©
National Instruments Corporation
43
NI 4070/4072 Calibration Procedure
28. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_2_WIRE_RES
•
Range
=
10e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
29. Disconnect the Fluke 5440 cable from the NI 4070/4072.
30. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCCAL_ZINT
.
31. 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 M
Ω
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 M
Ω
35. Output 0
Ω
from the calibrator without external sense or 2-wire
compensation.
36. 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 0
Ω
37. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_2_WIRE_RES
•
Range
=
100e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
38. Output 0
Ω
on the calibrator with external sense turned on and 2-wire
compensation turned off.
39. Call
niDMM_CalAdjustGain
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
10e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
•
Expected Value
=
the display on the calibrator for 0
Ω