UV weathering test chamber

Ultraviolet lamp tubes: eight

Wavelength range: UV-A wavelength range is 315~400nm

Working life of light source: 2000h

Temperature range: RT+10 ℃～ 70 ℃

Temperature resolution: 0.1 ℃

Temperature uniformity:± 3℃

Temperature control mode: PID self-tuning temperature control mode

Humidity range:≥ 75%RH

Distance between test object and lamp center: 25~45mm

Standard: GB/T 14522-93 National Standard of the People's Republic of China Accelerated Test Method for Plastics, Coatings, Rubber Materials and Artificial Climate for Mechanical Industrial Products

Reference standards: ISO 4892, ASTM G151, G154, D4329, D4587, D4799, SAE J2020

Structure and material

1. Studio size: 450× 500× 1170 mm (depth× width× height)

2. Overall dimension: about D1200× W600× H1580mm

3. ◎ Liner material: SUS304 stainless steel plate

◎ Shell material: SUS304 stainless steel plate

4. Ultraviolet lamp tube: UVA-340 ultraviolet lamp tube, 8 pieces in total, 40W/piece

5. Water source and consumption: clean water or distilled water 8 liters/day (provided by the customer)

6. Control system:; TEMI880 touch screen, PLC programmable controller

Test equipment

1. The structure of the test chamber is made of corrosion-resistant metal materials, including 8 fluorescent ultraviolet lamps, test sample racks, temperature and time control systems and indicators< br />
2. The lamp power is 40W< br />
3. The lamps are installed in a row, and each switch controls four tubes, which are divided into two groups< br />
4. The test sample shall be fixed at the position 50 ㎜ from the nearest parallel plane of the lamp surface

The test chamber shall be placed in the test chamber with a temperature of 15~35 ℃, 300 ㎜ away from the wall, and shall be protected from the influence of other heat sources. The air in the test chamber shall not circulate strongly, so as not to affect the lighting and condensation conditions< br />
Test conditions

1. Place the test sample on the sample rack

2. Test temperature: RT+10~70 ℃ temperature can be adjusted during lighting, and the tolerance uniformity of temperature is± 3℃。< br />
3. Various cycle modes such as 4H light, 4H condensation or 8H light, 4H condensation can be selected for each condensation cycle of light< br />
4. After the first illumination of 400~450H, one or two lamps shall be replaced, and other lamps shall compensate for the loss caused by lamp aging according to lamp cycle and replacement method. This operation mode ensures that the service life of each lamp is 1600~2000H< br />
Test sample and performance evaluation

1. Evaluation of appearance: the evaluation of paint is mainly about the appearance. If necessary, plastic and rubber can also be evaluated. The inspection items are mainly gloss, color change, chalking, spots, blistering, cracks, dimensional stability, etc. Quantitative item detection shall be carried out with instruments as far as possible, such as glossmeter and colorimeter< br />
2. Evaluation of mechanical and other properties: the tensile strength, elongation and hardness of general rubber materials are measured, and the impact strength, elongation at break, tensile strength and bending strength of plastics are measured. If necessary, other performance test items can be specified< br />