Compensating wires are generally made by replacing thermocouples with wires having the same electron density. The connection between the compensating wire and the thermocouple is usually clear: the positive terminal of the thermocouple is connected to the red wire of the compensating wire, and the negative terminal is connected to the remaining colored wire. Most compensating wires are made of copper-nickel alloy.
Purposes of using compensating wires:
(1) To move the reference end of the thermocouple from a high-temperature location to a location with a more stable ambient temperature.
(2) To save a significant amount of expensive and rare metal materials used in the manufacture of thermocouple electrodes.
(3) To facilitate installation and wiring.
(4) Replacing thermocouple electrodes with thicker diameter compensating wires with higher conductivity reduces the resistance of the thermocouple circuit, facilitating measurement and automatic control.
