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| Research on the Calibration of 0.9μm Radiation PyrometerBased on High Temperature Blackbody |
| LUAN Hai-feng1,LU Xiao-feng2,WANG Jing-hui2,BAI Cheng-yu2 |
1. Jiangsu Institute of Metrology, Nanjing, Jiangsu 210023, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract The calibration method of 0.9 μm pyrometer with variable-temperature blackbody as reference source is introduced. The uncertainty source of the pyrometer is analyzed through the measurement of the gain ratio, the size-of-source effect and the distance effect. Moreover, the other vital factors such as stability and uniformity of high-temperature blackbody are analyzed. The new method extended the wavelength range of the existing pyrometer. The expanded uncertainties of the scale are 0.6～1.2 ℃ （k=2） between the temperature range 600～2 000 ℃.
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2015, Vol. 36 
