Historical
IEC 60721-2-1 Ed. 1.0 b:1982
Classification of environmental conditions. Part 2: Environmental conditions appearing in nature. Temperature and humidity
Presents types of open-air climate in terms of temperature and humidity. Intended to be used as a part of the background material when selecting appropriate temperature and humidity severities for product applications. Colour maps CHF 10.- (the set)
International Electrotechnical Commission [iec]