Comparison
Comparison close

CCM.M-K1, APMP.M.M-K1, EUROMET.M.M-K1, EUROMET.M.M-K4, EUROMET.M.M-K4.1, APMP.M.M-K6, COOMET.M.M-K1,
APMP.M.M-K1.1 and EURAMET.M.M-K4.2

MEASURAND : Mass
NOMINAL VALUE : 1 kg

Degrees of equivalence Di and expanded uncertainty Ui expressed in µg:
click here to access 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-K1, APMP.M.M-K1, EUROMET.M.M-K1, EUROMET.M.M-K4, EUROMET.M.M-K4.1, APMP.M.M-K6, COOMET.M.M-K1,
APMP.M.M-K1.1 and EURAMET.M.M-K4.2

MEASURAND : Mass
NOMINAL VALUE : 1 kg

Degrees of equivalence Di and expanded uncertainty Ui expressed in µg

In dark blue: laboratories participant in CCM.M-K1,
In blue: laboratories participant in APMP.M.M-K1,
In green: laboratories participant in EUROMET.M.M-K1,
In purple: laboratories participant in EUROMET.M.M-K4,
In orange: laboratories participant in EUROMET.M.M-K4.1,
In red: laboratories participant in APMP.M.M-K6,
In black: laboratories participant in COOMET.M.M-K1,
In grey: laboratories participant in APMP.M.M-K1.1,
In pink: laboratories participant in EURAMET.M.M-K4.2

No pair-wise degrees of equivalence are reported here. They may be found in the relevant Final Reports.

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).

Comparison
Comparison close
RMO comparison
Linked comparison
APMP.M.M-K6
Metrology area, Sub-field Mass and related quantities, Mass Standards
Description Comparison of mass standards
Time of measurements 2005 - 2006
Status Approved for equivalence
Final Reports of the comparisons
Measurand Mass: 100 mg, 2 g, 20 g, 500 g and 1 kg
Transfer device Two sets of weights of class E2
Comparison type Key Comparison
Consultative Committee CCM (Consultative Committee for Mass and Related Quantities)
Conducted by APMP (Asia Pacific Metrology Programme)
Comments

APMP.M.M-K6 results published on 24 October 2008

Comparison of (sub)multiples of the kilogram

APMP.M.M-K6 results are linked to those of CCM.M-K1 for nominal value 1 kg, and to those of CCM.M-K2 for nominal values 500 g, 20 g, 2 g, and 100 mg.

Pilot institute VMI-STAMEQ
Viet Nam Metrology Institute, Directorate for Standards and Quality
Viet Nam
Contact person Le Hong Phong

+84 4 8361872 or +84 4 8361137
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
VMI-STAMEQ

Viet Nam Metrology Institute, Directorate for Standards and Quality, Viet Nam, APMP

MASM

Mongolian Agency for Standardization and Metrology, Mongolia, APMP

MUSSD

Department of Measurement Units, Standards and Services, Sri Lanka, APMP

NIMT

National Institute of Metrology (Thailand), Thailand, APMP

NIS

National Institute for Standards, Egypt, AFRIMETS

NMIA

National Measurement Institute, Australia, Australia, APMP

NPLI

CSIR National Physical Laboratory of India, India, APMP

NSCL

National Standards and Calibration Laboratory, Syrian Arab Republic, APMP

STD-ITDI

Standards and Testing Division, Industrial Technology Development Institute, Philippines, APMP

Comparison
Comparison close

CCM.M-K1, APMP.M.M-K1, EUROMET.M.M-K1, EUROMET.M.M-K4, EUROMET.M.M-K4.1, APMP.M.M-K6, COOMET.M.M-K1,
APMP.M.M-K1.1 and EURAMET.M.M-K4.2

MEASURAND : Mass
NOMINAL VALUE : 1 kg

  • Key comparison CCM.M-K1

The key comparison reference value, xR, is evaluated as the median of the xi values (the BIPM zero value being counted only once), and its standard uncertainty, uR, as the standard deviation of median (see Appendix 2 of CCM.M-K1 Final Report).

xR = -3.0 µg and uR = 2.2 µg

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 µg. Detailed information on the evaluation of Ui may be found in Appendix 3 of CCM.M-K1 Final Report.

