Kenichi Fujii 1, Horst Bettin 2, Anna Peuto 3, Kyung-Ho Chang 4, Philippe Richard 5, Claude Jacques 6, Carmen Matilla Vicente 7 and Luis Omar Becerra 8
1
National Metrology Institute of Japan (NMIJ), 305-8563 Tsukuba, Japan
2
Physikalisch–Technische Bundesanstalt (PTB), 38116 Braunschweig, Germany
3
Istituto di Metrologia 'G Colonnetti' (IMGC), 10135 Torino, Italy
4
Korea Research Institute of Standards and Science (KRISS), 305-600 Taejon, Korea
5
Swiss Federal Office of Metrology and Accreditation (METAS), 3003 Bern-Wabern, Switzerland
6
National Research Council Canada (NRC), K1A 0R6 Ottawa, Canada
7
Centro Español de Metrologia (CEM), 28760 Madrid, Spain
8
Centro Nacional de Metrologia (CENAM), 76241 Querètaro, Mexico
Kenichi Fujii et al 2006 Metrologia 43 07007
This report describes the results on a CIPM key comparison of solid density measurements, which was carried out through July 2001 to May 2003. This CIPM key comparison, designated as CCM.D-K1, was coordinated by the National Metrology Institute of Japan (NMIJ, Japan), Swiss Federal Office of Metrology and Accreditation (METAS, Switzerland) and National Research Council Canada (NRC, Canada). These three national metrology institutes (NMIs) formed a pilot group to determine the technical protocol for this key comparison. A total of eight NMIs, namely NMIJ, Physikalisch-Technische Bundesanstalt (PTB, Germany), Istituto di Metrologia 'G Colonnetti' (IMGC, Italy), Korea Research Institute of Standards and Science (KRISS, Korea), METAS, NRC, Centro Español de Metrologia (CEM, Spain) and National Center of Metrology (CENAM, Mexico), participated in this key comparison. A 1 kg single-crystal silicon sphere, prepared by NMIJ, was circulated to each of the NMIs as a travelling standard. Each NMI determined the mass, volume and density of the travelling standard with respect to the mass standard and solid density standard of each NMI by mass measurement and hydrostatic weighing. The reference value of the density was determined with a relative expanded uncertainty of 2.9 × 10-7. When the degrees of equivalence were evaluated by differences from the reference value, the differences for the mass, volume and density were almost equal to or less than expanded uncertainties of the differences, showing a good equivalence of the capabilities for the solid density measurement at the participating NMIs.
Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).
Issue 1A ( 1 January 2006)
Kenichi Fujii et al 2006 Metrologia 43 07007
Jong S Paik et al 2007 Metrologia 44 07005
A Gosset and T Madec 2005 Metrologia 42 07003
H-J von Martens et al 2003 Metrologia 40 09001
R Thalmann 2002 Metrologia 39 165
Richard Barham 2003 Metrologia 40 09002
L O Becerra et al 2003 Metrologia 40 07004
Nile Oldham et al 2003 Metrologia 40 01003
J Terrien 1972 Metrologia 8 99
L Vitushkin et al 2002 Metrologia 39 407