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NI PXIe-4464 Calibration Procedure
Verification
The following performance verification procedures describe the sequence of operation and
provide test points required to verify the NI PXIe-4464. The verification procedures assume that
adequate traceable uncertainties are available for the calibration references.
Note
Conduct a self-calibration before completing the first verification (that is,
verification that does not immediately follow adjustment). Refer to the
section for instructions on performing a self-calibration.
Note
Test limits in Tables 2 through 15 are based upon the July 2014 edition of the
NI PXIe-4464 Specifications
. Refer to the most recent
NI PXIe-4464 Specifications
at
Analog Input Performance Verification
This section verifies the analog input (AI) performance of the NI PXIe-4464. Some, but not all,
performance characteristics are affected by adjustment and are subject to reverification after adjustment.
Characteristics affected by adjustment have As Left test limits in addition to As Found test limits.
Characteristics unaffected by adjustment solely have test limits with no additional qualification.
AI Offset Accuracy Verification
Complete the following steps to verify the AI offset accuracy:
1.
Using the equipment described in Table 1, connect a BNC shorting cap to each device input
channel.
2.
Create and configure an AI voltage task on the device as shown in Table 2.
Table 2.
AI Offset Verification Configuration
Configuration
Value
Physical channels
Dev_name
/ai0:3
-20 (dB)
Coupling
DC
Terminal configuration
Pseudodifferential
Excitation (IEPE)
0 (A)
Acquisition mode
Finite number of samples
Rate
204800.0
Samples per channel
102400
*
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 minimum voltages you supply when you
create the task.
