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6. Temperature
The basic quantity in the field of thermal quantities is temperature, specifically thermodynamic temperature. The SI base unit is the kelvin (symbol K), used to express thermodynamic temperature values.
6.1 Definition of kelvin: paradigm shift
The kelvin is one of the four units whose definition changed at the 26th General Conference on Weights and Measures in November 2018. On this occasion, the international system of units underwent a major revision that now links the main units of measurement to the fundamental constants of nature. The kelvin is now defined in relation to a fixed value of Boltzmann's constant as follows
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Temperature
Quantity of material
Bibliography
Websites
BIPM documents :
BIPM, Recommended values of standard frequencies
http://www.bipm.org/fr/publications/mep.html
BIPM, Recommendation S 2 (CCDS, 1970) Definition of TAI
...Standards and norms
- Référence Materials: selected terms and definitions - ISO Guide 30 - 2015
- Exigences générales concernant la compétence des laboratoires d'étalonnages et d'essais - ISO/CEI 17205 - 2017
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French metrology :
http://www.metrologie-francaise.fr
Laboratoire national de métrologie et d'essais, France :
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