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Article
T 90 Measurement of Co-C, Pt-C, and Re-C High-Temperature Fixed Points at the NIM
The blackbodies of high-temperature fixed points (HTFPs), namely, Co-C, Pt-C, and Re-C eutectic points, were gradually established at the National Institute of Metrology (NIM) of China after 2007, and their ch...
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Article
Spectral Radiation Drift of LEDs Under Step-Mode Operation and Its Effect on the Measurement of the Non-Linearity of Radiation Thermometers
The non-linearity (NL) of radiation thermometers is critically involved when realizing ITS-90 above the silver point. It has to be corrected for, and its uncertainty should be adequately specified. In this art...
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Article
On the Freezing and Melting Behavior of the Eutectic Pt–C
The feasibility of referring to freezing as an alternative to melting for defining the eutectic transition temperature has been studied using two Pt–C cells constructed at NIM, one of a sleeve type, and the ot...