Filter
Top Products
NI 4070/4072 Calibration Procedure 12 ni.com
34. 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
35. Call
niDMM_Read. Subtract the previously stored 100 mV >10 GΩ
mode offset from this measurement, and verify that the result falls
between the limits listed in Table 15.
36. 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
37. Call
niDMM_Read. Subtract the previously stored 100 mV 10 MΩ
mode offset from this measurement and verify that the result falls
between the limits listed in Table 15.
38. Output –100 mV on the calibrator with the range locked to 2.2 V.
This range prevents a 50 Ω calibrator output resistance from creating
a voltage divider with the internal resistance of the NI 4070/4072.
39. 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
40. Call
niDMM_Read. Subtract the previously stored 100 mV >10 GΩ
mode offset from this measurement, and verify that the result falls
between the limits listed in Table 15.
41. 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
42. Call
niDMM_Read. Subtract the previously stored 100 mV 10 MΩ
mode offset from this measurement and verify that the result falls
between the limits listed in Table 15.
43. Output 1 V on the calibrator.
44. Call
niDMM_ConfigureMeasurement with the following
parameters:
• Function =
NIDMM_VAL_DC_VOLTS
• Range = 1
• Resolution = 1e–6