Calibration Procedure - Milwaukee 2217-20 Repair Service Instructions

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
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
To avoid shock, disconnect test leads from any voltage source than remove from meter before
opening the case or replacing the battery.
(A) Open the battery door
1. Disconnect the test leads from any circuit
under test and turn off the meter.
2. Loosen the screws from the battery door.
3. Remove the battery door.
4. Supply 3V DC 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 4.000V ± 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 an
WARNING
d disconnect the meter from the calibrator.
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