1、 Spectral range matching: covering the core bands of application scenarios
The spectral range of the solar radiation test chamber needs to be highly compatible with the actual light environment of the test material.
General standard: Priority should be given to selecting 280-3000nm full spectrum equipment, covering ultraviolet (UV), visible light, and infrared (IR), to meet the general testing needs of industries such as photovoltaics, automobiles, and coatings. For example, photovoltaic modules need to simulate the AM1.5 spectral standard, and the equipment needs to support a distribution where visible light (400-800nm) accounts for over 50% and infrared light (800-2450nm) accounts for about 37%.
Special requirement: If the test material is sensitive to a specific wavelength band (such as the aging effect of UV-B on plastics), it is necessary to choose equipment that supports wavelength band customization and adjust the spectral ratio through a filter. For example, car interior testing requires strengthening the 300-400nm UV-A band to simulate the lighting environment inside the car.
2、 Radiation intensity control: accuracy and stability as core indicators
The irradiation intensity directly affects the repeatability and reliability of the test results, and the following parameters need to be considered:
Adjustment range: Conventional equipment supports adjustable range of 50-1120W/m ², meeting the requirements of GJB150.7A and other standards. If testing in high-temperature environments (such as desert scenes), it is necessary to select equipment that supports irradiance of 1200W/m ² or higher.
Uniformity: The irradiation uniformity should be ≤± 10% to ensure that all points on the sample surface receive consistent light. For example, the car sunlight radiation intensity test chamber is designed with a long arc xenon lamp and a long groove parabolic reflector to optimize the uniformity to ± 8%.
Stability: Adopting a closed-loop feedback regulation system (such as a "solar eye" light control probe) to monitor and compensate for light decay caused by lamp aging in real time. High quality equipment can still control irradiance fluctuations within ± 1% after continuous operation for 1000 hours.
3、 Sample Capacity Matching: Coordinated Consideration of Space Size and Load Capacity
The sample capacity needs to balance the testing batch and size limitations to avoid edge effects caused by insufficient space
Basic equipment: The inner box size shall not be less than 1700 × 1400 × 1700mm (length × width × height), and can accommodate standard test boards (such as 150 × 70mm) and small and medium-sized components (such as car instrument panels).
Large walk-in test chamber: with a nominal content area of 30m ³ and an inner box size of 3000 × 4000 × 2500mm, it supports testing of entire vehicles or large equipment (such as solar panel arrays), with a load capacity of 700kg/m ² (uniform load).
Scalability: Prioritize equipment that supports independent control of multiple workstations, allowing for simultaneous testing of different materials or working conditions to improve efficiency. For example, a certain model of equipment is equipped with six 1800W xenon arc lamps, each of which can adjust the irradiation intensity separately to meet the requirements of multi parameter comparative testing.