Transcription of Measuring Temperature with RTDs – A Tutorial
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_____Product and company names are trademarks or trade names of their respective Copyright 1996 National Instruments Corporation. All rights 1996 Application Note 046 Measuring Temperature withRTDs A TutorialIntroductionA resistance- Temperature detector (RTD) is atemperature sensing device whose resistance increaseswith Temperature . An RTD consists of a wire coil ordeposited film of pure metal. RTDs can be made ofdifferent metals and have different resistances, but themost popular RTD is platinum and has a nominalresistance of 100 at 0 are known for their excellent accuracy over awide Temperature range. Some RTDs have accuraciesas high as ( C) at 0 C. RTDs are alsoextremely stable devices. Common industrial RTDsdrift less than C/year, and some models are stableto within can be difficult to measure because they haverelatively low resistance (100 ) that changes onlyslightly with Temperature (less than / C).
Introduction A resistance-temperature detector (RTD) is a temperature sensing device whose resistance increases with temperature. An RTD consists of a wire coil or deposited film of pure metal. RTDs can be made of different metals and have different resistances, but the ...
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