As a high-end environmental test chamber, the low-pressure test chamber is a specialized equipment that only a few manufacturers in Beijing and Chongqing are capable of producing. Yashilin Instruments stands out as a leading brand in the field of environmental testing. Known for its advanced vacuum pipeline technology, the company has continuously improved its systems to meet the demanding requirements of both domestic and international customers across various altitudes and conditions. This low-pressure test chamber is widely used in critical industries such as aviation, aerospace, information technology, and electronics. It is designed to evaluate the environmental adaptability and reliability of instruments, electrical products, materials, and components under low-pressure conditions, either alone or in combination with high and low-temperature environments. Additionally, it can simultaneously measure the electrical performance parameters of the test samples, ensuring comprehensive and accurate evaluations. The test chamber features a monolithic composite structure, with the insulated box (pressure-bearing structure) located at the front, while the refrigeration unit, vacuum system, and electrical control system are strategically placed at the rear and on the door. This design ensures stability, efficiency, and ease of operation. Key technical specifications include: - **Temperature Range**: A: -20°C ~ 150°C; B: -40°C ~ 150°C; C: -60°C ~ 150°C; D: -70°C ~ 150°C - **Pressure Range**: From atmospheric pressure down to 0.5 kPa - **Pressure Deviation**: ±1.8 kPa (normal pressure ~ 40 kPa); ±4.5% (40 kPa ~ 4 kPa); ±0.1 kPa (4 kPa ~ 0.5 kPa) - **Evacuation Time**: ≤45 minutes (from normal pressure to 0.5 kPa) - **Temperature Fluctuation**: ±0.5°C (normal pressure, no load) - **Temperature Uniformity**: ≤±2°C (normal pressure, no load) - **Temperature Deviation**: ≤±3°C (normal pressure, no load) - **Heating Rate**: 1.0~3.0°C/min - **Cooling Rate**: 0.7~1.0°C/min The control system is equipped with a Siemens PLC controller and a color LCD touch screen, offering precise and user-friendly operation. The temperature setting accuracy is ±0.1°C, with an indicating accuracy of ±0.1°C and a resolution of ±0.1°C. Temperature sensors use platinum resistance PT100Ω/MV, while pressure sensors are based on electronic pressure transmitters. The heating system is fully independent, using nickel-chromium alloy electric heaters for reliable and efficient performance. The refrigeration system employs original French "Taikang" fully enclosed air-cooled single-stage or multi-stage compressors. The circulation system includes a low-noise, temperature-resistant motor with a multi-leaf centrifugal fan wheel, ensuring even temperature distribution. The outer casing is made of carbon steel plate with phosphating and electrostatic spray treatment, while the inner chamber is constructed from high-quality SUS304 stainless steel with a mirror finish. Insulation materials include polyurethane rigid foam and superfine glass fiber cotton for excellent thermal performance. The door frame is insulated with double-layer high and low-temperature resistant silicone rubber seals, providing effective sealing and durability. Safety features include protection against leakage, short circuits, over-temperature, motor overheating, compressor overpressure, overload, and overcurrent. The chamber also offers a timing function with adjustable settings from 0.1 to 999.9 hours, minutes, or seconds, making it suitable for a wide range of testing applications. [Image: http://i.bosscdn.com/blog/20/14/06/201313581387.jpg]

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