【法规名称】
【颁布时间】 2002-06-03
【法规编号】 43340 什么是编号？
【正 文】
MUTUAL RECOGNITION OF NATIONAL MEASUREMENT STANDARDS AND OF CALIBRATION AND MEASUREMENT CERTIFICATES ISSUED BY NATIONAL METROLOGY INSTITUTES
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1 Mutual recognition of national measurement standards and of cal-ibration and measurement certificates issued by national metrol-ogy institutes The essential points The Mutual Recognition Arrangement (MRA) has been drawn up by t-he International Committee of weights and Measures (CIPM), underthe authority given to it in the Metre Convention, for signatureby directors of the national metrology institutes (NMIs) of Mem-ber States of the Convention. Objectives ．to establish the degree of equivalence of national measurementstandards maintained by NMIs; ．to provide for the mutual recognition of calibration and meas-urement certificates issued by NMIs; ．thereby to provide governments and other parties with a securetechnical foundation for wider agreements related to internat-ional trade, commerce and regulatory affairs. Process ．international comparsions of measurements, to be known as keycomparisions; ．supplementary international comparisions of measurements;．quality systems and demonstrations of competecnce by NMIs.Outcome ．statements of the measurement caopabilities of each NMI in adatabase maintained by the BIPM and publicly available on theWeb. Engagement NMI directors sign the MRA with the approval of the appropriateauthorities in their own country and thereby: ．aocept the process specified in the MRA for establishing thedatabase; ．recognize the results of key and supplementary comparisions asstated in the database; ．recognize the calibration and measurement capabilities of oth-er participating NMIs as stated in the database. Exclusions ．signature of the MRA engages NMIs but not necessarily any oth-er agency in their country; ．responsibility for the results of calibrations and measuremen-ts rests wholly with the NMI that makes them and is not, thro-ugh the MRA, extended to any other participating NMI. Organizational structure ．overall coordination is by the BIPM under the authority of theCIPM, which is itself under the authority of the Member Statesof the Metre Convention; ．the Consultative Committees of the CIPM, the Regional Metrolo-gy Organizations and the BIPM are responsible for carrying outthe key and supplementary comparisons; ．a Joint Committee of the Regional Metrology Organizations andthe BIPM is responsible for analysing and transmitting entriesinto the database for the calibration and measurement capabil-ities declared by the NMIs. Preamble National accreditation and regulatory bodies require multilater-al agreements or arrangements to define the conditions under wh-ich they can accept calibration, measurement and test certifica-tes issued by laboratories accredited in other countries. Theseagreements or arrangements depend for their validity on the ac-curacy of national mesurement standards and of calibration andmeasurement certificates issued by national metrology institut-es (NMIs). This arrangement provides for the mutual recognition of nationa-l mesaurement standards and of calibration and measurement cert-ificates issued by national metrology institutes, and is foundedon the efforts of each individual national metrology instituteto base its measurements and measurement uncertainties on SI un-its. To put the criteria for mutual recognition on an objective foot-hing, the arrangement calls upon: (a) the results of a set of k-ey comparisons carried out using specified procedures which leadto a quantitative measure of the dagree of equivalence of natio-nal measurement standards; (b) the operation by each NMI of a s-uitable way of assuring quality; and (c) successful participati-on by each NMI in appropriate supplementary comparisons. Togeth-er, these three procedures demonstrate to participating institu-tions the degree to which each may have confidence in the resul-ts reported by others, and so promote mutual confidence betweenthem. For the purposes of this arrangement, the degree of equivalenceof measurement standards is taken to mean the degree to which t-hese standards are consistent with reference values determinedfrom the key comparisons and hence are consistent with one anot-her. Each reference value is referred to as a key comparison re-ference value and, in most cases, it can be considered to be aclose, but not necessarily the best, approximation to the SI va-lue. The degree of equivalence of a national measurement standa-rd is expressed quantitatively in terms of its deviation from t-he key comparison reference value and the uncertainty of this d-eviation. This arrangement is in two parts: through part one, signatoriesrecognize the degree of equivalence of national measurement sta-ndards of participating national metrology institutes; throughpart two, the signatories recognize the validity of calibrationand measurement certificates issued by participating institutes.Formally, this document is a technical arrangement among direct-ors of the national metrology institutes of Member States of theMetre Convention and it is not a diplomatic treaty. It is drawnup by the CIPM under the Metre Convention and it is neither anextension to the Convention nor a replacement of any Article ofthe convention. The directors who in due course decide to signthe arrangement do so with the approval of the appropriate gove-nmental or other offical authorities in their own country. It isexpected that participation in this arrangement will open the w-ay to, and provide the technical basis for, wider agreements re-lated to trade, commerce and regulatory affairs, signed by thecompetent authorities in each country or region. |
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