Andrew Lewis and Nicola Testa 2009 Metrologia 46 04002 doi:10.1088/0026-1394/46/1A/04002
Andrew Lewis1 and Nicola Testa2
Show affiliationsThe results of supplementary comparison EUROMET.L-S16 are reported. This was a comparison on the measurement of gauge block central length using mechanical comparators. Eleven NMIs took part, including the two pilot laboratories—NPL and MSA, and a EURAMET Corresponding NMI—INPL. The artefact circulation took place from June 2004 to December 2005 and sixteen gauges block were circulated, eight in steel, eight in tungsten carbide. The measurand was the central length of the gauge blocks, determined as the deviation from nominal length. Participants were also asked to measure, if possible, the variation in length, as determined from measurements at five locations on the gauge surface. The results were analysed using the weighted mean and all laboratories' results are in agreement with the weighted mean, within the 95% confidence level uncertainty bounds, i.e. there are no outliers. This is also the case for the determination of the central length and also the variation in length.
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 EURAMET, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).
Issue 1A ( 1 January 2009)
Andrew Lewis and Nicola Testa 2009 Metrologia 46 04002
L Koenders et al 2004 Metrologia 41 04001
Otto Jusko et al 2006 Metrologia 43 04006
Howard McQuoid and Zbigniew Ramotowski 2008 Metrologia 45 04002
Nimai C Nayak et al 2008 J. Micromech. Microeng. 18 095020
Ko Hermans et al 2008 J. Micromech. Microeng. 18 095022
Andrew Lewis 2006 Metrologia 43 04003
G C Sharp et al 2007 Phys. Med. Biol. 52 5771
Adam de la Zerda et al 2007 Phys. Med. Biol. 52 4137
Claude Carignan et al. 1998 The Astronomical Journal 116 1690