National foreword

This British Standard was published by BSI. It is the UK implementation of EN 60068‑2‑1:2007. It is identical with IEC 60068‑2‑1:2007. It supersedes BS EN 60068‑2.1:1993 which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee GEL/104, Environmental conditions, classification and testing.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2007

This European Standard was approved by CENELEC on 2007-04-01. 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.

Foreword

The text of document 104/407/FDIS, future edition 6 of IEC 60068‑2‑1, 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 60068‑2‑1 on 2007-04-01.

This European Standard supersedes EN 60068‑2‑1:1993+ A1:1993 + A2:1994.

EN 60068‑2‑1:2007 deals with cold tests applicable both to non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab and Ad do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test including the conditioning periods.

The following dates were fixed:

Annex ZA has been added by CENELEC.

Endorsement notice

The text of the International Standard IEC 60068‑2‑1:2007 was approved by CENELEC as a European Standard without any modification.

INTRODUCTION

Relationship of suffixes between tests a: cold and tests b: dry heat

The relationship of suffixes between Tests A: Cold, and Tests B: Dry heat, is shown in the following table:

1 Scope and object

This part of IEC 60068 deals with cold tests applicable to both non heat-dissipating and heat-issipating specimens. For non heat-dissipating specimens, Tests Ab and Ad do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods.

The object of the cold test is limited to the determination of the ability of components, equipment or other articles to be used, transported or stored at low temperature.

Cold tests cover by this standard 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.

The cold tests are subdivided as follows:

Cold tests for non heat-dissipating specimens
- with gradual change of temperature, Ab;
Cold test for heat-dissipating specimens
- with gradual change of temperature, Ad,
- with gradual change of temperature, specimen powered throughout, Ae.

The procedures given in this standard are normally intended for specimens that achieve temperature stability during the performance of the test procedure.

Temperature chamber(s) are constructed and verified in accordance with specifications IEC 60068‑3‑5 and IEC 60068‑3‑7.

Further guidance for dry heat and cold tests can be found in IEC 60068‑3‑1 and general guidance in IEC 60068‑1.

2 Normative references

3 Terms and definitions

4 Application of tests for non heat-dissipating specimens versus tests for heat-dissipating specimens

4.1 General

4.2 Ascertaining high or low air velocity in the test chamber

4.3 Non heat-dissipating specimens

4.4 Testing of heat-dissipating specimens

4.5 Temperature monitoring

4.6 Packaging

4.7 Diagrammatic representations

5 Test description

5.1 General

5.2 Test Ab: Cold for non heat-dissipating specimens with gradual change of temperature

5.3 Test Ad: Cold for heat-dissipating specimens with gradual change of temperature that are powered after initial temperature stabilization

5.4 Test Ae: Cold for heat-dissipating specimens with gradual change of temperature that are required to be powered throughout the test

6 Test procedure

6.1 Confirmation of performance

6.2 Working space

6.3 Thermal radiation

6.4 Specimen with artificial cooling

6.5 Mounting

6.6 Severities

6.7 Preconditioning

6.8 Initial measurements

6.9 Conditioning

6.10 Intermediate measurements

6.11 Final temperature ramp

6.12 Recovery

6.13 Final measurements

7 Information to be given in the relevant specification

8 Information to be given in the test report

BS EN 60068-2-1:2007

Environmental testing - Tests. Test A. Cold

Current, Under Review

Published:

31 May 2007