Thermocouple Cold Junction Compensation Method

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The Dataforth MAQ20-JTC, -KTC, -TTC and -RSTC thermocouple, input modules have eight differential input channels, which are grouped into four blocks of two channels. Each block has a terminal for sensor shield ground as well as a dedicated ambient temperature sensor that is optimally positioned to accurately measure the terminal block temperature in any system configuration, any module orientation, and over the entire operating temperature range of -40°C to +85°C. Four cold junction compensation (CJC) temperature sensors are located in a space of only two inches. Precise cold junction compensation can only be accomplished with precise measurement of the terminal block temperature where the dissimilar metal, wire pair is terminated. Keep reading and learn about A physics problem in thermocouple application.

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