Common faults and solutions of muffle furnaces:
Turn on the thermocouple: Turn off the power and open the back cover of the muffle furnace.
(1) Check whether the thermocouple is screwed to the thermocouple lead and make sure that the two are in good contact.
(2) Check the open circuit status of the thermocouple sensor itself. (Can be used for instrument testing, e.g. multimeters)
(3) Check whether the connector, terminal, adapter, etc. between the thermocouple end lead and the circuit board is open or wrong. Sometimes it can be restored after reinsertion, which is caused by the appearance of an oxide layer during installation or when it is at a higher temperature for a long time.
(4) This is not the case for strong interference signals.
Thermocouple reversal: turn off the power and open the back cover of the muffle furnace, and check whether the polarity of the thermocouple end and the input port of the controller thermocouple after the line connection are consistent. (Available visual inspection and instrumental test methods)
Communication interruption: check whether the line interface outside the controller is closed or poorly connected (such as 9-pin serial port, aviation plug and other connections) to ensure reliable connection and good contact.
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