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what do you mean by CJC (cold junction compensation).?
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Answer Posted / nilesh karpe
CJC-IS the cold junction compantion.it is used in
thermocouple.two dissimiler metals joined together it forms
thermocouple.if we apply voltage tn one junction is hot &
another becomes cold Junction.
such Thermocouple generates MV output signal according
to metal characterstics.it gives 0 mv for 0 degree. to
measure actual temperature of the measuring point we should
remove the temp. of measurment envirnment for that the
compansation equals to surrounding temp. is provided and
used as 0mv.
This ref. 0V is generated by Three Methodes-A)Electronic's
0 V ref.,B)Ice bath Methoad,C)by using Peltier cooler .
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