Comparison
Comparison close

CCM.M-K2, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, EURAMET.M.M-K2.3, and EURAMET.M.M-K2.5

MEASURAND : Mass
NOMINAL VALUE : 10 kg

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg: Click here to view the Graph of equivalence

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 500 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg: Click here to view the Graph of equivalence

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 20 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg: Click here to view the Graph of equivalence

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 2 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg: Click here to view the Graph of equivalence

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 100 mg

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg: Click here to view the Graph of equivalence

Comparison
Comparison close

CCM.M-K2, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, EURAMET.M.M-K2.3, and EURAMET.M.M-K2.5

MEASURAND : Mass
NOMINAL VALUE : 10 kg

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg

In dark blue: laboratories participant in CCM.M-K2
In green: laboratories participant in EUROMET.M.M-K2
In orange: laboratories participant in EUROMET.M.M-K2.1
In pink: laboratories participant in APMP.M.M-K2
In purple: laboratory participant in EURAMET.M.M-K2.3
In blue: laboratories participant in EURAMET.M.M-K2.5

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

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 500 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg

In dark blue: laboratories participant in CCM.M-K2
In blue: laboratories participant in APMP.M.M-K6
In green: laboratories participant in EUROMET.M.M-K2
In orange: laboratories participant in EUROMET.M.M-K2.1
In pink: laboratories participant in APMP.M.M-K2
In braun: laboratory participant in APMP.M.M-K2.1
In grey: laboratories participant in EURAMET.M.M-K2.2
In purple: laboratory participant in EURAMET.M.M-K2.3
In black: laboratory participant in EURAMET.M.M-K2.6

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

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 20 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg

In dark blue: laboratories participant in CCM.M-K2
In blue: laboratories participant in APMP.M.M-K6
In green: laboratories participant in EUROMET.M.M-K2
In orange: laboratories participant in EUROMET.M.M-K2.1
In pink: laboratories participant in APMP.M.M-K2
In braun: laboratory participant in APMP.M.M-K2.1
In grey: laboratories participant in EURAMET.M.M-K2.2
In purple: laboratory participant in EURAMET.M.M-K2.3
In black: laboratory participant in EURAMET.M.M-K2.6

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

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 2 g

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg

In dark blue: laboratories participant in CCM.M-K2
In blue: laboratories participant in APMP.M.M-K6
In green: laboratories participant in EUROMET.M.M-K2
In orange: laboratories participant in EUROMET.M.M-K2.1
In pink: laboratories participant in APMP.M.M-K2
In braun: laboratory participant in APMP.M.M-K2.1
In grey: laboratories participant in EURAMET.M.M-K2.2
In black: participant in EURAMET.M.M-K2.6

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

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 100 mg

Degrees of equivalence: Di and expanded uncertainty Ui (at a 95 % level of confidence) expressed in mg

In dark blue: laboratories participant in CCM.M-K2
In blue: laboratories participant in APMP.M.M-K6
In green: laboratories participant in EUROMET.M.M-K2
In orange: laboratories participant in EUROMET.M.M-K2.1
In pink: laboratories participant in APMP.M.M-K2
In braun: laboratory participant in APMP.M.M-K2.1
In grey: laboratories participant in EURAMET.M.M-K2.2
In black: participant in EURAMET.M.M-K2.6

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

EUROMET.M.M-K2.1
Metrology area, Sub-field Mass and related quantities, Mass Standards
Description Comparison of mass standards
Time of measurements 2005 - 2008
Status Approved for equivalence
Final Reports of the comparisons
Measurand Mass: 100 mg, 2 g, 20 g, 500 g and 10 kg
Transfer device Stainless steel standards
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 786
Comments

This comparison is a follow-up of comparison EUROMET.M.M-K2

Results published on 11 September 2009

Comparison of multiples and submultiples of the kilogram

APMP.M.M-K6, APMP.M.M-K2.1, EURAMET.M.M-K2.2, EURAMET.M.M-K2.3 and EURAMET.M.M-K2.6 results are linked to those of CCM.M-K2 for nominal values 500 g, 20 g, 2 g, and 100 mg.
APMP.M.M-K2, EUROMET.M.M-K2, EUROMET.M.M-K2.1 and EURAMET.M.M-K2.3 results are linked to those of CCM.M-K2 for nominal values 500 g, 20 g, 2 g, 100 mg and 10 kg.
EURAMET.M.M-K2.5 results are linked to those of CCM.M-K2 for the nominal value of 10 kg.

Pilot institute NPL
National Physical Laboratory
United Kingdom
Contact person M. Perkin

+44 (0) 20 8943 6846
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
DMDM

Directorate of Measures and Precious Metals, Serbia, EURAMET

DZM

State Office for Metrology; now: Croatian Metrology Institute, HMI, Croatia, EURAMET

EIM

Hellenic Institute of Metrology, Greece, EURAMET

INPL

National Physical Laboratory of Israel, Israel, N/A

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

JV

Justervesenet, Norway, EURAMET

LNMC

Latvian National Metrology Centre; now: LNMC Metrology Bureau (LATMB), Latvia, EURAMET

METROSERT

AS Metrosert, Estonia, EURAMET

MSA

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

NIS

National Institute for Standards, Egypt, AFRIMETS

UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

VSL

VSL, Netherlands, EURAMET

Comparison
Comparison close

CCM.M-K2, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, EURAMET.M.M-K2.3, and EURAMET.M.M-K2.5

