The test time of the low temperature test chamber is determined according to the characteristics of the product. Generally, the non-hazardous or non-safety related product can be taken as 4h after the temperature is stable. After the temperature of the explosives, ammunition and organic plastics is stable, a minimum of 72 hours of low temperature storage test is required. For low temperature test chambers, glass, ceramics and glass products (such as optical systems, laser systems and photovoltaic systems) should be selected for 24h low temperature storage time; low temperature working time is at least 2h after product temperature is stable; It can be started directly after the low temperature work test. If it is carried out separately, the product should be stabilized at low temperature and work for a period of time before starting.
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