SIST EN 60068-2-55:2013

SLOVENSKI STANDARD
SIST EN 60068-2-55:2013
01-julij-2013
2NROMVNRSUHVNXãDQMHGHO3UHVNXVL3UHVNXV(HLQQDYRGLOR3UHVNXãDQMH
QHSULWUMHQHJDWRYRUDYNOMXþQRVSUHPHWDYDQMHP
Environmental testing - Part 2-55: Tests - Test Ee and guidance: Loose cargo testing
including Bounce
Umgebungseinflüsse - Teil 2-55: Prüfverfahren - Prüfung Ee und Leitfaden: Prüfung
loser Packstücke einschließlich Prellen
Ta slovenski standard je istoveten z: EN 60068-2-55:2013
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN 60068-2-55:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 60068-2-55:2013

---------------------- Page: 2 ----------------------

SIST EN 60068-2-55:2013

EUROPEAN STANDARD
EN 60068-2-55

NORME EUROPÉENNE
May 2013
EUROPÄISCHE NORM

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
(IEC 60068-2-55:2013)


Essais d’environnement -  Umgebungseinflüsse -
Partie 2-55: Essais - Teil 2-55: Prüfverfahren -
Essai Ee et guide - Prüfung Ee und Leitfaden: Prüfung loser
Essais de chargement sans arrimage y Packstücke einschließlich Prellen
compris l’essai de rebondissement (IEC 60068-2-55:2013)
(CEI 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 and 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 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, Estonia, 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60068-2-55:2013 E

---------------------- Page: 3 ----------------------

SIST EN 60068-2-55:2013
EN 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 dates are fixed:
• latest date by which the document has (dop) 2013-12-13
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-03-13
• latest date by which the national
standards conflicting with the

document have to be withdrawn

This document 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 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 the 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 European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60068-2-27 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/IEC 17025 NOTE  Harmonized as EN ISO/IEC 17025.

---------------------- Page: 4 ----------------------

SIST 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 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 (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60068-1 - Environmental testing - EN 60068-1 -
Part 1: General and guidance


IEC 60068-2-6 - Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)


IEC 60068-2-64 - Environmental testing - EN 60068-2-64 -
Part 2-64: Tests - Test Fh: Vibration,
broadband random and guidance


IEC 60068-2-80 - Environmental testing - EN 60068-2-80 -
Part 2-80: Tests - Test Fi: Vibration - Mixed
mode


ISO 13355 - Packaging - Complete, filled transport EN ISO 13355 -
packages and unit loads - Vertical random
vibration test


ASTM D4169-09 - Standard Practice for Performance Testing of - -
Shipping Containers and Systems

---------------------- Page: 5 ----------------------

SIST EN 60068-2-55:2013

---------------------- Page: 6 ----------------------

SIST EN 60068-2-55:2013



IEC 60068-2-55

®


Edition 2.0 2013-02




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE




BASIC SAFETY PUBLICATION

PUBLICATION FONDAMENTALE DE SÉCURITÉ




Environmental testing –

Part 2-55: Tests – Test Ee and guidance – Loose cargo testing including bounce




Essais d’environnement –

Partie 2-55: Essais – Essai Ee et guide – Essais de chargement sans arrimage y

compris l’essai de rebondissement















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX R


ICS 19.040; 29.020 ISBN 978-2-83220-644-7



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 7 ----------------------

SIST EN 60068-2-55:2013
– 2 – 60068-2-55 © IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements for the test apparatus . 7
4.1 General test 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 Severity 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 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 – Basic drive motion of a mechanical bounce tester . 14


Table B.1 – Comparison of different impact tests . 17

---------------------- Page: 8 ----------------------

SIST EN 60068-2-55:2013
60068-2-55 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ENVIRONMENTAL TESTING –

Part 2-55: Tests – Test Ee and guidance –
Loose cargo testing including bounce

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical 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 Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international 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 order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability 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 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 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 60068-2-55 has been prepared by IEC technical committee 104:
Environmental conditions, classification and methods of test.
This second edition cancels and replaces the first edition, published in 1987, and constitutes
a technical revision.
The main changes with respect to the previous edition are listed below:
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 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.

---------------------- Page: 9 ----------------------

SIST EN 60068-2-55:2013
– 4 – 60068-2-55 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
104/592/FDIS 104/598/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 Guide 104.
This standard should be used in conjunction with IEC 60068-1.
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 stability date indicated on the IEC web site under "http://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.

---------------------- Page: 10 ----------------------

SIST EN 60068-2-55:2013
60068-2-55 © 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 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 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 writers will find a list of details to be considered for inclusion in
specifications and, in Annex A, the necessary accompanying guidance.

---------------------- Page: 11 ----------------------

SIST 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 IEC 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 case 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 Normative 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) applies.
1
IEC 60068-1, Environmental testing – Part 1: General and guidance
IEC 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 – 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, 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.
___________
1
A new edition of IEC 60068-1 is currently under consideration.

