User's Manual

© National Instruments Corporation 15 NI 4070/4072 Calibration Procedure
71. Call niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_DC_VOLTS
• Range = 300
• Resolution = 300e–6
72. Call niDMM_Read. Before you apply the voltage, the DMM must be in
the 300 V range.
73. Output 300 V on the calibrator.
74. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 15.
75. Output –300 V on the calibrator.
76. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 15.
77. Reset the calibrator for safety reasons.
You have completed verifying the DC voltage of the NI 4070/4072. Select
one of the following options:
• If you want to continue verifying other modes, go to the Verifying AC
Voltage 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 Voltage
To verify AC voltage 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
appropriate banana plug connectors on 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.
3. Output 5 mV at 1 kHz on the calibrator.
4. Call
niDMM_reset to reset the NI 4070/4072 to a known state.