National Instruments SCXI-1303 Operation And Calibration Manual

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National Instruments SCXI-1303 Operation And Calibration Manual Manual pdf 1 page image

National Instruments ™ , ni.com™ , and SCXI ™ are trademarks of National Instruments Corporation. Product and company names mentioned herein aretrademarks or trade names of their respective companies.370253B-01 © Copyright 2000 National Instruments Corp. All rights reserved. November 2000CALIBRATION PROCEDURESCXI -1303 TERMINAL B LOCKIntroductionThis document contains information and step-by-step instructions forverifying the performance of the temperature sensor on theNational Instruments SCXI-1303 terminal block. This temperature sensoris for cold-junction compensation of thermocouples on the terminal block.What Is Calibration?Calibration consists of verifying the measurement accuracy of a device andcorrecting for any measurement error. For SCXI-1303 terminal blocks,calibration is simply verifying the measurement accuracy of thecomponents on the terminal block. Because these components are notuser-adjustable, calibration consists of verification only, without correctingfor any error. Verification is measuring the performance of a device andcomparing 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. Verificationensures that your SCXI-1303 terminal block still meetsNational Instruments standards. If the results of the procedure indicate thatthe temperature sensor on your terminal block is out of specification, returnthe sensor to National Instruments for repair or replacement.How Often Should You Verify?The measurement accuracy requirements of your application determinehow often you should verify the performance of your SCXI-1303 terminalblock. National Instruments recommends you verify your terminal blockat least once every year. You can shorten this interval to six months or90 days, based on the demands of your application.™