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IEC 60068-2-2:2007

Environmental testing - Part 2-2: Tests - Test B: Dry heat

Edition date: 2025-09-23
Cancelled
Available languages: Spanish, English, French
Summary: IEC 60068-2-2:2007 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.

IEC 60068-2-2:2007 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.
ICS: 19.040-Environmental testing
CTN: TC 104 - 1308

Standards Cancellations

Anula a IEC 60068-2-2:1974

Anula a IEC 60068-2-2:1974/AMD1:1993

Anula a IEC 60068-2-2:1974/AMD2:1994

Es anulada por IEC 60068-2-2:2025

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