product manual
The destruction of materials by sunlight and moisture in the natural world causes unpredictable economic losses every year. The ultraviolet light accelerated weathering test machine can reproduce the damage caused by sunlight, rain and dew. The equipment conducts the test by exposing the material to be tested in a controlled alternating cycle of sunlight and moisture while increasing the temperature. The equipment uses ultraviolet fluorescent lamps to simulate sunlight, and can also simulate the effect of moisture through condensation or spraying.
It only takes a few days or a few weeks, and the device can reproduce the damage caused by outdoor months or years. The damage caused mainly includes discoloration, discoloration, decreased brightness, chalking, cracking, blurring, embrittlement, reduced strength and oxidation. The test data provided by the equipment is of great help in the selection of new materials, the improvement of existing materials or the evaluation of composition changes that affect the durability of products. The device can excellently predict the changes the product will encounter outdoors.
Simulation of ultraviolet (UV) and sunlight
Although ultraviolet light (UV) only accounts for 5% of sunlight, it is the main lighting factor that causes the durability of outdoor products to decrease. This is because the influence of sunlight's photochemical reaction increases with decreasing wavelength. Therefore, when simulating the impact of sunlight on the physical properties of materials, there is no need to reproduce the entire sunlight spectrum. In most cases, you only need to simulate short-wave UV light.
The reason why the ultraviolet light accelerated weathering test machine uses UV lamps is that they are more stable than other lamps, and can better reproduce the test results. Using fluorescent UV lamps to simulate the effects of sunlight on physical properties, such as brightness reduction, cracking, and flaking, is the best method. There are several different UV lamps to choose from. Most of these UV lamps mainly produce ultraviolet light instead of visible light and infrared light. The main difference between lamps is the total UV energy they produce in their respective wavelength ranges. Different lamps will produce different test results. The actual exposure application environment can prompt which type of UV lamp should be used.
Brief Introduction of Environmental Test Equipment
The earth provides space for mankind to survive, but the harsh natural environment also challenges mankind. Mankind came to earth tens of thousands of years ago, continually fought against nature, and finally gradually adapted to the environment in which they lived, and continued to multiply, thus creating a splendid civilization.
Humans have continuously evolved and created various advanced tools to adapt to the surrounding environment. At the same time, various advanced tools that people use are also being tested by the natural environment. The cycle of the four seasons of spring, summer, autumn and winter on the earth constantly brings people high temperature, low temperature, humidity, rainfall, storm, dust, strong light, flood and other harsh natural conditions. As a result, the tools created by people are constantly being updated and new products are emerging. People expect to produce tools that are most suitable for various environments to help humans adapt to and ultimately transform this harsh environment.
People work hard to create, in the process of product updating, people finally find that to produce the most adaptable product to the environment, the materials or components of the manufactured product must first be tested by the environment. As a result, various environmental test equipment appeared. They can simulate the harshest natural conditions of the outside world in the shortest time, even more severe. Before the materials or components tested by this equipment are made into products, we already know whether they are suitable.
Environmental testing is already an indispensable procedure in the production process. After research, Scientist has manufactured high and low temperature damp heat equipment that simulates temperature and humidity; salt spray corrosion test equipment that simulates the corrosive climate of the ocean; various rain and waterproof equipment that simulates rain; various photoaging that simulates light Test equipment; equipment to simulate the weather of sand and dust storms, etc. There are also test equipment that simulates harmful substances such as sulfur dioxide, ozone, etc. produced in industrial manufacturing.
Sunshine is the guarantee for the survival of any living thing on earth, it brings light and warmth. However, excessive light and steam generated by the light can also cause harm, especially causing serious damage to the production materials and products, causing annual economic losses that are difficult to estimate. Damage mainly includes discoloration, yellowing, discoloration, reduced strength, embrittlement, oxidation, decreased brightness, cracking, blurring, and chalking. Products and materials that are directly exposed to sunlight have the greatest risk of being damaged by light.