MEASURAND : Mass
NOMINAL VALUE : 10 kg

  • Key comparison CCM.M-K2

The key comparison reference value, xR, is evaluated as the median of the xi values. Its standard uncertainty is denoted uR, see Appendix 1 of the CCM.M-K2 Final Report.

xR = 0.03 mg and uR = 0.12 mg

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), both expressed in mg. Detailed information on the evaluation of Ui may be found in Section 5 of the CCM.M-K2 Final Report.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. Detailed information on the evaluation of Uij may be found in Section 6 of the CCM.M-K2 Final Report
.
  • Linking EUROMET.M.M-K2 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2 Final Report.

he degree of equivalence of each laboratory i participant in EUROMET.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2 are given in Table 6 to 10 of the EUROMET.M.M-K2 Final Report.
  • Linking EUROMET.M.M-K2.1 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2.1 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2.1 are given in Table 7 to 11 of the EUROMET.M.M-K2.1 Final Report.
  • Linking APMP.M.M-K2 to CCM.M-K2

The linking process is explained in section 7.3 of the APMP.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 7.3 of the APMP.M.M-K2 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking EURAMET.M.M-K2.3 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using EIM results in both comparisons (see Section 7 of the EURAMET.M.M-K2.3 Final Report).

The pair-wise degrees of equivalence inside EURAMET.M.M-K2.3 are given in Table 5 of the EURAMET.M.M-K2.3 Final Report.
  • Linking EURAMET.M.M-K2.5 to CCM.M-K2

The link is made through the results of the PTB having participated in both comparisons CCM.M-K2 and EURAMET.M.M-K2.5
(see page 6 of the EURAMET.M.M-K2.5 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.5 participants have been computed.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 500 g

  • Key comparison CCM.M-K2

The key comparison reference value, xR, is evaluated as the median of the xi values. Its standard uncertainty is denoted uR, see Appendix 1 of the CCM.M-K2 Final Report.

xR = 0.005 mg and uR = 0.004 mg

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), both expressed in mg. Detailed information on the evaluation of Ui may be found in Section 5 of the CCM.M-K2 Final Report.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. Detailed information on the evaluation of Uij may be found in Section 6 of the CCM.M-K2 Final Report.
  • Linking APMP.M.M-K6 to CCM.M-K2

The APMP.M.M-K6 results were analyzed and linked to the CCM.M-K2 results using Generalised Least-Squares (sometimes known as Gauss-Markov) estimation (see Section 7 of the APMP.M.M-K6 Final Report).
This analysis directly combines the APMP comparison results with the CCM.M-K2 results of the linking laboratory, NMIA (CSIRO-NML at the time of the CCM.M-K2 key comparison), to estimate:

- the degree of equivalence of each laboratory participant in APMP.M.M-K6 with respect to the CCM.M-K2 key comparison reference value, Di and Ui, and
- the degrees of equivalence between two laboratories both participant in APMP.M.M-K6, Dij and Uij,
Ui and Uij being the expanded uncertainties (k = 2) of Di and Dij respectively.
The pair-wise degrees of equivalence inside APMP.M.M-K6 are given on pages 15 and 16 of the APMP.M.M-K6 Final Report.

Artefacts of nominal value 1 kg are also measured in the framework of key comparison APMP.M.M-K6. This is reported together with CCM.M-K1 results.

  • Linking EUROMET.M.M-K2 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2 are given in Table 6 to 10 of the EUROMET.M.M-K2 Final Report.
  • Linking EUROMET.M.M-K2.1 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2.1 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2.1 are given in Table 7 to 11 of the EUROMET.M.M-K2.1 Final Report.
  • Linking APMP.M.M-K2 to CCM.M-K2

The linking process is explained in section 7.3 of the APMP.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 7.3 of the APMP.M.M-K2 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking APMP.M.M-K2.1 to CCM.M-K2

The linking process is explained in section 6.2 of the APMP.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 6.2 of the APMP.M.M-K2.1 Final Report.
No pair-wise degrees of equivalence involving APMP.M.M-K2.1 participants have been computed.
  • Linking EURAMET.M.M-K2.2 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using BEV and EIM results in both comparisons (see Section 5 of the EURAMET.M.M-K2.2 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.2 participants have been computed.
  • Linking EURAMET.M.M-K2.3 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using EIM results in both comparisons (see Section 7 of the EURAMET.M.M-K2.3 Final Report).

