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Comparison
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Results
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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 3 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a
Blue triangles : participants in EURAMET.M.P-K4.2010

Note: Information not apparent on the graph
- DCSIRO-NML = 0.30 Pa and UCSIRO-NML = 0.05 Pa,
- UOMH = 0.23 Pa

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 10 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a
Blue triangles : participants in EURAMET.M.P-K4.2010

Note: Information not apparent on the graph
- DCSIRO-NML = 0.57 Pa and UCSIRO-NML = 0.10 Pa,
- DOMH = 0.40 Pa and UOMH = 0.92 Pa

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 30 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a
Blue triangles : participants in EURAMET.M.P-K4.2010

Note: Information not apparent on the graph
- DCSIRO-NML = 0.91 Pa and UCSIRO-NML = 0.15 Pa,
- DOMH = 2.0 Pa and UOMH = 3.2 Pa

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 100 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a only

Note: Information not apparent on the graph
DOMH = 2.5 Pa and UOMH = 3.1 Pa

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 300 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a only

CNR-IMGC: two different methods

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 1000 Pa

Degrees of equivalence Di and expanded uncertainty Ui (95% level of confidence) expressed in Pa

Red diamonds : participants in CCM.P-K4
Pink squares : participants in EUROMET.M.P-K1.a only

CNR-IMGC: two different methods

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CCM.P-K4, EUROMET.M.P-K1.a, EUROMET.M.P-K1.b, SIM-EUROMET.M.P-BK3 and EURAMET.M.P-K15.1

 

MEASURAND       Pressure

NOMINAL VALUE    1 Pa

 

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
Results
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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 3 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.3010.052
CNR-IMGC0.0040.016
NIST0.00080.0037
NPLI-0.00710.0049
NPL0.0010.016
PTB-0.00130.0075
BNM-LNE-0.0170.013
MIKES0.0410.052
SP0.00560.068
CEM0.00200.024
OMH-0.0930.23
UME0.0180.018
NMi-VSL-0.0330.036
CMI0.0080.026
INRIM0.0100.026
LNE0.0030.026
MIKES0.0220.072

In pink: participants in EUROMET.M.P-K1.a.
In blue: participants in EURAMET.M.P-K4.2010.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a and EURAMET.M.P-K4.2010.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 10 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.570.10
CNR-IMGC0.0150.053
KRISS0.0030.023
NIST0.0000.013
NPLI-0.0180.016
NPL0.0030.053
PTB-0.0050.025
BNM-LNE-0.0400.041
MIKES0.0430.082
SP-0.00800.13
CEM-0.00720.079
OMH-0.400.92
UME0.0510.058
NMi-VSL0.00580.037
CMI-0.0100.028
INRIM-0.0030.028
LNE-0.0100.028
MIKES0.0010.073

In pink: participants in EUROMET.M.P-K1.a.
In blue: participants in EURAMET.M.P-K4.2010.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a and EURAMET.M.P-K4.2010.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 30 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.910.15
CNR-IMGC0.060.16
KRISS0.0220.035
NIST-0.0100.029
NPLI-0.0470.041
NPL-0.030.10
PTB0.0020.062
BNM-LNE-0.0780.11
MIKES0.0500.20
SP-0.0550.32
CEM-0.0370.20
OMH2.03.2
UME0.110.14
NMi-VSL0.0640.042
CMI-0.0160.028
INRIM-0.0040.028
LNE-0.0140.028
MIKES-0.0070.074

In pink: participants in EUROMET.M.P-K1.a.
In blue: participants in EURAMET.M.P-K4.2010.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a and EURAMET.M.P-K4.2010.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 100 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.830.20
CNR-IMGC0.180.11
KRISS0.0360.081
NIST-0.0090.074
NPLI-0.130.11
NPL-0.080.30
PTB0.000.19
BNM-LNE-0.170.38
MIKES0.0770.70
SP-0.150.96
CEM-0.150.63
OMH2.53.1
UME0.320.47
NMi-VSL0.0960.069
CNR-IMGC-0.0800.40

