Thermoelectric EMF of thermocouple has temperature of warm contact and cold contact
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- Chinese name
- Cold junction
- Difference
- Thermoelectric EMF of thermocouple has temperature of warm contact and cold contact
- Temperature of temperature contact
- Even if the temperature measurement data is unchanged, it will change
- Via
- Other temperature sensors are used to detect the temperature of cold junction (terminal connected to thermocouple)
Thermoelectric EMF of thermocouple has temperature difference between warm contact and cold contact. Therefore, after the temperature of the cold contact changes, the temperature of the warm contact will change even if the temperature measurement data is unchanged. Therefore, through other Temperature sensor To detect the temperature of the cold contact (terminal connected to the thermocouple), usually carry out power compensation to keep the temperature of the cold contact at 0 ℃. This action is called cold junction compensation. 