The pair-wise degrees of equivalence inside EURAMET.M.M-K2.3 are given in Table 5 of the EURAMET.M.M-K2.3 Final Report.
  • Linking EURAMET.M.M-K2.6 to CCM.M-K2

The link is made through the results of NPL having participated in both comparisons (see Section 4 of the EURAMET.M.M-K2.6 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.6 participants have been computed.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 20 g

  • Key comparison CCM.M-K2

The key comparison reference value, xR, is evaluated as the median of the xi values. Its standard uncertainty is denoted uR, see Appendix 1 of the CCM.M-K2 Final Report.

xR = 0.0027 mg and uR = 0.0011 mg

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), both expressed in mg. Detailed information on the evaluation of Ui may be found in Section 5 of the CCM.M-K2 Final Report.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. Detailed information on the evaluation of Uij may be found in Section 6 of the CCM.M-K2 Final Report.
  • Linking APMP.M.M-K6 to CCM.M-K2

The APMP.M.M-K6 results were analyzed and linked to the CCM.M-K2 results using Generalised Least-Squares (sometimes known as Gauss-Markov) estimation (see Section 7 of the APMP.M.M-K6 Final Report).
This analysis directly combines the APMP comparison results with the CCM.M-K2 results of the linking laboratory, NMIA (CSIRO-NML at the time of the CCM.M-K2 key comparison), to estimate:

- the degree of equivalence of each laboratory participant in APMP.M.M-K6 with respect to the CCM.M-K2 key comparison reference value, Di and Ui, and
- the degrees of equivalence between two laboratories both participant in APMP.M.M-K6, Dij and Uij,
Ui and Uij being the expanded uncertainties (k = 2) of Di and Dij respectively.
The pair-wise degrees of equivalence inside APMP.M.M-K6 are given on pages 15 and 16 of the APMP.M.M-K6 Final Report.

Artefacts of nominal value 1 kg are also measured in the framework of key comparison APMP.M.M-K6. This is reported together with CCM.M-K1 results.

  • Linking EUROMET.M.M-K2 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2 are given in Table 6 to 10 of the EUROMET.M.M-K2 Final Report.
  • Linking EUROMET.M.M-K2.1 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2.1 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2.1 are given in Table 7 to 11 of the EUROMET.M.M-K2.1 Final Report.
  • Linking APMP.M.M-K2 to CCM.M-K2

The linking process is explained in section 7.3 of the APMP.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 7.3 of the APMP.M.M-K2 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking APMP.M.M-K2.1 to CCM.M-K2

The linking process is explained in section 6.2 of the APMP.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 6.2 of the APMP.M.M-K2.1 Final Report.
No pair-wise degrees of equivalence involving APMP.M.M-K2.1 participants have been computed.
  • Linking EURAMET.M.M-K2.2 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using BEV and EIM results in both comparisons (see Section 5 of the EURAMET.M.M-K2.2 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.2 participants have been computed.
  • Linking EURAMET.M.M-K2.3 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using EIM results in both comparisons (see Section 7 of the EURAMET.M.M-K2.3 Final Report).

The pair-wise degrees of equivalence inside EURAMET.M.M-K2.3 are given in Table 5 of the EURAMET.M.M-K2.3 Final Report.
  • Linking EURAMET.M.M-K2.6 to CCM.M-K2

The link is made through the results of NPL having participated in both comparisons (see Section 4 of the EURAMET.M.M-K2.6 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.6 participants have been computed.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 2 g

  • Key comparison CCM.M-K2

The key comparison reference value, xR, is evaluated as the median of the xi values. Its standard uncertainty is denoted uR, see Appendix 1 of the CCM.M-K2 Final Report.

xR = 0.0007 mg and uR = 0.0004 mg

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), both expressed in mg. Detailed information on the evaluation of Ui may be found in Section 5 of the CCM.M-K2 Final Report.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. Detailed information on the evaluation of Uij may be found in Section 6 of the CCM.M-K2 Final Report.
  • Linking APMP.M.M-K6 to CCM.M-K2

The APMP.M.M-K6 results were analyzed and linked to the CCM.M-K2 results using Generalised Least-Squares (sometimes known as Gauss-Markov) estimation (see Section 7 of the APMP.M.M-K6 Final Report).
This analysis directly combines the APMP comparison results with the CCM.M-K2 results of the linking laboratory, NMIA (CSIRO-NML at the time of the CCM.M-K2 key comparison), to estimate:

- the degree of equivalence of each laboratory participant in APMP.M.M-K6 with respect to the CCM.M-K2 key comparison reference value, Di and Ui, and
- the degrees of equivalence between two laboratories both participant in APMP.M.M-K6, Dij and Uij,
Ui and Uij being the expanded uncertainties (k = 2) of Di and Dij respectively.
The pair-wise degrees of equivalence inside APMP.M.M-K6 are given on pages 15 and 16 of the APMP.M.M-K6 Final Report.

Artefacts of nominal value 1 kg are also measured in the framework of key comparison APMP.M.M-K6. This is reported together with CCM.M-K1 results.

  • Linking EUROMET.M.M-K2 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2 are given in Table 6 to 10 of the EUROMET.M.M-K2 Final Report.
  • Linking EUROMET.M.M-K2.1 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2.1 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2.1 are given in Table 7 to 11 of the EUROMET.M.M-K2.1 Final Report.
  • Linking APMP.M.M-K2 to CCM.M-K2

The linking process is explained in section 7.3 of the APMP.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 7.3 of the APMP.M.M-K2 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking APMP.M.M-K2.1 to CCM.M-K2

The linking process is explained in section 6.2 of the APMP.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 6.2 of the APMP.M.M-K2.1 Final Report.
No pair-wise degrees of equivalence involving APMP.M.M-K2.1 participants have been computed.
  • Linking EURAMET.M.M-K2.2 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using BEV and EIM results in both comparisons (see Section 5 of the EURAMET.M.M-K2.2 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.2 participants have been computed.

