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NI 4070/4072 Calibration Procedure 44 ni.com
23. Output 0 Ω from the calibrator without external sense or 2-wire
compensation.
24. Call
niDMM_CalAdjustGain with the following parameters:
• Mode =
NIDMM_VAL_2_WIRE_RES
• Range = 10e6
• Input Resistance = NIDMM_VAL_RESISTANCE_NA
• Expected Value = the display on the calibrator for 0 Ω
25. Call
niDMM_CalAdjustOffset with the following parameters:
• Mode =
NIDMM_VAL_2_WIRE_RES
• Range = 10e6
• Input Resistance = NIDMM_VAL_RESISTANCE_NA
26. Disconnect the Fluke 5440 cable from the NI 4070/4072.
27. Call
niDMM_CalAdjustMisc with Type set to
NIDMM_EXTCAL_MISCCAL_ZINT.
28. Call
niDMM_CalAdjustMisc with Type set to
NIDMM_EXTCAL_MISCCAL_2WIRELEAKAGE.
29. On the NI 4070/4072, plug a Pomona B-4 banana cable from the HI
input to the HI SENSE input. Plug another Pomona B-4 banana cable
from the LO input to the LO SENSE input.
Caution Make sure that the insulation of these cables does not touch.
30. Call
niDMM_CalAdjustMisc with Type set to
NIDMM_EXTCAL_MISCCAL_4WIRELEAKAGE.
31. Remove the banana cables, and plug the two sets of Fluke 5440 cables
into the appropriate banana plug connectors on the NI 4070/4072,
as shown in Figure 2 for 4-wire resistance.
32. Wait two minutes for the thermal EMF to stabilize.
33. Output 100 MΩ from the calibrator without external sense.
34. Call
niDMM_CalAdjustGain with the following parameters:
• Mode =
NIDMM_VAL_2_WIRE_RES
• Range = 100e6
• Input Resistance = NIDMM_VAL_RESISTANCE_NA
• Expected Value = the display on the calibrator for 100 MΩ
35. Output 0 Ω from the calibrator without external sense or 2-wire
compensation.