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thermocouple
thermocouple
Dernière mise à jour : 2021-10-01
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the objective of this experiment was to study the principal and operation of level measurement using thermocouple. and it is also to study the principal and operation of level measurement using rtd & calibration. a thermocouple is a sensor that measures temperature. it is comprised of at least two metals joined together to form two junctions. when heat applied, voltage (mv) is generated the joined produce a thermal electromotive force (emf) when junctions at different temperature. the principle for rtd is every metal is unique composition and has a different resistance to flow electrical current. most metal, changes electrical resistance directly proportional to change of temperature. it is called temperature coefficient of electrical resistance (tcr). based on the experiment, thermocouple is more accurate compared to the rtd. it already showed in each table if smaller the deviation difference, more accurate the reading. rtd resistance is varies according to temperature, when temperature increase, the resistance also increases. various ambient temperatures will affect the accuracy and reliability of rtd, thermocouple type j and k. variations in ambient temperature also can directly affect the resistance of components in a rtd and the resistance of the reference junction for a thermocouple type j and k.
Dernière mise à jour : 2020-09-12
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