  • Linking EURAMET.M.M-K2.6 to CCM.M-K2

The link is made through the results of NPL having participated in both comparisons (see Section 4 of the EURAMET.M.M-K2.6 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.6 participants have been computed.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 100 mg

  • Key comparison CCM.M-K2

The key comparison reference value, xR, is evaluated as the median of the xi values. Its standard uncertainty is denoted uR, see Appendix 1 of the CCM.M-K2 Final Report.

xR = -0.0004 mg and uR = 0.0002 mg

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), both expressed in mg. Detailed information on the evaluation of Ui may be found in Section 5 of the CCM.M-K2 Final Report.
The degree of equivalence between two laboratories is given by a pair of terms:
Dij = Di - Dj = (xi - xj) and Uij, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. Detailed information on the evaluation of Uij may be found in Section 6 of the CCM.M-K2 Final Report.
  • Linking APMP.M.M-K6 to CCM.M-K2

The APMP.M.M-K6 results were analyzed and linked to the CCM.M-K2 results using Generalised Least-Squares (sometimes known as Gauss-Markov) estimation (see Section 7 of the APMP.M.M-K6 Final Report).
This analysis directly combines the APMP comparison results with the CCM.M-K2 results of the linking laboratory, NMIA (CSIRO-NML at the time of the CCM.M-K2 key comparison), to estimate:

- the degree of equivalence of each laboratory participant in APMP.M.M-K6 with respect to the CCM.M-K2 key comparison reference value, Di and Ui, and
- the degrees of equivalence between two laboratories both participant in APMP.M.M-K6, Dij and Uij,
Ui and Uij being the expanded uncertainties (k = 2) of Di and Dij respectively.
The pair-wise degrees of equivalence inside APMP.M.M-K6 are given on pages 15 and 16 of the APMP.M.M-K6 Final Report.

Artefacts of nominal value 1 kg are also measured in the framework of key comparison APMP.M.M-K6. This is reported together with CCM.M-K1 results.

  • Linking EUROMET.M.M-K2 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2 are given in Table 6 to 10 of the EUROMET.M.M-K2 Final Report.
  • Linking EUROMET.M.M-K2.1 to CCM.M-K2

The linking process is explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in EUROMET.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (at a 95% level of confidence), both expressed in mg. These are computed as explained in Appendix A of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between any of the laboratories participating in EUROMET.M.M-K2.1 and those participating in CCM.M-K2 are not computed.
The pair-wise degrees of equivalence inside EUROMET.M.M-K2.1 are given in Table 7 to 11 of the EUROMET.M.M-K2.1 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking APMP.M.M-K2 to CCM.M-K2

The linking process is explained in section 7.3 of the APMP.M.M-K2 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 7.3 of the APMP.M.M-K2 Final Report.
The degrees of equivalence between two laboratories participating in APMP.M.M-K2 is given by a pair of terms both expressed in mg: Dij = Di - Dj, and its expanded uncertainty (k = 2) Uij.
The pair-wise degrees of equivalence between any of the laboratories participating in APMP.M.M-K2 and those participating in CCM.M-K2 are not computed.
  • Linking APMP.M.M-K2.1 to CCM.M-K2

The linking process is explained in section 6.2 of the APMP.M.M-K2.1 Final Report.

The degree of equivalence of each laboratory i participant in APMP.M.M-K2.1 with respect to the CCM.M-K2 key comparison reference value is given by a pair of terms: Di and Ui, its expanded uncertainty (k = 2), both expressed in mg. These are computed as explained in section 6.2 of the APMP.M.M-K2.1 Final Report.
No pair-wise degrees of equivalence involving APMP.M.M-K2.1 participants have been computed.
  • Linking EURAMET.M.M-K2.2 to CCM.M-K2

The link is made through the EUROMET.M.M-K2 key comparison using BEV and EIM results in both comparisons (see Section 5 of the EURAMET.M.M-K2.2 Final Report)

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.2 participants have been computed.
  • Linking EURAMET.M.M-K2.6 to CCM.M-K2

The link is made through the results of NPL having participated in both comparisons (see Section 4 of the EURAMET.M.M-K2.6 Final Report).

No pair-wise degrees of equivalence involving EURAMET.M.M-K2.6 participants have been computed.

Comparison
Comparison close

CCM.M-K2, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, EURAMET.M.M-K2.3, and EURAMET.M.M-K2.5

MEASURAND : Mass
NOMINAL VALUE : 10 kg

  • Key comparison CCM.M-K2

x(rep)i : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of x(rep)i

Three s
ets of mass standards, designated as CA, CB and CC, were circulated.
For each set of mass standards the Pilot Laboratory, PTB, carried out two measurements: the first one before the circulation and the second one after the circulation, as indicated respectively by (1) and (2).

xi : difference between the mass determined by laboratory i, x(rep)i, and that determined by the Pilot Laboratory.
The Pilot's mass value is the average of the two results obtained before and after the circulation.

