RM-4339 Calibration Procedure
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© National Instruments
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7
7.
for each channel you want to verify.
8.
Disconnect the DMM from the module.
Offset Voltage Verification
The offset voltage verification uses the NI PXIe-4339 to measure the offset voltage of the
RM-4339. Prior to measuring the offset voltage of the RM-4339, an offset characterization is
performed on the NI PXIe-4339 using a TB-4339/B/C to provide an electrical short on the input
of the NI PXIe-4339. The temperature variation of the environment should be kept within 1 °C
between measurement of the offset error of the NI PXIe-4339 and the offset measurement of the
RM-4339.
Complete the following steps to verify the offset voltage:
1.
Make the following connections:
a.
On the TB-4339/B/C, short the AI+ and AI- of all the channels to AIGND.
Note
Refer to the
NI PXIe-4339 and TB-4339/B/C Installation Guide and Terminal
Block Specifications
for the pin assignments and signal names.
b.
Connect the female end of the SH96-96-2 cable to the NI PXIe-4339.
c.
Connect the TB-4339/B/C to the male end of the SH96-96-2 cable.
Table 3.
SCA Shunt Calibration Resistance Accuracy Limits
Nominal Value (
Ω
)
Lower Limit (
Ω
)
Upper Limit (
Ω
)
100,000
99,900
100,100