In pink: participants in EUROMET.M.P-K1.a only.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 300 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.570.34
CNR-IMGC0.130.24
KRISS0.010.22
NIST-0.010.22
NPLI-0.240.33
NPL-0.200.90
PTB-0.080.56
BNM-LNE-0.300.57
MIKES-0.101.3
SP-0.301.3
CEM-0.301.3
CNR-IMGC0.130.61

In pink: participants in EUROMET.M.P-K1.a only.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 1000 Pa

Lab i  
 DiUi
 / Pa/ Pa
CSIRO-NML0.330.78
CNR-IMGC0.180.74
KRISS0.060.74
NIST0.030.73
NPLI-0.91.4
NPL0.73.0
PTB-0.31.9
BNM-LNE-0.381.9
MIKES0.324.5
SP0.512.3
CEM-0.384.2
CNR-IMGC0.382.0

In pink: participants in EUROMET.M.P-K1.a only.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.

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

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, EUROMET.M.P-K1.b, SIM-EUROMET.M.P-BK3 and EURAMET.M.P-K15.1

 

MEASURAND       Pressure

NOMINAL VALUE    1 Pa

 

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
CC comparison
Linked comparison
EUROMET.M.P-K1.b
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Metrology area, Sub-field Mass and related quantities, Pressure
Description Pressure measurements in Nitrogen (absolute mode)
Time of measurements 2000 - 2002
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2005, 42, Tech. Suppl., 07001
Measurand Pressure: 0.3 mPa to 0.9 Pa
Transfer device Spinning rotor gauges
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 EUROMET Project No 442, phase B
Comments The CCM.P-K4 results were published on 08 February 2002, then completed with EUROMET.M.P-K1.b and SIM-EUROMET.M.P-BK3 results at nominal pressure close to 1 Pa, on 15 November 2004.
Additional results from EUROMET.M.P-K1.a were published on 25 March 2005 for the pressure range 1 Pa to 1000 Pa, and from EURAMET.M.P-K4.2010 on 15 April 2014 for the nominal pressures 1 Pa, 3 Pa and 30 Pa.
Pressure measurements in gas (absolute mode)
Pilot institute PTB
Physikalisch-Technische Bundesanstalt
Germany
Contact person K. Jousten

+49 (0) 30 34 81 7262
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

CEM

Centro Español de Metrologia, Spain, EURAMET

NPL

National Physical Laboratory, United Kingdom, EURAMET

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

Comparison
Comparison close
Results
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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 3 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means (outliers excluded). A correction is applied to set pR numerically equal to the nominal pressure (see CCM.P-K4 Final Report, page 41).
The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 3 Pa and uR = 0.0019 Pa
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process is presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
  • Linking EURAMET.M.P-K4.2010 to CCM.P-K4

PTB provides the link between key comparisons CCM.P-K4 and EURAMET.M.P-K4.2010 for nominal pressures 3 Pa, 10 Pa, and 30 Pa.
The linkage process is described in Section 11 of the EURAMET.M.P-K4.2010 Final Report.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 10 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means (outliers excluded). A correction is applied to set pR numerically equal to the nominal pressure (see CCM.P-K4 Final Report, page 41). The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 10 Pa and uR = 0.0066 Pa
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process in presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
  • Linking EURAMET.M.P-K4.2010 to CCM.P-K4

PTB provides the link between key comparisons CCM.P-K4 and EURAMET.M.P-K4.2010 for nominal pressures 3 Pa, 10 Pa, and 30 Pa.
The linkage process is described in Section 11 of the EURAMET.M.P-K4.2010 Final Report.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL VALUE : 30 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means (outliers excluded). A correction is applied to set pR numerically equal to the nominal pressure (see CCM.P-K4 Final Report, page 41). The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 30 Pa and uR = 0.015 Pa
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process in presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.
No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
  • Linking EURAMET.M.P-K4.2010 to CCM.P-K4

PTB provides the link between key comparisons CCM.P-K4 and EURAMET.M.P-K4.2010 for nominal pressures 3 Pa, 10 Pa, and 30 Pa.
The linkage process is described in Section 11 of the EURAMET.M.P-K4.2010 Final Report.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 100 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means (outliers excluded).
A correction is applied to set pR numerically equal to the nominal pressure
(see CCM.P-K4 Final Report, page 41).
The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 100 Pa and uR = 0.038 Pa

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.