 Lab i x(rep)i ui xi Date of measurement
 Set of mass standards CA        
 PTB (1)

-2.135

0.122 -0.006 Mar 98
 NMIA

-2.200

0.340 -0.071 Jul 98
 KRISS

-2.296

0.148 -0.167 Aug 98
 NMIJ

-1.930

0.280 0.199 Sep 98
 NIM

-1.700

0.500 0.429 Nov 98
 PTB (2)

-2.123

0.122 0.006 Mar 99
 Set of mass standards CB        
 PTB (1)

-3.071

0.122 -0.019 Mar 98
 NPL

-3.200

0.150 -0.149 Aug 98
 CENAM

-1.680

0.760 1.371 Sep 98
 NRC

-1.200

0.970 1.851 Nov 98
 NIST

-2.952

0.197 0.099

Dec 98

 PTB (2)

-3.032

0.122

0.019

Mar 99

 Set of mass standards CC        
 PTB (1)

-8.542

0.122

-0.023

Mar 98

 VSL

-8.900

1.100

-0.381

Jun 98

 SMU

-6.870

0.860

1.649

Aug 98

 METAS

-8.465

0.251

0.054

Sep 98

 LNE

-8.800

0.300

-0.281

Oct 98

 INRIM

-8.760

0.228

-0.241

Nov 98

 PTB (2)

-8.496

0.122

0.023

Mar 99

Note: all values are expressed in mg

  • Key comparison EUROMET.M.M-K2

The results and uncertainties reported by the participants in EUROMET.M.M-K2 are given in Table 2 of the EUROMET.M.M-K2 Final Report.

  • Key comparison EUROMET.M.M-K2.1

The results and uncertainties reported by the participants in EUROMET.M.M-K2.1 are given in Table 3 of the EUROMET.M.M-K2.1 Final Report.

  • Key comparison APMP.M.M-K2

The results and uncertainties reported by the participants in APMP.M.M-K2 are given in Table 1 of the APMP.M.M-K2 Final Report.

  • Key comparison EURAMET.M.M-K2.3

The results and uncertainties reported by the participants in EURAMET.M.M-K2.3 are given in Table 2 of the EURAMET.M.M-K2.3 Final Report.

  • Key comparison EURAMET.M.M-K2.5

The results and uncertainties reported by the participants in EURAMET.M.M-K2.5 are given in Table 7 of the EURAMET.M.M-K2.5 Final Report.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 500 g

Note: all values are expressed in mg

  • Key comparison CCM.M-K2

x(rep)i : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of x(rep)i

Three s
ets of mass standards, designated as CA, CB and CC, were circulated.
For each set of mass standards the Pilot Laboratory, PTB, carried out two measurements: the first one before the circulation and the second one after the circulation, as indicated respectively by (1) and (2).

xi : difference between the mass determined by laboratory i, x(rep)i, and that determined by the Pilot Laboratory.
The Pilot's mass value is the average of the two results obtained before and after the circulation.

 Lab i x(rep)i ui xi Date of measurement
Set of mass standards CA        
 PTB (1)

-0.1801

0.0062 -0.0028 Mar 98
 NMIA

-0.1820

0.0200 -0.0047 Jul 98
 KRISS

-0.1719

0.0073 0.0054 Aug 98
 NMIJ

-0.1490

0.0080 0.0283 Sep 98
 NIM

-0.1700

0.0120 0.0073 Nov 98
 PTB (2)

-0.1745

0.0062 0.0028 Mar 99
Set of mass standards CB        
 PTB (1)

-0.2149

0.0062 -0.0019 Mar 98
 NPL

-0.2090

0.0074 0.0040 Aug 98
 CENAM

-0.1922

0.0094 0.0208 Sep 98
 NRC

-0.2062

0.0078 0.0068 Nov 98
 NIST

-0.2108

0.0081 0.0022

Dec 98

 PTB (2)

-0.2111

0.0062

0.0019

Mar 99

Set of mass standards CC        
 PTB (1)

-0.5135

0.0062

-0.0021

Mar 98

 VSL

-0.5600

0.0200

-0.0487

Jun 98

 SMU

-0.5140

0.0220

-0.0027

Aug 98

 METAS

-0.5010

0.0151

0.0104

Sep 98

 LNE

-0.5140

0.0150

-0.0027

Oct 98

 INRIM

-0.4990

0.0076

0.0124

Nov 98

 PTB (2)

-0.5092

0.0062

0.0021

Mar 99

  • Key comparison APMP.M.M-K6

xAPMP i : reported result obtained as the difference between the measurement of the mass standards carried out by laboratory i and its nominal value
uAPMP i : combined standard uncertainty of xAPMP i

As APMP.M.M-K6 Pilot Laboratory, VMI-STAMEQ determined the mass of the travelling standards four times for Loop A of the comparison, and three times for Loop B of the comparison.

 Lab i xAPMP i uAPMP i Date of measurement
Loop A      
 VMI-STAMEQ

0.213

0.0207 May 2005
 NMISA

0.17

0.125 June 2005
 NMIA

0.228

0.024 September 2005
 VMI-STAMEQ

0.201

0.0374 November 2005
 ITDI

0.265

0.043 December 2005
 NIMT

0.237

0.038 January 2006
 VMI-STAMEQ

0.209

0.0374 April 2006
 NIS

-

- July 2006
 VMI-STAMEQ

0.198

0.0374 November 2006
Loop B      
 VMI-STAMEQ

0.148

0.0207

May 2005

 MUSSD

0.1216

0.133

June 2005

 NPLI

0.191

0.041

October 2005

 VMI-STAMEQ

0.139

0.0374

December 2005

 KIM-LIPI*

-

0.031

March 2006

 VMI-STAMEQ

-4.45

0.0374

October 2006

* Measurement results invalidated due to damage of the transfer standards

  • Key comparison EUROMET.M.M-K2

The results and uncertainties reported by the participants in EUROMET.M.M-K2 are given in Table 2 of the EUROMET.M.M-K2 Final Report.

