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Comparison of the New NPL Primary Standard Ag Fixed-Point Blackbody Source with the Primary Standard Fixed

  • Above the freezing point of silver (96178 C), the International Temperature Scale of 1990 is defined in terms of Planck's radiation law. The scale is maintained and disseminated using a validated and linear pyrometer in conjunction with a blackbody reference source at either the Ag, Au (1064.18 C) or Cu (1084.62 C) freezing point. In order to realize the scale with the highest precision high quality, well-characterised, reproducible fixed-point blackbody sources are required. Such sources have been maintained at NPL for a number of years, but it was felt that improvements to the design would be beneficial. A new Agpoint blackbody source has therefore been constructed. The new design will improve the quality and reproducibility of the melting and freezing plateaux and reduce errors due to the “out-of-focus” size-of-source effect which is difficult to measure and to eliminate. Full details of the design of the new source …

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Metadaten
Author:Jürgen Hartmann
Persistent identifier:https://www.researchgate.net/profile/Graham_Machin/publication/252572390_Comparison_of_the_New_NPL_Primary_Standard_Ag_Fixed-Point_Blackbody_Source_with_the_Primary_Standard_Fixed_Point_of_PTB/links/00b4952efb53eca21d000000/Comparison-of-the-New-NPL-Primary-Standard-Ag-Fixed-Point-Blackbody-Source-with-the-Primary-Standard-Fixed-Point-of-PTB.pdf
ISBN:0-7354-0153-5
Parent Title (English):Temperature: Its measurement and control in science and industry, volume 7
Publisher:American Institute of Physics
Editor:Dean C. Ripple
Document Type:Part of a Book
Language:English
Year of publication:2003
Publishing Institution:Hochschule für Angewandte Wissenschaften Würzburg-Schweinfurt
Release Date:2020/12/04
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 536 Wärme
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