NI PXI-4070 Calibration Procedure
34
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•
If you do not want to verify any additional modes and you are
performing a pre-adjustment verification, call
niDMM_close
to close
the session.
Verifying DC Current
To verify the DC current of the NI 4070, complete the following steps:
1.
Reset the calibrator.
Caution
Step 2 must be performed correctly to avoid shorting on unconnected spade lugs.
2.
Connect the calibration cable assembly with the connector block
plugged into the NI 4070 and with the spade lugs connected to the
appropriate binding posts on the calibrator, as described in Figure 3
and Table 1.
3.
Connect a banana-to-banana cable or a wire (AWG
≤
22) between the
AUX CURRENT binding post and the SENSE HI binding post of the
calibrator.
4.
Output 0 A on the calibrator with the current output set to
AUX
.
5.
Call
niDMM_reset
to reset the NI 4070 to a known state.
6.
Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function
=
NIDMM_VAL_DC_CURRENT
•
Range
=
0.02
•
Resolution
=
20e–9
7.
Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 15.
8.
Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function
=
NIDMM_VAL_DC_CURRENT
•
Range
=
0.2
•
Resolution
=
200e–9
9.
Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 15.
10. Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function
=
NIDMM_VAL_DC_CURRENT
•
Range
=
1
•
Resolution
=
1e–6