  • Key comparison EUROMET.M.M-K2.1

The results and uncertainties reported by the participants in EUROMET.M.M-K2.1 are given in Table 3 of the EUROMET.M.M-K2.1 Final Report.

  • Key comparison APMP.M.M-K2

The results and uncertainties reported by the participants in APMP.M.M-K2 are given in Table 1 of the APMP.M.M-K2 Final Report.

  • Key comparison APMP.M.M-K2.1

The results and uncertainties reported by the participants in APMP.M.M-K2.1 are given in Table 1 of the APMP.M.M-K2.1 Final Report.

  • Key comparison EURAMET.M.M-K2.2

The results and uncertainties reported by the participants in EURAMET.M.M-K2.2 are given in Table 10 of the EURAMET.M.M-K2.2 Final Report.

  • Key comparison EURAMET.M.M-K2.3

The results and uncertainties reported by the participants in EURAMET.M.M-K2.3 are given in Table 2 of the EURAMET.M.M-K2.3 Final Report.

  • Key comparison EURAMET.M.M-K2.6

The results and uncertainties reported by the participants in EURAMET.M.M-K2.6 are given in Table 6 of the EURAMET.M.M-K2.6 Final Report.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1, APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
EURAMET.M.M-K2.3, and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 20 g

Note: all values are expressed in mg

  • Key comparison CCM.M-K2

x(rep)i : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of x(rep)i

Three s
ets of mass standards, designated as CA, CB and CC, were circulated.
For each set of mass standards the Pilot Laboratory, PTB, carried out two measurements: the first one before the circulation and the second one after the circulation, as indicated respectively by (1) and (2).

xi : difference between the mass determined by laboratory i, x(rep)i, and that determined by the Pilot Laboratory.
The Pilot's mass value is the average of the two results obtained before and after the circulation.

 

 Lab i x(rep)i ui xi Date of measurement
Set of mass standards CA        
 PTB (1)

-0.0052

0.0023 -0.0009 Mar 98
 NMIA

-0.0053

0.0030 -0.0011 Jul 98
 KRISS

-0.0029

0.0009 0.0014 Aug 98
 NMIJ

-0.0040

0.0020 0.0003 Sep 98
 NIM

-0.0015

0.0020 0.0028 Nov 98
 PTB (2)

-0.0033

0.0023 0.0010 Mar 99
Set of mass standards CB        
 PTB (1)

-0.0035

0.0023 0.0007 Mar 98
 NPL

-0.0008

0.0009 0.0034 Aug 98
 CENAM

-0.0016

0.0021 0.0026 Sep 98
 NRC

-0.0015

0.0037 0.0027 Nov 98
 NIST

-0.0011

0.0010 0.0031

Dec 98

 PTB (2)

-0.0049

0.0023

-0.0007

Mar 99

Set of mass standards CC        
 PTB (1)

-0.0024

0.0023

0.0000

Mar 98

 VSL

0.0020

0.0040

0.0044

Jun 98

 SMU

-0.0119

0.0035

-0.0095

Aug 98

 METAS

0.0064

0.0026

0.0088

Sep 98

 LNE

0.0037

0.0026

0.0061

Oct 98

 INRIM

-0.0039

0.0038

-0.0015

Nov 98

 PTB (2)

-0.0024

0.0023

0.0000

Mar 99

  • Key comparison APMP.M.M-K6

xAPMP i : reported result obtained as the difference between the measurement of the mass standards carried out by laboratory i and its nominal value
uAPMP i : combined standard uncertainty of xAPMP i

As APMP.M.M-K6 Pilot Laboratory, VMI-STAMEQ determined the mass of the travelling standards four times for Loop A of the comparison, and three times for Loop B of the comparison.

 Lab i xAPMP i uAPMP i Date of measurement
Loop A      
 VMI-STAMEQ

0.003

0.0022 May 2005
 NMISA

0.006

0.0135 June 2005
 NMIA

0.0026

0.0032 September 2005
 VMI-STAMEQ

0.0057

0.0029 November 2005
 ITDI

0.013

0.011 December 2005
 NIMT

-0.002

0.004 January 2006
 VMI-STAMEQ

-0.00074

0.0030 April 2006
 NIS

-0.018

0.009 July 2006
 VMI-STAMEQ

-0.0064

0.0030 November 2006
Loop B      
 VMI-STAMEQ

0.0005

0.0022

May 2005

 MUSSD

0.0182

0.013

June 2005

 NPLI

0.0099

0.0035

October 2005

 VMI-STAMEQ

0.004

0.0041

December 2005

 KIM-LIPI

0.009

0.0037

March 2006

 VMI-STAMEQ

0.011

0.0036

October 2006

  • Key comparison EUROMET.M.M-K2

The results and uncertainties reported by the participants in EUROMET.M.M-K2 are given in Table 2 of the EUROMET.M.M-K2 Final Report.

  • Key comparison EUROMET.M.M-K2.1

The results and uncertainties reported by the participants in EUROMET.M.M-K2.1 are given in Table 3 of the EUROMET.M.M-K2.1 Final Report.

