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Calibration Procedure
Recalibrate the meter:
It is recommended that the meter may be calibrated once year. Use the following procedure to
calibrate the meter.
Environmental Condition
1.
Perform calibration at an ambient temperature and relative humidity (23°C±2°C and R.H. 80%).
Allow the instrument to sit at this temperature for at least thirty minutes.
Calibration Procedure
(A) Open the bottom case
1.
Disconnect the test leads from any circuit under test and turn off the meter.
2.
Loosen the screw from the bottom case.
3.
Remove the bottom case.
4.
Supply 3V to the meter.
(B) DCV Calibration (VR2)
1.
Rotate the rotary switch to DCV Function.
2.
Connect the output of a DCV calibrator to V and COM input terminals of the meter.
3.
Output DCV 4.000V from the calibrator.
4.
Adjust VR2 until the display shows 4.000V ± 0.001V.
5.
Turn off the output of the calibrator and disconnect the meter from the calibrator.
(C) ACV Calibration (VR3)
1.
Rotate the rotary switch to ACV Function.
2.
Connect the output of an ACV calibrator to V and COM input terminals of the meter.
3.
Output ACV 4.000V @ 60Hz from the calibrator.
4.
Adjust VR3 until the display shows 4.015V ± 0.001V.
5.
Turn off the output of the calibrator and disconnect the meter from the calibrator.
(D) DCV mV Calibration (VR4)
1.
Rotate the rotary switch to DCV Function.
2.
Connect the output of a DCV calibrator to V and COM input terminals of the meter.
3.
Output DCV 400.0mV from the calibrator.
4.
Adjust VR4 until the display shows 400.0mV ± 0.1mV.
5.
Turn off the output of the calibrator and disconnect the meter from the calibrator.
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