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Radiation intensity of the UV aging test chamber

Author:QINSUN Released in:2023-08 Click:112

The UV aging test chamber is a test equipment independently developed and produced by our company qisnun Precision Electromechanical Technology Co., Ltd. The xenon lamp tube output will degrade over time. The automatism of the automatic servo loop of the xenon lamp aging box compensates for this. Staff can preset the radiation intensity level, and the radiation intensity sensor in the test box accurately measures the light source. When aging of the lamp tube causes output attenuation, the instrument panel automatically compensates by increasing the output power of the xenon lamp.

In theory, the irradiance of the light source can be monitored at any position of the xenon arc spectrometer, but multiple wavelength bands are used. Radiation manipulation is usually performed in areas where the mamaterial is sensitive to the spectrometer (for example, where dissolution is likely to occur). Moreover, the reference point of radiation intensity also changes due to different fields and applications.

The 420 nm reference point is usually associated with the glass window filter device to test the light stability of materials first in the room. For 420nm operation, it is necessary that the ultraviolet light sensor be equipped with a filtering device, which only allows rapid passage of ultraviolet light centered at 420nm. The target of this functional test is usually that critical raw material which is destroyed by long wave ultraviolet light and visible light. Such as dyes and melanin in textiles, printing paper and printing inks. A Simulated Common Radiant Intensity Setpointin a xenon arc aging test chamber is 1.10 W/m2.

The 340 nm reference point is widely used in high and low temperature accelerated tests. For high and low temperature testing of products with outdoor performance, the medium and short wave ultraviolet region is a risk factor. The 340nm operation requires a UV sensor equipped with a filter which only allows a narrow bandwidth with 340nm as a witness. Generally, this is an ideal reference for paints, plastics, roofing materials, etc. A common reference for radiation intensity is 0.35 or 0.55 W/m2.

UV aging test chambers are usually equipped with an automatic control system with variable radiation intensity of 340 nm or 420 nm. According to different model specifications. Some test chambers may use broadband TUV (detailed ultraviolet, 300-400 nm) or a detailed broadband (280-800 nm) radiation intensity sensor. Broadband sensors are unresponsive to relatively small changes in UV light, and this insensitivity can cause problems for important dissolution mechanisms driven in part by short-wave UV light in the spectrometer.

Generally speaking, the xenon lamp aging test chamber contains an automatic equal feedback control loop radiation intensity control system. It is recommended to replace the lamp tube in time, which will reduce the risk of tube aging. The amount of spectrometer shifts in specific regions is further reduced by manipulating the radiation intensity at the 340 nm or 420 nm sensors depending on the application.

Shanghai Fanbiao Textile Testing Technology Co., Ltd.As an enterprise integrating R&D, manufacturing andn, sales, training and service, it is committed to continuously providing more test instruments to the market, providing non-standard customization is acceptable, and targeted testing can be carried out according to requirements of the customer before purchase to ensure that the instruments purchased are suitable.