App1-2
IM CA71-E
■ Using a Cold Junction Compensator
A cold junction compensator can be used when, for example,
it is not possible to use an RJ sensor. The use of a cold junction
compensator enables the reference junction to be 0°C.
Cold junction compensator: Yokogawa T-MJ or the equivalent
H L
SOURCE
CA71
H
L
Cold junction compensator
<Using a cold junction compensator>
Device under calibration
(thermometer)
Lead cables
Thermo-
couple
0
°C
■ Using a bult-in RJ Sensor
When a built-in RJ sensor is used, a difference in temperature may
exist between the terminal of the calibrator and the thermometer.
H L
SOURCE
H
L
CA71
Lead cables
Device under verification
(thermometer)
<Using a built-in RJ sensor>
Built-in RJ sensor
A difference
in temperature
may exist between
terminals.
Appendix 1 Reference Junction Compensation
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