EN 60721-3-7:1995/A1:1997

FOREWORD
1 Scope
2 Normative references
3 Definitions
4 General
5 Classification of groups of environmental parameters
  and their severities
6 Sets of environmental condition class combinations
Annexes
A (informative) Survey of conditions affecting the choice of
                  environmental parameters and their severities
B (informative) Interdependence of air temperature, relative
                  humidity and absolute humidity
C (informative) Examples for practical application of the
                  classification specified in this standard
D (informative) Summary of conditions covered by sets of class
                  combinations
E (informative) Explanation of the environmental conditions in
                  tropical areas as specified in classes 7K6 and
                  7K7
ZA (normative) Other International Publications quoted
                  in this standard with the references of the
                  relevant European publications
Tables
Figure

Classifies groups of environmental parameters and their severities to which products are subjected during portable and non-stationary use. These include: the environmental conditions at locations where the product may be placed or used temporarily, the change of environmental parameters due to change of location and conditions related to transfer of the product between different locations. The environmental conditions classified do not take into account the use profile of the product. Limited to those which may directly affect the performance of products. Environmental conditions directly related to fire or explosion hazards and conditions related to ionizing radiation are excluded. Microclimate within a product is not included.