This Standard classifies the groups of environmental parameters and their severi-
ties to which products, together with their packaging if any, are subjected when stored.
The environmental conditions specified in this Standard are limited to those which
may directly affect the products or their ultimate performance. Only environmental
conditions as such are considered. No special description of the effects of these condi-
tions on the products is given.
Transfer during storage is not included in the classification.
Environmental conditions directly related to fire or explosion and conditions related
to ionizing radiation are excluded. Any other unforeseen incidents are also excluded.
The possibility of their occurrence should be taken into account in special cases. Off-
shore locations are not included.
Conditions of stationary use, portable and non-stationary use, use in vehicles and
ships, and conditions of transportation are given in other sections ofJIS C 60721-3.
A limited number of classes of environmental conditions is given, covering a broad
field of application. The user of this Standard should select the lowest classification
necessary for covering the conditions of intended storage.
NOTE : The International Standard corresponding to this Standard is as follows.
IEC 60721-3-1 : 1997 Classification of'environmental conditions Port 3:
Classification of groups of environmental parameters and their severi-
ties Section l: Storage (IDT)
In addition, symbols which denote the degree of correspondence in the
contents between the relevant International Standard and JIS are IDT
(identical), MOD (modified), and NEQ (not equivalent) according to ISO/
IEC Guide 21.