Fluke 771 - Page 18

771
Calibration Manual
10
Perform the tests as follows:
1. Connect a single loop of 14 gauge insulated copper wire to the calibrator AUX output
terminals.
2. Clamp the Meter jaw around the wire with the jaw arrow pointing toward the
calibrator HI terminal.
3. Output 0 mA dc from the calibrator.
4. Press A on the Meter.
5. Set the calibrator output for the value in Step 1 of Table 3.
6. Compare the Meter displayed reading with the display reading limits in Table 3.
7. Complete steps 2-4 for each calibrator output setting in Table 3.
8. If the Meter fails to meet any of the Display Reading Limits, it requires calibration
adjustment, or repair. See Calibration Adjustment or Contacting Fluke.
Table 3. Accuracy Tests
Unit Under Test
Display Reading Limits
Step
Unit Under Test
Function
Calibrator
Output Setting
Lower Limit Upper Limit
1. 100 mA dc 98.5 101.5
2. -100 mA dc -100.7 -99.3
3. 20 mA dc 19.91 20.09
4. -20 mA dc -20.09 -19.91
5. 12 mA dc 11.93 12.07
6. -12 mA dc -12.07 -11.93
7. 4 mA dc 3.94 4.06
8.
mA dc
-4 mA dc -4.06 -3.94
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