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Results
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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 20 kPa

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2),
expressed in mm2

Red diamonds: participants in CCM.P-K6
Green triangles: participants in APMP.M.P-K6 only
Blue circles: participants in APMP.M.P-K6.1 only

Orange squares: participants in EURAMET.M.P-K8

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CCM.P-K6 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL PRESSURE : p = 50 kPa

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2),
expressed in mm2

Red diamonds: participants in CCM.P-K6

Orange squares: participants in EURAMET.M.P-K8
 

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CCM.P-K6 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~70 kPa

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2),
expressed in mm2 for participants in CCM.P-K6

From 1st March 2009, NMi-VSL has been named VSL

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2),
expressed in mm2 for participants in EURAMET.M.P-K8

 

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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 100 kPa

Degrees of equivalence, Di and expanded uncertainty Ui (k = 2),
expressed in mm2

Red diamonds: participants in CCM.P-K6
Green triangles: participants in APMP.M.P-K6 only
Blue circles: participants in APMP.M.P-K6.1 only
Orange squares: partcipants in EURAMET.M.P-K8
 

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CCM.P-K2 and EURAMET.M.P-K8

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       20 kPa

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       50 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       70 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       100 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

Comparison
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Results
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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 20 kPa

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value, expressed in mm2

* participants in APMP.M.P-K6 only
**participants in APMP.M.P-K6.1 only

Orange : participants in EURAMET.M.P-K8

Matrix of equivalence inside APMP.M.P-K6.1:

   
Lab iDiUi
 / mm2/ mm2
VSL0.00100.011
METAS-0.02610.050
PTB0.00000.0041
NIST-0.00110.0026
NIM0.00180.0032
NPL-0.00050.0048
NRC0.00020.0027

The matrices of equivalence computed inside key comparisons CCM.P-K6, APMP.M.P-K6 and APMP.M.P-K6.1 are available in Summary Results (.PDF file).

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CCM.P-K6 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL PRESSURE : p = 50 kPa

   
Lab iDiUi
 / mm2/ mm2
VSL0.00120.011
METAS-0.01670.026
PTB0.00050.0032
NIST-0.00130.0026
NIM0.00000.0032
NPL0.00000.0025
NRC-0.00100.0025
METAS*-0.00200.0061
LNE*-0.00410.0055
PTB*0.00060.0033
NSAI NML*-0.00180.0117
MIKES*-0.00430.0069
VSL*-0.00010.0100
NIS*-0.00490.0078
INRIM*-0.00330.0073
UME*-0.00300.0059
EIM*-0.00380.0086
CMI*-0.00260.0061
BEV*-0.00460.0098
MIRS/IMT/LMT*-0.00270.0053
HMI/FSB-LPM*0.00020.0108
IMBIH*-0.00180.0138
CEM*-0.00560.0107
KRISS*-0.00240.0077
INM(RO)*-0.00380.0098
FORCE*-0.01850.0174
IPQ*0.00210.0104
MKEH*-0.00990.0086
MCCAA-SMI*-0.00220.0060

*Participants in EURAMET.M.P-K8

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

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CCM.P-K6 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 70 kPa

Matrix of equivalence inside CCM.P-K6:

   
Lab iDiUi
 / mm2/ mm2
VSL0.00100.011
METAS-0.01580.018
PTB0.00100.0037
NIST-0.00140.0026
NIM0.00090.0032
NPL0.00000.0022
NRC-0.00100.0024

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value, expressed in mm2 for the participants in EURAMET.M.P-K8.

Orange : Participants in EURAMET.M.P-K8

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

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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 100 kPa

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value, expressed in mm2

* participants in APMP.M.P-K6 only
**participants in APMP.M.P-K6.1 only
Orange: participants in EURAMET.M.P-K8
 

Matrix of equivalence inside APMP.M.P-K6.1:

   
Lab iDiUi
 / mm2/ mm2
VSL0.00050.011
METAS-0.01420.016
PTB0.00080.0032
NIST-0.00160.0027
NIM0.00120.0033
NPL0.00000.0022
NRC-0.00140.0026

The matrices of equivalence computed inside key comparisons CCM.P-K6, APMP.M.P-K6 and APMP.M.P-K6.1 are available in Summary Results (.PDF file).

