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| Multi-wavelength Effective Radiance Temperature Calibration and Characteristics Analysis of Traceable Approaches of the Blackbody Radiation Sources |
| YUAN Zun-dong, HAO Xiao-peng, WANG Jing-hui, WANG Tie-jun, XING Bo, BAI Cheng-yu, YANG Xue |
| National Institute of Metrology, Beijing 100029, China |
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Abstract The standard variable temperature blackbody radiation sources (VTBBs) and comparison facility of effective radiance temperatures established at the National Institute of Metrology of China are introduced. The approaches of radiance temperature comparison with standard blackbodies and of radiance temperature dissemination using standard radiation thermometers for multi-wavelength(waveband) effective radiance temperature calibration of the customer’s VTBBs are described. Characteristics of the effective emissivity and the probe temperature difference of VTBBs under calibration are evaluated based on calibration results of two typical VTBBs. The characteristics of three traceable methods and the influences on application of VTBBs are analyzed. The temperature controlled reproducibility is a novel concept of the temperature controlled reproducibility presented here and a key parameter but ignored by researches and applications before. The multi-wavelength effective radiance temperature calibration is a new traceable approach which can reduce or eliminate the influences of the effective emissivity and the probe temperature difference, and complementary with the traditional traceable method using standard contact thermometer. This approach is useful for evaluation of the VTBBs’ effective emissivity and probe temperature difference, and can give an optimal result for the VTBBs and very good in temperature controlled reproducibility.
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Received: 29 January 2016
Published: 28 February 2017
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| Fund:Chinese Quality Inspection Public Welfare Research Project |
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Corresponding Authors:
Zun-dong YUAN
E-mail: yuanzd@nim.ac.cn
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2017, Vol. 38 
