V. (See ‘Programming the START voltage’ on page III-4 for information on changing the I - 3 Introduction 直到指示这样做的156A不要打开。这样做的时间的适当位置，可能会导致电击和/或损坏仪器之前。

8. Continue to move the negatively charged object towards the ion collecting plate until the value indicated on the PLATE VOLTAGE display passes through the programmed decay stop voltage. Note: The decay stop voltage is factory programmed for 100 V. (See ‘Programming the STOP voltage’ on page III-5 for information on changing the decay stop voltage.) At the programmed stop voltage the decay timer will stop and the decay time will be indicated on the DECAY TIME display. This completes the incoming confidence test. Turn OFF the 156A. I - 4 Introduction

Mounting The Model 156A is designed to be operated as a portable benchtop instrument. There are no special mounting requirements. Battery Operation Initially charge the 156A for 3 hours before operating the instrument. The FULL CHARGE indicator will illuminate when the battery is fully charged. The 156A will operate for at least 8 hours with a full charge. The LOW BATTERY indicator will illuminate when the battery is approximately 30 minutes from total discharge. Caution: This instrument incorporates a rechargeable 7.2 V battery pack. Do not substitute a non-rechargeable battery because risk of fire or explosion could result. Please contact TREK, Inc. or an authorized service organization for battery replacement information. Battery Charger/Eliminator Connection The Model 156A is designed to be battery operated or operated while connected to a line voltage source. A battery charger/eliminator is available for all nominal line voltages. 1. Ensure the power is OFF. 2. Plug the battery charger/eliminator to the CHARGER receptacle on the rear panel. 3. Plug the free end of the AC line cord into the power source. II - 1 Figure 2-1: Battery Charger/Eliminator connector polarity.

Before operating the Model 156A, the following connections should be made: Ground Connection The Model 156A must be connected to a solid ground reference to ensure accurate and repeatable measurements. All voltage measurements will be made with respect to this ground reference point. The power to the unit should be OFF when connecting the ground on the rear panel of the unit to a ground reference. Ion Collecting Plate Connection Ensure that the power to the unit is OFF when connecting the plate cable to the ION COLLECTING PLATE receptacle on the rear panel. Note: Hazardous voltages may exist in the plate receptacle if the power to the unit is ON. See warning below under OUTPUT MONITOR CONNECTION. Output Monitor Connection Warning: Exercise extreme caution while connecting a BNC connector cable to the OUTPUT MONITOR BNC receptacle. Do not confuse the OUTPUT MONITOR BNC cable connector for the ION PLATE BNC cable connector. Inserting the OUTPUT MONITOR connector into the ION PLATE connector could deliver a voltage of 1100 volts to the BNC shell. The OUTPUT MONITOR connector on the rear panel is a buffered output providing a low-voltage replica of the voltage on the ion collecting plate. The voltage at this output represents 1/200th the voltage on the ion collecting plate. Connect a monitoring device, such as an oscilloscope, to this connector to monitor the voltage on the ion collecting plate. The signal at this connector can also be used as a feedback signal in a closed-loop system. II - 2 Installation

Front Panel Features Figure 3-1: Front Panel Features 1. FULL CHARGE Indicator: This indicator will illuminate when the battery is fully charged. At least 8 hours of operation can be expected from a fully charged battery. 2. MODE Switch: This switch selects either the (+) DECAY, the (-) DECAY or the FLOAT mode of operation. This switch is also used in combination with the TEST/RESET switch to program the start and stop voltages. 3. LOW BATTERY Indicator: This indicator will illuminate when the battery is 4. POWER Switch: This switch turns the power ON and OFF and may enable Warning: The Model 156A is battery operated and high-voltage may be present at the ion collecting plate or ion plate connector whether or not the battery charger/eliminator is connected to the rear panel when the POWER switch is III - 1 CHARGED PLATE MONITOR SYSTEM VOLTS VOLTS MODEL 156A PLATE VOLTAGE PLATE VOLTAGE SECONDS SECONDS DECAY TIME DECAY TIME DECAY FLOAT RESET TEST / MODE DECAY FULL CHARGE BATTERY LOW POWER 4 3 2 1 initial high-voltage to the plate. ON. approximately 30 minutes from being fully discharged。

