Environmental testing - Part 2-13: Tests - Test M: Low air pressure

IEC 60068-2-13:2021 specifies methods of test applicable to specimens which, during transportation, storage or in service, can be subjected to low air pressure.
This fifth edition cancels and replaces the fourth edition, published in 1983. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with recently revised parts of IEC 60068-2;
b) Clause 5: severities aligned with IEC 60721-2-3 and IEC 60721-3 (all parts);
c) addition of Annex A (guidance on selecting the duration of exposure).

Essais d'environnement - Partie 2-13: Essais - Essai M: Basse pression atmosphérique

L'IEC 60068-2-13:2021 fournit les méthodes d'essai applicables aux spécimens qui peuvent être soumis à une pression atmosphérique basse pendant le transport, le stockage ou en service.
Cette cinquième édition annule et remplace la quatrième édition parue en 1983. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) alignement sur les normes IEC 60068-2 révisées récemment;
b) Article 5: alignement des sévérités sur l'IEC 60721-2-3 et sur I’IEC 60721-3 (toutes les parties);
c) ajout de l'Annexe A (recommandations quant au choix de la durée d'exposition).

General Information

Status
Published
Publication Date
02-Mar-2021
Current Stage
PPUB - Publication issued
Completion Date
03-Mar-2021
Ref Project

Buy Standard

Standard
IEC 60068-2-13:2021 - Environmental testing - Part 2-13: Tests - Test M: Low air pressure
English and French language
21 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 60068-2-13
Edition 5.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-13: Tests – Test M: Low air pressure
Essais d'environnement –
Partie 2-13: Essais – Essai M: Basse pression atmosphérique
IEC 60068-2-13:2021-03(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

variety of criteria (reference number, text, technical publications previews. With a subscription you will always

committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.

and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC online collection - oc.iec.ch

webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez

La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un

en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour

comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 60068-2-13
Edition 5.0 2021-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-13: Tests – Test M: Low air pressure
Essais d'environnement –
Partie 2-13: Essais – Essai M: Basse pression atmosphérique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-9481-9

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: 3 ----------------------
– 2 – IEC 60068-2-13:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 Test description ............................................................................................................... 5

4.1 General ................................................................................................................... 5

4.2 Description of test apparatus .................................................................................. 5

5 Test procedures .............................................................................................................. 6

5.1 Severities ................................................................................................................ 6

5.1.1 General ........................................................................................................... 6

5.1.2 Air pressure ..................................................................................................... 6

5.1.3 Duration of exposure ....................................................................................... 6

5.2 Preconditioning ....................................................................................................... 7

5.3 Initial measurements ............................................................................................... 7

5.4 Conditioning ............................................................................................................ 7

5.5 Recovery ................................................................................................................ 7

5.6 Final measurements ................................................................................................ 7

6 Information to be given in the relevant specification ......................................................... 7

7 Information to be given in the test report.......................................................................... 8

Annex A (informative) Guidance on selecting the duration of exposure .................................. 9

Bibliography .......................................................................................................................... 10

Table 1 – Air pressure and altitude ......................................................................................... 6

---------------------- Page: 4 ----------------------
IEC 60068-2-13:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-13: Tests – Test M: Low air pressure
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.

IEC 60068-2-13 has been prepared by IEC technical committee 104: Environmental conditions,

classification, and methods of test. It is an International Standard.

This fifth edition cancels and replaces the fourth edition, published in 1983. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) alignment with recently revised parts of IEC 60068-2;
b) Clause 5: severities aligned with IEC 60721-2-3 and IEC 60721-3 (all parts);
c) addition of Annex A (guidance on selecting the duration of exposure).
---------------------- Page: 5 ----------------------
– 4 – IEC 60068-2-13:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
104/889/FDIS 104/893/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 60068 series, published under the general title Environmental

testing, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60068-2-13:2021 © IEC 2021 – 5 –
ENVIRONMENTAL TESTING –
Part 2-13: Tests – Test M: Low air pressure
1 Scope

This part of IEC 60068 specifies methods of test applicable to specimens which, during

transportation, storage or in service, can be subjected to low air pressure.

The object of the low air pressure test is to determine the ability of components, equipment or

other articles to be used, transported or stored at low air pressure.

Components, equipment or other articles to be used, transported or stored under a

simultaneous combination of high or low temperature and low air pressure, where the

combination is important for the stresses imposed on the articles or for the failure mechanisms,

are then tested in accordance with IEC 60068-2-39.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 60068-1, Environmental testing – Part 1: General and guidance
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Test description
4.1 General

The specimen is introduced into the test chamber, the chamber air pressure is then reduced to

the appropriate value specified in the relevant specification.
These conditions are maintained for the specified duration.
4.2 Description of test apparatus

The test chamber shall be capable of maintaining the air pressure conditions given in Clause 5.

