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370253B-01
© Copyright 2000 National Instruments Corp. All rights reserved.
November 2000
CALIBRATION PROCEDURE
SCXI -1303 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 SCXI-1303 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
correcting for any measurement error. For SCXI-1303 terminal blocks,
calibration is simply verifying the measurement accuracy of the
components on the terminal block. Because these components are not
user-adjustable, calibration consists of verification only, without correcting
for any error. Verification is measuring the performance of a device and
comparing the results to the factory specifications of the device.
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 SCXI-1303 terminal block still meets
National Instruments standards. If the results of the procedure indicate that
the temperature sensor on your terminal block is out of specification, return
the sensor 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 SCXI-1303 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.
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