DMM800 Series Adjustment Procedures
38
Handheld Instruments Basic Service
Adjustments Part 1
The procedures within this section use the adjustments accessible with the back
case removed from the multimeter.
VR 3
VR 2
VR 1
VR 6
VR 5
VR 4 (DM M 850
and DMM870)
Figure 3: Adjustment locations 1
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 C V
and COM input
connectors of the multimeter.
3. Set the calibrator to output 3.0000 VDC.
4. Adjust VR5 until the display shows 2.9999 to 3.0001 VDC.
5. Turn the calibrator output off.
6. Disconnect the calibrator from the multimeter.
Perform the following steps to adjust the AC voltage calibration at 60 Hz.
1. Set the multimeter dial to V
.
2. Connect the outputs of the calibrator to the C V
and COM input
connectors of the multimeter.
3. Set the calibrator to output 2.0000 VAC at 60 Hz.
4. Adjust VR6 until the display shows 1.9999 to 2.0001 VAC.
DC Volts
AC Volts
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