  • Key comparison APMP.M.M-K2

The results and uncertainties reported by the participants in APMP.M.M-K2 are given in Table 1 of the APMP.M.M-K2 Final Report.

  • Key comparison APMP.M.M-K2.1

The results and uncertainties reported by the participants in APMP.M.M-K2.1 are given in Table 1 of the APMP.M.M-K2.1 Final Report.

  • Key comparison EURAMET.M.M-K2.2

The results and uncertainties reported by the participants in EURAMET.M.M-K2.2 are given in Table 10 of the EURAMET.M.M-K2.2 Final Report.

  • Key comparison EURAMET.M.M-K2.3

The results and uncertainties reported by the participants in EURAMET.M.M-K2.3 are given in Table 2 of the EURAMET.M.M-K2.3 Final Report.

  • Key comparison EURAMET.M.M-K2.6

The results and uncertainties reported by the participants in EURAMET.M.M-K2.6 are given in Table 6 of the EURAMET.M.M-K2.6 Final Report.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 2 g

Note: all values are expressed in mg

  • Key comparison CCM.M-K2

x(rep)i : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of x(rep)i

Three s
ets of mass standards, designated as CA, CB and CC, were circulated.
For each set of mass standards the Pilot Laboratory, PTB, carried out two measurements: the first one before the circulation and the second one after the circulation, as indicated respectively by (1) and (2).

xi : difference between the mass determined by laboratory i, x(rep)i, and that determined by the Pilot Laboratory.
The Pilot's mass value is the average of the two results obtained before and after the circulation.

 Lab i x(rep)i ui xi Date of measurement
Set of mass standards CA        
 PTB (1)

-0.0002

0.0007 0.0008 Mar 98
 NMIA

-0.0014

0.0006 -0.0004 Jul 98
 KRISS

0.0004

0.0004 0.0014 Aug 98
 NMIJ

0.0004

0.0005 0.0014 Sep 98
 NIM

-0.0008

0.0006 0.0002 Nov 98
 PTB (2)

-0.0018

0.0007 -0.0008 Mar 99
Set of mass standards CB        
 PTB (1)

-0.0036

0.0007 0.0003 Mar 98
 NPL

-0.0031

0.0002 0.0008 Aug 98
 CENAM

-0.0032

0.0006 0.0007 Sep 98
 NRC

-0.0004

0.0015 0.0035 Nov 98
 NIST

-0.0025

0.0004 0.0013

Dec 98

 PTB (2)

-0.0041

0.0007

-0.0003

Mar 99

Set of mass standards CC        
 PTB (1)

0.0032

0.0007

0.0005

Mar 98

 VSL

0.0010

0.0030

-0.0018

Jun 98

 SMU

0.0034

0.0020

0.0007

Aug 98

 METAS

0.0045

0.0010

0.0018

Sep 98

 LNE

0.0043

0.0010

0.0016

Oct 98

 INRIM

0.0012

0.0018

-0.0016

Nov 98

 PTB (2)

0.0023

0.0007

-0.0005

Mar 99

  • Key comparison APMP.M.M-K6

xAPMP i : reported result obtained as the difference between the measurement of the mass standards carried out by laboratory i and its nominal value
uAPMP i : combined standard uncertainty of xAPMP i

As APMP.M.M-K6 Pilot Laboratory, VMI-STAMEQ determined the mass of the travelling standards four times for Loop A of the comparison, and three times for Loop B of the comparison.

 Lab i xAPMP i uAPMP i Date of measurement
Loop A      
 VMI-STAMEQ

0.0125

0.001 May 2005
 NMISA

0.014

0.0065 June 2005
 NMIA

0.0128

0.0011 September 2005
 VMI-STAMEQ

0.0115

0.001 November 2005
 ITDI

0.006

0.01 December 2005
 NIMT

0.0112

0.0021 January 2006
 VMI-STAMEQ

0.011

0.001 April 2006
 NIS

-0.008

0.007 July 2006
 VMI-STAMEQ

0.0096

0.001 November 2006
Loop B      
 VMI-STAMEQ

-0.004

0.001

May 2005

 MUSSD

-0.0049

0.007

June 2005

 NPLI

-0.0017

0.0006

October 2005

 VMI-STAMEQ

-0.005

0.001

December 2005

 KIM-LIPI

-0.0023

0.0015

March 2006

 VMI-STAMEQ

-0.004

0.001

October 2006

  • Key comparison EUROMET.M.M-K2

The results and uncertainties reported by the participants in EUROMET.M.M-K2 are given in Table 2 of the EUROMET.M.M-K2 Final Report.

  • Key comparison EUROMET.M.M-K2.1

The results and uncertainties reported by the participants in EUROMET.M.M-K2.1 are given in Table 3 of the EUROMET.M.M-K2.1 Final Report.

  • Key comparison APMP.M.M-K2

The results and uncertainties reported by the participants in APMP.M.M-K2 are given in Table 1 of the APMP.M.M-K2 Final Report.

  • Key comparison APMP.M.M-K2.1

The results and uncertainties reported by the participants in APMP.M.M-K2.1 are given in Table 1 of the APMP.M.M-K2.1 Final Report.

