Compensation wires of various graduation numbers can only be used with thermocouples of the same graduation number, otherwise it may be under-compensated or over-compensated. See the thermoelectric potential values of commonly used thermocouples at 100°C and 200°C.
The thermoelectric potential values of commonly used thermocouples at 100°C and 200°C, so the compensation wire that matches the thermocouple material can be used to replace the expensive thermocouple material that needs to be extended, and the reference terminal is extended from the thermocouple junction box to the digital display. At the terminal, the temperature of the original reference terminal is compensated by the compensation wire. In addition to reducing the measurement error, the compensation wire has the following advantages: it can improve the physical and mechanical properties of the thermocouple temperature measurement circuit. For example, the use of multi-stranded core or small-diameter compensation wire can improve the flexibility of the circuit and make the connection convenient. It is also easy to shield external interference; it can reduce the cost of the measurement circuit.
