Final report on inter-RMO key comparison EUROMET.L-K5.2004

Calibration of a step gauge

Emilio Prieto, Nicholas Brown, Antti Lassila, Andrew Lewis, Michael Matus, Georges Vailleau, Leonardo de Chiffre, Gerard W.J.L. Kotte, Mikael Frennberg, Howard McQuoid, Vít Zelený, Zbigniew Ramotowski, Edit Bánréti, Alexandru Duta, Gian Bartolo Picotto, Kostadin Doytchinov, Jose Carlos Valente de Oliveira, Miguel Viliesid Alonso, Konstantin Chekirda

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The results of the inter-RMO key comparison EUROMET.L-K5.2004 on the calibration of a step gauge are reported. Eighteen National Metrology Institutes and one Designated Institute from four different metrological regions all over the world participated in this comparison which lasted three years, from December 2004 to December 2007.

A lack of stability was observed through the shifting of some of the inserted gauges. In order to save the comparison and get valuable and useful conclusions, it was agreed to exclude four gauges from calculation and assume that only seven gauges were reasonably stable so as to get the corresponding reference values. It was also agreed to divide the participants into two groups, analyze separately their results and, taking the pilot as the linking laboratory, refer the results to common reference values.

The inverse-variance weighted mean was taken as reference value. Due to the significant instability of the step it was also considered an artefact uncertainty. The reported uncertainties ranged from 0.045 µm to 1.2 µm (k = 1). The uncertainty of the artefact ranged from 0.018 µm (for the 20 mm face) to 0.176 µm (for the 400 mm face).

The compatibility of all participants for measuring step gauges was demonstrated with the only exception of a participant showing very high systematic (both positive and negative) errors. Five participants communicated higher uncertainties than the corresponding approved CMCs. A set of Recommendations and Actions were agreed therefore.
Original languageEnglish
Article number04008
JournalMetrologia
Volume49
Issue number1A
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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Prieto, E., Brown, N., Lassila, A., Lewis, A., Matus, M., Vailleau, G., ... Chekirda, K. (2012). Final report on inter-RMO key comparison EUROMET.L-K5.2004: Calibration of a step gauge. Metrologia, 49(1A), [04008]. https://doi.org/10.1088/0026-1394/49/1A/04008
Prieto, Emilio ; Brown, Nicholas ; Lassila, Antti ; Lewis, Andrew ; Matus, Michael ; Vailleau, Georges ; de Chiffre, Leonardo ; Kotte, Gerard W.J.L. ; Frennberg, Mikael ; McQuoid, Howard ; Zelený, Vít ; Ramotowski, Zbigniew ; Bánréti, Edit ; Duta, Alexandru ; Picotto, Gian Bartolo ; Doytchinov, Kostadin ; de Oliveira, Jose Carlos Valente ; Alonso, Miguel Viliesid ; Chekirda, Konstantin. / Final report on inter-RMO key comparison EUROMET.L-K5.2004 : Calibration of a step gauge. In: Metrologia. 2012 ; Vol. 49, No. 1A.
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abstract = "The results of the inter-RMO key comparison EUROMET.L-K5.2004 on the calibration of a step gauge are reported. Eighteen National Metrology Institutes and one Designated Institute from four different metrological regions all over the world participated in this comparison which lasted three years, from December 2004 to December 2007.A lack of stability was observed through the shifting of some of the inserted gauges. In order to save the comparison and get valuable and useful conclusions, it was agreed to exclude four gauges from calculation and assume that only seven gauges were reasonably stable so as to get the corresponding reference values. It was also agreed to divide the participants into two groups, analyze separately their results and, taking the pilot as the linking laboratory, refer the results to common reference values.The inverse-variance weighted mean was taken as reference value. Due to the significant instability of the step it was also considered an artefact uncertainty. The reported uncertainties ranged from 0.045 µm to 1.2 µm (k = 1). The uncertainty of the artefact ranged from 0.018 µm (for the 20 mm face) to 0.176 µm (for the 400 mm face).The compatibility of all participants for measuring step gauges was demonstrated with the only exception of a participant showing very high systematic (both positive and negative) errors. Five participants communicated higher uncertainties than the corresponding approved CMCs. A set of Recommendations and Actions were agreed therefore.",
author = "Emilio Prieto and Nicholas Brown and Antti Lassila and Andrew Lewis and Michael Matus and Georges Vailleau and {de Chiffre}, Leonardo and Kotte, {Gerard W.J.L.} and Mikael Frennberg and Howard McQuoid and V{\'i}t Zelen{\'y} and Zbigniew Ramotowski and Edit B{\'a}nr{\'e}ti and Alexandru Duta and Picotto, {Gian Bartolo} and Kostadin Doytchinov and {de Oliveira}, {Jose Carlos Valente} and Alonso, {Miguel Viliesid} and Konstantin Chekirda",
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Prieto, E, Brown, N, Lassila, A, Lewis, A, Matus, M, Vailleau, G, de Chiffre, L, Kotte, GWJL, Frennberg, M, McQuoid, H, Zelený, V, Ramotowski, Z, Bánréti, E, Duta, A, Picotto, GB, Doytchinov, K, de Oliveira, JCV, Alonso, MV & Chekirda, K 2012, 'Final report on inter-RMO key comparison EUROMET.L-K5.2004: Calibration of a step gauge', Metrologia, vol. 49, no. 1A, 04008. https://doi.org/10.1088/0026-1394/49/1A/04008

