NI PXIe-4340 Calibration Procedure
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© National Instruments
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5
Each channel consists of two terminal connections specific to that channel as shown in Table 2.
You can verify the accuracy for any or all channels depending on the desired test coverage.
Refer to Table 2 for the analog signal names of the TB-4340.
Test Conditions
The following setup and environmental conditions are required to ensure the PXIe-4340 meets
published specifications:
•
Keep connections to the PXIe-4340 as short as possible. Long cables and wires act as
antennas, picking up extra noise that can affect measurements.
•
Verify that all connections to the TB-4340 are secure.
•
Use shielded copper wire for all cable connections to the TB-4340. Use twisted-pair wire
to eliminate noise and thermal offsets.
•
Maintain an ambient temperature of 23 °C ±5 °C. The PXIe-4340 temperature will be
greater than the ambient temperature. Maintain an internal device temperature range of
T
cal
± 5 °C for the PXI-4070.
1
•
Keep relative humidity below 80%.
•
For valid test limits, the device must be within ±5 °C and 24 hours of the last
self-calibration.
Table 2.
TB-4340 Analog Signal Names
Signal Name
Signal Description
Excitation Verifi
Positive excitation terminal for gross checks
Excitation Verification -
Negative excitation terminal for gross checks
EX+
Positive excitation terminal
EX-
Negative excitation terminal
RS+
Positive remote sense terminal
RS-
Negative remote sense terminal
AIGND
Analog input ground
AI+
Positive input voltage terminal
AI-
Negative input voltage terminal
CT
LVDT center tap connection
1
T
cal
is the internal device temperature recorded by the PXI-4070 at the completion of the last
self-calibration.