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| Calibrating Pyrometers with High Temperature Fixed Points |
| LU Xiao-feng1,YUAN Zun-dong1,DONG Wei1,WANG Tie-jun1,LUAN Hai-feng2,XIAO Xiao-ting3 |
1. National Institute of Metrology, Beijing 100029, China
2. Jiangsu Institute of Metrology, Nanjing, Jiangsu 210023, China
3. Institute for Metrology and Calibration of Guizhou, Guiyang, Guizhou 550003,China |
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Abstract A 0.65 μm and a 0.9 μm pyrometers are interpolated by three high temperature fixed points (HTFPs), the best uncertainty is estimated 0.3～1.2 ℃ (k=2) in 900～2 500 ℃ for the 0.65 μm pyrometer and 0.3～0.6 ℃ in 600～2 000 ℃ for the 0.9 μm one separately. The pyrometers are also verified by the other fixed points and high temperature blackbody against the primary pyrometer, and the agreement is better than 0.1 ℃. The HTPFs can be applied in the precise calibration of pyrometers to improve the level of measurement uncertainty in high temperature range.
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Received: 08 October 2016
Published: 11 August 2017
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2017, Vol. 38 
