1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationEnvironmental testingPart 2-55: Tests Test Ee and guidance Loose cargo testing including bounceBS EN 60068-2-55:2013National forewordThis British Standard is the UK implementatio
2、n of EN 60068-2-55:2013. It isidentical to IEC 60068-2-55:2013. It supersedes BS EN 60068-2-55:1993which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeGEL/104, Environmental conditions, classification and testing.A list of organizations represented on this
3、committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct applica-tion. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 70518 2 ICS
4、19.040; 29.020Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2013.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN 60068-2-55:2
5、013EUROPEAN STANDARD EN 60068-2-55 NORME EUROPENNE EUROPISCHE NORM May 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CEN
6、ELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-55:2013 E ICS 19.040; 29.020 Supersedes EN 60068-2-55:1993 English version Environmental testing - Part 2-55: Tests - Test Ee and guidance - Loose cargo testing including bounce
7、 (IEC 60068-2-55:2013) Essais denvironnement - Partie 2-55: Essais - Essai Ee et guide - Essais de chargement sans arrimage y compris lessai de rebondissement (CEI 60068-2-55:2013) Umgebungseinflsse - Teil 2-55: Prfverfahren - Prfung Ee und Leitfaden: Prfung loser Packstcke einschlielich Prellen (IE
8、C 60068-2-55:2013) This European Standard was approved by CENELEC on 2013-03-13. 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 a
9、nd bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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
10、 the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Esto
11、nia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60068-2-55:20
12、13EN 60068-2-55:2013 - 2 - Foreword The text of document 104/592/FDIS, future edition 2 of IEC 60068-2-55, prepared by IEC TC 104 “Environmental conditions, classification and methods of test“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60068-2-55:2013. The following
13、 dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-12-13 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-03-13 This documen
14、t supersedes EN 60068-2-55:1993. EN 60068-2-55:2013 includes the following significant technical changes with respect to EN 60068-2-55:1993: This new edition allows for loose cargo testing in a more general sense. The test is no longer aligned with a special testing machine but allows for use of any
15、 suitable equipment such as electrodynamic or servo-hydraulic shaker tables. Moreover, sinusoidal and random vibration can be used. The previous rotation table motions are included in Annex A as historical methods. This standard should be used in conjunction with EN 60068-1. Attention is drawn to th
16、e possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60068-2-55:2013 was approved by CENELEC as a Eur
17、opean Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60068-2-27 NOTE Harmonized as EN 60068-2-27. IEC 60068-2-31 NOTE Harmonized as EN 60068-2-31. IEC 60068-5-2 NOTE Harmonized as EN 60068-5-2. ISO/I
18、EC 17025 NOTE Harmonized as EN ISO/IEC 17025. BS EN 60068-2-55:2013- 3 - EN 60068-2-55:2013 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document
19、 and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (
20、mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60068-1 - Environmental testing - Part 1: General and guidance EN 60068-1 - IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) EN 60068-2-6 - IEC 60068-2-64 - Environmental testing - Part 2
21、-64: Tests - Test Fh: Vibration, broadband random and guidance EN 60068-2-64 - IEC 60068-2-80 - Environmental testing - Part 2-80: Tests - Test Fi: Vibration - Mixed mode EN 60068-2-80 - ISO 13355 - Packaging - Complete, filled transport packages and unit loads - Vertical random vibration test EN IS
22、O 13355 - ASTM D4169-09 - Standard Practice for Performance Testing of Shipping Containers and Systems - - BS EN 60068-2-55:2013 2 60068-2-55 IEC:2013 CONTENTS INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Requirements for the test apparatus . 7 4.1 General te
23、st description 7 4.2 Characteristics of the testing machine . 7 4.3 Motion of the platform 7 4.4 Tolerances on the horizontal accuracy of platform . 8 4.5 Control 8 4.6 Mounting . 8 4.7 Horizontal motion of specimen. 8 5 Severities . 8 5.1 Severity for sinusoidal motion of the platform 8 5.2 Severit
24、y for random motion of the platform 9 5.3 Severity for mixed mode motion of the platform . 9 5.4 Severity for use of special bounce testing machines 9 6 Preconditioning 9 7 Initial measurements and functional performance test 9 8 Testing . 9 9 Recovery 10 10 Final measurements . 10 11 Information to
25、 be given in the relevant specification 11 12 Information to be given in the test report 11 Annex A (normative) Guidance 12 Annex B (informative) Comparison amongst impact tests . 17 Bibliography 18 Figure A.1 Typical arrangement of barriers and typical reference point positions . 13 Figure A.2 Basi
26、c drive motion of a mechanical bounce tester . 14 Table B.1 Comparison of different impact tests 17 BS EN 60068-2-55:201360068-2-55 IEC:2013 5 INTRODUCTION This test is applicable to specimens which, during transportation on the load-carrying platform of wheeled vehicles either not fastened down or
27、with some degree of freedom, may be subjected to dynamic stresses resulting from random shock conditions (bounce). The test may also be used as a simple means of assessing the satisfactory design of a specimen so far as its structural integrity is concerned. NOTE In practice, this test is primarily
28、applicable to equipment-type specimens and packages. Although the test is performed using a vibrating platform, it is not considered as a vibration test, but as an impact test. Vibration tests should be conducted according to the appropriate standards from IEC 60068-2. In Clause 11, specification wr
