Environmental testing - Part 3-7: Supporting documentation and guidance - Measurements in temperature chambers for tests A (Cold) and B (Dry heat) (with load) (IEC 60068-3-7:2020)

This part of IEC 60068 specifies a uniform and reproducible method of confirming that
temperature test chambers conform to the requirements specified in the climatic test procedures
of IEC 60068-2-1 and IEC 60068-2-2, when loaded with either heat-dissipating or non heatdissipating
specimens under conditions which take into account air circulation inside the
working space of the chamber. This document is intended primarily for users when conducting
regular chamber performance monitoring.

Umweltprüfungen - Teil 3-7: Unterstützende Dokumentation und Leitfaden - Messungen in Temperaturprüfkammern für die Prüfungen A und B (mit Prüfgut) (IEC 60068-3-7:2020)

Essais d'environnement - Partie 3-7: Documentation d'accompagnement et guide - Mesures dans les chambres d'essai en température pour les essais A et B (avec charge) (IEC 60068-3-7:2020)

IEC 60068-3-7:2020 est disponible sous forme de IEC 60068-3-7:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60068-3-7:2020 spécifie une méthode uniforme et reproductible pour confirmer que les chambres d'essai en température respectent les exigences spécifiées dans les procédures d'essai climatique de l'IEC 60068-2-1 et de l'IEC 60068-2-2 lorsqu'elles sont chargées de spécimens dissipateurs d'énergie ou non, dans des conditions qui tiennent compte d'une circulation d'air à l'intérieur de l'espace de travail de la chambre. Le présent document s'adresse en premier lieu aux utilisateurs qui effectuent une surveillance régulière des performances des chambres. Cette deuxième édition annule et remplace la première édition parue en 2001. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - dans plusieurs parties, les formes verbales ont été remplacées par des exigences explicites en lieu et place des recommandations ("devoir" au lieu de "il convient"); - le Tableau 1 a été mis à jour.

Okoljsko preskušanje - 3-7. del: Podporna dokumentacija in navodilo - Meritve v temperaturnih komorah za preskuse A (hladno) in B (suha toplota) (z obremenitvijo) (IEC 60068-3-7:2020)

General Information

Status
Published
Publication Date
14-Sep-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Sep-2020
Due Date
16-Nov-2020
Completion Date
15-Sep-2020

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SLOVENSKI STANDARD
SIST EN IEC 60068-3-7:2020
01-november-2020
Nadomešča:
SIST EN 60068-3-7:2002
Okoljsko preskušanje - 3-7. del: Podporna dokumentacija in navodilo - Meritve v
temperaturnih komorah za preskuse A (hladno) in B (suha toplota) (z
obremenitvijo) (IEC 60068-3-7:2020)
Environmental testing - Part 3-7: Supporting documentation and guidance -

Measurements in temperature chambers for tests A (Cold) and B (Dry heat) (with load)

(IEC 60068-3-7:2020)

Umweltprüfungen - Teil 3-7: Unterstützende Dokumentation und Leitfaden - Messungen

in Temperaturprüfkammern für die Prüfungen A und B (mit Prüfgut) (IEC 60068-3-7:2020)

Essais d'environnement - Partie 3-7: Documentation d'accompagnement et guide -

Mesures dans les chambres d'essai en température pour les essais A et B (avec charge)

(IEC 60068-3-7:2020)
Ta slovenski standard je istoveten z: EN IEC 60068-3-7:2020
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
29.020 Elektrotehnika na splošno Electrical engineering in
general
SIST EN IEC 60068-3-7:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 60068-3-7:2020
---------------------- Page: 2 ----------------------
SIST EN IEC 60068-3-7:2020
EUROPEAN STANDARD EN IEC 60068-3-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2020
ICS 19.040; 29.020 Supersedes EN 60068-3-7:2002 and all of its
amendments and corrigenda (if any)
English Version
Environmental testing - Part 3-7: Supporting documentation and
guidance - Measurements in temperature chambers for tests A
(Cold) and B (Dry heat) (with load)
(IEC 60068-3-7:2020)

Essais d'environnement - Partie 3-7: Documentation Umgebungseinflüsse - Teil 3-7: Unterstützende

d'accompagnement et recommandations - Mesurages dans Dokumentation und Leitfaden - Messungen in

les chambres d'essai en température pour les essais A Temperaturprüfkammern für Prüfungen A (Kälte) und B

