热敏电阻温度因数的测定热敏电阻温度因数的测定

Measurement of Temperature Coefficient of Thermistor

为保证测量系统为孤立系统、平衡状态，采用同温场辐射法测量热敏电阻温度因数，论述了热敏电阻的特点、分类以及测量装置的设计思想．这种实验装置既保证了温度测量的精度，又减小了由于非热平衡所造成的系统误差．为保证热敏电阻阻值与温度对应的同步性，采用了两台电桥定时同步自动记录装置。

In order to keep the measuring system in isolated and balanced state, isothermal field radiation method was applied to measure the temperature factor of thermistor . The characteristic and classification of thermistor and the design idea of the measuring instrument were demonstrated. This instrument guarantees the precision of temperature measuring and decreases the system error caused by the non thermal balance . In order to ensure the synchronization of the resistance and temperature of thermistor, two electric bridge time synchronizous automatic recording instruments were used. Finally, the measuring results were analyzed and discussed.