Investigation of the Accuracy of the ITS‐90 with Reference to Thermodynamic Temperature in the Range from 400° C up to 600° C
- For several years Physikalisch‐Technische Bundesanstalt (PTB) has performed thermodynamic temperature measurements on a large area blackbody applying filter radiometers (FR) based on silicon photodiodes and interference filters with center wavelengths at 676 nm, 800 nm, 900 nm, and 1000 nm. These FRs were used for the determination of possible systematic deviations of temperatures measured according to the International Temperature Scale of 1990 (ITS‐90), T90, and the thermodynamic temperatures T. The measurements in 1995 with the 676‐nm‐FR and the 800‐nm‐FR revealed a difference of 50 mK of T−T90 at temperatures around the freezing point of silver (961.78 °C). The observed difference decreases with decreasing temperatures, indicating that it may be attributed to a systematic deviation in the ITS‐90 from T due to the gas thermometric temperature measurement at 457 °C, which has …
Metadaten| Author: | Jürgen Hartmann |
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| ISBN: | 0-7354-0153-5 |
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| Parent Title (English): | AIP Conference Proceedings (684) |
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| Publisher: | American Institute of Physics |
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| Document Type: | Conference Proceeding |
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| Language: | English |
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| Year of publication: | 2003 |
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| Publishing Institution: | Hochschule für Angewandte Wissenschaften Würzburg-Schweinfurt |
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| Release Date: | 2020/12/04 |
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| First Page: | 7 |
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| Last Page: | 12 |
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| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 536 Wärme |
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