1、BRITISH STANDARD Reliability of fibre optic interconnecting devices and passive components - Part 1: Introductory guide and definitions The European Standard EN 62005-1:2001 has the status of a British Standard ICs 33.180.20: 33.180.99 BS EN IEC 62005-12001 62005-1 2001 U- liEEF% present to the resp
2、onsible internationallEuropean 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. - A list of organizations represented on this committee can be obtained on
3、 request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from
4、 both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI
5、Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary o
6、f pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. ISBN O 580 38241 9 EUROPEAN STANDARD EN 62005-1 NORME EUROPENNE EUROPISCHE NORM June
7、 2001 ICs 33.180.20 English version Reliability of fibre optic interconnecting devices and passive components Part I : Introductory guide and definitions (IEC 62005-1 :2001) Fiabilit des dispositifs dinterconnexion et des composants passifs fibres optiques Partie I : Guide dintroduction et dfinition
8、s (CE1 62005-1 12001) Zuverlssigkeit von LWL-Verbindungselementen und passiven Bauelementen Teil 1: Einfhrender Leitfaden und Defin ition en (I EC 62005-1 1200 I ) This European Standard was approved by CENELEC on 2001-0501. CENELEC members are bound to comply with the CENKENELEC Internal Regulation
9、s which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Upto-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This Euro
10、pean Standard 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
11、the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization
12、Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stasart 35, B - 1050 Brussels 0 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62005-1:2001 E EN 62
13、005-1:2001 Foreword The text of document 86B/1437/FDIS, future edition 1 of IEC 62005-1, 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 62005-1 on 2001-0501.
14、The 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 - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part
15、of the body of the standard. In this standard, annex ZA is normative. Annex 24 has been added by CENELEC. (dop) 2002-02-01 (daw) 2004-05-01 Endorsement notice The text of the International Standard IEC 62005-1:2001 was approved by CENELEC as a European Standard without any modification. In the offic
16、ial version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60721-3-3 NOTE: Harmonized as EN 60721-3-31995 (not modified). IEC 60721-3-4 NOTE: Harmonized as EN 60721-34:1995 (not modified). IEC 61300-2-24 NOTE: Harmonized as EN 61300-2-24:2000 (not modified).
17、 2 CONTENTS Page INTRODUCTION 4 Clause 1 Scope 5 Overall view of the parts comprising IEC 62005 5 2 Normative references . 5 3 4 Reliability approach 6 5 Definitions and terminology, symbols and abbreviations 7 5.1 5.2 Symbols and abbreviations . 13 Programs leading to a reliable manufactured produc
18、t 13 6.1 New product family 14 6.2 Product acceptance . 14 6.3 6.4 New product generation . 14 6.5 Field data . 15 Definitions and terminology . 7 6 Product life cycle 14 Bibliography 16 Annex ZA (normative) Normative references to international publications with their corresponding European publica
19、tions 17 0 BSI 5 September 2001 3 EN 62005-1:2001 INTRODUCTION When assessing the reliability of a passive optical component, it is important to also note that appropriate definitions of the service environment, expected lifetime and definition of failure need to be applied properly in the context o
20、f the product use. Because of many variations in the application and failure criteria, the reader is encouraged to utilize all clauses of this part of IEC 62005 in their proper context. The reader is particularly warned to avoid any over- simplification of reliability by using a single number such a
21、s FIT as a basis of comparison, because without the proper full context noted above, such a comparison would be meaningless. 4 BSI 5 September 2001 EN 62005-1:2001 RELIABILITY OF FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS - Part i: Introductory guide and definitions 1 Scope This part
22、 of IEC 62005 is a guide for assessing the reliability interconnecting devices and passive components. It is intended to be applied to all types of fibre-optic interconnecting devices and passive optical components. The family of applicable types includes, but is not limited to, passive devices used
23、 for connection, branching, switching, minimization of reflection, control of powerattenuation, dispersion compensation, modulation and wavelength selection or filtering. Closures may be included in the future. 2 Normative references The following normative documents contain provisions which, throug
24、h reference in this text, constitute provisions of this part of IEC 62005. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 62005 are encouraged to investigate the possibility of applying
25、 the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60050(191):1990, International Electrotechnical Vo
26、cabulary (IEV) - Chapter 191: Dependability and quality of service IEC 61300 (all parts), Fibre optic interconnecting devices and passive components - Basic test and measurement procedures 3 Overall view of the parts comprising IEC 62005 IEC 62005-1 is intended to provide general guidance, with an o
27、verview and relevant terminology. It includes normative and informative references. IEC 62005-2 is an application note to provide guidance in defining the reliability of passive optical devices. It provides advice on life testing procedures, the calculation of failure rates and the presentation of r
28、esults. In addition to the general guidance, a worked example is given showing the method of calculating the hazard rate for a device during its service lifetime, based on accelerated life tests. IEC 62005-3 focuses on the failure mechanisms associated with interconnecting devices and passive optica
29、l components. In order to estimate the reliability by acceleration testing of IEC 62005-2, it is very important to determine the dominant failure mechanism and related tests. IEC 62005-3 introduces a choice of relevant tests from the IEC 61300 series of fibre optic tests for each known failure mecha
