Principle of xenon lamp test chamber

Sunlight is the guarantee for the survival of all living things on the earth, it brings light and warmth. However, excessive light and the steam generated by light can also cause harm, especially to the production of materials and products, and cause serious damage every year, causing an incalculable economic loss. The damage mainly includes fading, yellowing, discoloration, strength decrease, embrittlement, oxidation, brightness decrease, cracking, blurring and powdering. Products and materials that are directly exposed to sunlight are most at risk from the effects of light damage. In order for future products to adapt to and eventually resist the damage of sunlight and moisture, we use Xenon Lamp Aging Test Chamber and ultraviolet aging Test Chamber. Xenon arc lamps that can simulate the full spectrum of sunlight are used in the xenon lamp aging Test chamber to reproduce destructive light waves in different environments. The equipment can provide corresponding environmental simulation and accelerated testing for scientific research, product development and quality control. Xenon lamp aging test chambers can be used to select new materials, improve existing materials or evaluate changes in durability after changes in material composition. The equipment can well simulate the changes of materials 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 filtered xenon arc lamps to produce an all-sunlight spectrum with maximum agreement with sunlight. Xenon arc lamps with proper filtration are the best way to test the sensitivity of products to longer wavelength ultraviolet and visible light in direct light or sunlight through glass. When you expose your product to direct sunlight outside, the amount of time it experiences maximum light intensity is a few hours a day. Even so, the worst exposure occurs only during the hottest weeks of summer. Xenon weathering test equipment can speed up your testing process, because it can be programmed to expose your product 24 hours a day to the equivalent of summer noon sunlight. The exposure experienced is significantly higher than outdoor exposure in terms of average light intensity and light hours/days. Thus, the test results can be obtained faster. Due to long-term exposure to fluorescent lamps, halogen lamps or other luminous lamps, products placed in retail locations, warehouses or other environments will also experience significant photodegradation. The Xenon lamp aging test chamber can also simulate and reproduce the destructive light generated in such commercial lighting environments, and can accelerate the test process at a higher intensity. The device uses a full-spectrum xenon arc lamp to simulate destructive light waves in sunlight, including UV, visible and infrared light. Depending on the desired effect, xenon lamp light is usually filtered to produce a suitable spectrum, such as direct sunlight, sunlight through a glass window, or UV spectrum. Each filter produces a different distribution of light energy. Light irradiance is the ratio of light energy irradiated on a flat surface. The equipment must be able to control the intensity of light irradiation to achieve the purpose of accelerating the test and reproducing the test results. Changes in light irradiance affect the rate at which the material deteriorates, while changes in the wavelength of the light wave, such as the energy distribution of the spectrum, affect both the rate and type of material degradation. The device is irradiated with a light-sensing probe, or solar eye, a high-precision light-control system that compensates for any loss of light energy caused by aging or any other change in the lamp. The solar eye allows the appropriate light irradiance to be selected during the test, up to the equivalent of midday summer sunlight. The solar eye can continuously monitor the light irradiance in the irradiation chamber, and can accurately maintain the irradiance at the working set value by adjusting the power of the lamp. Due to the long working time, when the irradiance drops below the set value, a new lamp needs to be replaced to ensure the normal irradiance. The service life of the lamp depends on the irradiance level used, and the general life of the lamp is 1000 hours. Light tube replacement is convenient and quick. Long-acting filters provide assurance that the required spectrum is maintained. In addition to conducting photodegradation tests, xenon lamp aging test chambers can also simulate the damaging effects of outdoor moisture on materials by adding moisture and water spray options. Moisture is also the main factor causing damage to some materials, and the higher the content of moisture, the more it will accelerate the destruction of materials. 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, when the humidity range in the atmosphere is larger, the overall stress of the material is greater. The negative effect of humidity on the weatherability and colorfastness of materials has been widely recognized. The moisture function of this device can simulate the effect of indoor and outdoor moisture on the material. The device provides relative humidity control, which is important for many humidity-sensitive materials and is required by many test protocols. The use of water spray function greatly expands the climatic conditions that the equipment can simulate. Due to frequent erosion from rain, the coating layer of wood, including paints and colorants, will appear corresponding erosion phenomenon. This rain-washed action washes away the anti-degradation coating layer on the surface of the material, thereby exposing the material itself directly to the damaging effects of UV and moisture. The rain spray function of this equipment can reproduce such environmental conditions to enhance the relevance of climatic aging tests for certain coatings. The spray cycle is fully programmed and can be performed with or without a light cycle. In addition to simulating material degradation caused by moisture, it can also effectively simulate temperature changes and rain erosion processes. Outer coatings on roofs, car parts, and metal buildings or structures can experience sudden temperature changes. For example, a hot summer causes the heat inside the material to build up, and a sudden shower will cause the heat to dissipate quickly. This dramatic temperature change impact is a challenge and test for many materials. The effect of this environmental condition on the material can be reproduced through the water spraying function of the device. Infrared light emitted from the tubes reconstructs the heat build-up process, while cold water spraying produces a dramatic temperature change. The temperature is not controlled during the rain spray cycle. The water quality of the water spraying circulation system is deionized water (the solid content is less than 20ppm), with the water level display of the storage tank, and two nozzles are installed on the top of the studio, the water is recyclable, and the spray pressure is adjustable between 0.12 and 0.15Mpa. Equipment heating system adopts far-infrared nickel-chromium alloy high-speed heating electric heater; High temperature, humidity, light completely independent system (do not interfere with each other); The output power of temperature control is calculated by microcomputer to achieve high precision and high efficiency. Equipment humidification system adopts external boiler steam humidifier, with automatic water level compensation, water shortage alarm system, far infrared stainless steel high-speed heating tube, humidity control adopts P.I.D + S.S.R, the system coordinated control with the channel.