---------------------- Page: 12 ----------------------

SIST EN 60068-2-55:2013
60068-2-55 © 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 point
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
g
n
standard acceleration due to the earth's gravity, which itself varies with altitude and
geographical latitude
Note 1 to entry: For the purposes of this standard, the value of g is rounded up to the nearest whole number,
n
2
that is 10 m/s .
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 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 shall 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 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 appropriate 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 loaded 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 bouncing 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-synchronous (A.3.2)
motion of the platform.

---------------------- Page: 13 ----------------------

SIST 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° in 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 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 resulting 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 Mounting
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.
A suitable barrier arrangement is described in Clause A.2 and shown in Figure A.1.
5 Severities
NOTE Severity is described by the motion of the platform and the testing duration.
5.1 Severity for sinusoidal motion of the platform
If sinusoidal vibration is required, the relevant specification should refer to IEC 60068-2-6 and
prescribe the amplitude and frequency of the motion together with the testing duration.
The duration of testing shall be selected from the severities given below. These severities
represent the nominal duration of testing, exclusive of recovery periods (see Clause 8), to be
applied. The test duration depends on the specimen and the purpose of the test:
– 180 min;
–  90 min;
–  60 min;
–  15 min;
–   5 min.
The duration of testing shall be divided equally between the specified attitudes or as required
by the relevant specification, see Clause 8.

---------------------- Page: 14 ----------------------

SIST EN 60068-2-55:2013
60068-2-55 © IEC:2013 – 9 –
The following values are often applied:
Sinusoidal motion of the platform according to IEC 60068-2-6, peak displacement amplitude
of 12,75 mm ±0,5 mm at a frequency of 4,75 Hz ±0,05 Hz. This is equivalent to a peak
acceleration amplitude of approximately 1,1 g . A typical test duration for robustness testing
n
of shipping containers is 60 min.
NOTE The test severity given here corresponds to widely used test procedures. However, it is considered as very
conservative and not related to the operational or transportation environment.
5.2 Severity for random motion of the platform
If random vibration is required, the relevant specification should refer to IEC 60068-2-64 and
prescribe the ASD spectrum of the motion together with the test duration.
The duration of testing shall be divided equally between the specified attitudes or as required
by the relevant specification, see Clause 8.
5.3 Severity for mixed mode motion of the platform
If mixed mode vibration is required, the relevant specification should refer to IEC 60068-2-80
and prescribe the mixed mode spectrum of the motion together with the test duration.
NOTE 1 Mixed mode produces a stochastic bouncing of packaged specimens. Digital vibration control systems
require long loop times at these low frequencies and it may be some time before the test starts and equalization is
achieved.
NOTE 2 Bouncing motion generated with a pure random or pure sine vibration is unsuitable for reproducing the
motion required for unfixed packaged specimens.
5.4 Severity for use of special bounce testing machines
If the relevant specification requires use of a special bounce testing machine (see Clause A.3),

the kind of motion and the testing duration shall be specified.
6 Preconditioning
If the relevant specification calls for preconditioning it shall then prescribe the conditions.
7 Initial measurements and functional performance test
The specimen shall be submitted to visual, dimensional, functional and any other checks as
prescribed by the relevant specification.
8 Testing
The specimen, with or without its transport case or packaging as required by the relevant
specification, is placed in the middle of the platform without being fixed.
A vibration test is carried out with an excitation as prescribed by the test severity (see
Clause 5).
One or several points on the platform not reached by the bouncing specimen is/are chosen as
reference points. If necessary, multi-point control may be used, provided that this is stated in
the test report. However, it is only expected to use multi-point control for very large, heavy
equipment. In that case, the reference points shall be located on each side of the specimen
on the platform. No additional check points are required.

---------------------- Page: 15 ----------------------

SIST EN 60068-2-55:2013
– 10 – 60068-2-55 © IEC:2013
In case of sinusoidal motion of the platform, IEC 60068-2-6 applies, in case of random motion,
IEC 60068-2-64 applies. The requirements of the respective standards shall be fulfilled for the
reference points on the platform.
NOTE 1 The vibration testing standards IEC 60068-2-6 and IEC 60068-2-64 impose additional uniformity
requirements on multiple check points that are not applicable for bounce tests according to this standard.
The test may be interrupted for inspection of the specimen, or to prevent excessive
temperature rises, provided that the testing duration is properly achieved.
NOTE 2 Excessive temperature rises may occur in specimens which contain highly resilient structures or parts,
except possibly for the severity of 5 min. In such cases it may be necessary, in order to prevent an excessive
temperature rise within the specimen, to carry out the test in a series of phases (each of, say, 5 min bouncing
followed by a recovery period of 5 min or longer) as required by the relevant specification.
If pre-tests are necessary for adjustment of the testing machine, this time shall not be
deducted from the test duration.
Where the aspect ratio of the specimen (the ratio of its longest side to its shortest) does not
exceed 3:1 and the mass does not exceed 50 kg, the specimen shall be subjected to bounce
on each of its attitudes (for example the two bases and the lateral surface for a cylinder and
six sides for a rectangular (parallelepipedal) object).
F
...