Fluke 1535 - Page 21

Insulation Tester
Calibration Procedure
17
8. To calibrate the Ohm function (1537 only), use the PC and serial communication software to enter these
commands:
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.
Command Operation / Purpose Response
Connect the calibrator between E and G (use Ohm
function)
cal start_dmm_ohm Enter OHM calibration mode “cal start_dmm_ohm”
drs 1 Enter 600
Ω range “drs”
Calibrator outputs 0
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 0
0 ADC_READ
Write the calibration parameter 0, use read value
ADC_READ in the previous step
“dmm_ohm param”
Calibrator outputs 600
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 1
600 ADC_READ
Write the calibration parameter 1, use read value
ADC_READ in the previous step
“dmm_ohm param”
drs 2 Enter 6 k
Ω range “drs”
Calibrator outputs 660
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 2
660 ADC_READ
Write the calibration parameter 2, use read value
ADC_READ in the previous step
“dmm_ohm param”
Calibrator outputs 6 k
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 3
6000 ADC_READ
Write the calibration parameter 3, use read value
ADC_READ in the previous step
“dmm_ohm param”
drs 3 Enter 60 k
Ω range “drs”
Calibrator outputs 6.6 k
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 4
6600 ADC_READ
Write the calibration parameter 4, use read value
ADC_READ in the previous step
“dmm_ohm param”
Calibrator outputs 60 k
Ω
adc vr_vc r Read the OHM analog-to-digital conversion value ADC_READ “dmm_ohm_adc”
cal_param dmm_ohm 5
60000 ADC_READ
Write the calibration parameter 5, use read value
ADC_READ in the previous step
“dmm_ohm param”
cal stop_dmm_ohm Stop the OHM calibration “cal stop_dmm_ohm”
cal_param save Save the calibration parameters “params saved”