In order to adapt to the future products and ultimately resist the destruction of sunlight and moisture, we use xenon lamp weather resistance test equipment and ultraviolet light weather resistance test equipment.
Xenon lamp weather resistance test equipment uses a xenon arc lamp that can simulate the full sunlight spectrum to reproduce the destructive light waves existing in different environments. This equipment can provide corresponding environment simulation and accelerated test for scientific research, product development and quality control.
Xenon lamp weather resistance test equipment can be used for the selection of new materials, improving existing materials or evaluating changes in durability after changes in material composition. The equipment can well simulate the changes caused by the material exposed to sunlight in different environmental conditions. The equipment measures the light resistance of the material by exposing it to ultraviolet (UV), visible and infrared light. It uses a filtered xenon arc lamp to produce a full sunlight spectrum that has the greatest agreement with sunlight. Xenon arc lamp with reasonable filtering treatment is the best way to test the sensitivity of the product to the longer wavelength ultraviolet and visible light in direct light or sunlight through the glass.
When you expose the product to direct sunlight outdoors, the time that the product experiences maximum light intensity during a day is just a few hours. Even so, the most severe exposure occurs only in the hottest weeks of summer. Xenon lamp weather resistance test equipment can speed up your test process, because through the program control, the equipment can expose your product to the sunshine environment equivalent to the summer noon sunlight 24 hours a day. The exposures experienced were significantly higher than outdoor exposures in terms of average light intensity and light hours / days. Thus, the test results can be accelerated.
Due to long-term exposure to fluorescent lamps, halogen lamps or other light-emitting lamps, products placed in retail locations, warehouses or other environments will also experience significant photodegradation. Xenon lamp weather resistance test equipment can also simulate and reproduce the destructive light generated in such commercial lighting environments, and can accelerate the test process with higher intensity.
The device uses a full-spectrum xenon arc lamp to simulate the destructive light waves in sunlight, including UV, visible and infrared light. Depending on the desired effect, the light from the xenon lamp is usually filtered to produce a suitable spectrum, such as the direct sunlight spectrum, the sunlight spectrum through the glass window, or the UV spectrum. Each filter will produce a different light energy distribution.
Light irradiance refers to the ratio of light energy irradiated on a plane. The equipment must be able to control the intensity of light irradiation in order to achieve the purpose of accelerated testing and reproduction of test results. Changes in light irradiance will affect the rate of deterioration of the material quality, while changes in the wavelength of light waves (such as the energy distribution of the spectrum) will also affect the rate and type of material degradation.
The irradiation of the equipment is equipped with a light-sensing probe, also known as the sun eye, a high-precision light control system, which can compensate for the drop in light energy caused by the aging of the lamp or any other changes in time. The solar eye allows the selection of appropriate light irradiance during the test, and even the light irradiance equivalent to the summer noon sunlight. The solar eye can continuously monitor the light irradiance in the irradiation room, and can accurately maintain the irradiance at the working set value by adjusting the power of the lamp tube. Due to long working hours, when the irradiance drops below the set value, a new lamp needs to be replaced to ensure normal irradiance.
The service life of the lamp depends on the level of irradiance used, and the life of the lamp is generally 1000 hours. Lamp replacement is quick and easy. Long-acting filters provide a guarantee for maintaining the required spectrum.
In addition to the photodegradation test, the xenon lamp weather resistance test equipment can also simulate the damage of outdoor moisture to the material by adding moisture and water spray options. Moisture is also the main factor that causes damage to some materials. The higher the moisture content, the faster the damage to the material. Humidity can affect the degradation of indoor and outdoor products, such as various textiles. This is because when the material tries to maintain a moisture balance with the surrounding environment, the physical stress on the material itself increases. Therefore, as the humidity range in the atmosphere increases, the overall stress on the material is greater. The negative impact of humidity on the weather resistance and colorfastness of materials has been widely recognized. The moisture function of this device can simulate the effect of indoor and outdoor moisture on materials. The device provides relative humidity control. For many materials that are sensitive to humidity, this function is very important, and many test protocols also require humidity control. Using the water spray function greatly expands the climatic and environmental conditions that the device can simulate.
