National Instruments NI 4070/4072 6 1/2-Digit FlexDMM User Manual
© National Instruments Corporation
25
NI 4070/4072 Calibration Procedure
4.
Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function =
NIDMM_VAL_2_WIRE_RES
•
Range =
10e3
•
Resolution =
0.01
5.
Call
niDMM_ConfigureOffsetCompOhms
with OffsetCompOhms
set to
NIDMM_VAL_OFFSET_COMP_OHMS_ON
.
6.
Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 18.
7.
Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function =
NIDMM_VAL_2_WIRE_RES
•
Range =
1e3
•
Resolution =
1e–3
8.
Call
niDMM_ConfigureOffsetCompOhms
with OffsetCompOhms
set to
NIDMM_VAL_OFFSET_COMP_OHMS_ON
.
9.
Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 18.
10. Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function =
NIDMM_VAL_2_WIRE_RES
•
Range =
100
•
Resolution =
100e–6
11. Call
niDMM_ConfigureOffsetCompOhms
with OffsetCompOhms
set to
NIDMM_VAL_OFFSET_COMP_OHMS_ON
.
12. Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 18.
13. Remove the shorting bar from the NI 4070/4072.
14. Reset the calibrator.
15. Fasten the connectors on one end of the Fluke 5440 cable to the
NI 4070/4072, and fasten the connectors on the other end of the cable
to the appropriate calibrator binding posts. Figure 1 shows the correct
connections. Table 1 lists the cable connections.
to the appropriate calibrator binding posts. Figure 1 shows the correct
connections. Table 1 lists the cable connections.
16. Wait two minutes for the thermal EMF to stabilize if the Fluke 5440
cable was not previously used in this configuration.
17. Output 0
Ω on the calibrator with 2-wire compensation turned on
but with external sense turned off.
18. Call
niDMM_reset
to reset the NI 4070/4072 to a known state.