Thermistor is a commonly used temperature sensor, widely used in various industries and fields. However, sometimes the thermistor may malfunction, resulting in inaccurate temperature measurement or malfunction. In this article, we will introduce common fault situations of thermal resistors and corresponding troubleshooting methods.

1. Line disconnection: The circuit of the thermal resistor may be disconnected due to external forces or aging. When the circuit is disconnected, the thermistor cannot transmit signals, resulting in temperature measurement errors or inability to measure. The solution to this problem is to check if the circuit connection is secure, repair or replace the damaged circuit.

2. Line short circuit: Line short circuit is another common fault situation, usually caused by short-circuit contact between lines. A short circuit can cause the temperature measured by the thermistor to be too high or directly damage the thermistor. To solve this problem, it is necessary to check whether the circuit connection is correct and eliminate the short circuit phenomenon.

3. Poor contact: Poor contact between the thermistor and the connector may result in inaccurate temperature measurement. This may be caused by corrosion, dust, or oxidation. The solution to this problem is to clean the connector and ensure good contact.

4. Line interference: Thermistor lines may be affected by external electromagnetic interference, resulting in inaccurate measurement results. To eliminate this issue, shielded circuits or additional ground wires can be used to reduce interference.

5. Thermal resistance aging: After long-term use, thermal resistance may experience aging, leading to an increase in measurement deviation. Regularly check the performance of thermal resistors and replace aging ones as necessary to ensure accurate temperature measurement results.

6. Changes in environmental conditions: Changes in environmental temperature and humidity may have an impact on the performance of the thermistor. According to the actual application situation, choose the appropriate type of thermistor and take corresponding protective measures to ensure the accuracy and stability of the measurement.

In summary, common faults of thermal resistors include line disconnection, short circuit, poor contact, line interference, aging of thermal resistors, and changes in environmental conditions. The methods to eliminate these faults include checking the circuit connections, cleaning the contact parts, using shielded circuits, replacing aging thermal resistors, and taking appropriate protective measures. Regular inspection and maintenance of thermal resistance are key to ensuring its normal operation and accurate measurement.