EN 60068-2-40-1999 en Environmental Testing Part 2 Tests - Test Z AM Combined Cold Low Air Pressure Tests《环境试验 第2部分 试验 试验Z AM 低温 低气压综合试验 替代HD 323 2 40 S1-1988 IEC 60068-2-40-1976 +.pdf
《EN 60068-2-40-1999 en Environmental Testing Part 2 Tests - Test Z AM Combined Cold Low Air Pressure Tests《环境试验 第2部分 试验 试验Z AM 低温 低气压综合试验 替代HD 323 2 40 S1-1988 IEC 60068-2-40-1976 +.pdf》由会员分享,可在线阅读,更多相关《EN 60068-2-40-1999 en Environmental Testing Part 2 Tests - Test Z AM Combined Cold Low Air Pressure Tests《环境试验 第2部分 试验 试验Z AM 低温 低气压综合试验 替代HD 323 2 40 S1-1988 IEC 60068-2-40-1976 +.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD Environmental testing - Part 2: Tests - Test Z/ANI: Combined cold/ow air pressure tests The European Standam British Standard EN 60068 401999 has the status of a ICs 19.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 60068-2-40:2000 EC i0068-2-40:197
2、6 STDoBSI BS EN bOOb-2-YO-ENGL 2000 m LbZrlbb9 08352Y2 8T5 m BS EN 60068-2-402000 been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 2000 Amd. No. 0 BSI 4-2ooO ISBN O 580 34051 1 N
3、ational foreword Da Comments This British Standard is the official Engsh language version of EN 60068-2-40 1999. It BS 2011-2.1z/AM:1977 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEY104, Environmental conditions, classification and testing, whic
4、h has the responsibility to: is identical with IEC 60068-2-40: 1976 plus amendment 1: 1983. It supersedes - 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 interests inform
5、ed; - monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its %crew. Flom 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 h
6、as 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 identiers from both system. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists nonnative r
7、eferences to international publications with their correspondmg European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by using
8、 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 f
9、rom legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copynght notice displayed in this document indicates when the document was last issued. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM E
10、N 60068-2-40 November 1999 ICs 19.040 Supersedes HD 323.2.40 S1:1988 English version Environmental testing Part 2: Tests - Test Z/AM: Combined coldllow air pressure tests (IEC 60068-2-40: 1976 + AI : 1983) Essais denvironnement Umweltprfungen Partie 2: Essais - Essai Z/AM: Essais combins froid/basse
11、 pression atmosphrique Luftdruck Teil 2: Prfungen - Prfung Z/AM: Kombinierte Prfung - Klte/Niedriger (CE1 60068-2-40: 7 976 + Al 1983) (IEC 60068-2-40: 1 976 + A 1 1 983) This European Standard was approved by CENELEC on 1999-1 0-01. CENELEC members are bound to comply with the CENICENELEC Internal
12、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 CENELEC member
13、. 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 CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC m
14、embers are 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 Stand
15、ardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassari 35, B - 1050 Brussels 1999 CENELEC - Ali rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No, EN 60068-2-40
16、:1999 E STDoBSI BS EN b0068-2-VO-ENGL 2000 = Lb24bb7 0835244 678 Page 2 EN 60068-2-40: 1 999 Foreword The text of the International Standard IEC 60068-2-40: 1 976 and its amendment 1 : 1 983, prepared by IEC TC 50 (transformed into IEC TC 104 “Environmental conditions, classification and methods of
17、test“), was approved by CENELEC as HD 323.2.40 SI on 1988-03-01. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN 60068-2-40 on 1999-1 0-01. The following date was fixed: - latest date by which the EN has to be imp
18、lemented at national level by publication of an identical national standard or by endorsement (dp) 2000- 1 0-0 1 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the Intern
19、ational Standard IEC 60068-2-40: 1 976 and its amendment 1 : 1 983 was approved by CENELEC as a European Standard without any modification. . STD-BSI BS EN bOObA-2-40-ENGL 2000 Lb24bb 0835245 504 = Page 3 EN 60068-2-40:1999 CONTENTS Clause Introduction . 1 . 1 General . 1.2 Low air pressure . 1.3 Te
20、mperature . 1.4 Related documents Object . General description Description of test apparatus “ 4.1 Test chamber . 4.2 Mounting . Severities 5.1 General . 5.2 Preconditioning . Initial measurements ._. Conditioning 8.1 General . 8.2 Procedure for heat-dissipating specimen without artificial cooling o
21、f the specimen and for non-heat-dissipating specimen . 8.3 Precautions when testing specimens with artificial cooling . Intermediate measurements . Preferred combinations of temperature, air pressure and duration . 10 Recovery . 11 Final measurements . 12 Information to be given in the relevant spec
22、ification Figures . Annex ZA(normative) Normative references to international publications with corresponding European publications Page 4 4 4 4 4 5 5 5 5 5 5 5 6 6 6 6 6 6 7 8 8 8 8 9 their 11 OBSI 04-2000 STD-BSI BS EN 60068-2-40-ENGL 2000 = I1624669 083524b 440 Page 4 EN 60068-2-40: 1999 BASIC EN
23、VIRONMENTAL TESTING PROCEDURES - Part 2: Tests - Test Z/AM: Combined coldllow air pressure tests 1 Introduction 1.1 General This publication deals with combined cold (with gradual (or rapid) change of temperature) and low air pressure tests for both heat-dissipating and non-heat-dissipating specimen
24、s. (see Sub-clauses 8.2.2 and 8.2.8). The object of the test is to determine the ability of components or equipment or other articles to be stored and used under a simultaneous combination of low temperature and low air pressure. This combined test should normally be used only if the effects of comb
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