(normative)
Conditioning/ageing for connection components
C.1 Salt mist treatment
Salt mist treatment shall be in accordance with IEC 60068-2-52:1996, except for Clauses 7, 10 and 11 which are not applicable. The test is carried out using severity (2).
If the salt mist chamber can maintain the temperature conditions as specified in 9.3 of IEC 60068-2-52:1996 and a relative humidity of not less than 90 %, then the specimen may remain in it for the humidity storage period.
C.2 Humid sulphurous atmosphere treatment
Humid sulphurous atmosphere treatment shall be in accordance with ISO 6988:1985 with seven cycles with a concentration of sulphur dioxide of 667 x 10-6 (in volume) ± 25 x 10-6, except for Clauses 9 and 10 which are not applicable.
Each cycle which has duration of 24 h is composed of a heating period of 8 h at a temperature of 40 °C ± 3 °C in the humid saturated atmosphere which is followed by a rest period of 16 h. After that, the humid sulphurous atmosphere is replaced.
If the test chamber maintains the temperature conditions as specified in 6.5.2 of ISO 6988:1985 then the specimen may remain in it for the storage period.
C.3 Ammonia atmosphere treatment
Ammonia atmosphere treatment shall be in accordance with ISO 6957:1988 for a moderate atmosphere with the pH value 10 except for 8.4 and Clause 9, which are not