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BS EN IEC 60068-2-38:2021 – TC

BS EN IEC 60068-2-38:2021 – TC

$186.33

Tracked Changes. Environmental testing – Tests. Test Z/AD: Composite temperature/humidity cyclic test

Published By Publication Date Number of Pages
BSI 2021 62
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IEC 60068-2-38:2021 is available as IEC 60068-2-38:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60068-2-38:2021 specifies a composite test procedure, primarily intended for component type specimens, to determine, in an accelerated manner, the resistance of specimens to the deteriorative effects of high temperature/humidity and cold conditions. This test standard does not apply to specimens that are energized during the complete test. Specimens can be energized during the constant phases of the tests. Measurements on energized specimens are typically carried out during constant phases of the test unless specified otherwise. This third edition cancels and replaces the second edition, published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – the figures have been updated; – changes to the wording has been made for clarification purposes.

PDF Catalog

PDF Pages PDF Title
34 undefined
37 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
39 English
CONTENTS
41 FOREWORD
43 1 Scope
2 Normative references
3 Terms and definitions
4 General
4.1 Description of the test
44 4.2 Application of the test
45 5 Description of test chamber
5.1 General
5.2 Chamber for exposure to moisture
5.3 Chamber for exposure to cold
46 6 Severities
7 Testing procedure
7.1 Preconditioning
47 7.2 Initial measurements
7.3 Conditioning
Figure 1 – Preconditioning
49 Figure 2 – Exposure to humidity followed by exposure to cold
50 7.4 Test cycle
7.4.1 Description of temperature/humidity subcycle
Figure 3 – Exposure to humidity not followed by exposure to cold
51 7.4.2 Description of cold subcycle
52 7.4.3 Description of 24 h cycles with no exposure to cold
7.4.4 Description of final cycle
7.4.5 Intermediate measurements
53 Figure 4 – Test times for intermediate operation of specimen – Exposure to humidity followed by exposure to cold
54 7.5 Final measurements
7.5.1 Introductory remarks
Figure 5 – Test times for intermediate operation of specimen – Exposure to humidity not followed by exposure to cold
55 7.5.2 At high humidity
7.5.3 Immediately upon removal from the chamber
7.5.4 After final drying
8 Information to be given in the relevant specification
56 9 Information to be given in the test report
57 Annex A (informative) Supporting documentation for test sequence
A.1 General
A.2 Preconditioning
Table A.1 – Relative humidity tolerances
Table A.2 – Temperature tolerances
58 A.3 Exposure to humidity followed by exposure to cold
Table A.3 – Tolerances of relative humidity and temperature during exposure to humidity followed by exposure to cold
59 A.4 Exposure to humidity not followed by exposure to cold
Table A.4 – Tolerances of relative humidity and temperature during exposure to humidity not followed by exposure to cold
60 Bibliography

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BS EN IEC 60068-2-38:2021 - TC
$186.33