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Figure 2
Top shows correct method; bottom shows incorrect method.
Calibration
Calibrate the meter once a year to ensure that it performs according to specifications.
Perform calibration at an ambient temperature of 23ºC ± 2ºC and relative humidity of 75% or less.
Calibration for the Model 61-095:
1. Disconnect the test leads from any circuit under test and turn off tester.
2. Loosen the screws from the battery cover, remove battery cover and pull the battery out of battery box
with battery still connected.
3. Loosen the three screws from the bottom case.
4. Lift the bottom case.
(A) DCV Calibration (Adjust VR1; See Figure 3)
5. Set the test to DCV function.
6. Set the output of calibrator for DCV 600V and connect to V and COM test probes.
7. Using a small flat-tipped screwdriver adjust the potentiometer VR1 until the display reads 600.
8. Disconnect the output terminals of DCV calibrator.
(B) ACV Calibration (Adjust VR2; See Figure 3)
9. Set the tester to ACV function.
10. Set the output of ACV calibration for 300V 50Hz and connect to V and COM test probes.
11. Using a small flat-tipped screwdriver adjust the potentiometer VR2 until the display reads 300.
12. Disconnect the output terminals of ACV calibrator.
(C) ACA Calibration (Adjust VR3; See Figure 3)
13. Set the tester to ACA function.
14. Flow the current of ACA 100.0A 50Hz around the suitable wire or conductor.
15. Place conductor anywhere within the sensor zone.
16. Using a small flat-tip screwdriver adjust the potentiometer VR3 until display reads 100.0 to 100.1.
Remove the tester away from the wire or conductor.
Form number TM61095 Rev 2 September 2002