The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process in presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.

No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 300 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means.
A correction is applied to set pR numerically equal to the nominal pressure
(see CCM.P-K4 Final Report, page 41).
The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 300 Pa and uR = 0.11 Pa

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.

The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process in presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.

No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL VALUE : 1000 Pa

  • Key comparison CCM.P-K4

The key comparison reference value, pR, is obtained from an unweighted mean of the measurement method means.
A correction is applied to set pR numerically equal to the nominal pressure
(see CCM.P-K4 Final Report, page 41).
The combined standard uncertainty of pR is uR (see CCM.P-K4 Final Report, page 42).
pR = 1000 Pa and uR = 0.37 Pa

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:
Di = (pi - pR) and Ui, its expanded uncertainty at a 95% level of confidence, both expressed in Pa.

The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (pi - pj) and Uij, its expanded uncertainty at 95% level of confidence, both expressed in Pa.
  • Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 for 7 pressure nominal values in the range 1 Pa to 1000 Pa, through the common participation of three laboratories: CNR-IMGC, PTB, and NPL.
The CNR-IMGC, however, does not participate in the linking process in the pressure range 100 Pa to 1000 Pa, because it did not use a Static Expansion System for that range of measurements in CCM.P-K4.
The detailed calculation used in the linking process in presented on pages 20 and 21 of the EUROMET.M.P-K1.a Final report.

The degrees of equivalence of laboratories having participated in EUROMET.M.P-K1.a only (plus those of CNR-IMGC in the range 100 Pa to 1000 Pa) relative to the CCM.P-K4 key comparison reference values are obtained from the linking process and are given in table 11 on page 22 of the EUROMET.M.P-K1.a Final Report.

No pair-wise degrees of equivalence are deduced from the measurements carried out in the framework of key comparison EUROMET.M.P-K1.a.
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CCM.P-K4, EUROMET.M.P-K1.a, EUROMET.M.P-K1.b, SIM-EUROMET.M.P-BK3 and EURAMET.M.P-K15.1

 

MEASURAND       Pressure

NOMINAL VALUE    1 Pa

 

CCM.P-K4

The key comparison reference value, xR, is obtained from an unweighted mean of the measurement method means (outliers excluded). A correction is applied to set xR numerically equal to the nominal pressure (see CCM.P-K4 Final Report, page 41). The combined standard uncertainty of xR is uR (see CCM.P-K4 Final Report, page 42), where
 

xR = 1 Pa    and    uR = 0.0008 Pa

 

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms:

Di = (xi - xR) and Ui, its expanded uncertainty at a 95% level of confidence (k = 2), both expressed in Pa

 

 

Linking EUROMET.M.P-K1.a to CCM.P-K4

The results of EUROMET.M.P-K1.a are linked to those of CCM.P-K4 via CNR-IMGC, PTB, and NPL; who participated in both vcomparisons.

 

Linking EUROMET.M.P-K1.b to CCM.P-K4

The results of EUROMET.M.P-K1.b are linked to those of CCM.P-K4 via CNR-IMGC, PTB, and NPL; who participated in both vcomparisons.

 

Linking SIM-EUROMET.M.P-BK3 to CCM.P-K4

The results of SIM-EUROMET.M.P-BK3 are linked to those of CCM.P-K4 via PTB / EUROMET.M.P-K1.b who participated in these comparisons.

 

Linking EURAMET.M.P-K15.1 to CCM.P-K4

The results of EURAMET.M.P-K15.1 at 1 Pas are linked to those of CCM.P-K4 via PTB who participated in both comparisons

Comparison
Comparison close
Results
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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL PRESSURE : 3 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

  • Key comparison EURAMET.M.P-K4.2010

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K4.2010 are given in Table 10.7a on page 23 of the EURAMET.M.P-K4.2010 Final Report.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL PRESSURE : 10 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

  • Key comparison EURAMET.M.P-K4.2010

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K4.2010 are given in Table 10.7a on page 23 of the EURAMET.M.P-K4.2010 Final Report.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, and EURAMET.M.P-K4.2010

MEASURAND : Pressure
NOMINAL PRESSURE : 30 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

 

