01271525 PDF BRITISH STANDARD AEROSPACE SERIES BS EN 2591 321 1998 Elements of electrical and optical connection — Test methods — Part 321 Damp heat, cyclic test The European Standard EN 2591 321 1997[.]
BRITISH STANDARD AEROSPACE SERIES Elements of electrical and optical connection — Test methods — Part 321: Damp heat, cyclic test The European Standard EN 2591-321:1997 has the status of a British Standard ICS 49.060 BS EN 2591-321:1998 BS EN 2591-321:1998 National foreword This British Standard is the English language version of EN 2591-321:1997 The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACE/6/3, Aerospace connectors, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European 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 subcommittee can be obtained on request to its secretary Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications 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 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 of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1998 © BSI 04-1999 ISBN 580 29475 Amendments issued since publication Amd No Date Comments BS EN 2591-321:1998 Contents National foreword Foreword Text of EN 2591-321 © BSI 04-1999 Page Inside front cover i ii blank EUROPEAN STANDARD EN 2591-321 NORME EUROPÉENNE October 1997 EUROPÄISCHE NORM ICS 49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test English version Aerospace series — Elements of electrical and optical connection — Test methods — Part 321: Damp heat, cyclic test Série aérospatiale — Organes de connexion électrique et optique — Méthodes d’essais — Partie 321: Chaleur humide, essai cyclique Luft- und Raumfahrt — Elektrische und optische Verbindungselemente — Prüfverfahren — Teil 321: Feuchte Wärme, zyklische Prüfung This European Standard was approved by CEN on 22 June 1997 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 2591-321:1997 E EN 2591-321:1997 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA) After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France., Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom Contents Foreword Scope Normative references Preparation of specimens Apparatus Method Figure Page 3 3 © BSI 04-1999 EN 2591-321:1997 Scope This standard specifies a method (cyclic test) of assessing the ability of elements of connection to function under conditions of damp heat It shall be used together with EN 2591 This method forms part of test EN 2591-302 Normative references This European Standard incorporates by dated or undated reference provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies EN 2591, Aerospace series — Elements of electrical and optical connection — Test methods — General EN 2591-101, Aerospace series — Elements of electrical and optical connection — Test methods — Part 101: Visual examination EN 2591-206, Aerospace series — Elements of electrical and optical connection — Test methods — Part 206: Measurement of insulation resistance EN 2591-302, Aerospace series — Elements of electrical and optical connection — Test methods — Part 302: Climatic sequence1) EN 2591-408, Aerospace series — Elements of electrical and optical connection — Test methods — Part 408: Mating and unmating forces1) Preparation of specimens 3.1 Specimens shall be prepared according to the technical specification Cable ends shall be allowed through the test chamber or sealed 3.2 Unless specified in the technical specification, the following details shall be stated: — specimens mated or unmated and fitted with protective covers; — mounting method, type of cable and definition of wiring of specimens; — number of cycles: or 10; — type of preconditioning; — initial measurements (if applicable); — final measurements and requirements (if applicable); — method according to EN 2591-206 and insulation resistance value; 1) — method according to EN 2591-408 and values of mating and unmating forces Apparatus The test chamber shall be designed so that its temperature and relative humidity are controlled Damp air shall be circulated within the test chamber Condensed water from chamber walls or ceiling shall not drip on the specimens Method 5.1 Preconditioning The specimens shall be preconditioned for at least h as specified 5.2 Initial measurements (if applicable) They shall be carried out as specified 5.3 Procedure The specimens shall be placed in the test chamber as specified The procedure shall consist of the following-phases: — Phase 1: within h, the temperature of the test chamber shall be raised to (65 ± 3) °C and the relative humidity increased to 95 +2 –3 % — Phase 2: the above conditions shall be maintained for h — Phase 3: within 16 h the temperature shall be progressively reduced to 38 +4 °C, while the relative humidity is maintained as high as possible and shall not decrease below 85 % These three phases (see Figure 1) constitute one cycle The number of cycles to be carried out shall be as specified 5.4 Final measurements and requirements (if applicable) Immediately after the last cycle, (unless otherwise specified), the specimens shall be subjected to the following test sequence: — EN 2591-206: at ambient temperature; — EN 2591-408; — EN 2591-101: visual examination with inspection for corrosion points Published as AECMA Prestandard at the date of publication of this standard © BSI 04-1999 EN 2591-321:1997 Figure © BSI 04-1999 blank BS EN 2591-321:1998 BSI — British Standards Institution BSI is the independent national body responsible for 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