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NI 4070/4072 Calibration Procedure 8 ni.com
Verifying DC Voltage
To verify DC voltage of the NI 4070/4072, complete the following steps:
1. Plug in the insulated banana plug shorting bar across the HI and LO
banana plug connectors on the NI 4070/4072.
2. Wait one minute for the thermal EMF to stabilize.
3. Call
niDMM_reset.
4. Call
niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_DC_VOLTS
• Range = 1
• Resolution = 1e–6
5. Set the input resistance of the NI 4070/4072 to >10 GΩ by calling
niDMM_SetAttributeViReal64 with the following parameters:
• Attribute_ID =
NIDMM_ATTR_INPUT_RESISTANCE
• Attribute_Value = NIDMM_VAL_GREATER_THAN_10_GIGAOHM
6. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 15.
7. Set the input resistance of the NI 4070/4072 to 10 MΩ by calling
niDMM_SetAttributeViReal64 with the following parameters:
• Attribute_ID =
NIDMM_ATTR_INPUT_RESISTANCE
• Attribute_Value = NIDMM_VAL_10_MEGAOHM
8. Call
niDMM_Read. Verify that this measurement falls between the
limits listed in Table 15.
9. Call
niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_DC_VOLTS
• Range = 10
• Resolution = 10e–6
10. Set the input resistance of the NI 4070/4072 to >10 GΩ by calling
niDMM_SetAttributeViReal64 with the following parameters:
• Attribute_ID =
NIDMM_ATTR_INPUT_RESISTANCE
• Attribute_Value = NIDMM_VAL_GREATER_THAN_10_GIGAOHM
11. Call niDMM_Read. Verify that this measurement falls between the
limits listed in Table 15.