National Instruments PXI-4070 6 1/2 Digit FlexDMM, Calibration Procedure

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NI PXI-4070 Calibration Procedure 36 ni.com
You have completed verifying the DC current of the NI 4070. Select one of
the following options:
• If you want to continue verifying other modes, go to the Verifying AC
Current section.
• If you do not want to verify other modes and you are performing a
post-adjustment verification, go to the
Completing the Adjustment
Procedures section.
• 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 AC Current
To verify the AC 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. Call
niDMM_reset
to reset the NI 4070 to a known state.
5. Call
niDMM_ConfigureMeasurement
with the following
parameters:
• Function =
NIDMM_VAL_AC_CURRENT
• Range =
0.01
• Resolution =
10e–9
6. Call
niDMM_Read
to configure the NI 4070 for a current mode before
applying current.
7. Output 1 mA at 1 kHz on the calibrator with the current output set
to
AUX
.
8. Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 16.
9. Output 10 mA at 1 kHz on the calibrator with the current output set
to
AUX
.
10. Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 16.