DIN EN 60721-3-9-1995 環境條件分類.第3部分:環境參數及其嚴酷程度分級.第9節:產品內的微型氣候
Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities; section 9: Microclimates inside products (IEC 60721-3-9:1993); German version EN 60721-3-9:1993
This document defines classes of microclimatic conditions, to which components (basic parts, assemblies, built-in units) may be subjected inside products, which are used under the climatic conditions as classified in sections IEC 721-3-3 and IEC 721-3-4. A limited number of microclimatic classes is specified taling into consideration typical limiting high air temperatures of components.