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Talk about the working principle of violent weather test chamber

2021-11-26

UV closing test chamber is an electronization test of another analog light Equipment, it mainly simulates ultraviolet light in the sun. At the same time, it can still reproduce the damage caused by rain and dew. UV weathering test chamber By exposing the material to be tested in the interaction cycle of controlled sunlight and moisture, the test is improved. The equipment is used as an ultraviolet fluorescent lamp to simulate the sunlight, and the moisture effect can be simulated by condensation or spraying.

only takes a few days or weeks, UV weathering test chamber
can be reproduced outdoors The destruction produced in several months or years. The damage caused, mainly including fading, discoloration, brightness, powder, crack, variation, embrittlement, strength decrease, and oxidation.
Test data provided by UV weathering test chamber

has great help in the selection of new materials, improved the improvement of existing materials, and the analysis of durability of product durability. The equipment can be excellent to predict changes in the product will experience outdoors.

Although UV (UV) only accounts for 5% of the sun, it is caused outdoor products The main illuminance of durability declines. Thisbecause the photochemical reaction of the sun increases as the wavelength is reduced. Therefore, in the influence of the simulated sunlight to the damage of the physical properties of the material, it is not necessary to reproduce the entire sun spectrum. In most cases, only the UV light of the simulated short wave is needed. The reason why UV speeds of weathering testing machines uses UV lamps is that they are more stable than other lamps and better reproduce test results. The influence of the fluorescent UV lamp simulates the influence of the sun on the physical properties, such as low brightness, crack, peeling, etc., is a good method. There are several different UV lights to choose from. Most of these UV lamps mainly generate ultraviolet light instead of visible light and infrared light. The main differences of lamps are embodied in their difference in the total UV energy generated within their respective wavelengths. Different lights will produce different test results. The actual exposure application environment can prompt which type of UV lamp should be used.

UVA-340, a * preferred choice of sunshave ultraviolet lines UVA-340 can excellently simulate critical short wave wavelength range The sunlight spectrum, that is, the wavelength range of 295-360 nm, UVA-340 generates only the spectrum of the UV wavelength found in the sun.

UVB-313, for * large degrees of acceleration test


UVB-313 can Test results quickly quickly. The short-wavelength UV used in them is more intense than the UV optical waves that are often found on the earth. Although these UV lights larger than natural wavelengths can * largely accelerate the test, it also does not match and actually degraded certain materials.

The standard defines a fluorescent UV lamp that emits light energy below 300 nm below the total output light energy, Usually referred to as UV-A lamp; light energy of 300 nm or less is greater than 10% of total output light energy, is often referred to as UV-B lamp;

UV-A wavelength range is 315-400 nm; UV-B wavelength range is 280-315 nm;


The time of the outdoor materials and moisture are in contact with moisture, which can be 12 hours per day, and the results show that the main reason for this outdoor damp is dew, not rain. Ultraviolet accelerated weathering test machine simulates outdoor moisture effects through a series of unique condensation principles. In the condensed circulation circle of the device, there is a water tank at the bottom of the casing, and it is heated to generate water vapor. The thermal steam is maintained at 100% relative humidity in the test chamber and maintains a relatively high temperature. The product design ensures that the test piece actually constitutes the side wall of the test chamber, so that the back of the test piece is exposed to the indoor environmental air. The cooling effect of indoor air causes the surface temperature of the test piece to fall below the level of the steam temperature. This temperature difference causes the test piece to have a condensed liquid water in the entire condensation cycle process. This condensate product is very stable and pure distilled water. This pure water increases the reproducibility of the test, while avoiding water stains.


Since the outdoor exposure contact moist time can be 12 hours per day, the ultraviolet light accelerates the moisture testing machine The cycle is generally last for hours. We recommend that each condensation cycle lasts for at least 4 hours. Note that UV exposure and condensation exposure in the device are performed separately, consistent with actual climatic conditions.

For some application processes, water spray can better simulate * The environmental conditions used. Water sprayLynews Analog is extremely useful due to temperature dramatic and mechanical erosion caused by rainwater. UV acceleration weather testing machine / sprinkle type is specifically designed to reproduce this condition.


Since the coating layer of the wood from the rain is often, the paint and colorant, including the paint and colorant, there will be corresponding Erosion phenomenon. Recent studies have shown that this rainwater brushing action can brush away from the surface of the material surface, thereby directly exposing the material itself under the destructive effect of UV and moisture. This process can repeat multiple times, resulting in a material degradation, while alone is unproducible.

The advantage of the fluorescent lamp is that the test results are obtained quickly; the simplified lightweight control; stable spectroscopy; only very small Maintenance; low price, reasonable operating costs.

There is only a few parts on the land on the earth, and a large area is the ocean, so the marine climate is human life. A climate environment that affects material products.

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