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CCM.P-K2 and EURAMET.M.P-K8

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       20 kPa

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       50 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       70 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       100 kPa

 

CCM.P-K2 and EURAMET.M.P-K8

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm2.

APMP.M.P-K9

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in Pa.

 

Comparison
Comparison close
RMO comparison
Linked comparison
EURAMET.M.P-K8
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Metrology area, Sub-field Mass and related quantities, Pressure
Description Pressure measurements (gauge and absolute mode)
Time of measurements 2009 - 2012
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2016, 53, Tech. Suppl., 07017
Measurand Effective area of a piston-cylinder unit: 10-3 m2
Parameters Pressure: 25 kPa to 200 kPa
Transfer device Piston-cylinder unit
Comparison type Key Comparison
Consultative Committee CCM (Consultative Committee for Mass and Related Quantities)
Conducted by EURAMET (European Association of National Metrology Institutes)
RMO Internal Identifier EURAMET Project No 1041
Comments Results published on 12 September 2016

EURAMET.M.P-K8 results are linked to those of CCM.P-K6 (Gauge pressure) and CCM.P-K2 (Absolute pressure)
Pilot institute METAS
Federal Institute of Metrology
Switzerland
Contact person C. Wüthrich

+41 (0) 31 32 33 423
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
METAS

Federal Institute of Metrology, Switzerland, EURAMET

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

CEM

Centro Español de Metrologia, Spain, EURAMET

CMI

Czech Metrology Institute, Czechia, EURAMET

EIM

Hellenic Institute of Metrology, Greece, EURAMET

FORCE

FORCE Technology, Denmark, EURAMET

IMBIH

Institute of Metrology of Bosnia and Herzegovina, Bosnia and Herzegovina, EURAMET

INM

National Institute of Metrology, Romania, EURAMET

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

IPQ

Instituto Portugues da Qualidade, Portugal, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

LNE

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

MCCAA-SMI

Malta Competition and Consumer Affairs Authority - Standards and Metrology Institute, Malta, EURAMET

MIKES

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

MIRS/IMT/LMT

MIRS/Institute of Metals and Technology/Laboratory of Pressure Metrology, Slovenia, EURAMET

NIS

National Institute for Standards, Egypt, AFRIMETS

NSAI NML

NSAI National Metrology Laboratory, Ireland, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

VSL

VSL, Netherlands, EURAMET

Comparison
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Results
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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 20 kPa

  • Key comparison CCM.P-K6

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

xR = 335.744 4 mm2
uR = 0.000 7 mm2
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:
Di = (xi - xR) and Ui = 2(ui2 + uR2)1/2, its expanded uncertainty (k = 2).
The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2:
Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2)1/2, its expanded uncertainty (k = 2).
  • Linking APMP.M.P-K6 to CCM.P-K6

PTB is the common participant to both key comparisons CCM.P-K6 and APMP.M.P-K6: its results are used to compute the linkage as explained in Sections 5.1 and 5.2 of the APMP.M.P-K6 Final Report.

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value are obtained for laboratories having participated in APMP.M.P-K6 only, as explained in Section 5.3 of the APMP.M.P-K6 Final Report. They are expressed in mm2.
Pair-wise degrees of equivalence among pairs of participants in APMP.M.P-K6 are obtained as explained in Section 5.4 of the APMP.M.P-K6 Final Report. They are expressed in relative terms.
  • Linking APMP.M.P-K6.1 to CCM.P-K6

The key comparison APMP.M.P-K6.1 is linked to the CCM.P-K6 key comparison through the APMP.M.P-K6 key comparison.
A*STAR is the common participant to both key comparisons APMP.M.P-K6 and APMP.M.P-K6.1: its results are used to compute the linkage as explained in paragraph 4.1 the APMP.M.P-K6.1 Final Report.