(froid) et B (chaleur sèche) (avec charge) (trockene Wärme) (mit Prüfgut)
(IEC 60068-3-7:2020) (IEC 60068-3-7:2020)

This European Standard was approved by CENELEC on 2020-08-11. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60068-3-7:2020 E
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SIST EN IEC 60068-3-7:2020
EN IEC 60068-3-7:2020 (E)
European foreword

The text of document 104/868/FDIS, future edition 2 of IEC 60068-3-7, 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 IEC 60068-3-7:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-05-11

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-08-11

document have to be withdrawn

This document supersedes EN 60068-3-7:2002 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 60068-3-7:2020 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 60068-2-1 NOTE Harmonized as EN 60068-2-1
IEC 60068-2-2:2007 NOTE Harmonized as EN 60068-2-2:2007 (not modified)
IEC 60068-3-1 NOTE Harmonized as EN 60068-3-1
IEC 60068-3-6:2018 NOTE Harmonized as EN IEC 60068-3-6:2018 (not modified)
IEC 60584-1 NOTE Harmonized as EN 60584-1
IEC 60751 NOTE Harmonized as EN 60751
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SIST EN IEC 60068-3-7:2020
EN IEC 60068-3-7:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-3-5 - Environmental testing - Part 3-5: EN IEC 60068-3-5 -
Supporting documentation and guidance
- Confirmation of the performance of
temperature chambers
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SIST EN IEC 60068-3-7:2020
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SIST EN IEC 60068-3-7:2020
IEC 60068-3-7
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 3-7: Supporting documentation and guidance – Measurements in
temperature chambers for tests A (Cold) and B (Dry heat) (with load)
Essais d'environnement –
Partie 3-7: Documentation d'accompagnement et recommandations –
Mesurages dans les chambres d'essai en température pour les essais A (froid)
et B (chaleur sèche) (avec charge)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040; 29.020 ISBN 978-2-8322-8599-2

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 IEC 60068-3-7:2020
– 2 – IEC 60068-3-7:2020 © IEC 2020
CONTENTS

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

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Measuring system ........................................................................................................... 8

4.1 General description ................................................................................................. 8

4.2 Temperature ........................................................................................................... 8

4.2.1 General ........................................................................................................... 8

4.2.2 Temperature sensor ........................................................................................ 8

4.3 Humidity ................................................................................................................. 8

4.3.1 General ........................................................................................................... 8

4.3.2 Humidity sensor ............................................................................................... 9

4.4 Wall emissivity ........................................................................................................ 9

4.5 Air velocity .............................................................................................................. 9

4.5.1 General ........................................................................................................... 9

4.5.2 Air velocity sensor ........................................................................................... 9

4.5.3 Air velocity sensor response time .................................................................... 9

4.6 Recording device .................................................................................................... 9

5 Determination of temperature performances .................................................................... 9

5.1 Test area environment ............................................................................................ 9

5.2 Chamber loading ..................................................................................................... 9

5.2.1 General ........................................................................................................... 9

5.2.2 Location of test load ...................................................................................... 10

5.3 Installation of temperature sensors ....................................................................... 10

5.3.1 General ......................................................................................................... 10

5.3.2 Position of temperature sensors .................................................................... 10

5.3.3 Position of load sensors................................................................................. 10

6 Test procedures ............................................................................................................ 10

6.1 Confirmation methods ........................................................................................... 10

6.1.1 General ......................................................................................................... 10

6.1.2 Test without load ........................................................................................... 10

6.1.3 Test with load ................................................................................................ 10

6.2 Routine monitoring methods ................................................................................. 10

7 Evaluation criteria .......................................................................................................... 11

8 Information to be given in the performance report .......................................................... 11

Bibliography .......................................................................................................................... 12

Figure 1 – Examples of artificial loads ..................................................................................... 8

Table 1 – Test conditions ........................................................................................................ 7

Table 2 – Artificial load – Values ............................................................................................. 7

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SIST EN IEC 60068-3-7:2020
IEC 60068-3-7:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 3-7: Supporting documentation and guidance –
Measurements in temperature chambers for
tests A (Cold) and B (Dry heat) (with load)
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

...

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