1、 IEC 60068-2-31 Edition 2.0 2008-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Environmental testing Part 2-31: Tests Test Ec: Rough handling shocks, primarily for equipment-type specimens Essais denvironnement Partie 2-31: Essais Essai Ec: Choc li des manutentions brutales, essai destin en premier
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16、es commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60068-2-31 Edition 2.0 2008-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Environmental testing Part 2-31: Tests
17、 Test Ec: Rough handling shocks, primarily for equipment-type specimens Essais denvironnement Partie 2-31: Essais Essai Ec: Choc li des manutentions brutales, essai destin en premier lieu aux matriels INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE P ICS 19.040 P
18、RICE CODE CODE PRIX ISBN 2-8318-9794-7 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SCURIT 2 60068-2-31 IEC:2008 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 General description of test6 4 Initial measurements 8 5 Testing .8 5.1 Drop and topple.8 5.1.1 Description 8 5.1.2 Test F
19、acility.8 5.1.3 Testing procedures8 5.2 Free fall Procedure 19 5.2.1 Description 9 5.2.2 Test Facility.9 5.2.3 Test severity9 5.2.4 Testing procedures9 5.3 Free fall repeated Procedure 2 .10 5.3.1 Description 10 5.3.2 Test facility10 5.3.3 Test severity10 5.3.4 Testing procedure10 6 Final measuremen
20、ts .10 7 Information to be included in the relevant specification.11 7.1 Drop and topple test11 7.2 Free fall and free fall repeated tests 11 8 Information to be given in the test report 11 Annex A (normative) Test apparatus for repeated free fall test Procedure 213 Annex B (informative) Selection o
21、f test severities for free fall tests Guidance .15 Figure 1 Dropping on to a face.7 Figure 2 Dropping on to a corner .7 Figure 3 Topple (or push over).7 Figure A.1 Rotating (or tumbling) barrel .14 Table 1 Fall heights versus mass.9 Table B.1 Examples of typical test severities .16 60068-2-31 IEC:20
22、08 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ENVIRONMENTAL TESTING Part 2-31: Tests Test Ec: Rough handling shocks, primarily for equipment-type specimens FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national elect
23、rotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specific
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27、ternational use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In
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29、 clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability
30、 shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including
31、 legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this
32、 publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60068-2-31 has been prepared by IEC technical comm
33、ittee 104: Environmental conditions, classification and methods of test. This second edition cancels and replaces the first edition, published in 1969 and constitutes a technical revision. The major changes with regard to the previous edition concern the introduction of soft packaging tests, where a
34、ppropriate. This new edition of IEC 60068-2-31 now incorporates the second edition of IEC 60068-2-32 (1975). IEC 60068-2-32 will be withdrawn once this standard has been issued. 4 60068-2-31 IEC:2008 The text of this standard is based on the following documents: FDIS Report on voting 104/458/FDIS 10
35、4/462/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. It has the status of a basic safety publication in accordance with IEC Gu
36、ide 104. A list of all the parts in the IEC 60068 series, under the general title Environmental testing, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:
37、/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60068-2-31 IEC:2008 5 ENVIRONMENTAL TESTING Part 2-31: Tests Test Ec: Rough handling shocks, primarily for equipment-type specim
38、ens 1 Scope This part of IEC 60068 deals with a test procedure for simulating the effects of rough handling shocks, primarily in equipment-type specimens, the effects of knocks, jolts and falls which may be received during repair work or rough handling in operational use. This procedure does not sim
39、ulate the effects of impacts received during transportation as loosely constrained cargo. Where the effects of loose cargo transportation are to be assessed, test Ee: Bounce should be used. Also this procedure does not simulate the effects of shock applied to installed equipments. Where this effect
40、is to be assessed refer to test Ea: Shock. Testing should only be specified for equipment likely to receive such rough handling, for example those of small to medium size and mass, and should only be applied to those faces and corners where there is a risk of such treatment being encountered. In gen
41、eral, equipment which is frequently handled and serviced (for example field equipment and unit spares) can be considered at risk, whereas equipment forming an integral part of a permanent installation would not normally be considered at risk and need not be tested. Testing may not be applicable to f
42、ragile unprotected equipment of irregular shape (for example aircraft nose radar) which, when removed from the installation would be contained in a handling frame or jig. It may however be applicable to these items of equipment when they are in their transit case or in their handling frame or jig. F
43、or equipment which stands only on one face (for example the normal base) the test is generally only applied to that face. Shock tests are performed on the specimen when fixed to the test machine. Drop and topple, free fall, repeated free fall and bounce tests are performed with the specimen free. 2
44、Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-27, Environmenta
45、l testing Part 2-27: Tests Test Ea and guidance: Shock IEC 60068-2-55:1987, Environmental testing Part 2-55: Tests Test Ee and guidance: Bounce IEC Guide 104,The preparation of safety publications and the use of basic safety publications and group safety publications ISO 48:2007, Rubber, vulcanized
46、or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) 6 60068-2-31 IEC:2008 ISO 4180-2:1980, Complete, filled transport packages General rules for the compilation of performance test schedules Part 2: Quantitative data 3 General description of test Rough handling shocks
47、can be simulated by one or more of the following tests: a) Drop and topple A simple test intended to assess the effects of knocks or jolts likely to be received primarily by equipment-type specimens during repair work or rough handling on a table or bench. b) Free fall Procedure 1 A simple test to a
48、ssess the effects of falls likely to be experienced due to rough handling. It is also suitable to demonstrate a degree of robustness. c) Free fall Procedure 2 A test that additionally simulates repetitive shocks likely to be received by certain component-type specimens, for example connectors in ser
49、vice. The topple test need not be applied to specimens which have dimensions which make them stable whilst being handled. Reference to points 1) and 2) below should be made for information on the “c g ratio” and “height ratio” to establish if the test is necessary. The falling or topple actions produced by the test procedures given in 5.1.3.1, 5.1.3.2 and 5.1.3.3 are illustrat
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