分度方法对高精度数字温度计测量结果影响的实验研究

铂电阻温度传感器用CVD方程、ITS-90国际温标、多项式方程进行分度,并采用高精度数字温度计显示不同方法的测量结果,以分析不同分度方法对于高精度数字温度计测量结果的影响.在-60～300 ℃进行了实验研究,结果表明,分度方法对于测量结果有一定的影响,在高精度测量条件下可通过方法的选择以提高稳定性和准确度.分度方法的研...

Experimental Study on Scaling Methods of High Accuracy Digital Thermometer Measurement Results

The platinum resistance temperature sensor uses CVD equation, ITS-90 international temperature scale and polynomial equation for indexing, and uses high-precision digital thermometer to display the measurement results of different methods, so as to analyze the influence of different scaling methods on the measurement results of high-precision digital thermometer. The experimental research is carried out at -60~300℃. The results show that the scaling method has a certain influence on the measurement results. Under the condition of high-precision measurement, the stability and accuracy can be improved by selecting the method. The research of scaling method should be based on the stability of platinum resistance temperature thermometer and good accuracy of electrical measuring equipment.