Tegam AVM-2000 Instruction And Service Manual Download Page 1

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10 TEGAM WAY • GENEVA, OHIO 44041 440-466-6100 • FAX 440-466-6110 • www.tegam.com

AVM-2000

HIGH SENSITIVITY ANALOG DC VOLTMETER/NULLMETER

Instruction and Service Manual

PN# AVM2000-900

Publication Date: October 2010

REV. B

Summary of Contents for AVM-2000

Page 1: ...AM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 www tegam com AVM 2000 HIGH SENSITIVITY ANALOG DC VOLTMETER NULLMETER Instruction and Service Manual PN AVM2000 900 Publication Date October 2010...

Page 2: ...meters handheld temperature calibrators thermometers humidity and temperature control devices and more TEGAM also repairs and calibrates test and measurement equipment formerly manufactured by Electr...

Page 3: ...y information 1 8 TEGAM contact information 1 8 II Preparation for Use and Installation Unpacking Inspection 2 1 Recommended Operating Environment 2 1 III Principles of Operation AVM 2000 measurement...

Page 4: ...practices that could result in damage to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life Terms as Marked on Equ...

Page 5: ...operator to choose signal filtering from 0 1 to 100 seconds to improve measurements An OFFSET feature allows the user to offset a wide range of input voltages An OPERATE ZERO switch allows the user to...

Page 6: ...ted range Analog Meter Accuracy1 Scaling Linearity Resolution 2 of full scale of selected range Mirrored zero center 10 0 10 and 3 0 3 1 of full scale of selected range 1 of full scale of selected ran...

Page 7: ...ZERO OPERATE Mode Input Offset Mode and Isolated Output Mode Dimensions 6 5 H X 11 5 W X 13 5 D Weight 22 5 lbs Connectors Low thermal EMF input terminals plus guard Two output Binding Posts plus a t...

Page 8: ...into the fuse holder Reinstall the fuse by simply pushing the fuse drawer back into its original position The fuse drawer should snap into place Grounding the Equipment ISOLATED OUTPUT Two Red and Bla...

Page 9: ...1000 Volts DC AC RMS and 10 A 1 A DC such as Fluke model 5100 or 5720 Multi Product Calibrator Precision DMM with range of 0 to 1000 V DC and AC RMS such as Fluke model 8508A Keithley 2002 or Agilent...

Page 10: ...ortance a detailed written description of the problem should be attached to the instrument Many times repair turnaround is unnecessarily delayed due to a lack of repair instructions or of a detailed d...

Page 11: ...he processing and repair process RMA Instrument Model Serial Number Company Technical Contact Phone Number Additional Contact Info Repair Instructions Evaluation Calibration Only Repair Only Repair Ca...

Page 12: ...is to a location within the country in which the TEGAM service center is located The customer shall be responsible for paying all shipping duties taxes and additional costs if the product is transpor...

Page 13: ...Use in Proper Environment Normal calibration laboratory practice dictates that the environment should be closely controlled This will minimize errors introduced by temperature and humidity changes A...

Page 14: ...ays or is attenuated to be compliant with the input amplifier s dynamic range and then applied to the input amplifier 3mV 1000V On all ranges all stages of the input amplifier allow sufficient head ro...

Page 15: ...vement This meter provides a high resolution readout with both 10 0 10 and 3 0 3 scales A second 20 bit digital to analog converter output is sent to a buffer amplifier This output is normalized to 1...

Page 16: ...Charge VARIABLE CONTROL LOCK Status of variable control locks FILTER Filter times from 0 1 s to 100 s in 1 2 5 sequence Power ON indication is also on the LCD display indicating the amount of battery...

Page 17: ...ILTER pushbuttons allow the user to increase or decrease the filter setting Filter integration time is shown on the LCD The available filters 0 1 0 2 0 5 1 2 5 10 20 50 and 100 seconds An input signal...

Page 18: ...ing as displayed on the LCD is replaced with ZERO In the OPERATE mode the voltage to be measured is applied to the input amplifier and the displayed output voltage is the sum of the input voltage and...

Page 19: ...input offset current The control s locked unlocked status is shown in an adjacent area of the status LCD A closed padlock indicates locked status Either V or I indicate unlocked status NOTE with the...

Page 20: ...the over voltage condition is transient in nature and the voltage spikes are very high due to inductive spiking For this reason great care should be taken when using the instrument in high sensitivit...

Page 21: ...0 and allow for normal instrument warm up 2 Set the Filter to 2 0 sec a Press the Filter push button s until the display shows 2 0 sec b Other Filter ranges may be used but 2 0 sec is the optimal for...

