National Instruments SCXI -1125 ユーザーズマニュアル
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370271A-01
© Copyright 2000 National Instruments Corp. All rights reserved.
December 2000
CALIBRATION PROCEDURE
SCXI -1125
Introduction
This document contains information and step-by-step instructions for
verifying and calibrating the National Instruments SCXI-1125 signal
conditioning module.
verifying and calibrating the National Instruments SCXI-1125 signal
conditioning module.
What Is Calibration?
Calibration
is a procedure of reading offset and gain errors from a device
and updating special analog calibration circuitry that corrects these errors.
National Instruments calibrates every SCXI-1125 module at the factory.
During the factory calibration process, the calibration constants are stored
in the non-volatile memory of the device. These values are loaded from
memory and used as needed by the device.
National Instruments calibrates every SCXI-1125 module at the factory.
During the factory calibration process, the calibration constants are stored
in the non-volatile memory of the device. These values are loaded from
memory and used as needed by the device.
Why Should You Calibrate?
Offset and gain errors drift with time and temperature changes, which could
invalidate the factory-set calibration of a device and increase measurement
uncertainty. Calibration restores the device to its specified accuracy.
invalidate the factory-set calibration of a device and increase measurement
uncertainty. Calibration restores the device to its specified accuracy.
How Often Should You Calibrate?
The measurement accuracy requirements of your application
determine how often you should calibrate your SCXI-1125 module.
National Instruments recommends you perform a complete calibration
at least once every year. You can shorten this interval to six months or
90 days, based on the demands of your application.
determine how often you should calibrate your SCXI-1125 module.
National Instruments recommends you perform a complete calibration
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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