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CCT Working Group 4: thermodynamic temperature determinations and extension of the ITS-90 to lower temperatures
CCT summary
General information
CCT members
CCT publications and bibliography
Mise en pratique for the definition of the kelvin
Presentation by Dr Uğur at the 24th meeting of the CGPM
CCT working groups
Photographs of the CCT
Key comparisons
Open access
CCT documents
CCT-WG5 documents
CCT-WG8 documents
TG-SI documents
Restricted access  
CCT working documents
CCT-WG1 documents
CCT-WG2 documents
CCT-WG5 documents
CCT-WG8 documents
TG-SI documents
Discussion Forum
(WG1, WG3, WG5(BBUG), WG6, WG7 and WG8)

Direct access

Terms of reference

The terms of reference of CCT-WG4 are:
    to review and make recommendations concerning thermodynamic temperature determination and the definition of the kelvin.

Working Group 4 is tasked with continuing to review measurements of T — T90 and with monitoring progress on the redefinition of the kelvin in terms of the Boltzmann constant.