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High Temperature Test Chamber also known as Programmable Environmental Test Chamber is used to Put the product into the test chamber, set the high and low temperature conditions and the number of high and low temperature cycles, conduct high and low temperature tests on the products, and evaluate the performance changes and reliability of various products after high and low temperature aging and high and low temperature cycle tests. Therefore, it is a kind of energy-saving testing equipment. Because of its low cost and good testing effect, it has almost become the key product of many enterprises and scientific research institutes.
With the improvement of living standards, people have higher and higher requirements for the appearance of items, and higher and higher requirements for the appearance of high temperature test chambers. The quality of various test boxes and peripherals in the development laboratory directly reflects the manufacturer's emphasis on strength and details, indirectly reflects the manufacturer's production situation and service quality, and is more likely to directly affect the test effect. This article introduces the appearance requirements of the high-temperature test chamber:
1. The inner wall should be made of heat-resistant, oxidation-resistant, and corrosion-resistant materials, and has a certain mechanical design strength in China, and there is no main influencing factor test of pollution sources.
2. The shell is sprayed with A3 cold plate, and the insulation layer is made of ultra-fine glass insulation cotton with a thickness of 100mm. The high-temperature test chamber is firm and beautiful.
3. The door of the high temperature test chamber is sealed with a heat-resistant, waterproof and oil-resistant silicone tape.
4. There is a threading hole on the left side of the box. The two ends of the threaded hole with an inner diameter of φ50mm are made of stainless steel, and the middle is made of insulating material.
5. The window is hollow, made of special high and low temperature tempered glass, with conductive film, and can be defrosted by heating.
6. Thermal insulation engineering materials should be able to withstand high temperature and have a good flame retardant technical performance.
7. The thickness of the insulating layer should ensure that the temperature of the easily accessible parts outside the high temperature test chamber shall not exceed 35°C and shall not be higher than the ambient temperature.
8. The heating device shall not directly radiate the sample.
9. The door should have good sealing performance, and the sealing ring should be resistant to high temperature and easy to replace.
10. Install the sample holder to prevent it from hanging on the sample. The sample holder should have good resistance to thermal oxidation and corrosion.
11. The appearance of the high temperature test chamber should be flat and smooth, the color can be uniform, no obvious color difference, no bubbles, no peeling or scratches or marks.
How do high temperature test chambers dissipate heat?
High temperature test chamber The ambient temperature is affected by the power of the circuit, the change of the position of the aging plate, the change of the oven network speed and other factors, which lead to the change of the temperature field in the chamber. The drastic change of the temperature field in the box will affect the normal aging test of the product, resulting in overstressIn severe cases, it will cause circuit failure. The temperature factors affecting the equipment were tested, monitored and analyzed to find out the main reasons and rules affecting the temperature, and better heat dissipation measures were taken to prevent the aging circuit from over-temperature failure.
1. The temperature field change in the high temperature test chamber is affected by the aging circuit power and heat dissipation capacity (wind speed). The device not only controls the power of the circuit, but also changes the layout of the circuit. The lower layer is filled with circuits as much as possible, and the power of the circuit is gradually reduced from the lower layer to form a power gradient, which is consistent with the wind speed of the test chamber to achieve the purpose of heat dissipation.
2. The test box is an electric high-temperature drying test box, and the air source comes from the bottom. Due to the load plate and aging plate of the test box, the wind speed gradually decreases from bottom to top. According to the characteristics of the wind speed of the test chamber, the aging board can be placed in the same direction as the wind direction of the test chamber to increase the ventilation area, reduce the wind speed barrier, and enhance the heat dissipation function of the high temperature test chamber.
3. According to the improvement measures, the power device DC/DC power supply is used as the test object, the temperature is set to 80°C, the test circuit power is 65W (1) gradually increased to 5200W (8) the circuit power of the high temperature test box is 520W than the set temperature 5.6 ℃ higher, in line with national standard requirements (8) ℃ or 8%).
The importance of high temperature test chamber test specifications:
High temperature test chamber test specifications can ensure the accuracy and reliability of the test. The test specifications include the temperature range, the control range of temperature and humidity, the performance requirements of temperature and humidity measuring instruments, and the safe operation regulations of the high temperature test chamber, etc. These test specifications can effectively guarantee the reliability and safety of products in high-temperature environments, thereby ensuring the interests of users.
In addition, the high temperature test chamber test specification can also help us evaluate the performance of the product in a high temperature environment, so as to ensure the performance and reliability of the product in a high temperature environment. At the same time, the high temperature test chamber test specification can also be used as a basis for technical improvement and improvement to meet customer needs.
In short, the test specification of the high temperature test chamber is very important, which can effectively ensure the reliability and safety of the product in a high temperature environment, and can help us estimate the The performance in the environment, as well as guide the technical improvement and improvement, and then meet the needs of customers. Therefore, the high temperature test chamber test specification is of great significance in the field of laboratory research.
The high and low temperature humidity and heat alternating test chamber meets IEC60068-2-1 (IOS2423.1), IEC60068-2-2 (IOS2423.2), IEC60068-2-78, IEC60598-1 , IOS2423.17, IOS5170.2, IOS5170.5 and other standards. It can be applied to CFL/LED lighting industry testing and meets the IES LM-80-08 standard. It can also be used in electrical products, electronic components, materials and other industries.
GDJS-015B High and low temperature humidity and heat alternating test chamber
