CIPM MRA COMPARISON REPORTS
KEY COMPARISON
CCT-K9.3
Authors
https://orcid.org/0009-0001-2022-5579
Centro de Estudios, Medición y Certificación de Calidad (CESMEC)
Chile
https://orcid.org/0009-0001-7589-5473
Georgian National Agency for Standards and Metrology (GEOSTM)
Georgia
https://orcid.org/0009-0008-2401-5561
Laboratorio Costarricense de Metrologia (LACOMET)
Costa Rica
https://orcid.org/0000-0002-4358-7804
National Metrology Institute of South Africa (NMISA)
South Africa
Abstract
This report shows the results of a comparison of temperature standards between five national metrology institutes (CEM, CESMEC, GEOSTM, LACOMET and NMISA) in a schema were the pilot, CEM, is acting as the link to the CCT-K9 key comparison reference value, via CEM's participation in EURAMET.T-K9.
The measurands of this comparison were the W(t90) ratios of standard platinum resistance thermometers, used as transfer standards, measured at the zinc freezing point (Zn FP, 419.527 °C), tin freezing point (Sn FP, 231.928 °C), gallium melting point (Ga MP, 29.7646 °C), mercury triple point (Hg TP, -38.8344 °C) and argon triple point (Ar TP, -189.344 2 °C).
Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.
The final report has been peer-reviewed and approved for publication by the CCT, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).