As the temperature rises, the resistance of the ntc thermistor gradually shows a material with a smaller correlation index. Generally speaking, this material can use a variety of different metal elements, two or more than two synthetic oxides. Fully mixed, and in the process of use, the semiconductor ceramics are processed through various high temperature or mixing and molding sintering processes. It can be made into a more unique coefficient thermistor. Its melting resistivity or material constant will gradually change with the composition ratio of the material and the state of the sintering atmosphere, and it will also be oxidized with carbon and other substances. The main thermistor material. What are the functions of ntc thermistor in the circuit?

1. Detect the resistance temperature.

The ntc thermistor has a powerful function in the circuit and can effectively detect the temperature of the resistance. Generally speaking, they are the same as the method of using a multimeter to detect the resistance temperature. In the process of using an analog multimeter to detect , It is entirely possible to do effective detection through different temperature coefficients, and when testing in this way, the entire product needs to be adjusted to the first gear. The specific operation steps can be divided into two steps. During the detection process, ensure that the indoor temperature is around 25 degrees Celsius, and both ratios should be in contact with the two corners of the thermal meter resistance, and then the actual resistance value is measured. Relatively speaking, the resistance value and It is quite normal for the actual resistance value to have a difference between two ohms. If no effective measurement is made, then the entire resistance has been damaged.

In the actual measurement process of the ntc thermistor, the contact measurement is completely performed in the conventional test. When using various things for testing, it is necessary to effectively detect the actual situation of the ntc thermistor, and when When the entire thermistor is normal, the second step can be tested. Generally speaking, the heating test should be performed during the test, and all these heat sources should be heated by the ptc heat source resistance. The same can also be done Use ntc thermistors to monitor the resistance values ​​and see if they will gradually increase with the increase in temperature.

2. Negative temperature coefficient thermistor detection.

The role of ntc thermistor in the circuit also includes the thermistor detection under the negative temperature coefficient. When using the multimeter resistance detection process to measure the quality of the negative temperature coefficient detection, it is basically The above method is still the same as the ordinary method, but the temperature detection effect is relatively more accurate.