BS EN 60068-2-47-2005 Environmental testing - Part 2-47 Tests - Mounting of specimens for vibration impact and similar dynamic tests《环境试验 试验 振动、冲击和类似动态试验用试样的安装》.pdf

1、BRITISH STANDARD BS EN 60068- 2-47:2005 Environmental testing Part 2-47: Tests Mounting of specimens for vibration, impact and similar dynamic tests The European Standard EN 60068-2-47:2005 has the status of a British Standard ICS 19.040 BS EN 60068-2-47:2005 This British Standard was published unde

2、r the authority of the Standards Policy and Strategy Committee on 13 October 2005 BSI 13 October 2005 ISBN 0 580 46448 2 National foreword This British Standard is the official English language version of EN 60068-2-47:2005. It is identical with IEC 60068-2-47:2005. It supersedes BS EN 60068-2-47:20

3、00 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/104, Environmental conditions, classification and testing, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross

4、-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of B

5、ritish Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre

6、sent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an ins

7、ide front cover, the EN title page, pages 2 to 36, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60068-2-47 NORME EUROPENNE EUROPIS

8、CHE NORM June 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by

9、any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-47:2005 E ICS 19.040 Supersedes EN 60068-2-47:1999English version Environmental testing Part 2-47: Tests - Mounting of specimens for vibration, impact and similar dynamic tests (IEC 60068-2-47:2005) Essais denvironnment Partie 2-4

10、7: Essais Fixation de spcimens pour essais de vibrations, dimpacts et autres essais dynamiques (CEI 60068-2-47:2005) Umgebungseinflsse Teil 2-47: Prfverfahren Befestigung von Prflingen zur Schwing-, Sto- und hnlichen dynamischen Prfungen (IEC 60068-2-47:2005) This European Standard was approved by C

11、ENELEC on 2005-05-01. CENELEC 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 stan

12、dards may be obtained on application to the Central Secretariat or to any CENELEC 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 CENELEC member into its own language and not

13、ified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg

14、, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 60068-2-47:2005 - 2 - Foreword The text of document 104/359/FDIS, future edition 3 of IEC 60068-2-47, prepared by IEC TC 104, Environmental conditions, classification and methods of

15、test, was submitted to the IEC/CENELEC parallel vote and was approved by CENELEC as EN 60068-2-47 on 2005-05-01. This European Standard supersedes EN 60068-2-47:1999 + corrigendum June 2000. The major technical changes with regard to EN 60068-2-47:1999 are related to specific guidance on the testing

16、 of packaged products. 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 (dop) 2006-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow

17、) 2008-05-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60068-2-47:2005 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards

18、indicated: IEC 60068-2-6 NOTE Harmonized as EN 60068-2-6:1995 (not modified). IEC 60068-2-7 NOTE Harmonized as EN 60068-2-7:1993 (not modified). IEC 60068-2-21 NOTE Harmonized as EN 60068-2-21:1999 (not modified). IEC 60068-2-27 NOTE Harmonized as EN 60068-2-27:1993 (not modified). IEC 60068-2-29 NO

19、TE Harmonized as EN 60068-2-29:1993 (not modified). IEC 60068-2-31 NOTE Harmonized as EN 60068-2-31:1993 (not modified). IEC 60068-2-32 NOTE Harmonized as EN 60068-2-32:1993 (not modified). IEC 60068-2-57 NOTE Harmonized as EN 60068-2-57:2000 (not modified). IEC 60068-2-59 NOTE Harmonized as EN 6006

20、8-2-59:1993 (not modified). IEC 60068-2-64 NOTE Harmonized as EN 60068-2-64:1994 (not modified). IEC 60068-2-65 NOTE Harmonized as EN 60068-2-65:1994 (not modified). IEC 60068-2-75 NOTE Harmonized as EN 60068-2-75:1997 (not modified). IEC 60068-2-81 NOTE Harmonized as EN 60068-2-81:2003 (not modifie

21、d). _ 3 EN 60068-2-47:2005 CONTENTS 1 Scope 5 2 Normative references .5 3 Terms and definitions .5 4 General5 5 Mounting, where the specimen is a component .6 6 Mounting, where the specimen is equipment and other articles .6 7 Mounting, where the specimen is a packaged product.7 8 Information to be

22、given in the relevant specification 8 Annex A (informative) General guidance 14 Annex B (informative) Guidance on packaged products21 Annex C (informative) Response of a single degree of freedom (SDOF) system to a half-sine shock pulse29 Annex ZA (normative) Normative references to international pub

23、lications with their corresponding European publications .34 Figure 1 Examples of obvious means of mounting components.9 Figure 2 Examples of mounting of components by the leads only10 Figure 3 Examples of mounting of components by the body only 11 Figure 4 Examples of mounting of components by the

24、body and the leads 12 Figure 5 Examples of mounting of electronic cabinets 13 Figure B.1 Generalized transmissibility factors for packaging materials 25 Figure C.1 Typical characteristics of half sine pulse .31 Figure C.2 Typical single degree of freedom (SDOF) transmissibility characteristics.31 Fi

25、gure C.3 Peak Acceleration Responses SRS.32 Figure C.4 Relative Amplitude of Secondary Response Peaks33 Figure C.5 Notation of Response Characteristics .33 blank 5 EN 60068-2-47:2005 ENVIRONMENTAL TESTING Part 2-47: Tests Mounting of specimens for vibration, impact and similar dynamic tests 1 Scope

