Calibration; Environmental Condition - Milwaukee 2206-20 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 Fork tester.

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.
Opening the Meter Case
To avoid unintentional shock circuit, always place the uncovered Meter assembly on a protective
surface. When the case of the Meter is open, circuit connections are exposed.
(A) To open the Meter case, do the following:
1. Disconnect test leads from any voltage source than remove from meter before opening the case.
2. Remove the battery door by using a flat-blade screwdriver
to turn the battery door screws counter-clockwise.
3. The case bottom is secured to the case top by two screws.
Using a Phillips-head screwdriver, remove the two screws
4. Supply 3V DC to the meter.
(B) DCV Calibration (VR105)
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 300.0V from the calibrator.
4. Adjust VR105 until the display shows 300.0V ± 0.1V.
5. Turn off the output of the calibrator and disconnect the meter from the calibrator.
(C) ACV Calibration (VR104)
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 300.0V @ 60Hz from the calibrator.
4. Adjust VR104 until the display shows 300.0V ± 0.1V.
5. Turn off the output of the calibrator and disconnect the meter from the calibrator.
(D) DC A (400.0 A Range) Calibration (VR103)
1. Rotate the rotary switch to the resistance function.
2. Connect the output of a DC A calibrator to V and COM input terminals of the meter.
3. Output DC 300.0 A from the calibrator.
4. Adjust VR103 until the display shows 300.0 A ± 0.1 A.
5. Turn off the output of the calibrator and disconnect the meter from the calibrator.
WARNING
CAUTION
15
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