EN 2591-309-1997 en Aerospace Series - Elements of Electrical and Optical Connection - Test Methods - Part 309 Dry Heat《航空航天系列 光电连接元件的试验方法 第309部分 干热》.pdf

《EN 2591-309-1997 en Aerospace Series - Elements of Electrical and Optical Connection - Test Methods - Part 309 Dry Heat《航空航天系列 光电连接元件的试验方法 第309部分 干热》.pdf》由会员分享，可在线阅读，更多相关《EN 2591-309-1997 en Aerospace Series - Elements of Electrical and Optical Connection - Test Methods - Part 309 Dry Heat《航空航天系列 光电连接元件的试验方法 第309部分 干热》.pdf（7页珍藏版）》请在麦多课文档分享上搜索。

1、STD.BS1 BS EN 257L-30-ENGL 177 Lb24bb Ub7397 273 BRITISH STANDARD AEROSPACE SERIES Elements of electrical and optical connection - Test methods Part 309. Dry heat The European Standard EN 2591309 : 1997 has the status of a British Standard ICs 49.060 NO COPYING WITHOUT ES1 PERMISSION EXCEPT AS PERMI

2、TTED BY COPYRIGHT LAW BS EN 2591309 : 1998 STD*BSI BS EN 2591-309-ENGL A998 = Lb24bb9 Ob73980 T95 direction of the Engineering AmdNo. Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1998 BS EN 2591309 : 1998 Date Text affected National forew

3、ord This British Standard is the English language version of EN 2591309 : 1997. The UK participation in its preparation was entnstd by Technical Committee ACW6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACW6/3, Aerospace connectors, which has the responsibility to: -

4、aid enquirem to understand the text; - present to the responsible internationaLEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interesls iIlfOX.lnd, - monitor related international and European developments and promulgate them in the UK. A list of org

5、anizations represented on this commit mounting method, type of cable and definition of wiring of specimen; type of preconditioning (if applicable); initial measurements (if applicable); severity (see 5.3); final measurements and requirements; measurement method according to EN 2591 -206 and insulati

6、on resistance value. 4 Apparatus The test chamber shall be designed so that the temperature is controlled by sensing devices located at those locations where the specimens are installed. The absolute humidity shall not exceed 20 g of water vapour per cubic metre of air (.e. approximately 50 % relati

7、ve humidity at 35 OC). When the test is carried out at a temperature lower than 35 OC, the relative humidity shall not exceed 50 %. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 EN 2591 -308: 1997 5 Method 5.1 Preconditioning Preconditioning shall take at least

8、 1 h unless otherwise specified. If required, the specimens shall be mated and unmated the specified number of times before testing, 5.2 Initial measurements (if applicable) They shall be carried out as specified. 5.3 Severity The severity, defined by the temperature and exposure time, shall be sele

9、cted from those listed below. 5.3.1 Temperature - (350f5) OC - (260*5) oc - (200I.2) OC - (i7512) OC - (155f2) OC - (125i2) OC - (85f2) OC 5.3.2 Exposure time 16h 5.4 Procedure When the test chamber is at the temperature corresponding to the specified severity, the specimens shall be introduced and

10、connected to the measuring instruments. Exposure time shall be calculated from the moment the chamber has reached thermal stability. I 5.5 Final measurements and requirements On completion of exposure time, while the specimens are still at the high temperature and within 1 h, the insulation resistan

11、ce shall be measured (EN 2591-206). Its value shall not be less than that specified. STD.BS1 BS EN 2571-39-ENGL 1778 I-Lb24bb7 Ob73985 577 BS EN 2591-309 : 1998 BSI 389 Chiswick High Road London w4 4AL %SI - British Standards Institution SI is the independent national body responsible for preparing

12、British Standards. It resents the UK view on standards in Europe and at the international level. It is icorporated by Royal Charter. lontract requirements British Standard does not purport to include all the necessary provisions of a ontract. Users of British Standards are responsible for their corr

13、ect application. Yevisions iritish Standards are updated by amendment or revision. Users of British Standards houid make sure that they possess the latest amendments or editions. I is the constant aim of BSI to improve the quality of our products and services. We rould be grateful if anyone finding

14、an inaccuracy or ambiguity while using this iritish Standard would inform the Secretary of the responsible technical committee, ie identity of which can be found on the inside front cover. Tek 0181 996 9000; Fax: 181 996 7400. LSI offers members an individual updating service called PLUS which ensur

15、es that ubscribers automatically receive the latest editions of standards. buying standards Irders for all BSI, international and foreign standards publications should be .ddressed to Customer Services, Sales Department at Chiswick Tel: 0181 996 7000; ax: O181 996 7001. n response to orders for inte

16、rnationai standards, it is BSI policy to supply the BSI mplemenbtion of those that have been published as British Standards, unless Itherwise requested. nformation on standards 3SI provides a wide range of information on national, European and international ltruidards through its Library, the Standa

17、rdline Database, the BSI Information ?echology Service (BITS) and its Technical Help to Exporters Service. Contact the nformation Department at Chiswick Tel 0181 996 7111; Fax: 0181 996 7048. subscribing members of BSI are kept up to date with standards developments and eceive substantid discounts o

18、n the purchase price of standards. For details of hese and other benefits contact Customer Services, Membership at Chiswick re1 0181 996 7002; Fax: 0181 996 7001. Zopyright 3opyright subsists in ali BSI publications. BSI also holds the copyright, in the UK, of he publications of the international st

19、andardization bodies. Except as permitted mder the Copyright, Designs and Patents Act 1988 no extract may be reproduced, rtored in a relxieval system or transmitted in any form or by any means - electronic, ihotocopying, recording or otherwise - without prior written permission from BSI. lhs does no

20、t preclude the free use, in the course of implementing the standard, of iecessary details such as symbols, and size, type or grade designations. If these ietais are to be used for any other purpose than implementation then the prior mitten permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Deu and advice can be obtained from the Copyright Manager, BSI, 389 Chiswick High Road, London W4 4AL.