The degree of equivalence between two laboratories participant in CCM.M-K1 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 µg. Detailed information on the evaluation of Uij may be found in Appendix 3 of CCM.M-K1 Final Report.
  • Linking APMP.M.M-K1 results to CCM.M-K1 results

The APMP.M.M-K1 results were analyzed and linked to the CCM.M-K1 results using Generalised Least-Squares (sometimes known as Gauss-Markov) estimation (see section 7 of APMP.M.M-K1 Final Report).
This analysis directly combines the APMP comparison results with the CCM.M-K1 results of the three linking laboratories (KRISS, NMIA, and NMIJ) to estimate the degrees of equivalence:

1) the degree of equivalence of each laboratory i participant in APMP.M.M-K1 relative to the CCM.M-K1 key comparison reference value, Di and Ui, with Ui the expanded uncertainty (k = 2) of Di, and

2) the degree of equivalence between pairs of laboratories i and j both participant in APMP.M.M-K1, Dij and Uij, with Uij the expanded uncertainty (k = 2) of Dij.

The degree of equivalence between two laboratories i and j, one participant in CCM.M-K1 and the other one in APMP.M.M-K1, is given by a pair of terms: Dij = Di - Dj and Uij, its expanded uncertainty (k = 2).
Uij may be estimated as Uij = [Ui2 + Uj2 - 2(2uR)2]1/2 since both Ui and Uj include the uncertainty associated with the key comparison reference value. These values are not explicitely given here.

  • Linking EUROMET.M.M-K1 results to CCM.M-K1 results

The EUROMET.M.M-K1 results were analyzed and linked to the CCM.M-K1 results as explained in the Linkage Report, using the values obtained by the three linking laboratories (PTB, INRIM, and NPL).

It leads to the estimation of the degree of equivalence of each laboratory i participant in EUROMET.M.M-K1 relative to the CCM.M-K1 key comparison reference value, Di and Ui, with Ui the expanded uncertainty (k = 2) of Di.

The pair-wise degrees of equivalence inside EUROMET.M.M-K1 are given on pages 12, 16, and 19 of the EUROMET.M.M-K1 Final Report for mass standards PTBC, INM11, and the mean of both, respectively.

  • Linking EUROMET.M.M-K4 and EUROMET.M.M-K4.1 results to CCM.M-K1 results

The EUROMET.M.M-K4 and EUROMET.M.M-K4.1 results were analyzed and linked to the CCM.M-K1 results as explained in Appendix A of the EUROMET.M.M-K4 Final Report. The linking laboratories between EUROMET.M.M-K4 and CCM.M-K1 are PTB, INRIM, and NPL. The linking laboratory between EUROMET.M.M-K4.1 and EUROMET.M.M-K4 is DFM.

It leads to the estimation of the degree of equivalence of each laboratory i participant in EUROMET.M.M-K4 and K4.1 relative to the CCM.M-K1 key comparison reference value, Di and Ui, with Ui the expanded uncertainty (k = 2) of Di.

The pair-wise degrees of equivalence inside EUROMET.M.M-K4 are given on pages 10 to 13 of the EUROMET.M.M-K4 Final Report, and the pair-wise degree of equivalence between DFM and MIRS, as obtained in EUROMET.M.M-K4.1, on page 7 of the EUROMET.M.M-K4.1 Final Report.

  • Linking APMP.M.M-K6 to CCM.M-K1

The APMP.M.M-K6 results obtained for 1 kg were analyzed and linked to the CCM.M-K1 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-K1 results of the three linking laboratories (NMIA, NIMT, and NMISA) for Loop A, and the single linking laboratory (NPLI) for Loop B, to estimate:

- the degree of equivalence of each laboratory participant in APMP.M.M-K6 with respect to the CCM.M-K1 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 for 1 kg are given on page 14 of the APMP.M.M-K6 Final Report.

