標準號：DIN EN 60721-3-9-1995
中文標準名稱：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
英文標準名稱：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
標準類型：A21
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：A21
國際標準分類號：19.040
適用范圍：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.