What kind of requirements should the constant temperature and humidity machine meet during the purchase period
Time:2021/8/2 15:37:50
Constant temperature and humidity machine is a widely used experimental device, mainly used for environmental testing of various parts. It is very important to understand the relevant information before buying a constant temperature and humidity machine. So what requirements should be met when purchasing a constant temperature and humidity machine? Next, let the editor of the constant temperature and humidity machine explain it, I hope it can be something for everyone help.
1. Environmental testing, especially reliability testing. The detection cycle is long, and sometimes the detection object is expensive military products. In the testing process, testers often need to work on site or conduct tests. Therefore, constant temperature and humidity equipment must ensure safe operation, convenient operation, and long service life.
2. The size of the studio requires you to know the upper limit of the outer size of your test piece, and then choose according to the size. The selection basis is the upper limit of external dimensions plus 20 cm; if it is an irregular shape, the three-dimensional volume should not exceed the volume of the work. 1/3 of the volume of the box, the unit cross section is not more than 1/2, and any surface of the test piece is more than 10cm away from the wall of the box. Otherwise, the test result is invalid and cannot be recognized.
3. Relevant standards and regulations for constant temperature and humidity machines
During the environmental test, the wind speed in the temperature and humidity chamber should be less than 1.7m/s. For the test itself, the lower the wind speed, the better. If the wind speed is too high, heat transfer will be accelerated. Between the sample surface and the air flow in the box, this is very important for the authenticity of the test. But in order to ensure the uniformity in the working chamber of the constant temperature and humidity machine, there must be circulating air in the test chamber.
4. If the constant temperature and humidity machine has a cooling system, the cooling system must be periodically cooled. The test chamber has two types: air-cooled and water-cooled.
The above four points are all about the requirements that need to be met when purchasing a constant temperature and humidity machine. Thank you for your understanding and support!