Question { 9658 }

Generally in which location ( JB or IO card or DCS) the
thermocouple compensation is done.Also where they measure
the atmosphere temp ( for compensation) in JB OR DCS panel?
How they compensating that atmosphere temp? is any circuit
for that ( like in rtd wheatstone bridge)?

Answer

Actually compensation is done in Transmitter.Transmitter
have one IC which cslculate ambient temperture.
2.If output of thermocouple is mV then compensation is done
in DCS .
In DCS one temperture sensor is connect to Analog
input card .This sensor measure room temperture using this
temperture we can calculate T/C compensation.