Precautions to be taken during the use of multi-point thermocouples

Multi point thermocouples are suitable for production sites with unclear temperature gradients that require simultaneous measurement of multiple locations or multiple measurements of a single location. Multi point thermocouples are widely used in large fertilizer synthesis towers, storage tanks, and other devices. In fact, it is an energy converter that converts thermal energy into electrical energy and measures temperature using the generated thermoelectric potential. During use, the following three things should be noted:
1. The thermoelectric potential of a multi-point thermocouple is the difference in temperature function between the two ends of the working end of the thermocouple, rather than the temperature difference between the cold end and the working end of the thermocouple;

2. The magnitude of the thermoelectric potential generated by a multi-point thermocouple is not related to the length and diameter of the thermocouple when the material is uniform, but only to the composition of the thermocouple material and the temperature difference at both ends;

3. After determining the material composition of the two thermocouple wires of a multi-point thermocouple, the magnitude of the thermoelectric potential of the thermocouple is only related to the temperature difference of the thermocouple; If the temperature of the cold end of the thermocouple remains constant, the thermoelectric potential of the thermocouple is only a single value function of the working end temperature.