Uv weather testing machine

UV tower UV weather resistance testing machine

I. Overview

This product uses the fluorescent ultraviolet lamp that best simulates the UV spectrum of sunlight, and combines temperature control and humidity supply devices to simulate the high temperature, high humidity, condensation, dark rain cycle and other factors that cause discoloration, brightness, strength reduction, cracking, peeling, pulverization, oxidation and other damage to the material in the sunlight (UV segment). At the same time, through the synergistic effect between ultraviolet light and moisture, the single light resistance or single moisture resistance of the material is weakened or failed, which is widely used in the evaluation of the material's weather resistance. The equipment has the best sunlight UV simulation, low maintenance cost, easy to use, automatic operation of the equipment with control, high degree of automation of the test cycle, and good lighting stability. High reproducibility of test results.

Second, structural materials

1. Test chamber space: 1170×400×500

2. Overall size: 1300×550×1480

3, unit material: inside and outside 304 stainless steel

4, sample frame: aluminum alloy frame frame frame view plate

5. Controller: TEMI-880

6, irradiation tube: UVA-340 8 branches 4 branches per side, a total of 2 sides, can be single-side control

7, can use 100 groups of program, repeatable execution of up to 999 times, with power off program memory function, with time adjustment, appointment time, instrument can display temperature curve, can connect to the computer (optional)

8, power supply with leakage circuit breaker control circuit overload short-circuit alarm, overtemperature alarm, water shortage protection

3. Technical parameters

1. Temperature range: RT+10℃~70℃

2, humidity range: ≥90%

3, temperature uniformity: ±1℃

4, temperature fluctuation: ±0.5℃

5, the lamp center distance: 70mm

6, the test product and the lamp center distance: 50±3mm

7. Irradiance: adjustable within 1.0W/m2

8, light, condensation, spray test period can be adjusted

9, lamp: L=1200//40W, 8 (UVA service life more than 1600h)

10. Controller: RKC intelligent controller

11, temperature control mode: PID self-tuning SSR control

12. Standard specimen size: 75×270mm (special specifications should be specified in the contract)

13, sink water depth: 25mm automatic control

14, effective irradiation area: 900×270mm

15, ultraviolet wavelength: UVA range is 315-400nm;

16, test time: 0~999H (adjustable)

17, Power supply: 220V 3KW

18. Standard sample rack: 24 pairs

19, the unit has automatic spray function

4. Structure description

1, the box is made of CNC equipment, advanced technology, smooth lines, beautiful and generous

2, the box material is 1.2mm thick 304SUS high-grade stainless steel

3, the air duct in the box adopts a single circulation system, has an imported axial flow fan, improves the flow of air bright, heating ability, and greatly improves the temperature uniformity in the test box

4, lamps: special ultraviolet lamps, two rows of 8, 40W/

5, lamp life: 1600h (recommended time)

6, water source and consumption: tap water or distilled water about 8 liters/day

7. A total of 8 UVA UV lamps are installed on both sides of the studio

8, the heating method is the inner tank type heating, fast heating, uniform temperature distribution

9, box cover for two-way clamshell type, easy to close

10, the water level of the inner tank automatically replenishment, to prevent the heating pipe air burning damage

11. The sample rack is made of stainless steel or aluminum alloy

12. The bottom of the unit is fixed with high-quality PU movable wheels

13. The drainage system uses U-shaped sedimentation device to drain water

14. The surface of the test sample is parallel to the plane of the UV lamp

15. The sprinkler system is equipped with automatic sprinkler head and adjustable water pressure

Five, safety protection device

1, grounding protection

2, power overload short circuit breaker

3, control loop overload, short circuit fuse

4. Water shortage protection

5, over temperature protection

6. Temperature control

UV:

The first-order optical reaction is not sensitive to temperature change, however, the speed of the subsequent second-order reaction is closely related to temperature change. In general, as the temperature increases, the reaction speed will be accelerated, therefore, in the process of UV exposure test, temperature control is very important, and it is more important to match the test temperature used in the accelerated test with the highest temperature encountered in the practical application of the material. The temperature of the UV process in the equipment is set to any point between 50 ° C and 70 ° C, depending on the illuminance level and indoor ambient temperature. The temperature regulation of the equipment is completed by the controller with microcomputer calculation function to command the air heater, water heater and a series of systems in the equipment.

Moisture:

With the increase of temperature, the destructive force of moisture on the material will increase dramatically. Therefore, temperature control is the most basic requirement in humid overproduction. Furthermore, to produce an acceleration effect, it is necessary to maintain a high temperature environment during the wet process. Therefore, the temperature in the condensation process is set to any point between 40 ° C and 60 ° C.

Seven, heating system

1, the use of U-type titanium alloy high-speed heating electric heat pipe

2, temperature control and lighting completely independent system

3. The output power of temperature control is calculated by microcomputer to achieve high precision and high efficiency

4. The heating system has anti-overtemperature function:

1) The blackboard temperature is controlled by color touch screen program controller or digital key temperature controller, the output power is calculated by microcomputer, PID self-tuning, and the standard PT100 blackboard temperature sensor is used for monitoring.

2) The temperature of the sink is controlled by the color touch screen temperature controller, the sink is located at the lower part of the box, and the electric water heater is built in. During the test, there is a test section of the dark condensation process, which requires the box to produce a higher temperature of saturated water vapor, when the water vapor meets the relatively cold template surface, it will condense dew on the template surface.