Bsi bs en 02591 321 1998

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 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 has the status of a

British Standard

ICS 49.060

BS EN 2591-321:1998

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 0 580 29475 7

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 2 to 4 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

Amendments issued since publication

BS EN 2591-321:1998

Contents

Page

ii blank

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE 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: 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

© 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 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

Page

EN 2591-321:1997

1 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

2 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)

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 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: 2 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;

— method according to EN 2591-408 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 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 least 1 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 2 h, 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 6 h

— Phase 3: within 16 h the temperature shall be progressively reduced to °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

1) Published as AECMA Prestandard at the date of publication of this standard

95+2 –3

38+4 0

EN 2591-321:1997

Figure 1

blank

BS EN

2591-321:1998

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