Due to frequent erosion from rain, the paint layer of wood, including paint and colorants, will appear to corrode accordingly. This rain erosion action can wash away the paint layer with anti-degradation effect on the surface of the material, thereby directly exposing the material itself to the destructive influence of UV and moisture. The rain spray function of this equipment can reproduce this kind of environmental conditions to enhance the relevance of some paint weathering tests. The spraying cycle is completely controlled by the program and can be carried out with or without light cycle. In addition to simulating the degradation of materials caused by moisture, it can also effectively simulate rapid temperature changes and rain erosion processes.
Outer coatings on roofs, car parts, and metal buildings or components will experience sudden temperature changes. For example, the hot summer causes the heat inside the material to accumulate, while sudden showers will quickly dissipate the heat. This violent temperature change shock is a challenge and test for many materials. The effect of this environmental condition on the material can be reproduced through the water spray function of the device. The infrared rays emitted from the lamp tube can rebuild the heat accumulation process, and the cold water spray has the effect of drastic temperature changes. During the rain spray cycle, the temperature is not controlled.
The water quality of the water spray circulation system is deionized water (solid content is less than 20ppm). It has the water level of the storage tank. Two spray heads are installed on the top of the studio. The sprayed water is recyclable. Adjustable.
The equipment heating system adopts far infrared nickel-chromium alloy high-speed heating electric heater; high temperature, humidity, and light are completely independent systems (no interference with each other); temperature control output power is calculated by microcomputer to achieve high precision and high efficiency power efficiency .
The equipment humidification system adopts an external boiler steam humidifier, with automatic water level compensation, water shortage alarm system, far infrared stainless steel high-speed heating electric heating tube, humidity control using P.I.D + S.S.R, the system is coordinated with the channel control.
Ultraviolet weather resistance test equipment is another type of photoaging test equipment that simulates light, which mainly simulates ultraviolet light in sunlight. It can also reproduce the damage caused by rain and dew. The equipment conducts the test by exposing the material to be tested in a controlled alternating cycle of sunlight and moisture while increasing the temperature. The equipment uses ultraviolet fluorescent lamps to simulate sunlight, and can also simulate the effect of moisture through condensation or spraying.
It only takes a few days or a few weeks, and the device can reproduce the damage caused by outdoor months or years. The damage caused mainly includes discoloration, discoloration, decreased brightness, chalking, cracking, blurring, embrittlement, reduced strength and oxidation. The test data provided by the equipment is of great help in the selection of new materials, the improvement of existing materials or the evaluation of composition changes that affect the durability of products. The device can excellently predict the changes the product will encounter outdoors.
Although ultraviolet light (UV) only accounts for 5% of sunlight, it is the main lighting factor that causes the durability of outdoor products to decrease. This is because the influence of sunlight's photochemical reaction increases with decreasing wavelength. Therefore, when simulating the impact of sunlight on the physical properties of materials, there is no need to reproduce the entire sunlight spectrum. In most cases, you only need to simulate short-wave UV light. The reason why the ultraviolet light accelerated weathering test machine uses UV lamps is that they are more stable than other lamps, and can better reproduce the test results. Using fluorescent UV lamps to simulate the effects of sunlight on physical properties, such as brightness reduction, cracking, and flaking, is the best method. There are several different UV lamps to choose from. Most of these UV lamps mainly produce ultraviolet light instead of visible light and infrared light. The main difference between lamps is the total UV energy they produce in their respective wavelength ranges. Different lamps will produce different test results. The actual exposure application environment can prompt which type of UV lamp should be used.
UVA-340, the best choice to simulate sunlight ultraviolet
UVA-340 can perfectly simulate the sunlight spectrum in the critical short-wavelength range, that is, the spectrum in the wavelength range of 295-360nm. UVA-340 only produces the spectrum of UV wavelengths found in sunlight.
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