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789/787B
Calibration Manual
32
Amps AC Adjustment
1. Connect the ProcessMeter to the A output of the 5522A calibrator.
2.
Turn the UUT’s switch to
W.
3. Press
J (BLUE) to enter the A ac function.
4. Press and hold the Calibration Button for 2 seconds (see Figure 11). The unit will
beep.
5.
Apply 0.05 A ac @ 60 Hz. Press after the reading stabilizes.
6.
Apply 1 A ac. Press after the reading stabilizes.
7. Press
to store calibration constants.
Caution
Remove 1 A from UUT promptly after storing calibration constant.
Fuse will blow after 30 seconds.
Milliamps Output Adjustment
1. Connect the ProcessMeter A output to the Digital Multimeter input.
2.
UUT will output approximately 4 mA. Use the fine and coarse adjustments on the
UUT to get a 4.000 mA reading on the Digital Multimeter.
3. Press
after 4.000 mA reading is reached on the Digital Multimeter.
4.
UUT will output approximately 20 mA. Use the fine and coarse adjustments on the
UUT to get a 20.000 on the Digital Multimeter.
5. Press
after 20.000 mA reading is reached on the Digital Multimeter.
6. Press
to store calibration constants.
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