Figure 3-2: Front Panel Features (cont.) 5. 6. DECAY TIME Display: This digital display indicates the time in seconds for the ion collecting plate to discharge from the programmed START voltage to the 7. TEST/RESET Switch: This switch sets the plate voltage to greater than the programmed START voltage when the instrument is in the (+) DECAY or (-) DECAY mode. This switch sets the plate voltage to 0 volts when the instrument is in the FLOAT mode. This switch is also used in combination with the MODE switch to program the START and STOP voltages. III - 2 Operation CHARGED PLATE MONITOR SYSTEM VOLTS VOLTS MODEL 156A PLATE VOLTAGE PLATE VOLTAGE SECONDS SECONDS DECAY TIME DECAY TIME DECAY FLOAT RESET TEST / MODE DECAY FULL CHARGE BATTERY LOW POWER 7 6 5 PLATE VOLTAGE Display: This digital display indicates the plate voltage in volts. programmed STOP voltage.

Figure 3-3: Rear Panel Features 1. OFFSET ADJUST: This adjustment minimizes plate voltage drift. The calibration is 2. CHARGER/SUPPLY Receptacle: This receptacle is for connection of the battery 3. 4. OUTPUT MONITOR Connector: This BNC provides a buffered, low-voltage replica of the voltage on the ion collecting plate. The voltage at this output is 1/200th of the voltage on the ion collecting plate. Warning: Exercise extreme caution while connecting a BNC connector cable to the OUTPUT MONITOR BNC receptacle. Do not confuse the OUTPUT MONITOR BNC cable connector for the ION PLATE BNC cable connector. Inserting the OUTPUT MONITOR connector into the ION PLATE connector could deliver a voltage of 1100 volts to the BNC shell. 5. ION COLLECTING PLATE Receptacle: This BNC receptacle is for connection of Warning: The Model 156A is battery operated and high-voltage may be present at the ion collecting plate or ion plate connector whether or not the battery charger/eliminator is connected to the rear panel when the POWER switch is ON. III - 3 Operation OFFSET ADJUST 200 TO 1 PLATE 12VDC / 1A GROUND MONITOR COLLECTING CHARGER/SUPPLY OUTPUT ION 5 4 3 1 2 factory set and should not need adjustment. eliminator/charger. GROUND Jack: This banana jack is for connection to a ground reference point. the ion collecting plate.

In the FLOAT mode, the 156A monitors the voltage on the plate caused by air ion imbalance. 1. Place the ion collecting plate in the area to be monitored. 2. Place the MODE switch in the FLOAT mode. 3. Press down and release the TEST/RESET switch to apply 0 volts to the plate. Upon releasing the TEST/RESET switch, the plate will “float” to a voltage as dictated by air ion imbalances. DECAY Mode Operation In the positive (+) DECAY and negative (-) DECAY modes, the 156A monitors the time taken for the ion collecting plate to decay from the programmed START voltage to the programmed STOP voltage. 1. Place the ion collecting plate in the area to be monitored. 2. Place the MODE switch in either the positive (+) DECAY or negative (-) DECAY mode: In the positive (+) DECAY mode the ion collecting plate is charged to a positive voltage. In the negative (-) DECAY mode the ion collecting plate is charged to a negative voltage. 3. Press and release the TEST/RESET switch. The ion collecting plate will charge to a value slightly greater than the programmed START voltage. The decay timer will start when the plate voltage reaches the programmed START voltage. The decay timer will stop when the plate voltage reaches the programmed STOP voltage. III - 4 Operation

the (-) DECAY mode, and the FLOAT mode. Note: When the instrument is first turned on, it will indicate the revision level of the program in the DECAY TIME display. The unit will also flash the (previously) programmed START voltage in the PLATE VOLTAGE display and the (previously) programmed STOP voltage in the DECAY TIME display. The START and STOP voltages are initially factory set to 1000 V and 100 V, respectively. Programming the START voltage 1. Ensure the power is OFF. 2. Place the MODE switch to the FLOAT position. 3. Press and hold down the TEST/RESET switch. Keep the switch down when turning ON the POWER switch. 4. After the POWER switch is turned on, the letter ‘S’, representing START voltage, appears in the PLATE VOLTAGE display. 5. Release the TEST/RESET switch. The DECAY TIME display will indicate the present START voltage. 6. Place the MODE switch in the positive (+) DECAY position to increase the START voltage. The START voltage will automatically increase in 1 volt increments. Place the MODE switch in the negative (-) DECAY position to decrease the START voltage. The START voltage will automatically decrease in 1 volt increments. Select the voltage value desired for testing. When the desired START voltage parameter is obtained, place the MODE switch in the FLOAT position. Note: The START voltage cannot be set above 1000 V or below the programmed STOP voltage. III - 5 Operation DECAY FLOAT RESET TEST / MODE DECAY

