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National Instruments Corporation
45
NI 4070/4072 Calibration Procedure
50. Output 0
Ω
on the calibrator with external sense turned on and 2-wire
compensation turned off.
51. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
100e3
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
52. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
10e3
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
53. Call
niDMM_CalAdjustMisc
with
Type
set to
NIDMM_EXTCAL_MISCAL_RREF
.
54. Call
niDMM_SelfCal
to self-calibrate the NI 4070/4072.
55. Output 0
Ω
on the calibrator with external sense turned on and 2-wire
compensation turned off.
56. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
10e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
57. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
1e6
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
58. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
1e3
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
59. Call
niDMM_CalAdjustOffset
with the following parameters:
•
Mode
=
NIDMM_VAL_4_WIRE_RES
•
Range
=
100
•
Input Resistance
=
NIDMM_VAL_RESISTANCE_NA
60. Remove the Fluke 5440 cables from the NI 4070/4072, leaving the
other end of the cables connected to the calibrator.
61. Plug in the insulated shorting bar across the
HI
and
LO
banana plug
connectors of the NI 4070/4072.
62. Wait two minutes for the thermal EMF to stabilize.