The testing is conducted in an environmental chamber designed to maintain tight controls over both temperature and humidity as well as the rates at which these quantities are changed. The test levels chosen and the rates of change between these levels are often typical of what might be encountered during an extreme distribution cycle, for example, or storage for an extended period of time.
It is generally recognized that thermal stresses are some of the most severe that a product or package will be exposed to during its entire lifecycle. In addition, any hydroscopic elements of a product or package system will change their strength characteristics as they absorb or release moisture. Both operational and non-operational testing is common.
(1) Thermal Shock Chamber
(2) Temp/Altitude Chambers
(2) Solar/UV Chambers