Fluke 1535 Calibration Manual page 21

8. To calibrate the Ohm function (1537 only), use the PC and serial communication software to enter these
commands:
Command Operation / Purpose
Connect the calibrator between E and G (use Ohm
function)
cal start_dmm_ohm Enter OHM calibration mode
drs 1 Enter 600
Calibrator outputs 0
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 0 Write the calibration parameter 0, use read value
0 ADC_READ ADC_READ in the previous step
Calibrator outputs 600
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 1 Write the calibration parameter 1, use read value
600 ADC_READ ADC_READ in the previous step
drs 2 Enter 6 k
Calibrator outputs 660
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 2 Write the calibration parameter 2, use read value
660 ADC_READ ADC_READ in the previous step
Calibrator outputs 6 k
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 3 Write the calibration parameter 3, use read value
6000 ADC_READ ADC_READ in the previous step
drs 3 Enter 60 k
Calibrator outputs 6.6 k
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 4 Write the calibration parameter 4, use read value
6600 ADC_READ ADC_READ in the previous step
Calibrator outputs 60 k
adc vr_vc r Read the OHM analog-to-digital conversion value
cal_param dmm_ohm 5 Write the calibration parameter 5, use read value
60000 ADC_READ ADC_READ in the previous step
cal stop_dmm_ohm Stop the OHM calibration
cal_param save Save the calibration parameters
9. To finish the calibration, shut down the unit under test (UUT) and remove all connections.
Table 3 is a list of the calibration points and the reference reading values used in the calibration procedure.
If any value significantly deviates from the reference range, contact the Fluke Service Center.
Ω
range
Ω
Ω
Ω
range
Ω
Ω
Ω
range
Ω
Ω
Insulation Tester
Calibration Procedure
Response
"cal start_dmm_ohm"
"drs"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
"drs"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
"drs"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
ADC_READ "dmm_ohm_adc"
"dmm_ohm param"
"cal stop_dmm_ohm"
"params saved"
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