What criteria should be used to determine that a type K thermocouple is defective/starting to fail? - Quora
Read Temperature by Measuring Millivolts
K Type Thermocouple Calibration, Convert Thermocouple Voltage to Temperature, ITS-90 Thermocouple Polynomial Coefficients, Type K Thermocouple Temperature Measurement Using Microcontrollers, Convert Thermocouple Temperature to Voltage