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NI 4070/4072 Calibration Procedure
42
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16. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_DC_VOLTS
•
Range
=
10
•
Input Resistance
=
NIDMM_VAL_GREATER_THAN_10_GIGAOHM
17. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCCAL_VREF
.
18. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_DC_VOLTS
•
Range
=
0.1
•
Input Resistance
=
NIDMM_VAL_10_MEGAOHM
19. Remove the shorting bar, and plug the Fluke 5440 cable back into the
NI 4070/4072 banana plug connectors, as shown in Figure 1.
20. Wait one minute for the thermal EMF to stabilize.
21. Output 0 M
Ω
from the calibrator without external sense or 2-wire
compensation.
22. 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
23. Output 10 M
Ω
from the calibrator without external sense.
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 10 M
Ω
25. Output 1.9 M
Ω
from the calibrator without external sense or 2-wire
compensation.
26. 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 1.9 M
Ω
27. Output 0
Ω
from the calibrator without external sense or 2-wire
compensation.