The thermocouple of the elevator furnace is actually an energy converter, which converts heat energy into electricity, and measures temperature with the generated thermoelectric potential. For the thermoelectric potential of the thermocouple, it should be noted that the thermoelectric potential of the thermocouple is the difference of the temperature function between the two ends of the thermocouple, not the function of the temperature difference between the two ends of the thermocouple. When the material of thermocouple is uniform, the magnitude of potential is independent of the length and diameter of thermocouple, only related to the composition of thermocouple material and the temperature difference at both ends; when the material composition of two thermocouple wires of thermocouple is determined, the magnitude of thermoelectric potential of thermocouple is only related to the temperature difference of thermocouple; if the temperature difference at the cold end of thermocouple is determined; The thermoelectric potential of the thermocouple in the elevator is only a single function of the temperature at the working end.
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