1、BRITISH STANDARD BS EN 62005-7:2004 Reliability of fibre optic interconnecting devices and passive optical components Part 7: Life stress modeling The European Standard EN 62005-7:2004 has the status of a British Standard ICS 33.180.20 BS EN 62005-7:2004 This British Standard was published under the
2、 authority of the Standards Policy and Strategy Committee on 21 June 2004 BSI 21 June 2004 ISBN 0 580 43964 X National foreword This British Standard is the official English language version of EN 62005-7:2004. It is identical with IEC 62005-7:2004. The UK participation in its preparation was entrus
3、ted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/3, Fibre optic systems and active devices, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which imple
4、ment international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication doe
5、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/Europea
6、n committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages
7、 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 62005-7 NORME EUROPENNE EUROPISCHE NORM April 2004 CENELEC European Committee for Electrotechnical
8、 Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 6200
9、5-7:2004 E ICS 33.180.20 English version Reliability of fibre optic interconnecting devices and passive optical components Part 7: Life stress modeling (IEC 62005-7:2004) Fiabilit des dispositifs dinterconnexion et des composants optiques passifs fibres optiques Partie 7: Modlisation de contrainte d
10、e dure de vie (CEI 62005-7:2004) Zuverlssigkeit von LWL-Verbindungselementen und passiven LWL-Bauteilen Teil 7: Beanspruchungsmodelle (IEC 62005-7:2004) This European Standard was approved by CENELEC on 2004-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which s
11、tipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Sta
12、ndard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the nati
13、onal electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United K
14、ingdom. Foreword The text of document 86B/1896/FDIS, future edition 1 of IEC 62005-7, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62005-7 on 2004-04-01. Th
15、e following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-04-01 Annex ZA has
16、 been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62005-7:2004 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 62005-1 NOTE Har
17、monized as EN 62005-1:2001 (not modified). _ Page2 EN620057:2004 RELIABILITY OF FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE OPTICAL COMPONENTS Part 7: Life stress modeling 1 Scope This part of IEC 62005 describes a common set of procedures for estimating the reliability of fibre optic connectors
18、, splices, branching devices and other passive components. This part deals specifically with component reliability as estimated from life tests which are accelerated in some manner as in the example of IEC 62005-2. Since different material systems designed to do the same job will often respond in ve
19、ry different ways to the same stresses, both in terms of the form of the acceleration function, and the statistical distribution of failure times (or degradation observed over time), a normative standard specifying specific methods of acceleration or statistical modeling is inappropriate. Instead, t
20、his Part 7 provides a minimal normative standard for presenting data and analyses to support reliability estimates of passive components and an informative portion (bibliography) containing references to more extensive writings on physical and statistical modeling for accelerated testing. 2 Normativ
21、e references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62005-2:2001, Reliability of fib
22、re optic interconnecting devices and passive components Part 2: Quantitative assessment of reliability based on accelerated ageing tests Temperature and humidity; steady state IEC 62005-3:2001, Reliability of fibre optic interconnecting devices and passive components Part 3: Relevant tests for evalu
23、ating failure modes and failure mechanisms for passive components 3 Presenting evidence of device reliability 3.1 The argument for reliability The argument for reliability shall meet the following criteria: It shall be consistent with existing physical knowledge of the failure modes stimulated by th
24、e device specific stress as described in IEC 62005-3 and IEC 62005-5. It shall be statistically consistent with all the data gathered in experimental study of the device in question. Confidence intervals on prediction parameters must be consistent with the data and the assumed model. Statistical out
25、lier(s) shall be reported. Elimination of outliers may be justified by reasonable arguments based on an understanding of experimental procedure. Page3 EN620057:2004 3.2 Approaches to reliability The following three approaches are legitimate ways of supporting arguments that a device is reliable with