Programming the STOP voltage 1. After the START voltage has been programmed, press and hold down the TEST/RESET switch. The letter “E”, representing “END” (STOP) voltage, appears in the PLATE VOLTAGE display. 2. Release the TEST/RESET switch. The DECAY TIME display will indicate the present STOP voltage. 3. Place the MODE switch in the positive (+) DECAY position to increase the STOP voltage. The STOP voltage will automatically increase in 1 volt increments. Place the MODE switch in the negative (-) DECAY position to decrease the STOP voltage. The STOP voltage will automatically decrease in 1 volt increments. Select the voltage parameter desired for testing. When the desired START voltage is obtained, place the MODE switch in the FLOAT position Note: The STOP voltage cannot be set above the programmed START voltage or below 0 V. 4. Press and hold down the TEST/RESET switch. The letter “P”, representing ‘PROGRAM’, appears in the PLATE VOLTAGE display. Release the TEST/RESET switch. The 156A stores the new settings for START and STOP voltages and resets itself to begin testing for the newly chosen parameters. The 156A will display the ‘revision level’ of the command program and then will flash the new START voltage in the PLATE VOLTAGE display and the new STOP voltage in the DECAY TIME display. The unit will then go into the normal operating mode as set by the MODE switch. III - 6 Operation

The OUTPUT MONITOR receptacle provides a low-voltage replica of the plate voltage. The OUTPUT MONITOR voltage is 1/200th of the plate voltage. The OUTPUT MONITOR can be connected to an oscilloscope for visual representation of the ion tests. For example, if the plate voltage is 500 V, the voltage at the OUTPUT MONITOR receptacle would be: 500 V x 1 V/200 V = 2.5 V. III - 7 Operation

DANGER: This instrument is not rated for use in an explosive environment. DO NOT use it an explosive environment or an explosion may result. PERFORMANCE Monitored Voltage Range 0 to ±1100 V DC or peak AC. Small Signal Bandwidth (-3 dB) DC to 1 kHz (measured at 20 V p-p). Large Signal Bandwidth DC to 10 Hz (measured at 2000 V p-p). Zero Stability (referred to plate voltage) Drift with Time (no incident ion flow) Less than 6 V/minute. Drift with Temperature Less than 10 mV/°C, noncumulative. Decay Mode Thresholds Start Voltage Programmable from 1 to ±1000 V in 1 V increments. Start Accuracy Within ±1 V of programmed start voltage. IV - 1

Stop Voltage Programmable from 0 to ±999 V in 1 V increments. Stop Accuracy Within ±1 V of programmed stop voltage. Plate Self-Discharge Less than 12 V/minute. (unpolarized) FEATURES Power On/Off A two-position rocker switch. Test/Reset Control A momentary toggle switch used in conjunction with the Mode Select Switch to program the START and STOP voltages. +Decay and -Decay Modes Set the plate voltage to a value greater than the programmed start voltage and reset the decay timer to zero. Float Mode Sets the plate voltage to 0 V ±2 V. Voltage Monitor Output A BNC providing a low voltage replica of the plate voltage. Scale Factor 1/200th of the plate voltage. DC Accuracy Better than 0.1% of full scale. Offset Voltage Less than ±10 mV. Output Noise Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter). Output Impedance Less than 0.1 ohm. IV - 2 Specifications