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value are obtained for laboratories having participated in APMP.M.P-K6.1 only, as explained in paragraph 4.2 of the APMP.M.P-K6.1 Final Report. They are expressed in mm2.
Pair-wise degrees of equivalence among pairs of participants in APMP.M.P-K6.1 are obtained as explained in paragraph 4.3 of the APMP.M.P-K6.1 Final Report. They are expressed in relative terms.
  • Linking EURAMET.M.P-K8 to CCM.P-K6

PTB and VSL provide the link between key comparisons CCM.P-K6 and EURAMET.M.P-K8 for the following nominal pressures:  25 kPa, 50 kPa, 75 kPa and 100 kPa.
The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The measurements of EURAMET.M.P-K8 at the nominal pressure 25 kPa are linked with the averaged value of the 20 kPa and 30 kPa measurements of the CCM comparison, and those at the nominal pressure 75 kPa are linked with the averaged value of the 70 kPa and 80 kPa measurements of the CCM comparison.

Therefore, the degrees of equivalence of the laboratories having participated in EURAMET.M.P-K8 for 25 kPa and 75 kPa are shown on a different graph from the ones for the participants in CCM.P-K6.

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CCM.P-K6 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 50 kPa

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

xR = 335.744 3 mm2
uR = 0.000 8 mm2
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:
Di = (xi - xR) and Ui = 2(ui2 + uR2)1/2, its expanded uncertainty (k = 2).
The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2:
Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2)1/2, its expanded uncertainty (k = 2).
  • Linking EURAMET.M.P-K8 to CCM.P-K6

PTB and VSL provide the link between key comparisons CCM.P-K6 and EURAMET.M.P-K8 for the following nominal pressures: 25 kPa, 50 kPa, 75 kPa and 100 kPa.
The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The measurements of EURAMET.M.P-K8 at the nominal pressure 25 kPa are linked with the averaged value of the 20 kPa and 30 kPa measurements of the CCM comparison, and those at the nominal pressure 75 kPa are linked with the averaged value of the 70 kPa and 80 kPa measurements of the CCM comparison.

Therefore, the degrees of equivalence of the laboratories having participated in EURAMET.M.P-K8 for 25 kPa and 75 kPa are shown on a different graph from the ones for the participants in CCM.P-K6.

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CCM.P-K6 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 70 kPa

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

xR = 335.744 3 mm2
uR = 0.000 8 mm2
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:
Di = (xi - xR) and Ui = 2(ui2 + uR2)1/2, its expanded uncertainty (k = 2).
The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2:
Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2)1/2, its expanded uncertainty (k = 2).
  • Linking EURAMET.M.P-K8 to CCM.P-K6

PTB and VSL provide the link between key comparisons CCM.P-K6 and EURAMET.M.P-K8 for the following nominal pressures: 25 kPa, 50 kPa, 75 kPa and 100 kPa.
The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The measurements of EURAMET.M.P-K8 at the nominal pressure 25 kPa are linked with the averaged value of the 20 kPa and 30 kPa measurements of the CCM comparison, and those at the nominal pressure 75 kPa are linked with the averaged value of the 70 kPa and 80 kPa measurements of the CCM comparison.

Therefore, the degrees of equivalence of the laboratories having participated in EURAMET.M.P-K8 for 25 kPa and 75 kPa are shown on a different graph from the ones for the participants in CCM.P-K6.

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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p ~ 100 kPa

  • Key comparison CCM.P-K6

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

xR = 335.744 5 mm2
uR = 0.000 9 mm2
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:
Di = (xi - xR) and Ui = 2(ui2 + uR2)1/2, its expanded uncertainty (k = 2).
The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2:
Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2)1/2, its expanded uncertainty (k = 2).
  • Linking APMP.M.P-K6 to CCM.P-K6

PTB is the common participant to both key comparisons CCM.P-K6 and APMP.M.P-K6: its results are used to compute the linkage as explained in Sections 5.1 and 5.2 of the APMP.M.P-K6 Final Report.

