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© National Instruments Corporation 33 NI 4070/4072 Calibration Procedure
Verifying AC Current
To verify the AC current of the NI 4070/4072, complete the following
steps:
1. Reset the calibrator.
2. Fasten the connectors on one end of the Fluke 5440 cable to the
NI 4070/4072 HI SENSE and LO banana plug connectors, and fasten
the connectors on the other end of the cable to the HI and LO calibrator
binding posts. Figure 3 shows the correct connections. Table 9 lists the
cable connections.
3. Call
niDMM_reset to reset the NI 4070/4072 to a known state.
4. Call
niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_AC_CURRENT
• Range = 0.01
• Resolution = 10e–9
5. Call niDMM_Read to configure the NI 4070/4072 for a current mode
before applying current.
6. Output 1 mA at 1 kHz on the calibrator with the current output set
to
NORM.
7. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 20.
8. Output 10 mA at 1 kHz on the calibrator.
9. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 20.
10. Call
niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_AC_CURRENT
• Range = 0.1
• Resolution = 100e–9
11. Call niDMM_Read. Verify that this measurement falls between the
limits listed in Table 20.
12. Output 100 mA at 1 kHz on the calibrator.
13. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 20.