QUV UV aging test chamber product parameters for various models

Lighting simulation

The QUV ultraviolet aging test chamber uses fluorescent ultraviolet lamps to simulate the damage caused by sunlight to durable materials. For different application conditions, different spectra and types of lamps are required. The UVA-340 lamp has a good simulation effect on the ultraviolet short band of sunlight.

The spectral energy distribution (SPD) of UVA-340 matches the solar spectrum very well in the range from the cut-off point of sunlight to approximately 360 nm, making it the best simulation of the ultraviolet short wavelength of sunlight among all lamps.

UV-B type lamps are also widely used in QUV ultraviolet aging test chambers. They cause material aging faster than UV-A type lamps, but their shorter wavelength than the cut-off point of sunlight may result in unrealistic outcomes for many materials.

Comparison of lamp tubes used in QUV UV aging test chamber with natural UV environment

Irradiance control

It is necessary to control the irradiance (light intensity) in order to achieve * * and reproducible test results. Most models of QUV UV aging test chambers are equipped with daylight vision controllers. This * * light control system provides users with the convenience of selecting irradiance levels. By utilizing the feedback loop system of the daylight eye, the irradiance can be continuously and automatically controlled and maintained. The daylight eye automatically compensates for changes in light intensity caused by lamp aging and other factors by adjusting the power of the lamp.

Wet simulation

The sink at the bottom of the testing room is heated to generate steam. At higher temperatures, hot steam maintains a relative humidity of 100% in the testing chamber. In the QUV UV aging test chamber, the test sample actually forms the sidewall of the testing chamber. The other side of the sample is exposed to the surrounding air indoors. The relatively cold indoor air causes the surface of the test sample to be several degrees lower than the temperature of the hot steam inside the testing room. This temperature difference creates a condensation cycle phenomenon where liquid water on the surface of the sample slowly condenses.

QUV UV aging test chamber (all models) simulates outdoor moisture erosion through a realistic condensation system

In addition to the standard condensation function, the QUV/spray UV aging test chamber can also simulate the effects of rainwater, such as thermal shock or mechanical erosion, by spraying water. Users can operate the QUV aging test chamber to generate a moisture cycle accompanied by ultraviolet radiation, which is very similar to natural aging.

QUV/Spray UV Aging Test Chamber Sample Capacity

Each standard test sample rack can be equipped with two 3-inch x 6-inch (75 x150 mm) standard test base plates. The test template actually constitutes the outer wall of the testing room. In order to enclose the testing room, each sample rack should be equipped with test samples or empty boards and placed correctly.

For water requirements:

1. Purity of water:

To use the spray function and prevent spots, ASTM G151, ISO 11341, and GB16422.3 require soluble substances to be less than 1.0ppm, suspended silicon content to be less than 0.2ppm, and water resistivity to be higher than 200 k Ω - cm. This requires deionization, distillation, or reverse osmosis systems and filters. Low purity water can generate dirt or clog the nozzle on the surface of the sample. All pipes, valves, or connectors between the pure water machine and the QUV UV aging test chamber/slide instrument must be made of stainless steel or plastic materials, and materials such as iron, steel, copper plating, etc. should not be used. ）The pH value of water is between 6.0 and 8.0.

2. Water pressure:

To perform spraying: The water pressure needs to be at least 25 psi (172 kPa) in order for the spraying water to spread across the surface of all test samples. *The high water pressure cannot exceed 80 psi (550 kPa)

3. Water flow rate:

If spraying is required: the water consumption is 7 liters per minute.

What standards do they meet

Compliant with ISO, ASTM, DIN, JIS, SAE, BS, ANSI, GM, U.S.GOVT and other standards and national standards.

general

ASTM G151、 ASTM G154、 JIS D 0205、 SAE J2020

paint

ASTM D3794、 ASTM D4587、 FED-STD-141B、 GM 9125P、 JIS K 5600-7-8、 ISO 11507、 ISO 20340、 M598-1990、 NACE TM-01-84、 NISSAN M0007、 PrEN 927-6

plastics

ANSI C57.12.28、 ANSI, A14.5、 ASTM D4329、 ASTM D4674、 ASTM D5208、 ASTM D6662、 DIN 53 384、 ISO 4892-3、 JIS K 3750、 UNE 53.104

Roof material

ANSI/RMA IPR-1-1990、 ASTM D4799、 ASTM D4811、 ASTM D3105、 ASTM D4434

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