I know the cold and hot shock test box
1. What is a hot and cold shock test box?
The cold and hot shock box adopts the cold storage method, which is the cold and hot alternating shock method for the product to be tested, and the performance and parameters of the product after the rapid temperature change are tested
2. What are the uses of the thermal shock test chamber?
Hot and cold shock tester is used in electronic and electrical components, automation parts, communication components, auto parts, metals, chemical materials, plastics and other industries, defense industry, aerospace, military industry, BGA, PCB substrate, electronic chip IC, semiconductor The physical changes of ceramics and polymer materials, testing the material's repeated resistance to high and low temperatures and the chemical changes or physical damage of the product during thermal expansion and contraction can confirm the quality of the product, from precision IC to heavy machinery None of the components are ideal test tools that do not require it.
2. How to choose the cold and hot shock test box?
1. Impact temperature. Impact temperature refers to the maximum temperature range that the test zone can actually run to. Note that it is not the limit temperature of the preheating and precooling room.
2. Test load. This parameter directly affects how many test items can be placed. Generally speaking, the larger the weight, the better.
3. Return time. It refers to the time it takes for the test product to switch from one temperature point to another temperature point. Our common specification convention is ≤5min. The smaller the time, the better.
4. Defrost time. The longer the defrost interval, the better. Now there are manufacturers who can do defrosting once every 1000 cycles, which is very ideal. The shorter the defrost interval, the worse the air tightness of the device!
5. Sensor placement. The specification requires that the sensor must be placed inside the test area. Some manufacturers place the sensor inside the air duct, although it is only 10cm away from the test area, but this energy difference is quite large. And can not truly reflect the temperature change of the surface of the test article.
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