©
National Instruments Corporation
43
NI PXI-4070 Calibration Procedure
26. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCCAL_ZINT
.
27. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCCAL_2WIRELEAKAGE
.
Caution
Make sure that the insulation of these cables does not touch.
28. On the NI 4070, plug a Pomona B-4 banana cable from the HI input to
the HI_SENSE input, and another banana cable from the LO input to
the LO_SENSE input.
29. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCCAL_4WIRELEAKAGE.
30. Remove the banana cables and plug the connector block of the
calibration cable assembly back into the NI 4070.
31. Wait two minutes for the thermal EMF to stabilize.
32. Output 100 M
Ω
from the calibrator without external sense.
33. 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
34. Output 0
Ω
from the calibrator without external sense or 2-wire
compensation.
35. 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
36. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_2_WIRE_RES
•
Range
=
100e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
37. Output 100 k
Ω
on the calibrator with external sense turned on, but
without 2-wire compensation.
38. Call
niDMM_CalAdjustGain
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
100e3