3 ½ digit red LED display. Range 0 to ±1100 V. Resolution 1 volt. Accuracy Better than 0.1% of full scale, ±1 count. Decay Time Digital Panel Meter 4-digit red LED display. Range 0 to 9999 seconds. Resolution 0.1 seconds, from 0 to 999.9 seconds; 1 second, from 1000 to 9999 seconds. (The display will indicate “- - - -” when the decay time exceeds 9999 seconds.) Ion Collector Plate Standard Option Meets ESD Association Standard ANSI/ESD-STM3.1 requirements for: Dimensions 15.3 cm x 15.3 cm square, (6² x 6² square). Capacitance 20 pF ±2 pF. Non-standard Option Dimensions Specify when ordering. Capacitance Specify when ordering. Mode Select A three-position toggle switch that selects the +Decay, the -Decay, or the Float mode of operation. This switch is also used in combination with the Test/Reset Control switch to program the start and stop voltages. IV - 3 Specifications

line voltages. Contract Trek, Inc. or an authorized service organization for more information. NOTE: If line impulses exceed 500 V when using the battery eliminator/charger, the unit may reset and require operator assistance Specifications Output Connector 2.1 mm DC power plug. Output Voltage 12 to 14 V DC. Output Current 1 A. Battery Operation Rechargeable battery supplied. Operating Time 8 hours with full charge. Recharge Time 3 hours to full charge. Other Low battery indicator. Full charge indicator. Operating Conditions Temperature 5 °C to 35 °C. Relative Humidity To 80%, noncondensing. IV - 4 Specifications

(3.25" H x 12.5" W x 11" D). Instrument Weight 2 kg (4.4 lb). Voltage Monitor Connector BNC coaxial connector. (3 meter length, maximum.) Ground Receptacle Banana jack. Battery Eliminator/ Charger Receptacle 2.1 mm DC power plug. Cable from Instrument to Floating Plate Coaxial type. Diameter 4.95 mm (0.195") or 2.6 mm (0.102"). Length 3 m (10 ft), nominal. IV - 5 Specifications

Certification TREK, INC. certifies that each Model 156A is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory. Low Voltage Safety Compliance EN 61010-1 Overvoltage Category CAT I: Peripheral level outputs (less than 60 volts). Pollution Category Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs. IV - 6 Specifications

Safety Precautions for the Model 156A Please observe the following safety precautions when checking connections or providing maintenance procedures on the Model 156A: 1. Refer all maintenance procedures to qualified personnel. 2. Prior to performing maintenance procedures, turn off the 156A and disconnect the battery charger/eliminator from its power source. Failure to observe this precaution could result in an electrical shock. 3. Allow a cool-down period to reduce the danger of burns from heated parts such as transistors and heat sinks. 4. This instrument incorporates a rechargeable 7.2 V battery pack which is not user serviceable. Do not substitute a non-rechargeable battery because risk of fire or explosion could result. Please contact TREK, Inc. or an authorized service organization for battery replacement information. Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world. Battery Pack Maintenance The Model 156A is equipped with a rechargeable battery pack. Periodic cycling (complete charge and discharge) of the battery pack is required in order to maximize the life and capacity of the battery pack. Trek, Inc. recommends cycling the battery pack at least once a month. Cycling of the battery pack can be accomplished by following the procedure below. 1) Plug the battery eliminator/charger into the Model 156A. 2) Charge the battery pack until the “Full Charge” indicator on the Model 156A is illuminated. 3) Remove the charger from the Model 156A. 4) Turn the power to the Model 156A on. V - 1

5) Leave the Model 156A “ON” for more than 12 hrs. 6) Plug the battery eliminator/charger into the Model 156A. 7) Charge the battery pack until the “Full Charge” indicator on the Model 156A is illuminated. 8) Cycling is completed. Note: An apparent loss of capacity for the battery pack (“Memory Effect”) might be noticed if the battery pack is left on charge, for a long period of time. This effect can be reversed by cycling the battery pack 1-3 times. Preventative Maintenance Preventative maintenance consists of inspecting and cleaning the instrument. Preventative maintenance performed on a regular basis may prevent instrument failure and improve reliability. INSPECTION: Visually inspect the instrument for loose or damaged controls and connectors or other undesirable conditions. CLEANING: Clean the 156A as operating conditions require. Clean the exterior of the instrument with a damp cloth. The use of solvents may damage the finish or plastic components. A small brush is effective in removing dirt from the front and rear panel controls and connectors. Customer Service Assistance In the event that you require assistance on a maintenance item, direct your request for assistance to the Customer Service Group at Trek, Inc. or an authorized Trek Service Organization. Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world. Telephone assistance is usually effective for obtaining additional maintenance information which is beyond the scope of this manual. Troubleshooting advice which is given over the telephone may be useful for solving the simpler malfunctions or confirming that the system should be returned to the factory or to an authorized Trek Service Organization. V - 2 Maintenance

period by anyone other than Trek, Inc. or one of its authorized service organizations. In the event of a malfunction, and the instrument must be returned for repair: 1. Notify the Customer Service Group at Trek, Inc., giving full details about the difficulty, including the model number and serial number of the instrument. The Customer Service Group will issue a return authorization number. 2. Forward the instrument (prepaid), with the return authorization number prominently displayed on the shipping container and the packing list, to Trek, Inc. The instrument may also be returned to an authorized Trek Service Organization. Contact the service organization nearest to you for details. Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world. V - 3 Maintenance

