Thermocouple cold junction compensation release time: 2019 - 03 - 14 reading times: zero1

Thermocouple cold end temperature compensation in industrial production, due to the thermocouple material are relatively expensive, especially when using precious metals, but temperature measuring point to the instrument in the distance, the distance between the thermocouple materials to save and reduce production cost, usually using compensation conductor should be extended the free end of the cold junction of the thermocouple to be stable temperature control room, connected to the meter terminals. Must pay attention to the matter, thermocouple compensation function extension hot electrode wire only, to move into the control room of the cold junction of the thermocouple meter terminal, it itself does not remove the cold end temperature change on the influence of temperature, can't act as compensation. So, still need to use other correction method to compensate of the cold end temperature t0 indicates influence on measuring temperature 0 ℃. Must pay attention to when using thermocouple compensating conductor model match, not wrong, the important thing is the compensation to the wire connected to the thermocouple temperature should not exceed 100 ℃, otherwise it will affect the normal production run.