Procedimiento para la caracterización de una celda de punto triple de agua Isotech en el LATU

Authors

  • Ofelia Robatto Departamento de Metrología, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • Andrea Sica Departamento de Metrología, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • Claudia Santo Departamento de Metrología, Laboratorio Tecnológico del Uruguay (LATU), Uruguay

DOI:

https://doi.org/10.26461/03.08

Abstract

The Realization of the Triple Point of Water (TPW) is of main importance when approximating to the International Temperature Scale of 1990 (ITS-90), because it is properly involved in its definition. Therefore it is necessary to know the Hydrostatic Pressure influence at the Triple Point of Water to correct the values of resistance measured and to obtain a better approximation of the real temperature of this point. This article shows the difficulties found when studying the thermal profile of one commercial cell of the triple point of water under normal operation conditions in a Dewar thermostatic bath with crushed ice. The work was performed in two phases. In the first phase problems were detected with the temperature profiles, whose behaviors were far away from the
ideals ones. To improve this behavior changes were made in the equipment. The isolation of the bath was improved and copper bushing was set up into the well of the cell. Results are discussed in this paper.

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References

PRESTON-THOMAS, H. The International temperature scale of 1990 (ITS-90). En: Metrologia. 1990, (27):3-10.

SAKURAI, Hirohisa. Hydrostatic pressure correction coefficient of the triple point cell of water [En línea]. Cedrex: Bureau International des Poids et Mesures, [s.d.], [Consulta: 27 de marzo de 2008]. (CCT; 05-11). Disponible en: http://www.bipm.org/cc/CCT/Allowed/23/CCT_05_11.pdf.

How to Cite

Robatto, O., Sica, A., & Santo, C. (2011). Procedimiento para la caracterización de una celda de punto triple de agua Isotech en el LATU. INNOTEC, (3 ene-dic), 49–53. https://doi.org/10.26461/03.08

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