With the rapid development of science and technology and electronic information industry, electronic equipment is increasingly used in national defense, industry, agriculture, commerce, scientific research and civil applications. When electronic equipment is used in different places, it will encounter various complicated environmental factors, such as high temperature, high humidity, low temperature and other environments. The existence of these environmental factors will greatly affect the reliability of electronic information products. Therefore, many domestic and foreign manufacturers of environmental testing equipment have emerged, which is mainly used to test the mechanical or electronic properties of manufactured products in various simulated environments. The following mainly introduces how to choose high and low temperature damp heat test chamber.
1. Selection of high and low temperature damp heat test chamber volume: When the test product (component, component, component or whole machine) is placed in the climatic environment box for testing, in order to ensure that the atmosphere around the test product can meet the requirements of the test specification Test conditions, the volume of the tested product (W*H*D) shall not exceed (20~35)% of the effective working space of the test chamber (20% is recommended). It is recommended to use no more than 10% for the products that are heated in the test; the distance between the outer surface of the test product and the wall of the test chamber should be at least 100~150mm, and it is recommended to use (150mm).
2. Determine the temperature range: Hongda Company generally has 4 temperature ranges, A type 0°C-150°C; B type -20°C-150°C; C type -40°C-150°C; D type-60°C-150°C The temperature range is different, the price is different, so it is very important to determine the temperature range;
3. Determine the humidity range: the general standard model is 20%-98%. Special specifications such as low temperature and low humidity type need to determine the humidity at which temperature point. Because the corresponding humidity is different at low temperature, the price will vary greatly. , the same humidity, the price is also very different at different points of low temperature;
4. Determining the controller: Generally, it is divided into two types: touch type and button type. Nowadays, few companies make single-point type. With the development of technology, touch type is widely used, and it is more humanized and easy to operate.
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