PXIe-4468 Calibration Procedure
© National Instruments Corporation
11
2.
Configure the calibrator to output 0V DC, with GND engaged.
Repeat 6 times, once for each gain setting.
3.
Create and configure an AI voltage task on the DUT as shown in
Table 2
.
Table 2:
AI Offset Verification Configuration
Configuration
Value
Physical channels
Dev_name
/ai
x
Gain*
Gain from
Coupling
DC
Terminal configuration
Pseudodifferential
Excitation (IEPE)
0 (A)
Acquisition mode
Finite number of samples
Rate
250000
Samples per channel
125000
*
As you configure the AI voltage task, refer to
Table 3
for the maximum and minimum
voltages to specify when creating the task to ensure the specified gain range is used on
the module. The module automatically selects the gain range based on the maximum and mini
voltages you supply when you create the task.
Table 3:
Gain Range and Corresponding Max and Min Voltages
Desired Gain Range (dB)
Max Voltage (V)
Min Voltage (V)
-20
42.4
-42.4
-10
31.6
-31.6
0
10.0
-10.0
10
3.16
-3.16
20
1.00
-1.00
