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5 Xenon Lamp Test Conditions And Standard

Principle of Xenon Lamp Test Chamber

Sunlight is the guarantee for the survival of any living thing on earth, bringing light and warmth. However, excessive light and steam generated by light can also cause damage, especially to the production of materials and products, causing unpredictable economic losses each year. The damage mainly includes fading, yellowing, discoloration, strength reduction, embrittlement, oxidation, brightness decrease, cracking, blurring and chalking. For products and materials that are exposed directly to the sun, they are at greatest risk from photodamage.
For future products to adapt and ultimately resist the damage of sunlight and moisture, we use a xenon lamp weatherproof test chamber and an ultraviolet weather resistant test chamber.
The xenon lamp weatherproof test chamber uses a xenon arc lamp that simulates the full sunlight spectrum to reproduce destructive light waves in different environments. This equipment can provide environmental simulation and accelerated testing for scientific research, product development and quality control.
The xenon lamp weatherproof test chamber can be used for the selection of new materials, to improve existing materials or to evaluate changes in durability after changes in material composition. The equipment is a good model for simulating changes in the material exposed to sunlight under different environmental conditions. The device measures the lightfastness of the material by exposing the material to ultraviolet (UV), visible light and infrared light. It uses a filtered xenon arc lamp to produce a full sunlight spectrum that is most consistent with sunlight. Xenon arc lamps that are properly filtered are a means of testing the product's sensitivity to longer wavelengths of ultraviolet and visible light in direct sunlight or through the sunlight of the glass.
When you expose the product to direct sunlight outdoors, the time it takes for the product to experience maximum light intensity during the day is a few hours. Even so, the most severe exposures only occur during the hottest weeks of the summer. Xenon weather-resistant test equipment can speed up your testing process, because through program control, the equipment can expose your product 24 hours a day in the light of the summer noon sunshine. The exposure experienced was much higher than the outdoor exposure in terms of average light intensity and hours/days of illumination. Thus, the test results can be accelerated.
Products placed in retail outlets, warehouses, or other environments will also experience significant photodegradation due to prolonged exposure to fluorescent, halogen, or other illuminating lamps. Xenon weathering test equipment can also simulate the reproduction of destructive light generated in such commercial lighting environments and accelerate the testing process with higher intensity.
The device uses a full-spectrum xenon arc lamp to simulate destructive light waves in the sun, including UV, visible, and infrared light. Depending on the desired effect, the xenon lamp light is typically filtered to produce a suitable spectrum, such as a direct sunlight spectrum, a sunlight spectrum through a glass window, or a UV spectrum. Each filter produces a different distribution of light energy.
Light irradiance refers to the ratio of light energy that is incident on a plane. The equipment must be able to control the irradiance of the light to achieve the purpose of accelerating the test and reproducing the test results. Changes in light irradiance affect the rate at which material quality deteriorates, while changes in the wavelength of light waves (such as the energy distribution of the spectrum) also affect the rate and type of material degradation.
The irradiation of the device is equipped with a light-sensing probe, also known as the sun eye, a high-precision light control system that compensates for the timely reduction of light energy caused by lamp aging or any other change. The sun's eye allows for the selection of the appropriate light irradiance during the test, and even the irradiance equivalent to the summer midday sun. The sun's eye can continuously monitor the irradiance in the irradiation chamber and can accurately maintain the irradiance at the set value by adjusting the power of the tube. Due to long hours of work, when the irradiance drops below the set value, a new lamp needs to be replaced to ensure the irradiance is normal.
The life of the lamp depends on the level of irradiance used, which is typically 1000 hours. The replacement of the lamp is convenient and quick. Long-lasting filters provide protection against the required spectrum.
In addition to photodegradation testing, xenon lamp weathering test equipment can also simulate the effects of outdoor moisture on the material by adding moisture and water spray options. Moisture is also a major factor in the destruction of 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 the physical stress experienced by the material itself increases as the material attempts to maintain a moisture balance with the surrounding environment. Therefore, when the humidity range in the atmosphere is larger, the overall stress that the material is subjected to is greater. The negative effects of humidity on the weatherability and non-fading properties of materials have been widely recognized. The moisture function of this device simulates the effects of moisture inside and outside the material on the material. The device provides relative humidity control, which is important for many moisture sensitive materials, and many test protocols require humidity control. The use of water spray function greatly expands the climatic conditions that the equipment can simulate.
Due to the frequent scouring from rain, the coating layer of wood, including paints and colorants, will show signs of erosion. This rain scouring action flushes the coating layer with anti-degradation on the surface of the material, thereby directly exposing the material itself to the destructive effects of UV and moisture. The rainwater spray function of this device reproduces this environmental condition to enhance the relevance of certain paint weathering tests. The spray cycle is completely programmed and can be performed with or without a light cycle. In addition to simulating the degradation of materials caused by moisture, it can also effectively simulate temperature drastic changes and rain erosion processes.
Exterior coatings on roofs, automotive parts, and metal buildings or components experience sudden temperature changes. For example, the hot summer causes the heat inside the material to accumulate, and the sudden showers cause the heat to dissipate quickly. 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 by the water spray function of the device. The infrared rays emitted from the lamp can rebuild the heat accumulation process, while the cold water spray produces the effect of temperature drastic changes. During the rain spray cycle, the temperature is not controlled.
The water quality of the water spray system uses deionized water (solid content less than 20ppm), which has the water level of the storage tank. Two nozzles are installed at the top of the working chamber. The sprayed water has recyclability, and the water spray pressure is between 0.12 and 0.15Mpa. Adjustable between.
The equipment heating system adopts far-infrared nickel-chromium alloy high-speed heating electric heater; the high temperature, humidity and illumination are completely independent systems (do not interfere with each other); the temperature control output power is calculated by microcomputer to achieve high precision and high efficiency. .
The equipment humidification system adopts external boiler steam humidifier, with water level automatic compensation, water shortage alarm system, far infrared stainless steel high-speed heating electric heating tube, humidity control are all adopted P.I.D +S . S . R, system co-channel coordination control.

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