CJC temperature of the cable end

Cold Junction Compensation = CJC

Compensating temperature measurement is needed in the point where compensating or extension cable is changed to copper cable. This point - cold junction - can be located e.g. by a terminal block inside a field enclosure or by terminals of a transmitter. More details on page: How do TC sensors work?

Cold Junction Compensating with PR temperature transmitters

• If compensating cable is wired to PR 5100 series transmitter, a separate CJC connector must be changed on transmitter. CJC connector has a Pt100 resistor build in for measuring the connection temperature.
• 2-wire transmitters of PR 5300/5400 series can be wired directly to terminal screws. These transmitters have an internal compensating sensor, which can be set on or off with software.