Compensating cable are used as connection lead From the Probe (Thermocouple) to the measuring Instrument (Temperature Indicator) . These cables incorporate different alloys which give the same emf output (With in a limited temperature range) as those in the thermocouple.
There for it is essential that a cable is used which has the same emf output as The Thermocouple; otherwise spurious emf is generated at these junction. Compensating. Cable provides convenient, economic solution with in probe indicator. Compensating Cable is require as per type (J/K/R/S/RTD) of Thermocouple.
Compensating cable has two cores (positive negative) each core has different colour code for reorganisation of the polarity, Compensating Cables are insulated by PVC/ PVC, fibreglass/fibreglass, Fibreglass/fibreglass/SS, Fibreglass/fibreglass/asbestos having different conductor size Like 3/24 SWG, 3/26 SWG, 7/26 SWG, 7/36 SWG