Page 22: ...ecause that is the impedance of the Fluke 845 and familiar to most users and calibration procedures The user can select the desired impedances at this point It is important to note that a separate zer...

Page 23: ...st be disconnected as the first step in any disassembly process CAUTION Follow ESD ELECTROSTATIC DISCHARGE Procedures when handling the AVM 2000 printed circuit boards and their components POWER SUPPL...

Page 24: ...the front and rear panels Slide the top cover vertically from the instrument 4 With the top cover removed disconnect the 3 pin battery cable J3 from the power supply board 5 Disconnect the 10 pin cabl...

Page 25: ...n V Maintenance and Servicing NOTE Failure to keep components and or the printed circuit board in the Isolated Analog Section clean of contaminants may compromise the performance of the AVM 2000 Avoid...

Page 26: ...Digital Multimeter HI and LO INPUT terminals to AVM 2000 rear panel and terminals observe polarity 5 Set the Digital Multimeter FUNCTION for DCV and AUTO range If AVM 2000 LCD OFST indication is not 0...

Page 27: ...e again with the short attached AVM 2000 could be damaged if a reference voltage is selected with a short attached 20 Connect a short between AVM 2000 HI and LO terminals 21 Press AVM 2000 OUTPUT LEVE...

Page 28: ...M WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 www tegam com 5 6 Section V Maintenance and Servicing 30 Disconnect the Digital Multimeter and remove the short connected to AVM 2000 HI and LO te...

Page 29: ...ange of AVM 2000 a Manual Range Zero of the AVM 2000 i Set the Meter Calibrator for zero VDC and set the OPR STBY switch to OPR ii If required select AVM 2000 IMPEDANCE ZERO function using the OPERATE...

Page 30: ...librator in OPR 13 Press the Meter Calibrator OFFSET button 14 Set the Meter Calibrator for 1 VDC 15 Edit the Meter Calibrator output amplitude until AVM 2000 analog meter indicates full scale 16 Pres...

Page 31: ...nect test setup 36 Connect equipment as follows a Connect AVM 2000 HI to Current Shunt Potential and the LO to the Potential b Connect the Meter Calibrator HI to the Current Shunt 10 A c Connect Meter...

Page 32: ...AVM 2000 except set the Meter Calibrator for 0 mA DC and leave the Meter Calibrator in OPR 5 Edit the Meter Calibrator output amplitude until the Digital Multimeter indicates 0 000 0 003 VDC 6 Press...

Page 33: ...10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 www tegam com 5 11 Section V Maintenance and Servicing 16 Disconnect test setup...

Page 34: ...b to select the place value and the OFFSET buttons to select the numerical value adjust TI OFST value for a null indication on AVM 2000 analog meter 8 The AVM 2000 OFST value must be within 27 150 00...

Page 35: ...100 m 98 0 to 102 0 m 300 m 300 m 294 0 to 306 0 m 1 1 0 980 to 1 020 3 3 2 940 to 3 060 10 10 9 80 to 10 20 30 30 29 40 to 30 60 100 100 98 0 to 102 0 300 300 294 0 to 306 0 1000 1000 980 0 to 1020...

Page 36: ...rocessor based subsystems Any component level troubleshooting requires access to software development tools and the accompanying interfaces to connect the software development system to the two microp...

Page 37: ...ving connector J4 If the fuse continues to blow disconnect the battery J3 and measure the open circuit battery voltage If the open circuit battery voltage lies between 5 3 and 7 0 volts the Power Supp...

Page 38: ...to charge the battery Disconnect the battery and measure its open circuit voltage If the open circuit battery voltage lies between 5 3 and 7 0 volts the Power Supply Subsystem is defective Action Repl...

Page 39: ...stem If not above rotate the AVM 2000 RANGE control to the 100 mV range and apply a 100 mV DC input signal to the AVM 2000 Using an oscilloscope or pulse detecting logic probe check for serial communi...

Page 40: ...the appropriate DC signal i e a scaled 1 volt for full scale meter deflection at connector J4 pin 2 or TP8 of the Front Panel Subsystem If the signal is present at J4 pin 2 or TP8 the output cable is...

Page 41: ...ource of charging current disconnected 3 Reconnect the power adaptor 4 Turn the instrument ON 5 Verify the problem continues to exist 6 Depress and hold the RANGE control until the LCD reads METER OFF...

Page 42: ...y information on the performance of the AVM 2000 2 Use the original packaging materials or a strong shipping container The carton must be both large enough and strong enough to accommodate the power m...

Page 43: ...e controlled location If instrument is to be stored in excess of 90 days place desiccant with items before sealing container The safe environmental limits for storing the AVM 2000 are 20 to 60 C 0 80...

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