【法规名称】
【颁布时间】 2002-06-03
【法规编号】 43340 什么是编号？
【正 文】
第4页 MUTUAL RECOGNITION OF NATIONAL MEASUREMENT STANDARDS AND OF CALIBRATION AND MEASUREMENT CERTIFICATES ISSUED BY NATIONAL METROLOGY INSTITUTES
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[接上页] 11.2 To withdraw from the arrangement, the Director of a signat-ory institute should notify the Director of the BIPM six m-onths prior to the effectivee date of withdrawal. The Dire-ctor of the BIPM will notifiy all other signatories of suchnotice of withdrawal not later than one month after it hasbeen received. 11.3 during the period from October 1999 until such time as thefirst round of key and supplementary comparisons has been completed and the quality systems specified in paragraph 7.3 put in place, the arrangement will operate in a transiti-onal mode. Provisional degrees of equivalence (Appendix B)will be based on the results of comparisons carried out si-nce about 1988, reviewed and approved by the Consultative committee for each filed and entered into the key comparis-on database referred to in paragraph 3.1. Provisional cali-bration Capabilities and measurement capbilities (Appendix-C) will be based on corresponding data reviewed by the RM-Os and analysed by the JCRB, taking into account the proc-edures specified in paragraph 7.3 and included in the key comparison database. 11.4 After the initial period of four years, signatiories may,with the approval of the appropriate govenmental or other official authorities in their own country, make changes tothis arrangement at meetings organized by the CIPM of dirc-etors of the national metrology institutes. 12 Status of national measurement standards calibrated by the B-IPM or by a national metrology institute Nothing in this arrangement restricts the rights under the M-etre Convention of participating national metrology institut-es to have their national standards calibrated by the BIPM orby another national metrology institute. The mutual recognit-ion of such standards depends upon subsequent participationin key or supplementary comparisons (see paragraphs 3 and 6above). 13 NMIs that are not members of an RMO Those NMIs that wish to participate in this arrangement buyare not members of an RMO, should either form a new RMO, orfor the purposes of this arrangement, associate themselves w-ith an existing RMO, whichever is the more appropriate. If n-either approach is possible, they should seek to make specialprovisions. 14 NMIs that are members of more than one RMO Those NMIs that are members of more than one RMO must declarewith which RMO they will paricipate in part two of this arra-ngement. 15 Entry of new RMOs into the joint Committee The entry of a new RMO into the Joint Committee is subject toapproval by the CIPM. The technical basis for this arrangement is the set of resul-ts obtained during the key comparisons carried out by the Co-nsultative Committees, the BIPM and the RMOs (paragraph 3.1). The following specify conventions and responsibilites rela-ting to the key comparisons. T.1 CIPM key comparisons lead to reference values, known askey comparison reference values. T.2 For the purposes of this arrangement, the term degree ofequivalence of measurement standards is taken to mean the degree to which a standard is consistent with the key co- mparison reference value. The degree of equivalence of e- ach national measurement standard is expressed quantitat- ively by two terms: its deviation from the key comparison reference value and the uncertainty of this deviation (at a 95% level of confidence). The degree of equivalence be- tween pairs of national measurement standards is express- ed by the difference of their deviations from the refere- nce value and the uncertainty of this difference (at a 95 % level of confidence). T.3 Although a key comparison reference value is normally aclose approximation to the corresponding SI value, it is possible that some of the values submitted by individual participants may be even closer. In a few instances, for example in some chemical measurements, there may be diff- iculty in relating results to the SI. Nevertheless, the key comparison reference value and deviations from it are good indicators of the SI value. For this reason, these values are used to express the degree of equivalence bet- ween the standards of paricipating laboratories. In some exceptional cases, a Consultative Committee may conclude that for technical reasons a reference value for a parti- cular key comparison is not appropriate; the results are then expressed directly in terms of the degrees of equiv- alence between pairs of standards. T.4 The results of the RMO key comparisons are linked to keycomparison reference values established by CIPM key comp- arisons by the common participation of some institutes in both CIPM and RMO comparisons. The uncertainty with which comparison data are propagated depends on the number of institutes taking part in both comparisons and on the qu- ality of the results reported by these institutes. T.5 The results of the CIPM and the RMO key comparisons, thekey comparison reference values, the deviations from the reference values and their uncertainties, together with |
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