This part of IEC 60721 presents classifications of open-air climates in terms of temperature and humidity. It is intended to be used as part of the background material when selecting appropriate temperature and humidity severities for product testing and application. The climates cover all areas of the world@ excluding the central Antarctic and high altitudes (above 5 000 m). This presentation may be used as background material when issuing climatic environmental classes for product applications. This standard defines a limited number of open-air climate classifications@ in terms of temperature and humidity@ which represent the conditions most frequently met by products while being transported@ stored@ installed and used.
IEC 60721-2-1:2013 history
2013IEC 60721-2-1:2013 Classification of environmental conditions - Part 2-1: Environmental conditions appearing in nature - Temperature and humidity
2002IEC 60721-2-1:2002 Classification of environmental conditions - Part 2-1: Environmental conditions appearing in nature; Temperature and humidity
1970IEC 60721-2-1:1982/AMD1:1987 Amendment 1 - Classification of environmental conditions. Part 2: Environmental conditions appearing in nature. Temperature and humidity
1982IEC 60721-2-1:1982 Classification of environmental conditions. Part 2: Environmental conditions appearing in nature. Temperature and humidity.