EN 60068-2-27:2009
(Main)Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
IEC 60068-2-27 provides a standard procedure for determining the ability of a specimen to withstand specified severities of non-repetitive or repetitive shocks. The purpose of this test is to reveal mechanical weakness and/or degradation in specified performances, or accumulated damage or degradation caused by shocks. In conjunction with the relevant specification, this may be used in some cases to determine the structural integrity of specimens or as a means of quality control. This test is primarily intended for unpackaged specimens and for items in their transport case when the latter may be considered to be part of the specimen. If an item is to be tested unpackaged, it is referred to as a test specimen. However, if the item is packaged, then the item itself is referred to as a product and the item and its packaging together are referred to as a test specimen. When used in conjunction with IEC 60068-2-47, this standard may be used for testing packaged products. This possibility was included in the 2005 version of IEC 60068-2-47 for the first time. This standard is written in terms of prescribed pulse shapes. Guidance for the selection and application of these pulses is given in Annex A and the characteristics of the different pulse shapes are discussed in Annex B. Wherever possible, the test severity and the shape of the shock pulse applied to the specimen should be such as to reproduce the effects of the actual transport or operational environment to which the specimen will be subjected, or to satisfy the design requirements if the object of the test is to assess structural integrity (see Clauses A.2 and A.4). For the purposes of this test, the specimen is always mounted to the fixture or the table of the shock testing machine during testing. The major changes with regard to the previous edition concern: - the merging of IEC 60068-2-29 into this edition of IEC 60068-2-27; Part 2-29 will be withdrawn as soon as this edition is published; - the introduction of soft packaged specimens as defined in the IEC ad hoc working group document agreed in Stockholm:2000. Has the status of a basic safety publication according to IEC Guide 104.
Umgebungseinflüsse - Teil 2-27: Prüfverfahren - Prüfung Ea und Leitfaden: Schocken
Essais d'environnement - Partie 2-27: Essais - Essai Ea et guide: Chocs
CEI 60068-2-27 fournit un mode opératoire normalisé pour déterminer l'aptitude d'un spécimen à supporter des chocs répétitifs ou non répétitifs de sévérités spécifiées. Le but de cet essai est de mettre en évidence une défaillance mécanique et/ou une dégradation des performances spécifiées, ou les dommages ou dégradations cumulés dus aux chocs. Il peut aussi être utilisé dans certains cas, conjointement à la spécification particulière, pour déterminer la robustesse de structure des spécimens ou comme essai d'assurance de la qualité. Cet essai est en premier lieu destiné aux spécimens non emballés et aux éléments placés dans leur coffret de transport lorsque ce dernier peut être considéré comme faisant partie du spécimen. Si un élément est à soumettre aux essais en étant non emballé, il est désigné comme un spécimen d'essai. Cependant, si l'élément est emballé, alors il est lui-même désigné comme produit et l'élément et son emballage sont désignés comme spécimen d'essai. Lorsque cette norme est utilisée conjointement avec la CEI 60068 2 47, elle peut être utilisée pour l'essai des produits emballés. Cette possibilité a été incluse dans la version de 2005 pour la première fois. La rédaction de cette norme s'appuie sur des formes d'impulsions prescrites. Un guide pour la sélection et l'application de ces impulsions est donné à l'Annexe A et les caractéristiques des différentes formes d'impulsion sont exposées à l'Annexe B. Chaque fois que possible, il convient que la sévérité d'essai et la forme de l'impulsion de choc appliquée au spécimen soient telles qu'elles reproduisent les effets du transport ou des conditions d'environnement réels auxquels le spécimen sera soumis ou qu'elles correspondent aux exigences de la conception si l'objet de l'essai est d'estimer la robustesse de structure (voir Articles A.2 et A.4). Pour les besoins de cet essai, le spécimen est toujours monté sur le bâti de fixation ou sur la table de la machine d'essai au choc pendant l'épreuve. Les modifications principales par rapport à l'édition précédente sont les suivantes: - la fusion de la CEI 60068-2-29 dans la présente édition de la CEI 60068-2-27; la Partie 2-29 sera supprimée dès que cette édition sera publiée; - l'introduction de spécimens dans emballages mous comme définis dans le document du groupe de travail ad hoc de la CEI conclu à Stockholm en 2000. A le statut d'une publication fondamentale de sécurité conformément au Guide 104 de la CEI.
