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© National Instruments
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9
c.
Write the current value to task.
d.
Use the DMM to read the current measurement value.
e.
Clear the task.
f.
Compare each measured value to the Upper Limit and Lower Limit values in Table 8.
4.
Repeat step 3 for all current values listed in Table 8.
5.
Disconnect the DMM from the terminal block.
6.
Repeat steps 3 through 5 for every channel you want to verify.
Adjustment
The following performance adjustment procedures describe the sequence of operation required
to adjust the NI PXIe-4322.
Voltage Output Mode Adjustment Procedure
Complete the following procedure to adjust the voltage mode accuracy of the NI PXIe-4322:
1.
Connect the DMM to the TB-4322 as shown in Figure 2 for the channel you want to adjust.
2.
Use the information in Table 9 to configure the DMM.
Table 8.
Current Mode
Test Points (mA)
Lower Limit (mA)
Upper Limit (mA)
-19
-19.0101
-18.9899
0
-0.0038
0.0038
19
18.9899
19.0101
Table 9.
DMM Voltage Setup
Configuration
Value
Measurement
Voltage
Range
Minimum range to measure 16 V
(for the first to tenth test points)
1 V (for the eleventh test point)
Digits Resolution
7.5
Aperture Time
100 ms
Autozero
On
ADC Calibration
On
