NI PXI-4070 Calibration Procedure
28
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6.
Refer to Table 7 for the appropriate calibrator output and function
parameter values as you complete the following steps:
a.
On the calibrator, output the value listed in the Calibrator Output
column in Table 7 for the current iteration. Make sure that the
external sense is turned on, but 2-wire compensation is turned off.
Note
After setting the calibrator output to 0
Ω
in the seventh iteration, you do not need to
continually set the calibrator to 0
Ω
for iterations 8 through 12.
b.
Call
niDMM_ConfigureMeasurement
with the parameters set
as shown in Table 7 for the current iteration.
c.
Call
niDMM_Read
. Verify that this measurement falls between the
tolerances listed in Table 13. Tolerances are provided instead of
absolute limits because your calibrator will have different discrete
resistance values.
7.
Repeat step 6 for each of the remaining iterations listed in Table 7.
8.
Call
niDMM_ConfigureOffsetCompOhms
with
OffsetCompOhms
set to
NIDMM_VAL_OFFSET_COMP_OHMS_OFF
.
Table 7.
niDMM_ConfigureMeasurement Parameters
Iteration
Calibrator
Output
niDMM_ConfigureMeasurement Parameters
Function
Range
Resolution
1
10 M
Ω
NIDMM_VAL_4_WIRE_RES
10e6
10
2
1 M
Ω
NIDMM_VAL_4_WIRE_RES
1e6
1
3
100 k
Ω
NIDMM_VAL_4_WIRE_RES
100e3
0.1
4
10 k
Ω
NIDMM_VAL_4_WIRE_RES
10e3
0.01
5
1 k
Ω
NIDMM_VAL_4_WIRE_RES
1e3
1e–3
6
100
Ω
NIDMM_VAL_4_WIRE_RES
100
100e–6
7
0
Ω
NIDMM_VAL_4_WIRE_RES
10e6
10
8
0
Ω
NIDMM_VAL_4_WIRE_RES
1e6
1
9
0
Ω
NIDMM_VAL_4_WIRE_RES
100e3
0.1
10
0
Ω
NIDMM_VAL_4_WIRE_RES
10e3
0.01
11
0
Ω
NIDMM_VAL_4_WIRE_RES
1e3
1e–3
12
0
Ω
NIDMM_VAL_4_WIRE_RES
100
100e–6
