MEASURAND : Internal diameter
GAUGE : 3.5/5 mm ring

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Group 1 and Group 2 laboratories (red diamonds) shown on the left and on the right, respectively, with linking laboratories (pink diamonds) in the middle of the graph

MEASURAND : Internal diameter
GAUGE : 40 mm ring

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Group 1 and Group 2 laboratories (red diamonds) shown on the left and on the right, respectively, with linking laboratories (pink diamonds) in the middle of the graph

MEASURAND : External diameter
GAUGE : 4/5 mm plug

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Group 1 and Group 2 laboratories (red diamonds) shown on the left and on the right, respectively, with linking laboratories (pink diamonds) in the middle of the graph

MEASURAND : External diameter
GAUGE : 50 mm plug

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Group 1 and Group 2 laboratories (red diamonds) shown on the left and on the right, respectively, with linking laboratories (pink diamonds) in the middle of the graph

ULATMB = 2 µm

MEASURAND : External diameter
GAUGE : 30 mm sphere

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Group 1 and Group 2 laboratories (red diamonds) shown on the left and on the right, respectively, with linking laboratories (pink diamonds) in the middle of the graph

MEASURAND : Internal diameter
GAUGE : 3.5/5 mm ring

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Results are presented under A4 printable format in Summary Results (PDF file).

MEASURAND : Internal diameter
GAUGE : 40 mm ring

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Results are presented under A4 printable format in Summary Results (PDF file).

MEASURAND : External diameter
GAUGE : 4/5 mm plug

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Results are presented under A4 printable format in Summary Results (PDF file).

MEASURAND : External diameter
GAUGE : 50 mm plug

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Results are presented under A4 printable format in Summary Results (PDF file).

MEASURAND : External diameter
GAUGE : 30 mm sphere

Degrees of equivalence: Di and expanded uncertainty Ui (k = 2), expressed in µm

Results are presented under A4 printable format in Summary Results (PDF file).

Comparison
Comparison close
RMO comparison
Linked comparison
EUROMET.L-K4.2005
Metrology area, Sub-field Length, Dimensional Metrology
Description Outer diameter standards
Time of measurements 2005 - 2007
Status Approved
Final Reports of the comparisons
References

EUROMET.L-K4.2005 Technical Protocol

Measurand Ring, plug, and sphere diameters: from 3.5 mm to 30 mm
Roundness and straightness of the ring and plug gauges

Transfer device Ring and plug gauges, spheres
Comparison type Key Comparison
Consultative Committee CCL (Consultative Committee for Length )
Conducted by EURAMET (European Association of National Metrology Institutes)
RMO Internal Identifier EUROMET Project No 812
Comments

The participating laboratories are split up into two groups:
Group 1, piloted by INRIM, and Group 2, piloted by MKEH.

Results published on 25 April 2012

Diameter standards

Pilot institute INRIM
Istituto Nazionale di Ricerca Metrologica
Italy
Contact person Gian Bartolo Picotto
g.picotto@inrim.it
+39 011 391 9969
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

AS METROSERT

Central Office of Metrology, Estonia, EURAMET

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

CEM

Centro Español de Metrologia, Spain, EURAMET

CMI

Czech Metrology Institute, Czechia, EURAMET

DTI

Danish Technological Institute, Denmark, EURAMET

EIM

Hellenic Institute of Metrology, Greece, EURAMET

GUM

Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET

HMI/FSB-LPMD

FSB - Laboratory for Precise Measurements of Length, Croatia, EURAMET

INM

National Institute of Metrology, Romania, EURAMET

INMETRO

Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM

LATMB

LNMC Metrology Bureau (LATMB), Latvia, EURAMET

LNE

Laboratoire national de métrologie et d'essais, France, EURAMET

METAS

Federal Institute of Metrology, Switzerland, EURAMET

MIKES

VTT Technical Research Centre of Finland Ltd, Centre for Metrology/Mittatekniikan keskus, Finland, EURAMET

MIRS/UM-FS/LTM

MIRS/University of Maribor, Faculty for Mechanical Engineering/Laboratory for Production Management, Slovenia, EURAMET

MKEH

Hungarian Trade Licensing Office; now BFKH, Hungary, EURAMET

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NPL

National Physical Laboratory, United Kingdom, EURAMET

NRC

National Research Council, Canada, SIM

NSAI NML

NSAI National Metrology Laboratory, Ireland, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

SMD

Service de la Métrologie Belge, Belgium, EURAMET

SP

Technical Research Institute of Sweden from 2017 Research Institutes of Sweden AB, Sweden, EURAMET

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Turkey, EURAMET

VSL

VSL, Netherlands, EURAMET

MEASURAND : Internal diameter
GAUGE : 3.5/5 mm ring

The key comparison reference values, xR, were calculated in each group separately, based on the weighted mean, after excluding iteratively laboratories having a poor degree of equivalence until results were consistent.
The combined standard uncertainty of xR is designated as uR.

Group 1 : xR = 20.590 µm and uR = 0.017 µm
Group 2
: xR = 0.290 µm and uR = 0.023 µm

For each group, the degrees of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms: Di = xi - xR and Ui its expanded uncertainty (k = 2).

Linking of the two groups has been done by simply representing the results on a common graph, i.e. by setting the deviation from nominal value of the respective reference values of the two groups arbitrarily to zero. The consistency of the two linked groups with each other is demonstrated by the consistency of the linking laboratories  (METAS, INRIM and NPL) with each of the reference values.

The linking laboratories are shown in the middle of the tables and graphs of equivalence.

The pair-wise degrees of equivalence are not computed for this comparison.

MEASURAND : Internal diameter
GAUGE : 40 mm ring

The key comparison reference values, xR, were calculated in each group separately, based on the weighted mean, after excluding iteratively laboratories having a poor degree of equivalence until results were consistent.
The combined standard uncertainty of xR is designated as uR.

