IEC 60068-2-14:2009

Environmental testing - Part 2-14: Tests - Test N: Change of temperature

IEC 60068-2-14:2009 provides a test to determine the ability of components, equipment or other articles to withstand rapid changes of ambient temperature. The exposure times adequate to accomplish this will depend upon the nature of the specimen. The major changes with regard to the previous edition concern:
- merging of the previous version of IEC 60068-2-14 with IEC 60068-2-33: Guidance on change of temperature tests;
- updating of the figures, changes to some of the wording and editorial corrections made for clarification.

Essais d'environnement - Partie 2-14: Essais - Essai N: Variation de température

La CEI 60068-2-14:2009 fournit un essai qui a pour but de déterminer l'aptitude des composants, équipements ou autres articles à subir des variations rapides de la température ambiante. Les durées d'exposition susceptibles de conduire à ce but dépendent de la nature du spécimen. Les principales modifications par rapport à l'édition précédente sont les suivantes:
- fusion de l'édition précédente de la CEI 60068-2-14 et de la CEI 60068-2-33: Guide pour les essais de variations de température;
- mises à jour des figures, modifications terminologiques et éditoriales faites pour clarification.

General Information

• Status: Published
• Publication Date: 11-Jan-2009
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 19.040 - Environmental testing
• Technical Committee: TC 104 - Environmental conditions, classification and methods of test
• Drafting Committee: MT 16 - TC 104/MT 16
• Current Stage: DELPUB - Deleted Publication
• Start Date: 22-Oct-2021
• Completion Date: 27-Jul-2023

Relations

• Revised: IEC 60068-2-14:2023 - Environmental testing - Part 2-14: Tests - Test N: Change of temperature
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60068-2-14
Edition 6.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-14: Tests – Test N: Change of temperature

Essais d’environnement –
Partie 2-14: Essais – Essai N: Variation de température

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IEC 60068-2-14
Edition 6.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-14: Tests – Test N: Change of temperature

Essais d’environnement –
Partie 2-14: Essais – Essai N: Variation de température

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 19.040 ISBN 978-2-88910-036-1
– 2 – 60068-2-14 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Field conditions of changing temperature .7
4 General .8
4.1 Design of change of temperature tests .8
4.2 Test parameters .8
4.3 Purpose and choice of the tests .8
4.4 Choice of the duration of the exposure .8
4.5 Choice of the duration of the transfer time.9
4.6 Applicability limits of change of temperature tests .9
5 Guidance for the selection of the kind of test .10
6 Initial and final measurements .10
6.1 Initial measurements .10
6.2 Final measurements .10
7 Test Na: Rapid change of temperature with prescribed time of transfer .10
7.1 General description of the test.10
7.2 Testing procedure .10
7.2.1 Testing chamber.10
7.2.2 Mounting or supporting of the test specimen.11
7.2.3 Severities .11
7.2.4 Conditioning .11
7.2.5 Test cycle.11
7.3 Recovery.12
7.4 Information to be given in the relevant specification .12
8 Test Nb: Change of temperature with specified rate of change .13
8.1 General description of the test.13
8.2 Testing procedure .13
8.2.1 Testing chamber.13
8.2.2 Mounting or supporting of the test specimen.13
8.2.3 Severities .13
8.2.4 Conditioning .14
8.2.5 Test cycle.14
8.3 Recovery.15
8.4 Information to be given in the relevant specification .15
9 Test Nc: Rapid change of temperature, two-fluid-bath method .16
9.1 General description of the test.16
9.2 Testing procedure .16
9.2.1 Testing equipment .16
9.2.2 Severities .16
9.2.3 Conditioning .16
9.3 Test cycle.16
9.4 Recovery.17
9.5 Information to be given in the relevant specification .17

60068-2-14 © IEC:2009 – 3 –
10 Information to be given in the test report .18

Figure 1 – Determination of test duration time (t ).9
Figure 2 – Na test cycle .12
Figure 3 – Nb test cycle .15
Figure 4 – Nc test cycle .17

– 4 – 60068-2-14 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-14: Tests – Test N: Change of temperature

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International Standard IEC 60068
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