Artefacts of nominal values 500 g, 20 g, 2 g, and 100 mg are also measured in the framework of key comparison APMP.M.M-K6. This is reported together with CCM.M-K2 results.

  • Linking COOMET.M.M-K1 to CCM.M-K1

The link is made using PTB values in both comparisons (see on page 6 of the COOMET.M.M-K1 Final Report).

The pair-wise degrees of equivalence inside COOMET.M.M-K1 are given on page 8 of the COOMET.M.M-K1 Final Report.
  • Linking APMP.M.M-K1.1 to CCM.M-K1

The link is made using NMIA results in both comparisons (see Section 8 of the APMP.M.M-K1.1 Final Report).

The pair-wise degree of equivalence between NMIA and A*STAR is given on page 8 of the APMP.M.M-K1.1 Final Report.
  • Linking EURAMET.M.M-K4.2 to CCM.M-K1

The link is made through the EUROMET.M.M-K4 key comparison using BEV and EIM results in both comparisons (see Section 5 of the EURAMET.M.M-K4.2 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

  • 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-K1, APMP.M.M-K1, EUROMET.M.M-K1, EUROMET.M.M-K4, EUROMET.M.M-K4.1, APMP.M.M-K6, COOMET.M.M-K1,
APMP.M.M-K1.1 and EURAMET.M.M-K4.2

MEASURAND : Mass
NOMINAL VALUE : 1 kg

  • Key comparison CCM.M-K1

x(rep)i : reported result obtained as the difference between the measurement of the mass standards carried out by laboratory i (being evaluated as the average mass of two 1 kg artefacts) and the nominal value 1 kg
ui : combined standard uncertainty of x(rep)i

Seven participating laboratories determined the mass of the travelling standards VSL-1 and J2 (Package 1) while the remaining seven determined the mass of the travelling standards VSL-2 and J3 (Package 2).
As Pilot laboratory, the BIPM determined the mass of the travelling standards of each package at the beginning and at the end of the comparison, and a few times during the course of the comparison.

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 measurement at laboratory i, except for PTB and SMU where only the BIPM result of May 96 is used, and NIM where only the BIPM result of Feb 97 is used (see CCM.M-K1 Final Report).

Set of mass standards: Package 1

 Lab i x(rep)i
/ mg
ui
/ mg
xi
/ mg
Date of measurement
 BIPM

1.928

0.012 0.000 Feb 95
 NMi-VSL

1.905

0.018 -0.018 May 95
 NPL

1.923

0.016 -0.001 Jul 95
 BIPM

1.918

0.012 0.000 Sep 95
 VNIIM

1.963

0.024 0.046 Feb 96
 BIPM

1.915

0.012 0.000 May 96
 PTB

1.911

0.012 -0.004 Aug 96
 SMU

1.972

0.022 0.057 Dec 96
 BIPM

1.917

0.012 0.000 Feb 97
 KRISS

1.913

0.014 -0.004

Mar 97

 BIPM

1.918

0.012

0.000

Apr 97

 LNE-INM

1.919

0.011

0.003

Jul 97

 BIPM

1.914

0.012

0.000

Sep 97

Set of mass standards: Package 2

 Lab i x(rep)i
/ mg
ui
/ mg

xi
/ mg

Date of measurement
 BIPM

1.803

0.012 0.000 Feb 95
 NIST

1.775

0.019 -0.021 Jul 95
 NRC

1.776

0.016 -0.020 Sep 95
 NMIJ

1.773

0.013 -0.023 Feb 96
 BIPM

1.789

0.012 0.000 May 96
 NMIA

1.791

0.014 0.002 Jul 96
 BIPM

1.790

0.012 0.000 Sep 96
 NIM

1.830

0.021 -0.004 Oct 96
 BIPM

1.835

0.012 0.000 Feb 97
 BIPM

1.803

0.012 0.000 Feb 97
 INRIM

1.798

0.013 -0.003

May 97

 BIPM

1.799

0.012

0.000

Jun 97

 CENAM

1.794

0.013

-0.001

Sep 97

 BIPM

1.791

0.012

0.000

Oct 97

  • Key comparison APMP.M.M-K1

xAPMP i : reported result, obtained as the difference between the measurement of the mass standards carried out by laboratory i and the nominal value 1 kg
UAPMP i : expanded uncertainty (k = 2) of xAPMP i

All laboratories determined the mass of two travelling standards, Mass standard m: and Mass standard m::.
As APMP.M.M-K1 Pilot laboratory, NIMT determined the mass of the travelling standards five time during the course of the comparison.