30、nism and failure effects related to certain failure modes. BSI 5 September 2001 5 EN 62005-1:2001 IEC 62005-4 describes the application of a screening process. It notes that a proper screening process is actually a process, not a test. As a process it shall be maintained and constantly validated to
31、ensure that it achieves the purpose for which it was defined. This process is applied to a product in order to induce products with a known failure mechanism to fail in a controlled situation before the product is deployed in the field. IEC 62005-6 is intended to provide guidance on the use of field
32、 data for assessing the reliability performance of a device. IEC 62005-7 (under consideration) describes a common set of procedures for calculating the reliability of fibre optic connectors, splices and passive branching devices. The standard deals specifically with component reliability as calculat
33、ed from life tests which are accelerated in some manner. Without common procedures, the calculation of device reliability is subject to numerous assumptions and approaches. The subsequent stated results may be ambiguous and difficult to interpret and may lead to mistaken conclusions. 4 Reliability a
34、pproach A reliability approach, outlined in figure 1, shows a process for defining and improving the reliability aspects of a passive optical component. Each element in the reliability approach plays an important role in the reliability assessment of a passive optical component. In addition, there a
35、re several interactions between the elements that lead to improved product and ultimately improved reliability. Product evolution requirements Characterization I I Ongoing reliability assessment IEC 17301 Figure 1 - Reliability approach Characterization, specification and qualification form minimal
36、requirements of any new product. The product life cycle is an important consideration, particularly for rapidly developing products. Tests that take longer to perform than the current generation of product may have diminished value, but often provide information leading to future improvements. Once
37、a new product has been sufficiently characterized, it is typically subjected to performance testing. The testing is based on specification requirements and the outcome may include product infant mortalities. This leads to pass/fail requirements and the need for standard test and measurement procedur
38、es. 6 BSI 5 September 2001 EN 62005-1:2001 Extended qualification is based on real environments and typically involves accelerated testing. Extended qualification is required to assess the possibility of unknown degradation mech- anisms. The results often lead to corrective action and may require ad
39、ditional standard test and measurement procedures. They lead to a quantitative reliability assessment but should be verified by field data and be supported by other elements of a complete reliability programme. Designed experiments are required both to evaluate degradation mechanisms quantitatively
40、and to provide a basis for continuous improvement. The quantitative linkage of accelerated tests to actual field environments over time is often elusive because the mechanics of degradation and the interaction within the spectrum of field environments are not often properly applied. However IEC 6200
41、5-2 and IEC 62005-3 will allow proper selection and application of these parameters. This linkage can only be expressed as a degradation model, related in IEC 62005-2 which can usually be assessed only with experiments designed specifically to a given product design or technology. The diversity of d
42、esigns, technology and materials used in passive components often requires very specific experimentation that may not be universal. There are, however, several fundamental features that are required for valid results. The focus of the IEC 62005 series includes models, experiment requirements, and ty
43、pes of experiments. The final element in the reliability model is the field data. This data, when combined with the results from the designed experiments leads to a quantitative reliability assessment as shown in IEC 62005-6. Standard requirements include methods of collecting and recording data as
44、well as the analysis of such data. 5 Definitions and terminology, symbols and abbreviations 5.1 Definitions and terminology For the purpose of this part of IEC 62005, certain definitions taken from IEC 60050(191) as well as the following definitions apply. 5.1 .I accelerated test test in which the a
45、pplied stress level is chosen to exceed that stated in the reference conditions in order to shorten the time duration required to observe the stress response of the item, or to magnify the responses in a given time duration NOTE 1 To be valid, an accelerated test should not alter the basic modes and
46、 failure mechanisms or their relative prevalence NOTE 2 The term “stress“ is used in a generic sense and does not necessarily mean mechanical stress. Other examples are temperature, humidity, chemical activity, and vibrational frequency. The effective stress may be increased or extended by varying o
47、ther parameters in combination such as temperature, time and rate of application. 5.1.2 confidence level value (1 - a) of the probability associated with the limits of a confidence interval, which may be one-sided or two-sided, of the true value of the estimation parameter. Here “a“ is the stated er
48、ror risk BSI 5 September 2001 7 EN 62005-1:2001 5.1.3 defect any departure of a characteristic of an item from requirements NOTE 1 The requirements may or may not be expressed in the form of a specification. NOTE 2 A defect may or may not affect the ability of an item to perform a required function
49、5.1.4 defect population subgroup of “defective” components differing from the main population. Components in this group contain latent defects, of a common type, not screened out during manufacture or installation. The failure rate of a defect population is characterized by a declining failure rate NOTE 1 A defect population may fail by a mode or mechanism different from that of the main population. NOTE 2 A single defect population whose failures are of the same basic mode as the main population, exhibit a declining rate of early failures typically referred to as i
