MIL-STD-810G Method 507.5 humidity diurnal cycle profiles. Provides hourly (24-hour) temperature and relative humidity for three humidity cycle categories for both natural and induced (storage and transit) conditions per Table 507.5-I: B1 Constant High Humidity (nearly constant 27 C, 95-100% RH); B2 Cyclic High Humidity (temperature 31-41 C cycling, RH 74-100%); B3 Hot Humid (temperature 31-41 C cycling, RH 59-88%). Induced conditions represent enclosed storage or transit environments with solar loading. The B2 induced cycle is not fully included (only B1 and B3 induced are provided in the table). Used for designing humidity exposure tests for materiel qualified for tropical and sub-tropical climates.