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value are obtained for laboratories having participated in APMP.M.P-K6 only, as explained in Section 5.3 of the APMP.M.P-K6 Final Report. They are expressed in mm2.
Pair-wise degrees of equivalence among pairs of participants in APMP.M.P-K6 are obtained as explained in Section 5.4 of the APMP.M.P-K6 Final Report. They are expressed in relative terms.
  • Linking APMP.M.P-K6.1 to CCM.P-K6

The key comparison APMP.M.P-K6.1 is linked to the CCM.P-K6 key comparison through the APMP.M.P-K6 key comparison.
A*STAR is the common participant to both key comparisons APMP.M.P-K6 and APMP.M.P-K6.1: its results are used to compute the linkage as explained in paragraph 4.1 the APMP.M.P-K6.1 Final Report.

Degrees of equivalence relative to the CCM.P-K6 key comparison reference value are obtained for laboratories having participated in APMP.M.P-K6.1 only, as explained in paragraph 4.2 of the APMP.M.P-K6.1 Final Report. They are expressed in mm2.
Pair-wise degrees of equivalence among pairs of participants in APMP.M.P-K6.1 are obtained as explained in paragraph 4.3 of the APMP.M.P-K6.1 Final Report. They are expressed in relative terms.
  • Linking EURAMET.M.P-K8 to CCM.P-K6

PTB and VSL provide the link between key comparisons CCM.P-K6 and EURAMET.M.P-K8 for the following nominal pressures: 25 kPa, 50 kPa, 75 kPa and 100 kPa.
The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The measurements of EURAMET.M.P-K8 at the nominal pressure 25 kPa are linked with the averaged value of the 20 kPa and 30 kPa measurements of the CCM comparison, and those at the nominal pressure 75 kPa are linked with the averaged value of the 70 kPa and 80 kPa measurements of the CCM comparison.

Therefore, the degrees of equivalence of the laboratories having participated in EURAMET.M.P-K8 for 25 kPa and 75 kPa are shown on a different graph from the ones for the participants in CCM.P-K6.

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CCM.P-K2 and EURAMET.M.P-K8

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       20 kPa

 

CCM.P-K2

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.


                                                xR = 335.744 8 mm2
                                                uR = 0.001 7 mm2

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:

Di = (xi - xR) and Ui = 2(ui2 + uR2 + uT2)1/2, its expanded uncertainty (k = 2). uT is the uncertainty due to the instability of the transfer standard: uT = 0.002 5 mm2 (see page 15 of the Final Report).

The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2: Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2 + 2uT2)1/2, its expanded uncertainty (k = 2). Effects of correlation should be taken into consideration.

 

Linking EURAMET.M.P-K8 to CCM.P-K2

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       50 kPa

 

CCM.P-K2

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

                                                xR = 335.744 0 mm2
                                                uR = 0.000 8 mm2

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:

Di = (xi - xR) and Ui = 2(ui2 + uR2 + uT2)1/2, its expanded uncertainty (k = 2). uT is the uncertainty due to the instability of the transfer standard: uT = 0.002 5 mm2 (see page 15 of the Final Report).

The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2: Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2 + 2uT2)1/2, its expanded uncertainty (k = 2). Effects of correlation should be taken into consideration.

 

Linking EURAMET.M.P-K8 to CCM.P-K2

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

 

Linking APMP.M.P-K9 to CCM.P-K2

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       70 kPa

 

CCM.P-K2

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

                                                xR = 335.745 3 mm2
                                                uR = 0.000 5 mm2

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:

Di = (xi - xR) and Ui = 2(ui2 + uR2 + uT2)1/2, its expanded uncertainty (k = 2). uT is the uncertainty due to the instability of the transfer standard: uT = 0.002 5 mm2 (see page 15 of the Final Report).

