Square Type Accelerated Weathering Chamber ASTMG53-77 UV Light Test
Best Price Square Type UV Accelerated Weathering Chamber ASTMG53-77
UV Light Test
Equipment Overview
This testing chamber simulates damage caused by sunlight, rain, and
dew exposure. It utilizes fluorescent ultraviolet UV lamps to
replicate sunlight effects and condensed moisture to simulate rain
and dew. Test materials are exposed to alternating cycles of light
and moisture at controlled temperatures. The UV chamber can
reproduce outdoor weathering hazards that typically occur over
months or years within just days or weeks. Test data helps in
material selection and evaluating how formulation changes impact
product durability.
Standard Test Conditions
| Parameter | Specification |
|---|
| Sample Mounting | Test samples are fixed on the test rack facing fluorescent lamps.
Empty positions are filled with blackboards to maintain chamber
closure. |
| Test Temperatures | Illumination: 50°C, 60°C, or 70°C (60°C preferred); Condensation:
50°C; Temperature uniformity: ±2°C |
| Cycle Options | 4 hours illumination / 4 hours condensation or 8 hours illumination
/ 4 hours condensation |
| Lamp Replacement | Replace fluorescent lamps after 400-450 hours of operation.
Remaining lamps compensate for aging effects, ensuring 1600-1800
hours total service life. |
| Maintenance | When replacing lamps, clean and dry the water pan to prevent scale
formation. |
Key System Components
1. UV Fluorescent Lamps
UV lamps are fragile and packaged separately. Installation requires
careful handling:
- Power off equipment before lifting chamber cover and accessing lamp
replacement ports
- Insert UV fluorescent lamp into right seal, then push into opposite
side seal
- Adjust both ends of lamp sealing caps and connect to power supply
- Maintain lamp surface cleanliness using alcohol wipes to prevent
irradiance contamination
- Store spare lamps in ventilated, dry, non-corrosive environments
2. Temperature Control System
Consists of black standard thermometer, heater, fan, intelligent
program regulator, and other actuators. Uses BTHC temperature
control mode to blow hot air into the test chamber, maintaining
stable test temperatures.
3. Humidity Supply System
Comprises water tank and humidification system. Through moisture
condensation mechanisms, creates condensation on specimen surfaces,
simulating rain, high humidity, and dew conditions combined with UV
exposure for optimal testing environment.
4. Specimen Carrying Device
Located on the uniform UV lamp radiation surface, constructed from
perforated stainless steel plate for consistent exposure.
5. Protection System
Comprehensive safety protections including water shortage, anti-dry
burning, over-temperature, short circuit, and overload protection.
Located in electric control panel and cabinet. Automatically cuts
power and provides audible alarm during fault conditions to ensure
equipment and personnel safety.
