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18th meeting of Joint Committee for Measurement Standards:

31 March 2020, Kazakhstan



30th COOMET Committee meeting:

1-2 April 2020, Nur-Sultan, Kazakhstan

The COOMET Measurement Standards Joint Committee (COOMET MSJC) was established at the 12-th COOMET Committee Meeting in Havana in May 2002 with the purpose to improve COOMET structure.


The COOMET MSJC uses in its activities valid documents and procedures issued by COOMET as well as by Bureau International des Poids et Mesures (BIPM) and Joint Committee of the Regional Metrology Organizations and BIPM (JCRB). A Vice-President responsible for representing COOMET in JCRB coordinates the COOMET MSJC activities.


You can find the full text of MSJC rules here.


The COOMET MSJC coordinates and ensures methodological basis of cooperation between National metrology institutions (NMI) of COOMET member-countries in the following fields.


  • implementation in the COOMET member-countries of the Arrangement on Recognition of National Measurement Standards and of Calibration and Measurement Certificates Issued by National Metrology Institutes (CIPM MRA; hereinafter referred to as Arrangement); that serves in particular for preparation of  Calibration and Measurement Capabilities (CMCs) (Appendix C of the Key Comparison Database);
  • planning, organization and methodological support of COOMET key and supplementary comparisons (Appendix B);
  • organization and realization of COOMET Projects concerning establishment and improvement of measurement standards or new measurement methods;
  • generating proposals of cooperation projects in the field of measurement standards;
  • Other matters concerning cooperation in the field of measurement standards, which are given in Section 4 of the COOMET Memorandum of Understanding (MoU).

Calibration and Measurement Capabilities (CMCs)

In the context of the CIPM MRA and ILAC Arrangement, and in relation to the CIPM-ILAC Common Statement, the following shared definition was agreed upon:
“A CMC is a calibration and measurement capability available to customers under normal conditions:

  • as published in the BIPM key comparison database (KCDB) of the CIPM MRA; or
  • as described in the laboratory’s scope of accreditation granted by a signatory to the ILAC Arrangement."

Where the term NMI is used it is intended to include Designated Institutes (DIs) within the framework of the CIPM MRA.


In the KCDB, a CMC is described by the measured quantity and its range, and is characterized by an uncertainty generally given at a 95 % level of confidence, together with the method or instrument used, the values of the influence parameters if any, and any other relevant information. CMCs are published in the APPEDNIX C of the KCDB.


Before publication in the KCDB each CMC should pass through the intraregional (intraRMO) and interregional (interRMO) review. The  interRMO review is conducted by RMO TC Chairs through the restricted access JCRB web portal. Both intra- and interRMO review procedures for COOMET are described in the COOMET R/GM/4:2014 Recommendation.


The main document regualting CMCs in the context of the CIPM MRA is CIPM-MRA-D-04

For each measuement field CMCs are classified into Services or Service Categories:


Classification of services in the various fields in English (from the BIPM website):

| AUV | EM | L | M | PR | QM | RI | T | TF


Classification of services in the various fields in Russian.


Calibration and Measurement Capabilities of the COOMET member countries (CMCs)


Comparison of measurement standards (comparison): Establishing a relationship between measurement results when reproducing and transmitting a unit of measure or a measurement scale with these standards.There are:


  • Key comparison: One of the set of comparisons selected by a Consultative Committee to test the principal techniques and methods of measurement in the field.
  • CIPM key comparison is a key comparison executed in the framework of a
    Consultative Committee or by the BIPM. A CIPM key comparison leads to a key comparison reference value.
  • RMO key comparison is a key comparison executed in the framework of a regional
    metrology organization. COOMET key comparison: A key comparison of national measurement standards organized by the NMI’s of COOMET.
  • Supplementary comparison  is a comparison, usually carried out by an RMO to meet specific needs not covered by key comparisons (e.g. regional needs), for instance measurements of specific artefacts, or measurements of parameters not within the “normal” scope of the Consultative Committees. Supplementary comparisons of COOMET: Comparisons of national measurement standards, organized by the COOMET NMI’s that are executed alongside with the key comparisons.
  • COOMET pilot comparison: A comparison of the NMI national measurement standards, organized by NMI COOMET and executed before a COOMET key comparison with the purpose of preliminary estimation of possible deviations of measurement results in the COOMET key comparison.


All key and supplementary comparisons are registered and their results are published in the KCDB Appendix B . Key and supplementary comparisons are  normally considered as a sufficient support for calibration and measurement capabilities (CMCs).


COOMET program of comparisons in pdf format and online.

All COOMET comparisons.



CIPM-MRA-D-05. Measurement comparisons in the CIPM MRA

CООМЕТ R/GM/12:2015 Recommendation: Rules of Maintaining of Foregoing COOMET Programme of Comparisons

COOMET R/GM/11:2017 Recommendation: Regulations for Comparison of Measurement Standards from the National Metrology Institutes of COOMET

CООМЕТ R/GM/14:2016 Recommendation: Guidelines for Data Evaluation of COOMET Key Comparisons

CООМЕТ R/GM/19:2016 Recommendation: Guideline on COOMET supplementary comparison evaluation



Calibration and Measurement Certificates Issued by NMIs in the context of the CIPM MRA

COOMET NMIs issue Calibration and Measurement Certificates in the context of the CIPM MRA according with theCООМЕТ R/GM/15:2007 Recommendation: The rules of completion of the form of calibration certificates issued by National Metrology Institutes within the scope of the CIPM MRA.



In order to be able to use the CIPM MRA logo and statement on its certificates NMI should get the official authorization from the BIPM. The rules of use of the logo and  the form of the request of authorization for the use of the logo and the statement are given in the CIPM MRA-D-02 Document.


The following COOMET institutes have been authorized to use the logo, for the fields of measurement supported by CMCs published in the KCDB:



       BelGIM from 13 November 2006  


Bosnia and Herzegovina:

       IMBIH from 10 August 2012  



       BIM from 12 September 2006 



       NIM from 27 November 2006



       CENTIS from 12 August 2011  

       CPHR from 8 March 2011  



       GEOSTM from 3 June 2014  



       BAM from 17 January 2008  

       BVL from 11 November 2016  

       PTB from 28 November 2006  

       UBA from 17 August 2007  



       KazInMetr from 13 April 2011  



       FTMC from 17 November 2014  

       LEI from 11 February 2015  


Moldova (Republic of):

       NMI (MD) from 22 April 2016  



       IFIN-HH from 29 May 2008  

       INM from 7 November 2006  


Russian Federation:

       SNIIM from 19 November 2010  

       UNIIM from 10 December 2008  

       VNIIFTRI from 13 November 2006  

       VNIIM from 13 October 2006  

       VNIIMS from 7 November 2006  

       VNIIOFI from 14 November 2006  

       VNIIR from 24 March 2015  



       SMU from 13 March 2007 



       UME from 19 October 2006 



       DP NDI "Systema" from 30 July 2007  

       NSC IM from 23 March 2007  

       SE "Ivano-Frankivskstandard metrologia" from 11 December 2013  

       SE "Ukrmetrteststandard" from 17 August 2007  



You can find full list of the authorized NMIs from all RMOs on the BIPM website here.

Last Update: 23.01.2020 | Disclaimer & Copyright | Print-Version
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