Process Calibrators
Calibration
55
OUTPUT ----- Ω
then the unit will reset.
24. Press the power key to turn the unit off and disconnect the test leads.
712 Calibration (V2.0 and Later)
1. Hold down R and C while turning the power on.
2. The display shows CAL for 1 second and then xxx, where xxx is the number the
times the unit has been through a calibration adjustment. When the two keys are
released, PASS is displayed. One second later a zero is displayed for the most
significant of the three digit password. Use the two small arrows to change the
number. After setting each digit, press
C. If the password entry was correct, the
712 will go into calibration. If the password was wrong, the 712 will go into normal
operation mode. The password is 217.
3. The calibration will be performed in the following order:
OHMS INPUT
OHMS OUTPUT low range
OHMS OUTPUT high range
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 Ohms +/-
5%.
3. Press
C 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 Ohms from the 5520. The unit should read 400.0 Ohms +/- 5%.
5. Press
C 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 Ohms from the 5520. The unit should read 3200.0Ohms +/- 5%.
7. Press
C 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. Press
C 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 Ohms +/- 5%.
3. Adjust the value for OHMS OUTPUT using the arrows on the 712 keypad to source
exactly 15.00 Ohms.
4. Press
C 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 Ohms.
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