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The production of modern platinum thermometers were based on Callendar’s model with the accuracy continually improved on, such as more purified platinum and making them smaller. [11] His work on the platinum resistance thermometer gave way for the development of the rolling-chart thermometer, which permits the measurement of climatic ...
While thermocouples use the Seebeck effect to generate a voltage, resistance thermometers use electrical resistance and require a power source to operate. The resistance ideally varies nearly linearly with temperature per the Callendar–Van Dusen equation. The platinum detecting wire needs to be kept free of contamination to remain stable.
The Callendar–Van Dusen equation is an equation that describes the relationship between resistance (R) and temperature (T) of platinum resistance thermometers (RTD). As commonly used for commercial applications of RTD thermometers, the relationship between resistance and temperature is given by the following equations.
5 Resistance thermometer vs platinum resistance thermometer. 1 comment. 6 Wiring configurations. 4 comments.
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IEC 60751 Industrial platinum resistance thermometers and platinum temperature sensors; IEC 60754 Test on gases evolved during combustion of materials from cables; IEC TR 60755 General requirements for residual current operated protective devices; IEC 60756 Non-broadcast video tape recorders – Time base stability; IEC 60757 Code for ...
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