EN 60068-2-2:2007
(Main)Environmental testing - Part 2-2: Tests - Test B: Dry heat
Environmental testing - Part 2-2: Tests - Test B: Dry heat
Deals with dry heat tests applicable both to heat-dissipating and non heat-dissipating specimens. For non heat-dissipating specimens, Tests Bb and Bd do not deviate essentially from earlier issues. The object of the dry heat test is limited to the determination of the ability of components, equipment or other articles to be used, transported or stored at high temperature. These dry heat tests do not enable the ability of specimens to withstand or operate during the temperature variations to be assessed. In this case, it would be necessary to use IEC 60068-2-14 Test N: Change of temperature. The dry heat tests are subdivided as follows: Dry heat test for non heat-dissipating specimens - with gradual change of temperature, Bb. Dry heat tests for heat-dissipating specimens - with gradual change of temperature, Bd; - with gradual change of temperature, specimen powered throughout, Be. The procedures given in this standard are normally intended for specimens that achieve temperature stability during the performance of the test procedure. The main changes from the previous edition are as follows: Tests Ba and Bc have been deleted since they were more severe tests than Test Nb, IEC 60068-2-14: Change of temperature. Secondly it was considered justified to delete the 3 % value on the temperature difference between the chamber air and the wall temperatures. Thirdly it is proposed that the test specimen be powered throughout the test where required; and, finally, the annexes have been removed. Has the status of a basic safety publication in accordance with IEC Guide 104.
Umgebungseinflüsse - Teil 2-2: Prüfverfahren - Prüfung B: Trockene Wärme
Essais d'environnement - Partie 2-2: Essais - Essai B: Chaleur sèche
Traite des essais de chaleur sèche applicables à la fois aux spécimens dissipant de l'énergie et à ceux ne dissipant pas d'énergie. Les essais Bb et Bd destinés à des spécimens ne dissipant pas d'énergie ne présentent pas de modifications importantes par rapport aux éditions précédentes. Le but de l'essai de chaleur sèche se limite à la détermination de l'aptitude des composants, équipements ou autres articles à être utilisés, transportés ou stockés à haute température. Ces essais de chaleur sèche ne permettent pas de vérifier l'aptitude des spécimens à subir ou à fonctionner pendant les variations de température. Dans ce cas, il serait nécessaire d'utiliser l'essai N de la CEI 60068-2-14: Variations de température. Les essais de chaleur sèche se subdivisent de la façon suivante: Essai de chaleur sèche pour spécimens ne dissipant pas d'énergie - avec variation lente de la température, Bb. Essais de chaleur sèche pour spécimens dissipant de l'énergie - avec variation lente de la température, Bd; - avec variation lente de la température, pour les spécimens dissipant partout, Be. La procédure décrite dans cette norme est normalement prévue pour les spécimens qui atteignent la stabilité thermique pendant le déroulement de l'essai. Les principaux changements par rapport à l'édition précédente sont les suivants: Les essais Ba et Bc ont été retirés puisqu'ils étaient plus sévères que l'essai Nb de la CEI 60068 2 14: Variations de température. Deuxièmement, il a été considéré justifié de supprimer la valeur de 3 % sur la différence de température entre l'air de la chambre d'essai et les températures des parois. Troisièmement, il est proposé et non plus exigé que le spécimen d'essai soit mis en fonctionnement durant l'essai; et, pour finir, les annexes ont été retirées. A le statut d'une publication fondamentale de sécurité, conformément au Guide CEI 104
Okoljsko preskušanje - 2-2. del: Preskusi - Preskusi B: Suha vročina (IEC 60068-2-2:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2008
1DGRPHãþD
SIST EN 60068-2-2:2002 + A1:2002
2NROMVNRSUHVNXãDQMHGHO 3UHVNXVL3UHVNXVL% 6XKDYURþLQD ,(&
Environmental testing - Part 2-2: Tests - Tests B: Dry heat
Umgebungseinflüsse - Teil 2-2: Prüfverfahren - Prüfung B: Trockene Wärme
Essais d'environnement - Partie 2-2: Essais - Essai B: Chaleur seche
Ta slovenski standard je istoveten z: EN 60068-2-2:2007
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 60068-2-2
NORME EUROPÉENNE
September 2007
EUROPÄISCHE NORM
ICS 19.040 Supersedes EN 60068-2-2:1993 + A1:1993 + A2:1994
English version
Environmental testing -
Part 2-2: Tests -
Test B: Dry heat
(IEC 60068-2-2:2007)
Essais d'environnement - Umgebungseinflüsse -
Partie 2-2: Essais - Teil 2-2: Prüfverfahren -
Essai B: Chaleur sèche Prüfung B: Trockene Wärme
(CEI 60068-2-2:2007) (IEC 60068-2-2:2007)
This European Standard was approved by CENELEC on 2007-09-01. 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 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: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60068-2-2:2007 E
Foreword
The text of document 104/412/FDIS, future edition 5 of IEC 60068-2-2, 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 60068-2-2 on 2007-09-01.
