National Instruments NI 4070/4072 6 1/2-Digit FlexDMM 用户手册

© National Instruments Corporation

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 

•

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.

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.