User's Manual

© National Instruments Corporation 43 NI 4070/4072 Calibration Procedure
10. Call niDMM_CalAdjustGain with the following parameters:
• Mode =
NIDMM_VAL_DC_VOLTS
• Range = 10
• Input Resistance = NIDMM_VAL_GREATER_THAN_10_GIGAOHM
• Expected Measurement = 10
11. Output –10 V on the calibrator.
12. Call
niDMM_CalAdjustGain with the following parameters:
• Mode =
NIDMM_VAL_DC_VOLTS
• Range = 10
• Input Resistance = NIDMM_VAL_GREATER_THAN_10_GIGAOHM
• Expected Measurement = –10
13. Disconnect the Fluke 5440 cable from the NI 4070/4072 banana plug
connectors, leaving the other end of the cable connected to the
calibrator binding posts.
14. Plug in the insulated banana plug shorting bar across the HI and LO
banana plug connectors of the NI 4070/4072.
15. Wait two minutes for the thermal EMF to stabilize.
16. Call
niDMM_CalAdjustOffset with the following parameters:
• Mode =
NIDMM_VAL_DC_VOLTS
• Range = 10
• Input Resistance = NIDMM_VAL_GREATER_THAN_10_GIGAOHM
17. Call niDMM_CalAdjustMisc with Type set to
NIDMM_EXTCAL_MISCCAL_VREF.
18. Call
niDMM_CalAdjustOffset with the following parameters:
• Mode =
NIDMM_VAL_DC_VOLTS
• Range = 0.1
• Input Resistance = NIDMM_VAL_10_MEGAOHM
19. Remove the shorting bar, and plug the Fluke 5440 cable back into the
NI 4070/4072 banana plug connectors, as shown in Figure 1.
20. Wait one minute for the thermal EMF to stabilize.
21. Output 10 MΩ from the calibrator without external sense.
22. Call
niDMM_CalAdjustGain with the following parameters:
• Mode = NIDMM_VAL_2_WIRE_RES
• Range = 10e6
• Input Resistance = NIDMM_VAL_RESISTANCE_NA
• Expected Value = the display on the calibrator for 10 MΩ