This European Standard supersedes EN 60068-2-2:1993 + A1:1993 + A2:1994.
The main changes from EN 60068-2-2:1993 + A1:1993 + A2:1994 are as follows: Tests Ba and Bc have
been deleted since they were more severe tests than Test Nb, EN 60068-2-14: Change of temperature.
Secondly it was considered justified to delete the 3 % value on the temperature difference between the
chamber air and the wall temperatures. Thirdly it is proposed that the test specimen be powered
throughout the test where required; and, finally, the annexes have been removed.
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) 2008-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60068-2-2:2007 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60068-2-2:2007
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)
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
Part 1: General and guidance
2) 3)
IEC 60068-3-1 - Environmental testing - EN 60068-3-1 1999
Part 3: Background information -
Section One: Cold and dry heat tests
2) 3)
IEC 60068-3-5 - Environmental testing - EN 60068-3-5 2002
Part 3-5: Supporting documentation and
guidance - Confirmation of the performance
of temperature chambers
2) 3)
IEC 60068-3-7 - Environmental testing - EN 60068-3-7 2002
Part 3-7: Supporting documentation and
guidance - Measurements in temperature
chambers for tests A and B (with load)
2) 3)
IEC 60068-5-2 - Environmental testing - EN 60068-5-2 1999
Part 5: Guide to drafting of test methods -
Terms and definitions
IEC 60721 Series Classification of environmental conditions EN 60721 Series
1)
EN 60068-1 includes A1:1992 to IEC 60068-1 + corr. October 1988.
2)
Undated reference.
3)
Valid edition at date of issue.
IEC 60068-2-2
Edition 5.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-2: Tests – Test B: Dry heat
Essais d’environnement –
Partie 2-2: Essais – Essai B: Chaleur sèche
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 19.040 ISBN 2-8318-9229-5
– 2 – 60068-2-2 © IEC:2007
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Application of tests for non heat-dissipating specimens versus tests for heat-
dissipating specimens .8
4.1 General .8
4.2 Ascertaining high or low air velocity in the test chamber.8
4.3 Application of tests with sudden change of temperature versus tests with
gradual change of temperature.9
4.4 Testing of heat-dissipating specimens .9
4.5 Temperature monitoring .9
4.6 Packaging .9
4.7 Diagrammatic representations .9
5 Test descriptions .10
5.1 General .10
5.2 Test Bb: Dry heat for non heat-dissipating specimens with gradual change of
temperature.10
5.2.1 Object .10
5.2.2 General description .11
5.3 Test Bd: Dry heat for heat-dissipating specimens with gradual change of
temperature that are not powered during the conditioning period.11
5.3.1 Object .11
5.3.2 General description .11
5.3.3 Energising the specimen .11
5.4 Test Be: Dry heat for heat-dissipating specimens with gradual change of
temperature that are required to be powered throughout the test.11
5.4.1 Object .11
5.4.2 General description .12
6 Test procedure .12
6.1 Confirmation of performance .12
6.2 Working space .12
6.3 Thermal radiation .12
6.4 Mounting .13
6.5 Severities .13
6.5.1 General .13
6.5.2 Temperature.13
6.5.3 Duration .13
6.6 Preconditioning .13
6.7 Initial measurements .13
6.8 Conditioning .13
6.8.1 Steady state conditions .13
6.8.2 Absolute humidity .14
6.9 Intermediate measurements .14
6.10 Final temperature ramp .14
60068-2-2 © IEC:2007 – 3 –
6.11 Recovery.14
6.12 Specimen with artificial cooling.14
6.13 Final measurements .14
7 Information to be given in the relevant specification .15
8 Information to be given in the test report .15
Figure 1 – Block diagram Tests B: Dry Heat.10
– 4 – 60068-2-2 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
ENVIRONMENTAL TESTING –
Part 2-2: Tests – Test B: Dry heat
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
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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
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...
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