Phase Adjustment Procedure - Fluke 771 Calibration Manual

Phase Adjustment Procedure

1. Clamp the Meter's current clamp around an insulated 18-gauge, copper wire,
with 6-inch diameter. Current flow should be in the direction of the arrow on
the current clamp.
2. Press  >1 second until the percentage display indicates the Meter's
currently saved 3-digit phase value.
3. Output 0 µA dc from the calibrator.
4. Press  on the Meter to zero the reading.
5. Rotate the Meter's clamp around the current loop conductor and record the
minimum and maximum values of the Meter's display reading. See Figure 5.
6. Use  and , to adjust the difference between the minimum and
maximum value recorded in Step 5, until the reading difference is less than
0.05 mA.
7. Press the hidden calibration button to exit calibration mode. See Figure 4.
Rotate Meter clamp around
current loop conductor
Figure 5. Phase Adjustment
Milliamp Process Clamp Meter
Calibration Adjustment
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