Standard terminology of ultraviolet weather resistance test chamber
Ultraviolet weather resistance test chamber is suitable for aging test of non-metallic materials against sunlight and artificial light sources. What are the standard terms of the ultraviolet weather resistance test chamber? Let's take a look together.
UV-condensation test: test of fluorescent UV-Condensation type
A fluorescent ultraviolet lamp is used as a light source to simulate and strengthen the ultraviolet spectrum that has the most significant effect on the degradation of polymer materials. The temperature and humidity are appropriately controlled to periodically produce condensation on the sample.
Ultraviolet regions in the ultraviolet region are UV-A wavelength range of 315-400nm; UV-B wavelength range of 280-315nm; UV-C wavelength <280nm irradiation.
The fluorescent UV lamp is a low-pressure mercury lamp with a wavelength of 254nm. Due to the addition of phosphorus coexistence, it is converted into a longer wavelength. The energy distribution of the fluorescent UV lamp depends on the emission spectrum produced by the phosphorus coexistence and the transmission of the glass tube. Expand.
Irradiance The total amount of irradiance incident radiation at all wavelengths, expressed in W / m2. Because the radiation is distributed according to different wavelengths, the photochemical effects caused by different spectra are very different, so different lamp sources should not be used for comparison.
Spectral irradiance spectral irradiance is a function of irradiance as a function of wavelength, expressed in W / m2 for each band, usually the irradiance of daylight is expressed in W / m2 for each 10 nm band, and UV fluorescent lamps are used for every 1 or 2 nm It is indicated that the spectral charging is a suitable method for comparing light sources with different energy distributions.
The spectral energy distribution is a characteristic curve representing the irradiance at each wavelength. It can be expressed in terms of power in W / m2 or in terms of energy in J. This characteristic curve should include all the bands of the incident light, and the fluorescent ultraviolet Light is usually expressed in terms of relative spectral energy component distribution, which is expressed as the percentage of irradiance at each wavelength compared to the peak value.
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