The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2: Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2 + 2uT2)1/2, its expanded uncertainty (k = 2). Effects of correlation should be taken into consideration.

 

Linking EURAMET.M.P-K8 to CCM.P-K2

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

 

Linking APMP.M.P-K9 to CCM.P-K2

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       100 kPa

 

CCM.P-K2

The key comparison reference value, xR, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value, uR, is calculated by the formula uR = 1.858 MAD / (n - 1)1/2, where MAD is the median of absolute deviations from the median, and n is the number of participants contributing to the reference value.

                                                xR = 335.745 1 mm2
                                                uR = 0.000 7 mm2

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms expressed in mm2:

Di = (xi - xR) and Ui = 2(ui2 + uR2 + uT2)1/2, its expanded uncertainty (k = 2). uT is the uncertainty due to the instability of the transfer standard: uT = 0.002 5 mm2 (see page 15 of the Final Report).

The degree of equivalence between two laboratories i and j is given by a pair of terms expressed in mm2: Dij = Di - Dj = (xi - xj) and Uij = 2(ui2 + uj2 + 2uT2)1/2, its expanded uncertainty (k = 2). Effects of correlation should be taken into consideration.

 

Linking EURAMET.M.P-K8 to CCM.P-K2

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

 

Linking APMP.M.P-K9 to CCM.P-K2

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

Comparison
Comparison close
Results
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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 20 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 VSL

335.745 4

16

Aug-Sep 1998
 METAS

335.718 3

74

Nov-Dec 1998
 PTB 335.744 4 5.6 Feb-Mar 1999
 NIST 335.743 3 3.1 Sep-Oct 1999
 NIM

335.746 2

4.3

Nov-Dec 1999
 NPL 335.743 9 6.8 Aug-Sep 2000
 NRC 335.744 6 3.4 Jul-Sep 2001

  • Key comparison APMP.M.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 21.4 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 NPLI

335.737 3

15.80

Oct 1998
 KRISS

335.742 1

11.10

Apr 1999
 NMIA 335.749 7 12.60 Feb 2001
 NMIJ 335.738 8 8.80 Sep 1999
 PTB

335.737 6

6.40

Mar 2001
 MSL 335.749 3 11.80 May 1999
 A*STAR 335.737 5 19.20 Nov 1998
 NML-SIRIM

335.744 8

11.40

Jan 1999
 SCL

335.747 7

18.00

Jun 1999
 NMISA

335.740 7

14.60

Oct 1999
  • Key comparison APMP.M.P-K6.1

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.75 mm2
NOMINAL PRESSURE : p = 21.4 kPa

xi : result obtained from the mean of measurements by laboratory i
ULabi : relative expanded uncertainty (k =2) of xi

 Lab i xi
/ mm2		 ULabi
/ 10-6		 Date of measurement
 CMS/ITRI

335.623 5

30.2

Apr 03 - Apr 04
 A*STAR

335.633 9

22.0

Apr 03 - Apr 04
 NIMT 335.635 1 18.6 Apr 03 - Apr 04

 

  • Key comparison EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly determined in gauge pressure mode
NOMINAL VALUE : 980 mm2
NOMINAL PRESSURE : p = 25 kPa

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K8 are given in Table 7 on page 26 of the EURAMET.M.P-K8 Final Report.

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CCM.P-K6 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 50 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 VSL

335.745 5

16

Aug-Sep 1998
 METAS

335.727 6

39

Nov-Dec 1998
 PTB 335.744 8 4.2 Feb-Mar 1999
 NIST 335.743 0 3.1 Sep-Oct 1999
 NIM

335.744 3

4.2

Nov-Dec 1999
 NPL 335.744 3 3.0 Aug-Sep 2000
 NRC 335.743 3 2.9 Jul-Sep 2001

  • Key comparison EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly determined in gauge pressure mode
NOMINAL VALUE : 980 mm2
NOMINAL PRESSURE : p = 50 kPa

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K8 are given in Table 7 on page 26 of the EURAMET.M.P-K8 Final Report.

