CONSTRUCTION AND CHARACTERISATION OF THE UME MADE WATER TRIPLE POINT CELLS
Ali Uytun, Aliye Kartal Dogan, Sevilay Ugur
Abstract:
The International Temperature Scale of 1990 (ITS-90) specifies triple, melting and freezing points to realize the scale. One of the major temperature fixed points in the ITS-90 scale is the triple point of water (TPW), at which temperature solid, liquid and vapour phases of pure water coexist in thermal equilibrium. This temperature has been assigned a value of 273,16 K (0,01°C) on the ITS-90. It is the fundamental definition of the fixed point of the ITS- 90 scale and the one defining fixed point of the Kelvin thermodynamic temperature scale.
UME Temperature Laboratory has been constructing TPW cells since 1992. This paper describes the construction processes (annealing, cleaning and filling) of the TPW cell, its realization and finally the results of EUROMET comparison of TPW cells.
Keywords:
TPW, realization, comparison
Download:
PWC-2003-TC12-002.pdf
DOI:
-
Event details
Event name:
XVII IMEKO World Congress
Title:

Metrology in the 3rd Millennium

Place:
Dubrovnik, CROATIA
Time:
22 June 2003 - 28 June 2003
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