29、iters will find a list of details to be considered for inclusion in specifications and, in Annex A, the necessary accompanying guidance. BS EN 60068-2-55:2013 6 60068-2-55 IEC:2013 ENVIRONMENTAL TESTING Part 2-55: Tests Test Ee and guidance Loose cargo testing including bounce 1 Scope This part of I
30、EC 60068 provides a standard procedure for determining the ability of a specimen to withstand specified severities of bounce, e. g. when transported as loose cargo on wheeled vehicles. This test is primarily intended for specimens prepared for transportation, including specimens in their transport c
31、ase when the latter may be considered as part of the specimen itself or packages. This test should not be used as a low-frequency vibration test. Although primarily intended for electrotechnical products, this standard is not restricted to them and may be used in other fields where desired. 2 Normat
32、ive references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) a
33、pplies. IEC 60068-1, Environmental testing Part 1: General and guidance1IEC 60068-2-6, Environmental testing Part 2-6: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-64, Environmental testing Part 2-64: Tests Test Fh: Vibration, broadband random and guidance IEC 60068-2-80, Environmental testing
34、Part 2-80: Tests Test Fi: Vibration Mixed mode ISO 13355, Packaging Complete, filled transport packages and unit loads Vertical random vibration test ASTM D4169-09, Standard Practice for Performance Testing of Shipping Containers and Systems 3 Terms and definitions For the purposes of this document,
35、 the following terms and definitions apply. 3.1 bounce testing machine testing machine with a vibrating platform driven by rotating shafts and eccentrics Note 1 to entry: Bounce testing machines typically have a fixed displacement amplitude and a variable frequency. _ 1A new edition of IEC 60068-1 i
36、s currently under consideration. BS EN 60068-2-55:201360068-2-55 IEC:2013 7 3.2 checkpoint point located on the vibration table Note 1 to entry: For the purpose of this standard, the checkpoints have to be located on the vibration table, regardless of the position of the specimen. 3.3 reference poin
37、t point, chosen from amongst the checkpoints, whose signal is used to control the test, such that the requirements of this standard are satisfied 3.4 gnstandard acceleration due to the earths gravity, which itself varies with altitude and geographical latitude Note 1 to entry: For the purposes of th
38、is standard, the value of gnis rounded up to the nearest whole number, that is 10 m/s2. 4 Requirements for the test apparatus 4.1 General test description The specimen is installed on a vibrating platform without a fixture and occasionally bounces, according to the mass and stiffness of the platform
39、 and the specimen, and the prescribed motion. No direct control is imposed on the specimen motion. Wherever possible, the test severity applied to the specimen shall be related to the operational environment to which the specimen will be subjected during transportation. The relevant specification sh
40、all state the criteria upon which the acceptance or rejection of the specimen is to be based. Normally, for this test the specimen is not functioning and it is sufficient that it should survive the testing. 4.2 Characteristics of the testing machine The testing machine shall consist of a horizontal
41、platform coupled to a shaker or a similar drive mechanism. If prescribed by the relevant specification, special bounce testing machines may be used (see Clause A.3). The platform shall be of at least 24 mm and not to exceed 32 mm plywood firmly attached to a suitable stiff frame, if required, with a
42、ppropriate barriers (see 4.7). It shall be of sufficient size to support the specimen. Furthermore, the characteristics of the testing machine shall allow for the prescribed motion of the platform, see 4.3. 4.3 Motion of the platform The motion of the platform shall be vertical linear, also when loa
43、ded by the specimen and any other devices necessary for conducting the test. A rotary motion of the platform is not possible when connected to a shaker table. The relevant specification can prescribe sinusoidal or random vibration of the platform. The deflections of the platform resulting from the b
44、ouncing specimen shall be negligible. This can be achieved by sufficient strength and stiffness of the supporting stiff frame. If prescribed by the relevant specification, other kinds of motion can be used that require special bounce testing machines, such as circulating (see A.3.1) or non-synchrono
45、us (A.3.2) motion of the platform. BS EN 60068-2-55:2013 8 60068-2-55 IEC:2013 4.4 Tolerances on the horizontal accuracy of platform The testing machine shall be installed so that at its lowest point (bottom dead centre of the motion), the platform is horizontal within the following tolerance: 0,5 i
46、n the longitudinal and lateral axes (respectively pitching and rolling angles). Any allowances for play of the drive mechanism are included in this value. 4.5 Control The motion of the platform is controlled. Acceleration or displacement control is permissible. If the platform is driven mechanically
47、 by eccentrics, actual eccentricity and control of the shaft speed may be used. It is not necessary to measure the response of the specimen. The impacts of the specimen on the platform are very likely to influence the actual motion of the platform. The occurrence of high-frequency oscillations resul
48、ting from these impacts shall be considered, as this may lead to signal distortion without appropriate filtering. In the case of the reference point being influenced by the impacting, and the stated tolerances not being able to be met, the achieved result shall be stated in the test report. 4.6 Moun
49、ting For the purpose of this test, the specimen is never fastened or otherwise fixed to the platform during testing. 4.7 Horizontal motion of specimen The horizontal motion of the specimen shall be limited by suitable barriers of sufficient strength and stiffness. The maximum horizontal clearance shall be small compared to the size of the specimen but large enough to allow for free vertical movement. Normally, this is achieved by a clearance of approximately 10 mm on each side.