Okoljsko preskušanje - 2-27. del: Preskusi - Preskus Ea in vodilo: Udarec
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2009
1DGRPHãþD
SIST EN 60068-2-27:2001
SIST EN 60068-2-29:2001
Okoljsko preskušanje - 2-27. del: Preskusi - Preskus Ea in vodilo: Udarec
Environmental testing -- Part 2-27: Tests - Test Ea and guidance: Shock
Umgebungseinflüsse - Teil 2-27: Prüfverfahren - Prüfung Ea und Leitfaden: Schocken
Essais d'environnement -- Partie 2-27: Essais - Essai Ea et guide: Chocs
Ta slovenski standard je istoveten z: EN 60068-2-27:2009
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60068-2-27
NORME EUROPÉENNE
May 2009
EUROPÄISCHE NORM
ICS 19.040 Supersedes EN 60068-2-27:1993 and EN 60068-2-29:1993
English version
Environmental testing -
Part 2-27: Tests -
Test Ea and guidance: Shock
(IEC 60068-2-27:2008)
Essais d'environnement - Umgebungseinflüsse -
Partie 2-27: Essais - Teil 2-27: Prüfverfahren -
Essai Ea et guide: Chocs Prüfung Ea und Leitfaden: Schocken
(CEI 60068-2-27:2008) (IEC 60068-2-27:2008)
This European Standard was approved by CENELEC on 2009-04-22. 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 standards 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 notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60068-2-27:2009 E
Foreword
The text of document 104/448/FDIS, future edition 4 of IEC 60068-2-27, prepared by IEC TC 104,
Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC parallel
vote and was approved by CENELEC as EN 60068-2-27 on 2009-04-22.
This European Standard supersedes EN 60068-2-27:1993 and EN 60068-2-29:1993.
The major technical changes with regard to EN 60068-2-27:1993 concern:
– the merging of EN 60068-2-29:1993 into this Part 2-27;
– the introduction of soft packaged specimens as defined in the IEC ad hoc working group document
agreed in Stockholm:2000.
This standard is to be used in conjunction with EN 60068-1.
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) 2010-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60068-2-27:2008 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 indicated:
IEC 60068-2-31 NOTE Harmonized as EN 60068-2-31:2008 (not modified).
IEC 60068-2-81 NOTE Harmonized as EN 60068-2-81:2003 (not modified).
ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025:2005 (not modified).
__________
– 3 – EN 60068-2-27:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60068-1 - Environmental testing - EN 60068-1 1994
Part 1: General and guidance
IEC 60068-2-47 2005 Environmental testing - EN 60068-2-47 2005
Part 2-47: Tests - Mounting of specimens
for vibration, impact and similar dynamic tests
1) 2)
IEC 60068-2-55 - Environmental testing - EN 60068-2-55 1993
Part 2-55: Tests - Test Ee and guidance:
Bounce
1) 2)
IEC 60721-3-1 - Classification of environmental conditions - EN 60721-3-1 1997
Part 3: Classification of groups of
environmental parameters and their
severities -
Section 1: Storage
1) 2)
IEC 60721-3-5 - Classification of environmental conditions - EN 60721-3-5 1997
Part 3: Classification of groups of
environmental parameters and their
severities -
Section 5: Ground vehicle installations
1)
IEC Guide 104 - The preparation of safety publications – –
and the use of basic safety publications
and group safety publications
1)
Undated reference.
2)
Valid edition at date of issue.
IEC 60068-2-27
Edition 4.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-27: Tests – Test Ea and guidance: Shock
Essais d'environnement –
Partie 2-27: Essais – Essai Ea et guide: Chocs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 19.040 ISBN 2-8318-9628-2
– 2 – 60068-2-27 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references.7
3 Terms and definitions .8
4 Description of test apparatus .9
4.1 Required characteristics .9
4.2 Measuring system.11
4.3 Mounting .12
5 Severities .13
6 Preconditioning.14
7 Initial measurements and functional performance test .15
8 Testing .15
9 Recovery .15
10 Final measurements .15
11 Information to be given in the relevant specification.15
12 Information to be given in the test report .16
Annex A (normative) Selection and application of pulse shapes – Guidance.17
Annex B (informative) Shock response spectra and other characteristics of pulse
shapes.27
Annex C (informative) Comparison between impact tests.36
Bibliography .37
Figure 1 – Pulse shape and limits of tolerance for half-sine pulse .10
Figure 2 – Pulse shape and limits of tolerance for final-peak saw-tooth pulse.10
Figure 3 – Pulse shape and limits of tolerance for trapezoidal pulse.11
Figure 4 – Frequency characteristics of the overall measuring system .12
Figure A.1 – Shock response spectrum of a symmetrical half-sine pulse.19
Figure A.2 – Shock response spectrum of a final-peak saw-tooth pulse .20
Figure A.3 – Shock response spectrum of a symmetrical trapezoidal pulse .21
Figure B.1 – Framework or box containing oscillatory systems of which f , f and f are
1 2 3
examples of resonance frequencies .27
Figure B.2a – Exciting pulse.29
Figure B.2b – Responses for f , f and f .29
1 2 3
Figure B.2c – Spectra which result from an infinite number of frequencies, with f , f and
1 2
f shown as finite points on the continuous curves.29
Figure B.2 – Shock response spectrum concept .29
Figure B.3 – Framework containing damped multi-degree-of-freedom system .31
Figure B.4 – Shock response spectrum of a half-sine pulse with ripple.33
60068-2-27 © IEC:2008 – 3 –
Figure B.5 – Spectrum of a final-peak saw-tooth 300 m/s , 18 ms pulse compared with
the spectra of 200 m/s half-sine pulses with durations between 3 ms and 20 ms .35
Table 1 – Severities for shock testing .14
Table A.1 – Examples of pulse shapes and test severities typically employed for various
applications.23
Table A.2 – Examples of severities typically employed for various applications .24
– 4 – 60068-2-27 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-27: Tests – Test Ea and guidance: Shock
FOREWORD
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