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DMM249 Adjustment Procedures
Adjustments
DC Volts
AC Volts
20
The procedures within this section use the adjustments accessible with the back
case removed from the multimeter.
VR1
Figure 2: Adjustment locations
Perform the following steps to adjust the DC voltage calibration.
1. Set the multimeter dial to V .
2. Connect the outputs of the calibrator to the V-W-
of the multimeter.
3. Set the calibrator to output 190.0 mVDC.
4. Adjust VR1 until the display shows 190.0 to 190.1 mVDC.
5. Turn the calibrator output off.
6. Disconnect the calibrator from the multimeter.
Perform the following steps to adjust the AC voltage calibration.
1. Set the multimeter dial to V .
2. Connect the outputs of the calibrator to the V-W-
of the multimeter.
3. Set the calibrator to output 300.0 VAC.
4. Adjust VR2 until the display shows 300.0 VAC.
5. Turn the calibrator output off.
6. Disconnect the calibrator from the multimeter.
VR2
and COM input connectors
and COM input connectors
Handheld Instruments Basic Service
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