基于微型镓固定点的精密铂电阻温度计原位校准的研究

基于固定点温标传递技术,设计可在镓熔点原位校准的精密铂电阻温度计,并对微型固定点相变温坪特性进行实验分析.实验结果表明:微型镓固定点温坪可持续最大时长为1.2h,温坪在20 min内稳定性优于2.8 mK,复现性优于2.3 mK;微型固定点温坪值与加热温度之间存在线性关系,并且随着加热温度的升高,固定点温坪值越高,通过...

Study on In-situ Calibration of Precision Platinum Resistance Thermometer Based on Micro Gallium Fixed-point

Based on the transfer technology of fixed-point temperature scale, a precision platinum resistance thermometer which can be calibrated in-situ at the melting point of gallium was designed and the characteristics of the micro fixed-point phase change temperature level were analyzed experimentally. The experimental results show that the maximum duration of the fixed temperature plateau is 1.2h, the stability of the plateau is better than 2.8mK and the reusability is better than 2.3mK within 20min. There is a linear relationship between the micro fixed-point temperature level and the heating temperature, and as the heating temperature increases, the temperature plateau value of the fixed-point increases, and the fixed-point temperature level at different heating temperatures can be calculated by fitting formula.