Group 1 : xR = -0.183 µm and uR = 0.016 µm
Group 2
: xR = -0.290 µm and uR = 0.023 µm

For each group, the degrees of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms: Di = xi - xR and Ui its expanded uncertainty (k = 2).

Linking of the two groups has been done by simply representing the results on a common graph, i.e. by setting the deviation from nominal value of the respective reference values of the two groups arbitrarily to zero. The consistency of the two linked groups with each other is demonstrated by the consistency of the linking laboratories (METAS, INRIM and NPL) with each of the reference values.

The linking laboratories are shown in the middle of the tables and graphs of equivalence.

The pair-wise degrees of equivalence are not computed for this comparison.

MEASURAND : External diameter
GAUGE : 4/5 mm plug

The key comparison reference values, xR, were calculated in each group separately, based on the weighted mean, after excluding iteratively laboratories having a poor degree of equivalence until results were consistent.
The combined standard uncertainty of xR is designated as uR.

Group 1 : xR = 0.207 µm and uR = 0.015 µm
Group 2
: xR = -0.120 µm and uR = 0.021 µm

For each group, the degrees of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms: Di = xi - xR and Ui its expanded uncertainty (k = 2).

Linking of the two groups has been done by simply representing the results on a common graph, i.e. by setting the deviation from nominal value of the respective reference values of the two groups arbitrarily to zero. The consistency of the two linked groups with each other is demonstrated by the consistency of the linking laboratories (METAS and INRIM) with each of the reference values.

The linking laboratories are shown in the middle of the tables and graphs of equivalence.

The pair-wise degrees of equivalence are not computed for this comparison.

MEASURAND : External diameter
GAUGE : 50 mm plug

The key comparison reference values, xR, were calculated in each group separately, based on the weighted mean, after excluding iteratively laboratories having a poor degree of equivalence until results were consistent.
The combined standard uncertainty of xR is designated as uR.

Group 1 : xR = -0.270 µm and uR = 0.021 µm
Group 2
: xR = -0.730 µm and uR = 0.033 µm

For each group, the degrees of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms: Di = xi - xR and Ui its expanded uncertainty (k = 2).

Linking of the two groups has been done by simply representing the results on a common graph, i.e. by setting the deviation from nominal value of the respective reference values of the two groups arbitrarily to zero. The consistency of the two linked groups with each other is demonstrated by the consistency of the linking laboratories (METAS and INRIM) with each of the reference values.

The linking laboratories are shown in the middle of the tables and graphs of equivalence.

The pair-wise degrees of equivalence are not computed for this comparison.

MEASURAND : External diameter
GAUGE : 30 mm sphere

The key comparison reference values, xR, were calculated in each group separately, based on the weighted mean, after excluding iteratively laboratories having a poor degree of equivalence until results were consistent.
The combined standard uncertainty of xR is designated as uR.

Group 1 : xR = -11.896 µm and uR = 0.009 µm
Group 2
: xR = -13.830 µm and uR = 0.029 µm

For each group, the degrees of equivalence of laboratory i relative to the key comparison reference value is given by a pair of terms: Di = xi - xR and Ui its expanded uncertainty (k = 2).

Linking of the two groups has been done by simply representing the results on a common graph, i.e. by setting the deviation from nominal value of the respective reference values of the two groups arbitrarily to zero. The consistency of the two linked groups with each other is demonstrated by the consistency of the linking laboratories (METAS and INRIM) with each of the reference values.

The linking laboratories are shown in the middle of the tables and graphs of equivalence.

The pair-wise degrees of equivalence are not computed for this comparison.

MEASURAND : Internal diameter
GAUGE : 3.5/5 mm ring

xi : deviation from nominal length measured by laboratory i
ui
: standard uncertainty of xi

The comparison was carried out in two groups of laboratories: Group 1 and Group 2

* June 2005, Jan & Nov - Dec 2007

** Jan 2006 & Mar - Apr 2009
*** May - Jun 2005, Jun 2006, Jan 2007 & Sep 2008

MEASURAND : Internal diameter
GAUGE : 40 mm ring

xi : deviation from nominal length measured by laboratory i
ui
: standard uncertainty of xi

The comparison was carried out in two groups of laboratories: Group 1 and Group 2

* June 2005, Jan & Nov - Dec 2007

** Jan 2006 & Mar - Apr 2009
*** May - Jun 2005, Jun 2006, Jan 2007 & Sep 2008

MEASURAND : External diameter
GAUGE : 4/5 mm plug

xi : deviation from nominal length measured by laboratory i
ui
: standard uncertainty of xi

The comparison was carried out in two groups of laboratories: Group 1 and Group 2

* June 2005, Jan & Nov - Dec 2007

** Jan 2006 & Mar - Apr 2009
*** May - Jun 2005, Jun 2006, Jan 2007 & Sep 2008

MEASURAND : External diameter
GAUGE : 50 mm plug

xi : deviation from nominal length measured by laboratory i
ui
: standard uncertainty of xi

The comparison was carried out in two groups of laboratories: Group 1 and Group 2

* June 2005, Jan & Nov - Dec 2007

** Jan 2006 & Mar - Apr 2009
*** May - Jun 2005, Jun 2006, Jan 2007 & Sep 2008

MEASURAND : External diameter
GAUGE : 30 mm sphere

xi : deviation from nominal length measured by laboratory i
ui
: standard uncertainty of xi

The comparison was carried out in two groups of laboratories: Group 1 and Group 2

* June 2005, Jan & Nov - Dec 2007

** Jan 2006 & Mar - Apr 2009
*** May - Jun 2005, Jun 2006, Jan 2007 & Sep 2008