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Thermal Shock Testing

1. Definition of Thermal Shock Test

Thermal shock test, also known as temperature shock test or high-low temperature impact test, involves exposing test samples alternately to low and high-temperature air (or suitable inert gas) to subject them to the effects of rapid temperature changes. It is used to determine the ability of components, equipment, and other products to withstand rapid changes in environmental temperature. This test assesses a product's adaptability to abrupt changes in ambient temperature and is an essential test in the qualification testing of equipment design and routine testing during batch production stages. In some cases, it can also be used for environmental stress screening. It can be said that the application frequency of thermal shock test chambers in verifying and improving the environmental adaptability of equipment is second only to vibration and high-low temperature tests.

2. Purpose of Thermal Shock Test

In practice, the thermal shock test chamber serves as a tool with different purposes at various stages of product development:

2.1. During the engineering development phase, it can be used to identify design and process defects in products;

2.2. It provides a basis for decision-making in product qualification or design approval and acceptance during batch production stages;

2.3. When used for environmental stress screening, its purpose is to eliminate early failures in products.

Therefore, when drafting environmental test or screening plans for different stages of the development process, as well as test or screening reports, the specific purpose of the thermal shock test should be clearly articulated, avoiding vague or general expressions.

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