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Tegam AVM-2000, Инструкция по эксплуатации и обслуживанию

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

5-4 

Section V – Maintenance and Servicing 

Calibration Verification (Preliminary Calibration Operations) 

 

1.

 

Connect test equipment to appropriate power sources, set POWER switches to ON and allow a 
warm-up period (Suggest 4 hours). 

 
NOTE: Recommend use of low-thermal EMF shielded test leads (solid copper wire or solid copper wire with 

gold plated spade terminals). 
 

NOTE: Before continuing, ensure AVM-2000 has been connected to external power for a minimum of 20 
hours. 

 

2.

 

With AVM-2000 POWER switch set to OFF, disconnect AVM-2000 from external power source and 
mechanically zero AVM-2000 meter. 

 

NOTE:

 

The AVM-2000 must remain at the same tilt level during warm-up and throughout the Calibration 

Process. 
 

3.

 

Set AVM-2000 POWER switch to On, ensure AVM-2000 indicates a fully charged battery and allow a 
one hour warm-up period. 

 

4.

 

Connect the 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 00,000.00 

μ

V, using the INPUT OFFSET knob to select the 

place value and the OFFSET 

▼

 

▲

 buttons to select the numerical value, set OFST: indication to 

00,000.00 

μ

V. 

 

6.

 

Press AVM-2000 INPUT OFFSET knob until V is displayed. Press and hold AVM-2000 INPUT OFFSET 
knob for approximately 5 seconds. 

 

7.

 

Press AVM-2000 INPUT OFFSET knob until I is displayed. Press and hold AVM-2000 INPUT OFFSET 

knob for approximately 5 seconds. 
 

 

8.

 

Press AVM-2000 INPUT OFFSET knob until a padlock symbol is displayed in the lower right of the 

LCD. 
 

9.

 

If required, press AVM-2000 OPERATE/ZERO button to select IMPEDANCE: ZERO as indicated on 

AVM-2000 LCD. 
 

 

10.

 

Press and hold AVM-2000 RANGE knob for approximately 5 seconds until AVM-2000 LCD indicates 

METER OFFSET. 
 

11.

 

Using AVM-2000 OUTPUT LEVEL knob, adjust AVM-2000 meter for a zero indication. 
 

12.

 

Turn AVM-2000 RANGE knob one step clockwise and AVM-2000 LCD readout will indicate METER 

GAIN +. 
 

Содержание AVM-2000

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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