A thermocouple indication is taken from the
- hot junction
- cold junction
- difference between the hot junction and the cold junction
Explanation
A thermocouple generates an EMF proportional to the temperature difference between its measuring (hot) junction and its reference (cold) junction. The instrument therefore reads that difference, and accurate temperature requires cold-junction compensation; the output depends on neither junction alone.
serzeb asking:
Cant understand this answer, it is suppose to be difference b/w hot and cold.please explain why only cold junction.
Community Comments (3)
M
MridulDev Posts: 48 24.09.2013 / 06:48
look for "seebek effect on internet", answer is correct you don't need to get confused. check out the pic link below for quick reference.
http://www.daviddarling.info/images/Seebeck_effect.gif
http://www.daviddarling.info/images/Seebeck_effect.gif
R
raulsburgos Posts: 2 10.09.2018 / 12:23
Them, the answer in the web is not correct no?
A
ademceven Posts: 8 19.02.2020 / 12:25
its sayin the indication taken from it doesnt say where the current occurs
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