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370344A-01
Copyright
©
2001 National Instruments Corp. All rights reserved.
May 2001
CALIBRATION PROCEDURE
CB-27T T
ERMINAL
B
LOCK
Introduction
This document contains information and step-by-step instructions for
verifying the performance of the temperature sensor on the
National Instruments CB-27T terminal block. This temperature sensor
is for cold-junction compensation of thermocouples on the terminal block.
What Is Calibration?
Calibration
consists of verifying the measurement accuracy of a device
and adjusting for any measurement error.
Verification
is measuring
performance of a device and comparing the results to the factory
specifications. Because the CB-27T terminal block is not user-adjustable,
calibrating this device consists of verifying the performance only, without
correcting for any error.
Why Should You Verify?
The accuracy of electronic components drifts with time and temperature,
which can affect measurement accuracy as the device ages. Verification
ensures that your CB-27T terminal block still meets NI standards. If the
results of the procedure indicate that the temperature sensor on
your terminal block is out of specification, return the terminal block to
National Instruments for repair or replacement.
How Often Should You Verify?
The measurement accuracy requirements of your application determine
how often you should verify the performance of your CB-27T terminal
block. National Instruments recommends you verify your terminal block
at least once every year. You can shorten this interval to six months or
90 days based on the demands of your application.