 Lab i xAPMP i
/ mg
UAPMP i
/ mg

xAPMP i
/ mg

UAPMP i
/ mg

Date of measurement

Mass standard m:

Mass standard m::

 NIMT

0.081

0.032

-0.127

0.032

20-21 Jul 99
 CMS/ITRI

0.099

0.026

-0.113

0.026

19-27 Aug 99
 NMIJ

0.115

0.076

-0.089

0.076

Sep 99
 NIMT

0.090

0.032

-0.125

0.032

30 Nov-1 Dec 99
 NPLI

0.101

0.028

-0.097

0.028

28-31 Dec 99
 MSL

0.114

0.041

-0.068

0.041

Feb-Mar 00
 NIMT

0.123

0.032

-0.088

0.032

30-31 Mar 00
 NML-SIRIM

0.120

0.110

-0.070

0.110

24 Apr 00
 ITDI

0.281

0.073

0.118

0.069

May-Jun 00
 KRISS

0.095

0.029

-0.099

0.029

23 Jun-11 Jul 00

 NIMT

0.080

0.032

-0.086

0.032

08-09 Aug 00

 NMIA

0.094

0.030

-0.094

0.030

Sep 00

 SCL

0.087

0.044

-0.093

0.044

Oct 00

 SPRING

0.18

0.13

0.03

0.12

Nov 00

 VMI

-0.022

0.042

-0.214

0.042

08-30 Dec 00

 NMISA

0.100

0.040

-0.095

0.040

08 Jan 01

 NIS

0.039

0.041

-0.154

0.041

22-26 Nov 01

 NIMT

0.092

0.032

-0.097

0.032

18-19 Jun 01

  • Key comparison EUROMET.M.M-K1

xEUR i : reported result, obtained as the difference between the measurement of the mass standards carried out by laboratory i and the nominal value 1 kg
uEUR i : standard uncertainty (k = 1) of xEUR i

 Lab i xEUR i
/ µg
uEUR i
/ µg

xEUR i
/ µg

uEUR i
/ µg

Date of measurement

Mass standard PTBC

Mass standard INM11

 JV

-577

23.5

2428

21.5

May 95
 SP

-589

18.0

2411

18.0

Jun 95
 MIKES

-596

17.2

2393

17.1

Sep-Oct 95
 DFM

-571

20.0

2444

20.0

Nov 95
 PTB

-589

14.8

2422

13.2

Apr-May 96
 INRIM

-559

13.6

2451

13.9

Jun-Aug 96
 NPL

-572

14.4

2432

14.9

Aug-Sep 96
 SMD

-599

21.0

2401

21.0

Nov 96
 LNE

-591

18.0

2415

18.0

Dec-Feb 97
 CEM

-600

17.0

2412

17.1

Mar-Apr 97

  • Key comparison EUROMET.M.M-K4

xEUR4 i : reported result, obtained as the difference between the measurement of the mass standards carried out by laboratory i and the nominal value 1 kg
uEUR4 i : standard uncertainty (k = 1) of xEUR4 i

 Lab i xEUR4 i
/ µg

xEUR4 i
/ µg

uEUR4 i
/ µg

Date of measurement
Mass standard

m61 m61D

 SMD

-807

-997

25

Feb 01
 NMi-VSL

-799

-984

11

Mar 01
 CEM

-815

-1002

10

Apr 01
 GUM

-784

-976

29

Jun 01
 CMI

-835

-1018

70

Jul 01
 PTB

-786

-980

13

Aug 01
 SMU

-798

-985

15

Sep 01
 NPL

-802

-993

12

Sep 01

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.