Final report on inter-RMO key comparison EUROMET.L-K5.2004 : Calibration of a step gauge. / Prieto, Emilio; Brown, Nicholas; Lassila, Antti; Lewis, Andrew; Matus, Michael; Vailleau, Georges; de Chiffre, Leonardo; Kotte, Gerard W.J.L.; Frennberg, Mikael; McQuoid, Howard; Zelený, Vít; Ramotowski, Zbigniew; Bánréti, Edit; Duta, Alexandru; Picotto, Gian Bartolo; Doytchinov, Kostadin; de Oliveira, Jose Carlos Valente; Alonso, Miguel Viliesid; Chekirda, Konstantin.

In: Metrologia, Vol. 49, No. 1A, 04008, 2012.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Final report on inter-RMO key comparison EUROMET.L-K5.2004

T2 - Calibration of a step gauge

AU - Prieto, Emilio

AU - Brown, Nicholas

AU - Lassila, Antti

AU - Lewis, Andrew

AU - Matus, Michael

AU - Vailleau, Georges

AU - de Chiffre, Leonardo

AU - Kotte, Gerard W.J.L.

AU - Frennberg, Mikael

AU - McQuoid, Howard

AU - Zelený, Vít

AU - Ramotowski, Zbigniew

AU - Bánréti, Edit

AU - Duta, Alexandru

AU - Picotto, Gian Bartolo

AU - Doytchinov, Kostadin

AU - de Oliveira, Jose Carlos Valente

AU - Alonso, Miguel Viliesid

AU - Chekirda, Konstantin

PY - 2012

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N2 - The results of the inter-RMO key comparison EUROMET.L-K5.2004 on the calibration of a step gauge are reported. Eighteen National Metrology Institutes and one Designated Institute from four different metrological regions all over the world participated in this comparison which lasted three years, from December 2004 to December 2007.A lack of stability was observed through the shifting of some of the inserted gauges. In order to save the comparison and get valuable and useful conclusions, it was agreed to exclude four gauges from calculation and assume that only seven gauges were reasonably stable so as to get the corresponding reference values. It was also agreed to divide the participants into two groups, analyze separately their results and, taking the pilot as the linking laboratory, refer the results to common reference values.The inverse-variance weighted mean was taken as reference value. Due to the significant instability of the step it was also considered an artefact uncertainty. The reported uncertainties ranged from 0.045 µm to 1.2 µm (k = 1). The uncertainty of the artefact ranged from 0.018 µm (for the 20 mm face) to 0.176 µm (for the 400 mm face).The compatibility of all participants for measuring step gauges was demonstrated with the only exception of a participant showing very high systematic (both positive and negative) errors. Five participants communicated higher uncertainties than the corresponding approved CMCs. A set of Recommendations and Actions were agreed therefore.

AB - The results of the inter-RMO key comparison EUROMET.L-K5.2004 on the calibration of a step gauge are reported. Eighteen National Metrology Institutes and one Designated Institute from four different metrological regions all over the world participated in this comparison which lasted three years, from December 2004 to December 2007.A lack of stability was observed through the shifting of some of the inserted gauges. In order to save the comparison and get valuable and useful conclusions, it was agreed to exclude four gauges from calculation and assume that only seven gauges were reasonably stable so as to get the corresponding reference values. It was also agreed to divide the participants into two groups, analyze separately their results and, taking the pilot as the linking laboratory, refer the results to common reference values.The inverse-variance weighted mean was taken as reference value. Due to the significant instability of the step it was also considered an artefact uncertainty. The reported uncertainties ranged from 0.045 µm to 1.2 µm (k = 1). The uncertainty of the artefact ranged from 0.018 µm (for the 20 mm face) to 0.176 µm (for the 400 mm face).The compatibility of all participants for measuring step gauges was demonstrated with the only exception of a participant showing very high systematic (both positive and negative) errors. Five participants communicated higher uncertainties than the corresponding approved CMCs. A set of Recommendations and Actions were agreed therefore.

U2 - 10.1088/0026-1394/49/1A/04008

DO - 10.1088/0026-1394/49/1A/04008

M3 - Article

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JO - Metrologia

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