Process Calibrators
Calibration
63
OHMS INPUT
1. In OHMS INPUT mode, the unit will display “C 15” for 1 second and then display
the OHMS input using the default calibration.
2. Connect the test leads from the 5520 main Jacks to the 712 jacks in 4 wire
configuration (2 wires at 5520, 4 wires at 712). The unit should read 15.0 Ω ±5%.
3. Push
to go to the next calibration point. “C 400” will be displayed for 1 second
and then it will display the ohms input.
4. Source 400 Ω from the 5520. The unit should read 400.0 Ω ±5%.
5. Push
to go to the next calibration point. “C3200” will be displayed for 1 second
and then it will display the ohms input.
6. Source 3200 Ω from the 5520. The unit should read 3200.0Ω ±5%.
7. Push
to complete OHMS INPUT calibration. “CHEC” will be displayed for 1
second. The new calibration constants are applied and the OHMS INPUT calibration
can be checked.
8. Push
to go to the next mode.
OHMS OUTPUT Low Range
1. In OHMS OUTPUT low range mode, the unit will display “ 15.00” and will source
OHMS using the default calibration.
2. Connect the 712 to the DMM in OHMS read using 4 wire mode connection (2 wires
at 712, 4 wires at DMM). The DMM should read 15.00 Ω ±5%.
3. Adjust the value for OHMS OUTPUT using the arrows on the 712 keypad to source
exactly 15.00 Ω.
4. Push
to go to the next calibration point. “400.00” will be displayed
5. Adjust using the arrows on the keypad to source exactly 400.00 Ω.
6. Push
to complete OHMS OUTPUT low range calibration. “CHEC” will be
displayed for 1 second. The new calibration constants are applied and the calibration
can be checked.
7. Push
to go to the next mode.
OHMS OUTPUT High Range
1. In OHMS OUTPUT high range mode, the unit will display “ 20.0” and will source
OHMS using the default calibration. Keep the connections from the previous mode.
The DMM should read 20.0 Ω ±5%.
2. Adjust the value for OHMS OUTPUT using the arrows on the 712 keypad to source
exactly 20.0 Ω.
3. Push
to go to the next calibration point. “4000.0” will be displayed.
4. Adjust using the arrows on the keypad to source exactly 4000.0 Ω.
5. Push
to complete OHMS OUTPUT high range calibration. “CHEC” will be
displayed for 1 second. The new calibration constants are applied and the calibration
can be checked.
6. Push
to complete calibration.
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