The appearance of environmental testing equipment should be catalyzed by the development of the industry, especially the high and low temperature damp heat test box (also known as constant temperature and humidity test box), which is for human beings to further resist the damage of environmental factors by developing products and objects Developed. Today, Dongguan Qinzhuo Environmental Testing Equipment Co., Ltd. mainly analyzes how to choose the model when customers purchase high and low temperature humidity heat test chambers, and makes further analysis and answers.
With the rapid development of science and technology and the electronic information industry, electronic equipment has become more and more widely used in defense, industry, agriculture, commerce, scientific research and civilian use. When electronic equipment is used in different places, it will encounter various complex environmental factors, such as high temperature, high humidity, and low temperature. The existence of these environmental factors will greatly affect the reliability of electronic information products.
Among them, there are more than a dozen factors that have a greater impact on the use and life of electronic equipment. Engineers engaged in the study of environmental conditions of electronic equipment products have summarized the environmental conditions induced by the existence of nature and human activities into a series of test standards and specifications. In this way, there are many domestic and foreign manufacturers specializing in manufacturing environmental test equipment.
The following mainly introduces how to choose high and low temperature damp heat test chamber.
Selection of the volume of the high and low temperature damp heat test box: When the tested product (generator parts, components, parts or the whole machine) is placed in the climate environment box for testing, in order to ensure that the atmosphere around the tested product can meet the environmental test conditions specified in the test specifications The following points should be followed between the working size of the climate chamber and the outer size of the tested product:
a. 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 select no more than 10% for products that generate heat in the test
b. The ratio of the windward cross-sectional area of ​​the tested product to the total area of ​​the test chamber studio on the cross-section is not greater than (30 ~ 50)% (35% recommended)
c. The distance between the outer surface of the tested product and the wall of the test chamber should be at least 100 ~ 150mm, and it is recommended to use (150mm)
Selection of high and low temperature damp heat test box control mode:
There are two cases of temperature and humidity test chamber: constant test chamber and alternating test chamber. The ordinary high and low temperature test box generally refers to the constant high and low temperature test box. The control method is: setting a target temperature, and the test box has the ability to automatically thermostat to the target temperature point. The control method of the constant temperature and humidity test box is also similar. Set a target temperature and humidity point. The test box has the ability to automatically thermostat to the target temperature and humidity point. The high and low temperature alternating test chamber has one or more high and low temperature change and cycle programs. The test chamber has the ability to complete the test process according to the preset curve, and can be accurately controlled within the range of the maximum heating and cooling rate capability The heating and cooling rate can be controlled according to the slope of the set curve. Similarly, the high and low temperature alternating heat and humidity test chamber also has preset temperature and humidity curves, and the ability to control according to presets. Of course, the alternating test chamber has the function of a constant test chamber, but the manufacturing cost of the alternating test chamber is higher, because the alternating test chamber needs to be equipped with an automatic curve recording device, a program control instrument, and the test chamber must also be solved in the working room. The problem of turning on the refrigerator when the temperature is high, therefore, the price of the alternating test chamber is generally more than 20% higher than the price of the constant test chamber. Therefore, we should be realistic and take the needs of the test method as the starting point, choose a constant test box or an alternating test box.
After correctly mastering the selection techniques of the above high and low temperature and humidity test chambers, when we purchase the high and low temperature and humidity test chambers, we can fully purchase the corresponding models of high and low temperature and humidity test chambers according to our testing needs. Test requirements bring satisfactory test results.
Check out our metal bag handles selection for the very best in unique or custom, our metal bag handles mostly made of zinc alloy, with a number of sizes, shapes colors and technologies to choose from, we also offer ODM & OEM services, welcome to customize your own style.
In order to meet the customer's one-stop purchasing needs, we opened a hardware factory, which specialized in manufacturing various types of hardware for handbags, shoes, clothing and other ornament and craftwork fields, with the history of 14 years. Covering an area of 3000 square meters and having 15 professional technicians in the design and development teams, they can develop more than 100 new designs each month. There are 4 die-casting machines in the workshop can produce 1, 000, 000PCS products every month.
Main products: Metal logo and label; Metal lock for handbags; Letter logo; Metal zip puller; Handbag Metal Handle; Handbag pendant; Snap Hook ; D Ring ; Square buckle; Pin Buckle; Adjustable buckle; Rviets; Metal studs; Eyelet; Shoes buckle; Decorative buckle for garment; Perfume Bottle Cap; Ornamentation and artware etc.
Chain Strap Bag,Leather Bag Handles,Wooden Bag Handles,Mini Handbags With Handles
Guangzhou Jerryan Leather Co.,Ltd , https://www.jerryanbag.com