EN 60068-2-74-1999 en Environmental Testing Part 2 Tests - Test Xc Fluid Contamination《环境试验 第2部分 试验 试验Xc 流体污染IEC 60068-2-74-1999》.pdf
《EN 60068-2-74-1999 en Environmental Testing Part 2 Tests - Test Xc Fluid Contamination《环境试验 第2部分 试验 试验Xc 流体污染IEC 60068-2-74-1999》.pdf》由会员分享,可在线阅读,更多相关《EN 60068-2-74-1999 en Environmental Testing Part 2 Tests - Test Xc Fluid Contamination《环境试验 第2部分 试验 试验Xc 流体污染IEC 60068-2-74-1999》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD Environmental testing - BS EN 60068-2- 74: 2 O00 IEC 60068-2-74:1999 Part 2: Tests - I Wst Xc : Fluid contamination The European Standard EN 600682-74 1999 has the status of a British Standard ICs 19.040 I NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BS
2、I BS EN bb8-2-74-ENGL 2000 - Lb24bb9 0830370 074 BS EN 60068-2-742000 direction of the Electroterhnical Amd. No. D - present to the responsible intedonaYEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related internationa
3、l and European developments and promulgate them in the UK A lis of organizations represented on this committee can be obtained on request to its secretary. Flom 1 January 1997, ail IEC publications have the number 6O added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1.
4、 For a period of time during the change over from one numbering system to the other, publications may contain idenQfiers from both systems. Cross-references Attention is dram to the fact that CEN and CENELEC Standads normally include an annex which lists normative references to international publica
5、tions with their corresponding European publications. The British Standards which implement these international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Intemational Standards Correspondence Index“, or by using the
6、“Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contsact. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
7、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copynght notice displayed in this document indicates when the document was last issued. O BSI 03-2 I I ISBN O 580 35719 8 STDmBSI BS EN hOOhB-2-
8、74-ENGL 2000 Lb24hh7 0830373 T20 M EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60068-2-74 October 1999 ICs 19.040 English version Environmental testing Part 2: Tests - Test Xc: Fluid contamination (IEC 60068-2-74: 1 999) Essais denvironnement Partie 2: Essais - Essai Xc: Contamination par d
9、es fluides (CE1 60068-2-74: 1 999) Umweltprfungen Teil 2: Prfverfahren - Prfung Xc: Verunreinigung durch Flssigkeiten (IEC 60068-2-74: 1999) This European Standard was approved by CENELEC on 1999-1 0-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate th
10、e 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. This European Standard exist
11、s 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 members are the national electr
12、otechnical 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 Standardization Comit Europen de No
13、rmalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Centrai Secretariat: rue de Stassart 35, B - 1050 Brussels - 1999 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-74:1999 E - STDoBSI ES EN bOOb
14、8-2-74-ENGL 2DDO 1b24bb9 0830372 9b7 = Page 2 EN 60068-2-74: 1 999 Foreword The text of document 104/124/FDIS, future edition 1 of IEC 60068-2-74, prepared by IEC TC 104 Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC parallel vote and was approved by C
15、ENELEC as EN 60068-2-74 on 1999-10-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement with the EN have to be withdrawn - latest date by which the national standards conflicting (
16、dopl 2000-07-01 (daw) 2002-1 0-01 Endorsement notice The text of the International Standard IEC 60068-2-74:1999 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bDOb8-2-74-ENGL 2000 Lb24bb7 0830373 8T3 9 Page 3 EN 60068-2-74:1999 CONTENTS Page Clause 1 2 3 4 5 6
17、 7 8 9 Scope 4 Normative references . 4 Test fluid . 4 3.1 Specification of test fluid . 4 3.2 Precaution 4 Specimen 6 Cleaning 6 5.1 Initial cleaning 6 5.2 intermediate cleaning . 6 5.3 Final cleaning . 6 Initial examination 6 . 6 Occasional contamination (class A) 7 Intermittent contamination (cla
18、ss 8) . 7 10 Extended contamination (class C) 8 11 Final examination 8 12 Information to be given in the relevant specification . 8 Annex A (informative) Guidance on the choice of test fluids and specimens 9 Q BSJ w-mo STD-BSI BS EN bOOb8-2-74-ENGL 2000 m Lb24669 0830374 73T m Page 4 EN 60068-2-74:1
19、999 ENVIRONMENTAL TESTING - Part 2: Tests - Test Xc: Fluid contamination 1 Scope This part of IEC 60068 gives a method of test which provides a standard procedure to determine the ability of components, equipments or their constituent materials, hereinafter referred to as specimen, to withstand acci
20、dental contact with fluids, without being unacceptably affected. The fluids listed in this part of IEC 60068 are representative of those commonly encountered in operational applications. It is not intended that a specimen should be exposed to all, or even any of them. Nor is the list intended to be
21、complete; fluids not listed and for which a test is appropriate should be included in the relevant specification. Guidance is given in annex A on the choice of test fluids, specimens and severities. These tests are not intended to demonstrate the suitability of components or equipments to perform in
22、 continuous contact with a fluid, e.g. an immersed fuel pump. Nor are they a test to demonstrate immunity from electrolytic corrosion. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60068. F
23、or dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60068 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For un
24、dated references, the latest edition of the normative document referred to applies. Members of JEC and IS0 maintain registers of currently valid International Standards. IS0 181 7: 1985, Rubber, vulcanized - Determination of the effect of liquids 3 Test fluid 3.1 Specification of test fluid The rele
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