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CCM.P-K6 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 70 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 VSL

335.745 3

16

Aug-Sep 1998

 METAS

335.728 5

26

Nov-Dec 1998

 PTB 335.745 3 5.0 Feb-Mar 1999
 NIST 335.742 9 3.1 Sep-Oct 1999
 NIM

335.745 2

4.2

Nov-Dec 1999

 NPL 335.744 3 2.3 Aug-Sep 2000
 NRC 335.743 3 2.8 Jul-Sep 2001

  • Key comparison EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly determined in gauge pressure mode
NOMINAL VALUE : 980 mm2
NOMINAL PRESSURE : p = 75 kPa

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K8 are given in Table 7 on page 26 of the EURAMET.M.P-K8 Final Report.

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CCM.P-K6, APMP.M.P-K6, APMP.M.P-K6.1 and EURAMET.M.P-K8

  • Key comparison CCM.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 100 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 VSL

335.745 0

16

Aug-Sep 1998

 METAS

335.730 4

24

Nov-Dec 1998

 PTB 335.745 3 3.8 Feb-Mar 1999
 NIST 335.742 9 3.0 Sep-Oct 1999
 NIM

335.745 7

4.1

Nov-Dec 1999

 NPL 335.744 5 1.8 Aug-Sep 2000
 NRC 335.743 1 2.7 Jul-Sep 2001

  • Key comparison APMP.M.P-K6

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.7 mm2
NOMINAL PRESSURE : p = 101.2 kPa

xi : result obtained from the mean of measurements by laboratory i
ui : combined standard uncertainty of xi

 Lab i xi
/ mm2		 ui / xi
/ 10-6		 Date of measurement
 NPLI

335.737 7

15.80

Oct 1998
 KRISS

335.739 7

11.10

Apr 1999
 NMIA 335.741 0 12.60 Feb 2001
 NMIJ 335.737 8 8.80 Sep 1999
 PTB

335.739 7

5.90

Mar 2001
 MSL 335.741 0 11.70 May 1999
 A*STAR 335.734 0 19.10 Nov 1998
 NML-SIRIM

335.742 0

11.40

Jan 1999
 SCL

335.742 0

17.60

Jun 1999
 NMISA

335.732 0

14.60

Oct 1999
  • Key comparison APMP.M.P-K6.1

MEASURAND : Effective area of a piston-cylinder assembly
NOMINAL VALUE : 335.75 mm2
NOMINAL PRESSURE : p = 101.4 kPa

xi : result obtained from the mean of measurements by laboratory i
ULabi : relative expanded uncertainty (k =2) of xi

 Lab i xi
/ mm2		 ULabi
/ 10-6		 Date of measurement
 CMS/ITRI

335.624 4

30.0

Apr 03 - Apr 04
 A*STAR

335.632 2

21.2

Apr 03 - Apr 04
 NIMT 335.636 7 17.8 Apr 03 - Apr 04
  • Key comparison EURAMET.M.P-K8

MEASURAND : Effective area of a piston-cylinder assembly determined in gauge pressure mode
NOMINAL VALUE : 980 mm2
NOMINAL PRESSURE : p = 100 kPa

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K8 are given in Table 7 on page 26 of the EURAMET.M.P-K8 Final Report.

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CCM.P-K2 and EURAMET.M.P-K8

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       20 kPa

 

xi   results obtained by laboratory i, Labi

ui   combined standard uncertainty of xi

 

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       50 kPa

 

xi   results obtained by laboratory i, Labi

ui   combined standard uncertainty of xi

 

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       70 kPa

 

xi   results obtained by laboratory i, Labi

ui   combined standard uncertainty of xi

 

 

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CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9

MEASURAND                     Effective area of a piston-cylinder assembly

NOMINAL VALUE              335.7 mm2

NOMINAL PRESSURE       100 kPa

 

xi   results obtained by laboratory i, Labi

ui   combined standard uncertainty of xi