26、 respect to a specific stress: 3.2.1 Acceptance testing When the argument for reliability is based on survival of devices without failure under accelerated conditions, the time, duration and stress of the acceptance test shall be justified. The test shall be based on a realistic model that shows tha
27、t the test conditions bound plausible failure mechanisms operating during service life. Statistical confidence bounds based on probability models shall also be provided. The following shall be reported: a test shall be described (e.g. 85 C for 2 000 h) and the equivalent service life conditions shal
28、l be described (e.g. 35 C for 25 years). the set of chemical processes such that this test is an end of life test (e.g. all thermally activated processes with an activation energy greater than 0,92 eV); why this set of processes is assumed to be reasonable (e.g., for similar material systems an acti
29、vation energy below 1,0 eV has never been observed); the measured parameter and the measurement procedure used for testing (e.g. amount of degradation); the number of devices tested; the statistical confidence level supported by this experiment, and the argument for that confidence level (e.g. the e
30、stimated cumulative failure probability at 5 years is p = 0,010; the lower and upper bounds on this estimate at 90 % confidence are p = 0,005 and p = 0,018). 3.2.2 Failure or degradation models When the argument for reliability is provided by specific models of failure or degradation, the physical m
31、odel shall be described, and statistical confidence bounds for the predictions at operating conditions must be provided. The procedures used in calculating the statistical bounds shall be described or if computer software is used in the calculation, the program or its name and version shall be provi
32、ded. In particular, the following shall be reported. References to previous studies used in developing or constraining the model shall be listed. The experiment design used for parameter estimation and checking the model shall be described. The assumed operating conditions shall be described. The ex
33、trapolations and confidence bounds on those extrapolations shall be given, along with either: a) a description of the statistical procedures used to arrive at the bounds, or b) make and model of the software and version used for the analysis. Page4 EN620057:2004 3.2.3 Previous reliability qualificat
34、ion If previous reliability qualification (to this standard) of a similar material system has been done and a detailed report of the method is available, it may be used as a basis either for a failure/degradation model or an acceptance test. Page5 EN620057:2004 Annex ZA (normative) Normative referen
35、ces to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inc
36、luding any amendments) applies. NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 62005-2 2001 Reliability of fibre optic interconnecting devices and passive components Part 2: Quan
37、titative assessment of reliability based on accelerated ageing tests - Temperature and humidity; steady state EN 62005-2 2001 IEC 62005-3 2001 Part 3: Relevant tests for evaluating failure modes and failure mechanisms for passive components EN 62005-3 2001 Page6 EN620057:2004Bibliography The basic c
38、oncepts on test methods and the analytical tools available for estimating reliability of devices are given in references 3 and 4. They give descriptions of the integrated physical and statistical modeling that goes into the design and analysis of accelerated tests. Additional information is given in
39、 references 5 and 6 on experimental design and data analysis. 1 IEC 62005-1:2001, Reliability of fibre optic interconnecting devices and passive components Part 1: Introductory guide and definitions 2 IEC 62005-5,_ Reliability of fibre optic interconnecting devices and passive components Part 5: Rel
40、ating accelerated tests to standardized service environments 2 3 NELSON, W. Accelerated Testing: Statistical Models, Test Plans and Data Analysis. Wiley-Interscience, 1991 NOTE A general reference for accelerated testing and statistical methods for failure and degradation data. 4 ESCOBAR, LA. and ME
41、EKER, WQ. Statistical Methods for reliability data. Wiley, 1998. NOTE A general reference for accelerated testing and statistical methods for failure and degradation data. 5 LUVALLE, MJ., COPELAND, LR., KANNAN, S., JUDKINS, JB. and LEMAIRE, PJ. A strategy for extrapolation in accelerated testing. Be
42、ll Labs Technical Journal, 1998, Vol. 3, No 3, 139-147. NOTE This reference gives an example using kinetics to design an experiment that explores for hidden degradation or failure modes. 6 LU, CJ. and MEEKER, WQ. Using degradation measures to estimate a time to failure distribution. Technometrics, 1
43、993, 35, 169-174. NOTE This reference discusses the use of degradation instead of failure data. _ _ 2Under consideration. Page7 EN620057:2004BS EN 62005-7:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing Br
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