  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

  • Key comparison EURAMET.M.P-K4.2010

The laboratory individual measurements of the participants in the key comparison EURAMET.M.P-K4.2010 are given in Table 10.7a on page 23 of the EURAMET.M.P-K4.2010 Final Report.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL PRESSURE : 100 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

 

 Lab i pi
/ Pa		 ui
/ Pa

Measurement method

Date of
measurement
         
 CSIRO-NML 100.831 0.093

Liquid-Column Manometer

 24 Feb to 03 Mar 1999
 CNR-IMGC 100.176 0.051

Liquid-Column Manometer

 19 Jan to 08 Feb 1999
 KRISS 100.036 0.021

Liquid-Column Manometer

 15 Jun to 22 Jun 1999
 NIST 99.9909 0.0053

Liquid-Column Manometer(s)

 17 Mar to 03 Apr and 08 Jul to 24 Jul 1998, 23 Apr to 06 May and 23 Aug to 10 Sep 1999
 NPLI 99.874 0.055

Static Expansion System

 01 Jan to 14 Jan 1999
 NPL 99.92 0.18

Static Expansion System

 17 Nov to 25 Nov 1998
 PTB 100.00 0.11

Static Expansion System

 28 May to 04 Jun 1998
  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL PRESSURE : 300 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

 

 Lab i pi
/ Pa		 ui
/ Pa

Measurement method

Date of
measurement
         
 CSIRO-NML 300.57 0.16

Liquid-Column Manometer

 24 Feb to 03 Mar 1999
 CNR-IMGC 300.132 0.060

Liquid-Column Manometer

 19 Jan to 08 Feb 1999
 KRISS 300.010 0.023

Liquid-Column Manometer

 15 Jun to 22 Jun 1999
 NIST 299.9871 0.0054

Liquid-Column Manometer(s)

 17 Mar to 03 Apr and 08 Jul to 24 Jul 1998, 23 Apr to 06 May and 23 Aug to 10 Sep 1999
 NPLI 299.76 0.16

Static Expansion System

 01 Jan to 14 Jan 1999
 NPL 299.80 0.54

Static Expansion System

 17 Nov to 25 Nov 1998
 PTB 299.92 0.32

Static Expansion System

 28 May to 04 Jun 1998
  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4 and EUROMET.M.P-K1.a

MEASURAND : Pressure
NOMINAL PRESSURE : 1000 Pa

  • Key comparison CCM.P-K4

pi : corrected mean gauge reading obtained by laboratory i
ui : combined standard uncertainty of pi
Further information on pi and ui may be found respectively on page 15 and page 22 of CCM.P-K4 Final Report.

 

 Lab i pi
/ Pa		 ui
/ Pa

Measurement method

Date of
measurement
         
 CSIRO-NML 1000.33 0.16

Liquid-Column Manometer

 24 Feb to 03 Mar 1999
 CNR-IMGC 1000.178 0.061

Liquid-Column Manometer

 19 Jan to 08 Feb 1999
 KRISS 1000.056 0.055

Liquid-Column Manometer

 15 Jun to 22 Jun 1999
 NIST 1000.0308 0.0059

Liquid-Column Manometer(s)

 17 Mar to 03 Apr and 08 Jul to 24 Jul 1998, 23 Apr to 06 May and 23 Aug to 10 Sep 1999
 NPLI 999.12 0.74

Static Expansion System

 01 Jan to 14 Jan 1999
 NPL 1000.7 1.8

Static Expansion System

 17 Nov to 25 Nov 1998
 PTB 999.7 1.1

Static Expansion System

 28 May to 04 Jun 1998
  • Key comparison EUROMET.M.P-K1.a

The laboratory individual measurements of the participants in EUROMET.M.P-K1.a are given in Table 7 and 8 on pages 17, 18, and 19 of the EUROMET.M.P-K1.a Final Report.
All measurements used a Static Expansion System and were carried out between September 1998 and April 2004.

Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.

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CCM.P-K4, EUROMET.M.P-K1.a, EUROMET.M.P-K1.b, SIM-EUROMET.M.P-BK3 and EURAMET.M.P-K15.1

 

MEASURAND       Pressure

NOMINAL VALUE    1 Pa

 

The initial measurement results are available in the Final Reports.