Item Part Number Operator’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23103 Nine (9) ft. Banana to Banana stackable cord (2.7 meter.) . . . . . . . . . N9044 OPTIONAL ACCESSORIES Item Part Number Ion Collecting Plate Tripod . . . . . . . . . . . . . . . . . . . . . . . . DK142 AC Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F5054R Carrying Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43433 ION COLLECTING PLATES Item Part Number STANDARD PLATES Model 156AP C150x150-R3M (6²x 6², Meets ESD Association Standard ANSI/ESD-STM3.1) . . . . . 17397 Model 156P C25x25-S3M (1² x 1²) . . . . . . . . . . . . . . . . . . . . 17375 SPECIAL PLATES Contact TREK, INC. or an authorized sales organization for applications that require a different size or shape ion collecting plate. Accessories - 1

New instruments sold by TREK, INC. (hereinafter called the “Company”) are warranted only as stated below: Subject to the exceptions and upon the conditions specified below, the Company agrees to correct, either by repair, or in the Company’s sole discretion, by replacement, any defect of material or workmanship which develops within one year from the date of original purchase by the customer (user), provided that investigation and factory inspection by the Company discloses that such defect developed under normal and proper use. Repair or replacement are the exclusive remedies under this warranty (batteries are not included under this warranty). The exceptions and conditions mentioned are as follows: (a) The Company makes no warranty concerning components or accessories not manufactured by itself. (b) The Company is released from all obligations under this warranty in the event that repairs or modifications are made by persons other than its own or authorized personnel, unless such repairs by others are made with the prior written consent of the Company. In the event of a failure, and the customer neglects to take prompt and reasonable actions to prevent further damage, the Company cannot be responsible for consequent damage. (c) THERE ARE NO OTHER WARRANTIES WHICH EXTEND BEYOND THOSE EXPRESSLY PROVIDED FOR HEREIN AND THE AFORESAID WARRANTY AND THE COMPANY’S OBLIGATIONS AND LIABILITIES THEREUNDER ARE IN LIEU OF, AND CUSTOMER WAIVES ALL OTHER WARRANTIES AND GUARANTEES AND ALL OTHER LIABILITIES THEREFORE, EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND ALL OBLIGATIONS AND LIABILITIES WITH RESPECT TO LOSS OF USE, REVENUE OR PROFIT, OR INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES OF ANY KIND AND FROM ANY CAUSE WHATSOEVER ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE MANUFACTURE, SALE, HANDLING, REPAIR, MAINTENANCE OR REPLACEMENT OF SAID PRODUCTS. (d) Representation and warranties made by any person, including dealers and representatives of the Company, which are inconsistent or in conflict with the terms of this warranty (including, but not limited to, the limitations of the liability of the Company as set forth above), shall not be binding upon the Company unless reduced to writing and approved by an officer of the Company. (e) This warranty shall be governed by the laws of the State of New York. Warranty - 3

Please go to our web site: www.trekinc.com for a complete list of our sales and service representatives and distributors located in the United States and throughout the world. Trek Contact Information: TREK, INC. 190 Walnut Street Lockport, NY 14094-3710 USA Fax: (716) 201-1804 Telephone: 1 800 FOR-TREK 1 (716) 438-7555 Internet: www.trekinc.com E-Mail: [email protected] Trek Japan KK Motobayashi Building 1-2-12 Nihonbashi-ningyocho, Chuo-ku Tokyo, 103-0013, Japan Fax: 81 3 6264 8693 Telephone: 81 3 6264 8692 Internet: www.trekj.com E-Mail: [email protected] Sales - 1

上海汇分电子科技有限公司 上海市闸北区天目西路511号锦程大厦1408室 联系方式：400-660-9565 网站：www.19mro.com