1、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 EN2591-321:1997 has the status of a British Standard ICS 49.060BSEN 2591-321:1998 This British Standard, having been prepared under
2、the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15January1998 BSI 04-1999 ISBN 0 580 29475 7 National foreword This British Standard is the English language version of EN 2591-321:1997. The UK participation in its preparati
3、on 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
4、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
5、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 f
6、ound 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 Standa
7、rds 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, theENtitle page, pages2to4 and a back cover. This standard h
8、as been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN 2591-321:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Forewo
9、rd 2 Text of EN 2591-321 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-321 October 1997 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:
10、 Damp heat, cyclic test Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 321: Chaleur humide, essai cyclique Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 321: Feuchte Wrme, zyklische Prfung This European Standard was approved by
11、CEN on 22June1997. 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 m
12、ay 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 Ce
13、ntral 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 King
14、dom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr 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 2591-321:19
15、97 EEN 2591-321:1997 BSI 04-1999 2 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 Associa
16、tions 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 April1998, and conflicting national standards sh
17、all be withdrawn at the latest by April1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France., Germany, Greece, Iceland, Ireland
18、, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens 3 4 Apparatus 3 5 Method 3 Figure 1 4EN 2591-321:1997 BSI 04-1999 3 1 Scope This standard specifies a method (
19、cyclic test) of assessing the ability of elements of connection to function under conditions of damp heat. It shall be used together with EN2591. This method forms part of test EN2591-302. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other
20、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 re
21、vision. 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 examinatio
22、n. 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 sequence 1) . EN 2591-408, Aerospace series Elements
23、 of electrical and optical connection Test methods Part 408: Mating and unmating forces 1) . 3 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 spec
24、ification, 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: 2 or 10; type of preconditioning; initial measurements (if applicable); final measurements and requi
25、rements (if applicable); method according to EN2591-206 and insulation resistance value; method according to EN2591-408 and values of mating and unmating forces. 4 Apparatus The test chamber shall be designed so that its temperature and relative humidity are controlled. Damp air shall be circulated
26、within the test chamber. Condensed water from chamber walls or ceiling shall not drip on the specimens. 5 Method 5.1 Preconditioning The specimens shall be preconditioned for at least1h as specified. 5.2 Initial measurements (if applicable) They shall be carried out as specified. 5.3 Procedure The s
27、pecimens shall be placed in the test chamber as specified. The procedure shall consist of the following-phases: Phase 1: within 2h, the temperature of the test chamber shall be raised to (65 3) C and the relative humidity increased to%. Phase 2: the above conditions shall be maintained for 6h. Phase
28、 3: within 16 h the temperature shall be progressively reduced toC, while the relative humidity is maintained as high as possible and shall not decrease below 85%. These three phases (seeFigure 1) constitute one cycle. The number of cycles to be carried out shall be as specified. 5.4 Final measureme
29、nts 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. 1) Published a
30、s AECMA Prestandard at the date of publication of this standard 95 +2 3 38 +4 0EN 2591-321:1997 4 BSI 04-1999 Figure 1 5 blankBS EN 2591-321:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. I
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