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NI PXIe-4340 Calibration Procedure
•
Allow a warm-up time of at least 15 minutes to ensure that the PXIe-4340 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
.
Initial Setup
Refer to the
NI PXIe-4340 and TB-4340 Installation Guide and Terminal Block Specifications
for information about how to install the software and hardware and how to configure the device
in NI 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. 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-4340. The verification procedures assume
that adequate traceable uncertainties are available for the calibration references.
The PXIe-4340 has four independent analog input channels. You can verify the accuracy of any
or all of the channels depending upon your desired test coverage.
Excitation Accuracy
To connect the TB-4340 for excitation verification, install the PXIe-4340 and the TB-4340 in
the PXI Express chassis according to the instructions in the
NI PXIe-4340 and TB-4340 User
Guide and Terminal Block Specifications
. Do not use the excitation verification terminals as
they are only used for gross field checks and will introduce additional errors.
Complete the following steps to verify the excitation accuracy of the PXIe-4340:
1.
Connect the PXI-4070 across the EX+ and EX- terminals of the channel to be verified.
2.
Refer to Table 3 to configure the PXI-4070 and acquire a voltage measurement for DC
Offset.
