UV weathering test chamber

UV weather resistance test chamberIt is an experiment that simulates the damage caused by external sunlight and moisture to the appearance and interior of a product. This product is mainly used for simulating environmental climate aging tests on non-metallic materials and organic materials (paints, coatings, rubber, plastics, etc.).

Simulate sunlight
The ultraviolet rays in sunlight are the main factor causing durability damage to most materials. We use ultraviolet lamps to simulate the short wave ultraviolet part of sunlight, which produces very little visible or infrared spectral energy. We can choose UV lamps with different wavelengths according to different testing requirements, as each lamp has different total UV irradiation energy and wavelengths. Usually, UV lamps can be divided into two types: UVA and UVB.
The UVA-340 lamp can best simulate the short wave spectrum between 365 nanometers and 295 nanometers, while the UVB-313 lamp has a wavelength range from 340 nanometers to 270 nanometers, which is a very short ultraviolet wavelength, shorter than the ultraviolet wavelengths currently found on the Earth's surface. Therefore, it can quickly provide test results, but at the same time, it may cause unrealistic damage to certain materials. UVA-351 simulates sunlight and ultraviolet light passing through window glass, which is most effective for testing the aging of indoor materials.
UV weather resistance test chamberWet environment
The vast majority of outdoor humidity is caused by dew, not rainwater. In the condensation cycle during the experiment, the water in the reservoir at the bottom of the testing chamber is heated to generate hot steam, which fills the entire testing chamber. The hot steam maintains the relative humidity in the testing chamber at 100% and maintains a relatively high temperature. The sample is fixed on the side wall of the testing chamber, so that the testing surface of the sample is exposed to the ambient air inside the testing chamber. The outward side of the sample exposed to the natural environment has a cooling effect, resulting in a temperature difference between the inner and outer surfaces of the sample. The occurrence of this temperature difference causes the sample to always have liquid water generated by condensation on its testing surface throughout the entire condensation cycle. Due to outdoor exposure to moisture for up to ten hours a day, a typical condensation cycle typically lasts for several hours.
temperature control
In each cycle, the temperature can be controlled at a set value. Meanwhile, the blackboard thermometer can monitor the temperature. The increase in temperature can accelerate the aging process, and temperature control is also important for the reproducibility of testing.

The UV weather resistance test chamber meets the standards:

GB/T14522-93、16422.3-97、ASTMG53

Structure:

The material of both the inner and outer boxes of the test chamber is made of SUS304 stainless steel plate, and the material of the sample rack is made of aluminum alloy in a grid style, which facilitates the storage and retrieval of samples.

The equipment adopts an automatic intelligent water replenishment and humidification system.

The UV lamp needs to be replaced with a new one after 500H of use.

UV weather resistance test box control system:

The test chamber is equipped with temperature, humidity, and test time settings and controls. The lighting time and condensation time are controlled by the Golden Bell Moller programmable controller (which can set and control the temperature and humidity time according to the required test conditions). The experimental process is automatically carried out according to the set values.

Main parameters:

1. Model: KL-ZN－P

2. Working size: 450X1170X500mm (standard)

3. Temperature range: RT 10~70 ℃

4. Temperature fluctuation: ± 0.5 ℃

5. Relative humidity: ≥ 93%RH

6. UV light source: UV-B (optional UV-A or UV-B)

7. Spectral wavelength: 280~340nm