26、This part of IEC 60068 provides methods for mounting products, whether packaged or unpackaged, as well as mounting requirements for equipment and other articles, for the series of dynamic tests in IEC 60068-2, that is impact (Test E), vibration (Test F) and acceleration, steady-state (Test G). When

27、they are fastened to the test apparatus and subjected to these tests, whether packaged or unpackaged, they are referred to as specimens. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl

28、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1:1988, Environmental testing Part 1: General and guidance IEC 60068-2-55:1987, Environmental testing Part 2-55: Tests Test Ee and guidance: Bounce ISO 2041:1990, Vibration and sh

29、ock Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions used in ISO 2041 and IEC 60068-1 apply. 3.1 package result of the packing operation, consisting of the packaging and its contents, for example, electronic devices prepared for transport 3.2 packaging

30、product made of any material of any nature to be used for the containment, protection, handling and delivery, for example, a corrugated fibreboard box 4 General The relevant specification shall state whether the effect of gravitational force is important. If so, the specimen shall be mounted in such

31、 a way that the gravitational force acts in the same direction as it would in use. Where the effect of gravitational force is not important, the specimen may be mounted in any attitude. EN 60068-2-47:2005 6 If significant for the test results, the relevant specification shall also state a) the tempe

32、rature limits within which the specimen shall be tested, b) the maximum level of magnetic interference which may be imposed on the specimen and/or the orientation of the specimen in relation to the direction of the magnetic field (for example, near an electrodynamic vibration generator), c) the rela

33、tive humidity limits within which the specimen shall be tested. 5 Mounting, where the specimen is a component The mounting method to be used shall be as stated in the relevant specification. Where the method of mounting is not specified but is obvious from the design, as in Figure 1, this method sha

34、ll be used. Where it is not obvious, the mounting methods shall, whenever possible, be chosen in accordance with the principles shown in Figures 2, 3 or 4, bearing in mind whether the intention is to load dynamically the leads and/or the body or to determine the internal robustness. When the specime

35、n is to be tested with additional leads attached, these shall be so arranged that they impose similar restraint and mass to those when the specimen is used in its normal manner. In all cases, components shall be fastened to a rigid test fixture or directly to the mounting surface of the test apparat

36、us. The most common failure mode for electronic components as shown in Figures 1, 2 and 3 is not failure of the component itself but of the solder connection due to flexure of the printed circuit board. Testing of the complete printed circuit board is essential. NOTE A “rigid test fixture“ is one wh

37、ere there are no resonances within the test range or where the requirements of the test tolerances can be met at all fixing points. 6 Mounting, where the specimen is equipment and other articles The specimen shall be mechanically connected to the mounting surface of the test apparatus either directl

38、y or by means of a rigid test fixture (see note above), as shown in Figure 5, or as stated in the relevant specification. NOTE In the case of acoustically induced vibration, the mounting technique is quite different and reference should be made to IEC 60068-2-65. In cases where the normal mounting s

39、tructure for the equipment is available, the relevant specification shall state if it shall be used (see also Clause A.2). Any additional stays or straps shall be avoided. Any connections to the specimen such as cables, pipes, etc. shall be so arranged that they impose similar restraint and mass to

40、those when the specimen is installed in its operational position. In order to achieve this, it may be necessary to fasten the cables, pipes, etc., to the fixture. The relevant specification shall specify the size, mounting torque and associated tolerance of the fixing bolts. 7 EN 60068-2-47:2005 Spe

41、cimens intended for use with isolators shall normally be tested with their isolators. If it is not practicable to carry out the test with the appropriate isolators, the specimen may be tested without the isolators at a different severity, as stated in the relevant specification. The relevant specifi

42、cation may require an additional test on a specimen with the external isolators removed or blocked, in order to demonstrate that minimum acceptable structural resistance has been achieved. In this case, the severity to be applied shall be given in the relevant specification. Where, operationally, an

43、y heating effect on the isolators is likely to be of significance, this shall be taken into account during testing. 7 Mounting, where the specimen is a packaged product All the relevant requirements in Clauses 5 and 6 above shall be met. Generally, in order to reproduce the effects of the transporta

44、tion phase, a product, if normally packaged for that phase, shall be tested in its packaging. However, there are a number of situations to consider, as follows: 7.1 Packaging available (see also Clause B.2) Unless otherwise stated in the relevant specification, the packaging, if available, shall be

45、used during the testing. If the method of fastening the packaged product to a transportation vehicle is known, that method shall, where practicable, be replicated and details of this shall be specified in the relevant specification and stated in the test report. The relevant specification shall spec

46、ify the size, mounting torque and associated tolerance of the fixing bolts. If the specimen is capable of being fastened to a transportation vehicle in a number of known ways then, from engineering knowledge of the dynamic behaviour of the product, the worst case(s) shall be selected so that faults

47、are most likely to be revealed. Where the specimen is fastened to a transportation vehicle but the method varies in an unpredictable way, it shall be mechanically connected to the test apparatus as detailed in the relevant specification. This may be in a manner which only engineering judgement can d

48、ecide and shall be based upon faults considered most likely to be revealed. If the specimen is intended, or is likely, to be carried in a transportation vehicle without being fastened down, or with some degree of freedom, it shall be tested in accordance with IEC 60068-2-55. See also B.4.3. If the p

49、ackaged product is intended to be fastened to a transportation vehicle but it is considered likely that, in practice, it might not be fastened down, the relevant specification may require the test method stated in the previous paragraph to be applied. This may be in addition to the appropriate test where the product is fastened down.