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| Onsite Calibration of the Precision Industrial Platinum Resistance Thermometer Based on Gallium and Gallium-Based Small-size Eutectic Points |
| SUN Jian-ping1,ZENG Fan-chao2,ZHANGLin3,ZENG Bin2,FANG Xin-yun4 |
1. National Institute of Metrology, Beijing 100029, China
2.Chengdu University of Technology, ChengduSichuan 610059,China
3.Qingdao Institute of Measurement Technology, Qingdao Shandong 266000, China
4.Suzhou Institute of Measurement and Testing Technology, Suzhou Jiangsu 215128, China |
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Abstract Onsite thermometer calibration with the temperature scale calibration technology based on fixed points is an effective means to improve the level of industrial temperature measurement and calibration. The small-size eutectic point including Ga-In (15.7 ℃), Ga-Sn (20.5 ℃), Ga-Zn (25.2 ℃) and Ga fixed point (29.7 ℃) with a portable multi-point automatic realization device are developed to explore the onsite calibration of the precision industrial platinum resistance thermometer near room temperature. The results show that the temperature plateaus and reproducibility of the Ga-In,Ga-Sn,Ga-Zn eutectic points and Ga fixed point are above 2 h and better than 5mK respectively. This research will offer the technique supports for the onsite calibration of temperature sensor of blackbody forinfrared remote sensing satellite.
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2015, Vol. 36 
