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IEC 60721-3-9-ed.2.0
Classification of environmental conditions - Part 3-9: Classification of groups of environmental parameters and their severities - Microclimates inside products
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STANDARD published on 11.4.2024
The information about the standard:
Designation standards: IEC 60721-3-9-ed.2.0
Publication date standards: 11.4.2024
SKU: NS-1170800
Approximate weight : 300 g (0.66 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Annotation of standard text IEC 60721-3-9-ed.2.0 :
IEC 60721-3-9:2024 classifies groups of microclimatic conditions, to which components (basic parts, assemblies, built-in units) can be subjected inside products, which are used under the climatic conditions as classified in IEC 60721-3-3 and IEC 60721-3-4. This second edition cancels and replaces the first edition published in 1993, Amendment 1:1994 and Corrigendum 1:1995. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Clause 2 has been updated; b) Clause 4 has been re-edited and simplified; c) Annex A has been revised and updated; d) a new Annex B has been added and gives the origin of the constitutional diagram for humid air, which is the basis of drawing the climatogram for a microclimate. LIEC 60721-3-9:2024 classifie les groupements des conditions microclimatiques auxquelles les composants (parties elementaires, assemblees, encastrees) peuvent etre soumis a linterieur des produits, lorsquils sont utilises dans les conditions climatiques classifiees dans lIEC 60721-3-3 et lIEC 60721-3-4. Cette deuxieme edition annule et remplace la premiere edition parue en 1993, l’Amendement 1:1994 et le Corrigendum 1:1995. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: a) l’Article 2 a ete mis a jour; b) l’Article 4 a ete reformule et simplifie; c) l’Annexe A a ete revisee et mise a jour; d) une nouvelle Annexe B a ete ajoutee et fournit lorigine du diagramme constitutionnel pour lhumidite de lair, qui sert de base a letablissement du climatogramme dun microclimat.
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