The purpose of the high temperature and high humidity (steady state) test is to determine the ability of a component, equipment or other product to be used or stored in conditions of high relative humidity.
JIS C 60068-2-3:1987 history
2015JIS C 60068-2-78:2015 Environmental testing -- Part 2-78: Tests -- Test Cab: Damp heat, steady state
2004JIS C 60068-2-78:2004 Environmental testing -- Part 2-78: Tests -- Test Cab: Damp heat, steady state
1987JIS C 60068-2-3:1987 Basic environmental testing procedures Part 2: Tests, Test Ca: Damp heat, steady state