标准摘要
[中文适用范围]： IEC 60721-3-9:2024 对微气候条件组进行了分类，产品内的组件（基本部件、组件、内置单元）可能受到这些微气候条件的影响，这些产品在 IEC 60721-3-3 和 IEC 60721-3-4 所分类的气候条件下使用。第二版取消并取代了 1993 年发布的第一版、修正案 1:1994 和勘误表 1:1995。此版本为技术修订。与前一版相比，此版本包括以下重大技术变化：a) 更新了第 2 条；b) 重新编辑并简化了第 4 条；c) 修订并更新了附件 A；d) 增加了新的附件 B，并给出了湿空气组成图的来源，这是绘制微气候图的基础。 [外文原描述]： 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.
英文名称Classification of environmental conditions - Part 3-9: Classification of groups of environmental parameters and their severities - Microclimates inside products