what are the precautions for purchasing high and low temperature test boxes?
At present, the high and low temperature test box has been one of the indispensable test equipment for many manufacturers. However, driven by the profits in the environmental test equipment industry, the quality of equipment in the industry is uneven, which seriously interferes with customers' selection of equipment. But in the environmental test equipment industry, there are also reliable suppliers, but how should we judge? The following small series talks about the precautions for purchasing high and low temperature test boxes on this issue.
1. Workmanship: In fact, many users can't know the performance and configuration of the equipment before using the high and low temperature test boxes, and they don't know the great difference between the high and low temperature test boxes in the market, so they usually pay attention to the appearance of the equipment first. A fine shell must ensure that the surface of the box is not rough, the plates are bent flat, and the wires are arranged in an orderly and well-defined sequence. If all these requirements are met, the quality of this product should not be much worse.
2. After-sales: A guaranteed manufacturer of high and low temperature test boxes usually has a perfect after-sales service system. Only in this way can the user's high and low temperature test boxes be effectively and quickly solved when they fail.
of course, if conditions permit, we should visit the base where high and low temperature test boxes are produced, so that we can not only know all the information of the equipment, but also further understand the R&D technology and production capacity of the manufacturer, which can help users to better choose high and low temperature test boxes.
what are the characteristics of high and low temperature test boxes?
Today, Xiaobian will tell you about the characteristics of the high and low temperature test box. In fact, many users have only heard of this equipment but have no detailed understanding. The following Xiaobian will talk about the characteristics of the high and low temperature test box, hoping to help users better purchase or use this equipment.
1. The door, working room and shell are equipped with high-temperature resistant sealing strips and pressing devices to effectively ensure the sealing and thermal insulation performance of the box.
2. The temperature controller of the high and low temperature test box adopts high-quality instruments with PID adjustment, SSR output and fast self-tuning digital display.
3. There are over-temperature protection, overload protection and short-circuit protection of control circuit.
4. The studio and the sample rack are made of stainless steel, and the outer box is made of high-quality cold-rolled plate by plastic spraying.
5. The selection of foreign high-quality fully-enclosed compressors for the refrigeration system can ensure the low-temperature stability of the high-low temperature test box. Daily maintenance of high and low temperature test box and simple test of main technical indexes can ensure the work of high and low temperature test box in good condition.
In fact, when users buy or use high and low temperature test boxes, they need to know the corresponding knowledge of this equipment in detail. Only in this way can they buy or use it quickly and conveniently.
how should the high and low temperature test chamber be tested correctly?
The high-low temperature test chamber is used for high-temperature or low-temperature tests of electricians, electronics and other products, parts and materials, to test the adaptability of their products when they are stored, transported and used in high-low temperature environment; The test method mainly depends on the test standard of GB/T1592-28. The method of temperature test includes: test procedure, location and quantity of test points, data processing and test results; I will talk about it in the following small series;
1. Test procedure of test points: within the adjustable range of the test box, select high nominal temperature and low nominal temperature, run the test box according to the procedure of low temperature first and then high temperature, the temperature at the central point of the test space reaches the test temperature and remains constant for 2 hours, and test the temperature of all test points once every minute for 3 minutes, ***3 times;
2. Location of test points: three horizontal test surfaces, namely upper, middle and lower, are defined in the test space, which are referred to as upper layer, middle layer and lower layer for short; The distance between the top surface of the upper layer studio is one tenth of the height of the studio, the middle layer passes through the geometric center of the studio, and the bottom is 1 mm above the lower layer sample rack; The test points are located on three time planes, the central test point is located in the geometric center of the studio, and the distance between the other test points and the wall of the studio is one tenth of their respective side lengths, but for the test box with the volume of the studio not more than 1.3 meters, Goguryeo is not less than 5 mm;
3. the number of test points: the relationship between the number of test points and the volume of the studio is as follows: a. when the volume of the studio is not more than 2m3, there are 9 temperature test points; B. When the volume of the studio is more than 2m3, there are 15 temperature test points; c. When the volume of the studio is more than 5m3, the number of temperature and humidity test points can be appropriately increased;
what is the purpose of the high and low temperature test chamber?
The high and low temperature test chamber has the law of simulating the temperature change in the atmospheric environment. It is mainly used for the adaptability test of electricians, electronic products, their components and other materials when they are transported and used in high-temperature and low-temperature comprehensive environment. Used in product design, improvement, identification and inspection. It is suitable for the reliability test of industrial products at high temperature and low temperature. The parts and materials of electronic and electrician, automobile and motorcycle, aerospace, ship weapons, colleges and universities, scientific research units and other related products are tested under the condition of high temperature and low temperature cycle changes.
Xiamen Deyi Equipment Co., Ltd. specializes in producing environmental test equipment. The company's DEG-15 high and low temperature test chamber prohibits the testing and storage of samples of flammable, explosive and volatile substances, corrosive substances, biological samples and strong electromagnetic emission sources.
what is a high and low temperature test chamber?
First of all, the high and low temperature test chamber is a box for experiments, which is used to test the high temperature and low temperature resistance of products;
applicable industries include: electronics, components, circuit boards, communications, LEDs, LCD screens, instruments and meters, capacitors, vehicles, medicines, plastics, metals, chemistry, building materials, aerospace and other products for quality inspection and for scientific research units in universities.
how does the high and low temperature constant temperature test chamber operate?
The high and low temperature constant temperature test chamber is a kind of common test chamber commodity, and the key is the adaptability experiment of welders, electronic equipment, their electronic devices and other raw materials when they are transported and applied in high temperature and ultra-low temperature comprehensive natural environment.
1. Normalization treatment
Place the test sample under the normal experimental air standard until the temperature exceeds the normal level.
Second, the original inspection
The whole process of high and low temperature impact test box experiment:
1. Put the specified materials in the test box, and raise the temperature in the test box to 7℃ for 1h or until the temperature of the test sample exceeds the stable level, whichever is longer.
2. After the high-temperature link is completed, transfer the experimental sample to the low-temperature test box adjusted to -55℃ within 5 minutes, and keep it for 1 hour or until the experimental sample exceeds the temperature and is stable, whichever is longer.
3. After the ultra-low temperature link is completed, transfer the test sample to a high-temperature test box adjusted to 7℃ within 5 minutes, and keep it for 1 hour or until the test sample exceeds the temperature and is stable, whichever is longer.
4. Repeat the test mode for 3 cycle times. .
3. Repair the tested sample after the experiment
After the test sample is removed from the experimental box, it should be repaired under the normal experimental air standard until the temperature of the test sample exceeds the stable level.