National Instruments NI 4070/4072 6 1/2-Digit FlexDMM 用户手册
NI 4070/4072 Calibration Procedure
8
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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.
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 G
Ω 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 M
Ω 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 G
Ω 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.