Thermocouple is a commonly used temperature measuring instrument, which is widely used in the field of temperature measurement. When users use thermocouples, they often cause a lot of problems due to input errors, so how should these problems be dealt with?
1. The wiring is correct according to the wiring diagram of the digital display. If the digital tube on the meter displays a negative value after the meter is powered on, it means that the thermocouple connected to the meter "+" and "-" are connected incorrectly and only need to be replaced. Just one click. How to deal with errors in connection between thermocouple and digital display
2. Remove the thermocouple of the above-mentioned faulty instrument, and replace it with the thermocouple connected to the same kind of indexing instrument that is running normally next to it. The internal wiring is open, replace the thermocouple of the same type. If it is still in the above-mentioned condition, it means that the input terminal of the instrument is damaged during transportation, and the instrument needs to be replaced.
3. Remove the faulty thermocouple from the meter, use a multimeter to measure the ohm (r) *1 file, use the two meter rods of the multimeter to measure the two ends of the thermocouple, if the resistance value displayed on the multimeter is very large, it means The internal connection of the thermocouple is open. Replace the thermocouple of the same type. Otherwise, there is a certain resistance value, indicating that there is a problem with the input end of the meter, and the meter should be replaced.
4. Remove the compensation wire of the thermocouple from the input end of the digital display, and then use any wire to short-circuit the input end of the thermocouple. When the power is turned on, when the display value of the digital tube on the top of the meter is about room temperature, it indicates that the internal connection of the thermocouple is open, and the thermocouple of the same type should be replaced. If it is still in the above-mentioned situation, it means that the input terminal of the instrument was damaged during transportation, and the instrument should be replaced.
