The reason why UV Accelerated Weather Tester uses UV lamps is that they are more stable than other lamps and can better reproduce the test results. It is a good method to use fluorescent UV lamps to simulate the influence of sunlight on physical properties, such as brightness reduction, cracking, peeling, etc. Although ultraviolet light (UV) only accounts for 5% of the sunlight, it is the main light factor that causes the durability of outdoor products to decline. This is because the photochemical effect of sunlight increases with the decrease in wavelength. Therefore, it is not necessary to reproduce the entire sunlight spectrum when simulating the destructive effect of sunlight on the physical properties of materials. In most cases, you only need to simulate short-wave UV light.
UV Accelerated Weathering Tester uses an ultraviolet fluorescent lamps simulating the spectrum of UV section in the sun and combines temperature control and humidity supply devices to conduct climate change tests on materials to evaluate the weather resistance of materials.
QISNUN instrument engineer said that UV Accelerated Weather Tester can have several different UV lamp tubes to choose from. Most of these UV lamps mainly produce ultraviolet light instead of visible and infrared light. The main difference between lamps is the difference in the total UV energy generated by them in their respective wavelength range. Different lights will produce different test results. The actual exposure application environment can prompt which type of UV lamp should be selected (UVA340 UV lamp is used for general material aging).
UVA-340 is a good choice to simulate the ultraviolet rays of the sun. It only produces the spectrum of UV wavelength that can be found in the sun.
UVA-340 can simulate the sunlight spectrum in the critical short-wave wavelength range, that is, the spectrum in the wavelength range of 295-360nm, UVB-313, which is used for a large degree of accelerated test and can provide test results quickly. The short wavelength UV they use is stronger than the UV light wave commonly found on the earth at present. Although this UV light, which is much longer than the natural wave length, can greatly accelerate the test, it will also cause inconsistent and actual degradation damage to some materials.
The advantages of the UV lamps used in the UV aging test chambers are as follows: quickly obtaining test results; Simplified illumination control; Stable spectrum; Little maintenance is required; The price is cheap and the operation cost is reasonable.