  • Key comparison EURAMET.M.M-K2.2

The results and uncertainties reported by the participants in EURAMET.M.M-K2.2 are given in Table 10 of the EURAMET.M.M-K2.2 Final Report.

  • Key comparison EURAMET.M.M-K2.6

The results and uncertainties reported by the participants in EURAMET.M.M-K2.6 are given in Table 6 of the EURAMET.M.M-K2.6 Final Report.

CCM.M-K2, APMP.M.M-K6, EUROMET.M.M-K2, EUROMET.M.M-K2.1,
APMP.M.M-K2, APMP.M.M-K2.1, EURAMET.M.M-K2.2,
and EURAMET.M.M-K2.6

MEASURAND : Mass
NOMINAL VALUE : 100 mg

Note: all values are expressed in mg

  • Key comparison CCM.M-K2

x(rep)i : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of x(rep)i

Three s
ets of mass standards, designated as CA, CB and CC, were circulated.
For each set of mass standards the Pilot Laboratory, PTB, carried out two measurements: the first one before the circulation and the second one after the circulation, as indicated respectively by (1) and (2).

xi : difference between the mass determined by laboratory i, x(rep)i, and that determined by the Pilot Laboratory.
The Pilot's mass value is the average of the two results obtained before and after the circulation.

 Lab i x(rep)i ui xi Date of measurement
Set of mass standards CA        
 PTB (1)

0.0000

0.0003 0.0002 Mar 98
 NMIA

-0.0005

0.0003 -0.0003 Jul 98
 KRISS

-0.0011

0.0001 -0.0009 Aug 98
 NMIJ

-0.0009

0.0002 -0.0007 Sep 98
 NIM

-0.0007

0.0003 -0.0005 Nov 98
 PTB (2)

-0.0004

0.0003 -0.0002 Mar 99
Set of mass standards CB        
 PTB (1)

-0.0002

0.0003 -0.0001 Mar 98
 NPL

-0.0005

0.0004 -0.0004 Aug 98
 CENAM

-0.0012

0.0004 -0.0011 Sep 98
 NRC

-0.0003

0.0003 -0.0002 Nov 98
 NIST

-0.0008

0.0001 -0.0006

Dec 98

 PTB (2)

-0.0001

0.0003

0.0001

Mar 99

Set of mass standards CC        

 PTB (1)

-0.0007

0.0003

0.0004

Mar 98

 VSL

-0.0004

0.0008

0.0007

Jun 98

 SMU

-0.0002

0.0010

0.0009

Aug 98

 METAS

-0.0014

0.0003

-0.0004

Sep 98

 LNE

-0.0019

0.0004

-0.0008

Oct 98

 INRIM

-0.0019

0.0008

-0.0009

Nov 98

 PTB (2)

-0.0014

0.0003

-0.0004

Mar 99

  • Key comparison APMP.M.M-K6

xAPMP i : reported result obtained as the difference between the measurement of the mass standards carried out by laboratory i and its nominal value
uAPMP i : combined standard uncertainty of xAPMP i

As APMP.M.M-K6 Pilot Laboratory, VMI-STAMEQ determined the mass of the travelling standards four times for Loop A of the comparison, and three times for Loop B of the comparison.

 Lab i xAPMP i uAPMP i Date of measurement
Loop A      
 VMI-STAMEQ

-0.006

0.001 May 2005
 NMISA

-0.005

0.0025 June 2005
 NMIA

-0.0046

0.00047 September 2005
 VMI-STAMEQ

-0.008

0.001 November 2005
 ITDI

0.000

0.009 December 2005
 NIMT

0.0021

0.0008 January 2006
 VMI-STAMEQ

-0.005

0.001 April 2006
 NIS

-0.0054

0.0028 July 2006
 VMI-STAMEQ

-0.006

0.001 November 2006
Loop B      
 VMI-STAMEQ

0.0025

0.001

May 2005

 MUSSD

-0.0026

0.0027

June 2005

 NPLI

0.0034

0.0005

October 2005

 VMI-STAMEQ

0.0028

0.001

December 2005

 KIM-LIPI

0.0049

0.00066

March 2006

 VMI-STAMEQ

0.0034

0.001

October 2006

  • Key comparison EUROMET.M.M-K2

The results and uncertainties reported by the participants in EUROMET.M.M-K2 are given in Table 2 of the EUROMET.M.M-K2 Final Report.

  • Key comparison EUROMET.M.M-K2.1

The results and uncertainties reported by the participants in EUROMET.M.M-K2.1 are given in Table 3 of the EUROMET.M.M-K2.1 Final Report.

  • Key comparison APMP.M.M-K2

The results and uncertainties reported by the participants in APMP.M.M-K2 are given in Table 1 of the APMP.M.M-K2 Final Report.

  • Key comparison APMP.M.M-K2.1

The results and uncertainties reported by the participants in APMP.M.M-K2.1 are given in Table 1 of the APMP.M.M-K2.1 Final Report.

  • Key comparison EURAMET.M.M-K2.2

The results and uncertainties reported by the participants in EURAMET.M.M-K2.2 are given in Table 10 of the EURAMET.M.M-K2.2 Final Report.

  • Key comparison EURAMET.M.M-K2.6

The results and uncertainties reported by the participants in EURAMET.M.M-K2.6 are given in Table 6 of the EURAMET.M.M-K2.6 Final Report.