PXIe-4302/4303 and TB-4302C Calibration Procedure
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© National Instruments Corporation
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5
Test Conditions
The following setup and environmental conditions are required to ensure the PXIe-4302/4303
meets published specifications.
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Keep connections to the PXIe-4302/4303 as short as possible. Long cables and wires act as
antennas, picking up extra noise that can affect measurements.
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Verify that all connections to the TB-4302 are secure.
•
Use shielded copper wire for all cable connections to the TB-4302. Use twisted-pair wire
to eliminate noise and thermal offsets.
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Maintain an ambient temperature of 23 °C ±5 °C. The PXIe-4302/4303 temperature will be
greater than the ambient temperature.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of at least 15 minutes to ensure that the PXIe-4302/4303
measurement circuitry is at a stable operating temperature.
•
Ensure that the PXI/PXI Express chassis fan speed is set to HIGH, that the fan filters are
clean, and that the empty slots contain filler panels. For more information, refer to the
Maintain Forced-Air Cooling Note to Users
document available on
.
Initial Setup
Refer to the
NI PXIe-4302/4303 and TB-4302/4302C Installation Guide and Terminal Block
Specifications
for information about how to install the software and hardware and how to
configure the device in Measurement & Automation Explorer (MAX).
Note
When a device is configured in MAX, it is assigned a device identifier. Each
function call uses this identifier to determine which DAQ device to verify or to verify
and adjust. This document uses
Dev1
to refer to the device name. In the following
procedures, use the device name as it appears in MAX.
Accuracy Verification
The following performance verification procedures describe the sequence of operations and
provides the test points required to verify the PXIe-4302/4303. The verification procedures
assume that adequate traceable uncertainties are available for the calibration references.
The PXIe-4302/4303 has 32 independent analog input channels. The input range of each channel
can be set to 10 V or 100 mV. You can verify the accuracy of either range for all of the channels
depending upon your desired test coverage.
Complete the following steps to verify the voltage mode accuracy of the PXIe-4302/4303.
1.
Set the PXIe-4139 voltage output to zero volts.
2.
Connect the PXIe-4139 and PXI-4071 to the TB-4302 as shown in Figure 2.
3.
Use Table 3 to configure the PXIe-4139 to output a Test Point value for the appropriate
range shown in Table 6, beginning with the values in the first row.
