A technique to compensate for thermocouple errors made when the reference or cold junction is at a temperature other than 0° C. Generally the instrument cold junction will be at room temperature or higher depending on internal heating. An internal sensor is used to measure this temperature to compensate for the thermocouple junction offset.

Thermocouple measurements require a reference to icepoint temperature (0°C), cold Junction Compensation circuitry measures the ambient temperature at the junction and provides necessary compensation. Our STT terminal panels feature a heavy isothermal plate for high-accuracy cold junction compensation.