Key international comparison of AC-DC current transfer standards CCEM-K12

• Autores: Budovsky, I.; Lipe, T. E.; Filipski, P. S.; Laiz, H.; Funck, T.; Garcocz, M.; Espedalen, J. H.; Rydler, K.; Chua, S. W.; Borghi, G.; Wheaton, A.; Telitchenko, G. P.
• Año de publicación: 2012
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Metrología, 49
• Materia: Metrología; Transferencia; Corriente alterna; Corriente continua; Mediciones eléctricas
• Institución: Instituto Nacional de Tecnología Industrial

The circulation of the travelling standards in the CIPM key comparison CCEM-K12 of AC–DC current transfer difference began in March 2005 and was completed in April 2007. The travelling standards were lost on their way from the last participant to the pilot laboratory. Since, prior to their disappearance, the travelling standards exhibited exceptional stability, the CCEM Working Group on Low-Frequency Quantities decided in June 2008 to accept the results of the comparison as valid without the final measurement by the pilot laboratory. The AC–DC transfer differences of the travelling standards have been measured at 10 mA and 5 A, and at the frequencies 10 Hz, 55 Hz, 1 kHz, 10 kHz, 20 kHz, 50 kHz and 100 kHz. The key comparison reference values were calculated as the weighted means of the results of the National Metrology Institutes (NMIs) with independent realizations of primary standards and low reported uncertainties. The degrees of equivalence relative to the key comparison reference values, as well as between pairs of NMIs, have been determined for the measurement points and show very good agreement. All but three of the calculated degrees of equivalence relative to the key comparison reference values are within the limits of the expanded uncertainties.
Fil: Budovsky, I. National Measurement Institute (NMIA); Australia
Fil: Lipe, T. E. National Institute of Standards and Technology (NIST); Estados Unidos
Fil: Filipski, P. S. National Research Council Canada. Institute for National Measurement Standards (NRC-INMS); Canadá
Fil: Laiz, H. Instituto Nacional de Tecnología Industrial (INTI); Argentina
Fil: Funck, T. Physikalisch-Technische Bundesanstalt (PTB); Alemania
Fil: Garcocz, M. Bundesamt für Eich- und Vermessungswesen (BEV); Austria
Fil: Espedalen, J. H. Justervesenet (JV); Noruega
Fil: Rydler, K. SP Technical Research Institute of Sweden; Suecia
Fil: Chua, S. W. National Metrology Centre (NMC); Singapur
Fil: Borghi, G. Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMetro); Brasil
Fil: Wheaton, A. National Physical Laboratory (NPL); Reino Unido
Fil: Telitchenko, G. P. D. I. Mendeleev Institute for Metrology (VNIIM); Rusia