Care should be taken to avoid air contamination by ancillary equipment and devices and by the

air introduced when pressure is restored to normal.
---------------------- Page: 7 ----------------------
– 6 – IEC 60068-2-13:2021 © IEC 2021

When heat-dissipating specimens are tested, the relevant specification may call for

requirements applicable to the test chamber in accordance with test Bd or test Be of

IEC 60068‑2‑2.
5 Test procedures
5.1 Severities
5.1.1 General

The test severities, in terms of air pressure and duration of exposure, shall be specified in the

relevant specification. The values of air pressure should preferably be selected from those given

in 5.1.2 and 5.1.3.
5.1.2 Air pressure

The test air pressure shall be specified in the relevant specification and should preferably be

selected from Table 1. Further air pressure values according to standard atmosphere, are found

in ISO 2533.
Table 1 – Air pressure and altitude
Air pressure Approximate altitude above
sea level
(kPa) (m)
5,5 20 000
12 15 000
26 10 000
38 7 500
54 5 000
62 4 000
70 3 000
75 2 500
1 500
Sea level
0
The relation between air pressure and altitude are
calculated from IEC 60721-2-3.
Applicable when it is required to test specimen at
the lower limit of the air pressure value of the
standard atmospheric conditions for testing.
Altitudes up to 1 000 m are covered by the standard
air pressure of 86 kPa to 106 kPa, in accordance
with IEC 60068-1.
5.1.3 Duration of exposure

The test duration shall be specified in the relevant specification and should preferably be

selected from one of the following durations. Guidance on selecting an appropriate duration is

provided in Annex A.
– 5 min;
– 30 min;
– 2 h;
– 4 h;
– 16 h.
---------------------- Page: 8 ----------------------
IEC 60068-2-13:2021 © IEC 2021 – 7 –
5.2 Preconditioning

If required by the relevant specification, preconditioning shall be undertaken in accordance with

the requirements of the relevant specification.
5.3 Initial measurements

The specimen shall be visually inspected and electrically and mechanically checked as required

by the relevant specification.
5.4 Conditioning

It shall be possible to maintain the air pressures in Table 1, or as specified in the relevant

specification, in the chamber with a tolerance of ±5 % or ±0,1 kPa whichever is the larger. The

tolerance on the 84 kPa severity shall be ±2 kPa.

At the start and throughout the test, the test chamber shall be within the required temperature

range specified by the standard atmospheric conditions for testing according to IEC 60068-1.

The specimen shall be introduced into the chamber in an orientation, configuration and

operational state as specified in the relevant specification.

The pressure within the chamber shall then be reduced to the value appropriate to the severity.

The relevant specification may limit the rate of change of pressure to not more than 15 kPa/min

when considered necessary.

If required by the relevant specification, the specimen shall be operated and/or function in

accordance with the procedures set out in the relevant specification. For heat-dissipating

specimens, the relevant specification may require the specimen temperature to be stabilized

before any functional checks and/or measurements are made.

If required by the relevant specification, intermediate measurements shall be performed.

The air pressure shall be maintained for the specified duration.

The air pressure shall be restored to normal. If required by the relevant specification, the rate

of change of air pressure shall not exceed 15 kPa/min.
5.5 Recovery

The specimen, if not otherwise specified in the relevant specification, shall remain under

standard atmospheric conditions before final measurements for not less than 1 h but not more

than 2 h.
5.6 Final measurements

The specimen shall be visually inspected and electrically and mechanically checked as required

by the relevant specification.
6 Information to be given in the relevant specification

When this test is included in the relevant specification, the following details shall be given as

far as they are applicable:
a) type of test;
b) preconditioning;
c) initial measurements;
---------------------- Page: 9 ----------------------
– 8 – IEC 60068-2-13:2021 © IEC 2021
d) state of specimen during conditioning;
e) orientation of the specimen;
f) severity: pressure and duration of exposure;
g) limitation to be applied to rate of change of pressure;
h) measurements and/or loading during the conditioning;
i) recovery;
j) final measurements.
7 Information to be given in the test report
As a minimum the test report shall show the following information:
1) customer (name and address);
2) test laboratory (name and address and details of
accreditation - if any);
3) test dates
4) type of test (M);
5) purpose of test (development, qualification etc.);
6) test standard, edition (IEC 60068-2-13, edition);
7) relevant laboratory test procedure (code and issue);
8) test specimen description (unique ID, drawing, photo, quantity
build status, etc.);
9) test chamber identity (manufacturer, model number, unique
ID, etc.);
10) performance of test apparatus (set point temperature control, air flow
etc.);
11) uncertainties of measuring system;
12) calibration data (last and next due date);
13) initial, intermediate and final measurements;
14) required severities (from relevant specification);
15) orientation of the test specimens (from relevant specification);
16) test severities (measur
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.