Aging Test Chamber

• Lab Aging Test Chamber Working Principle

  Oct 17, 2025

  Many products (such as rubber, plastic, insulating materials, electronic components, etc.) will age due to the combined effects of heat and oxygen when exposed to the natural environment over a long period of use, such as becoming hard, brittle, cracking, and experiencing a decline in performance. This process is very slow in its natural state. The air-exchange aging test chamber greatly accelerates the aging process by creating a continuously high-temperature environment and constantly replenishing fresh air in the laboratory, thereby evaluating the long-term heat aging resistance of materials in a short period of time.   The working principle of Lab aging test chamber mainly relies on the collaborative efforts of three systems: 1. The heating system provides and maintains a high-temperature environment inside the test chamber. High-performance electric heaters are usually adopted and installed at the bottom, back or in the air duct of the test chamber. After the controller sets the target temperature (for example, 150°C), the heater starts to work. The air is blown through the heater by a high-power fan. The heated air is forced to circulate inside the box, causing the temperature inside the box to rise evenly and remain at the set value. 2. The ventilation system is the key that distinguishes it from ordinary ovens. At high temperatures, the sample will undergo an oxidation reaction with oxygen in the air, consuming oxygen and generating volatile products. If the air is not exchanged, the oxygen concentration inside the box will decrease, the reaction will slow down, and it may even be surrounded by the products of the sample's own decomposition. This is inconsistent with the actual usage of the product in a naturally ventilated environment. 3. The control system precisely controls the parameters of the entire testing process. The PID (Proportional-integral-Derivative) intelligent control mode is adopted. The real-time temperature is fed back through the temperature sensor inside the box (such as platinum resistance PT100). The controller precisely adjusts the output power of the heater to ensure that the temperature fluctuation is extremely small and remains stable at the set value. Set the air exchange volume within a unit of time (for example, 50 air changes per hour). This is one of the core parameters of the air-exchange aging test chamber, which usually follows relevant test standards (such as GB/T, ASTM, IEC, etc.).   The test chamber creates a high-temperature environment through electric heaters, achieves uniform temperature inside the box by using centrifugal fans, and continuously expels exhaust gases and draws in fresh air through a unique ventilation system. Thus, under controllable experimental conditions, it simulates and accelerates the aging process of materials in a naturally ventilated thermal and oxygen environment. The biggest difference between it and a common oven lies in its "ventilation" function, which enables its test results to more truly reflect the heat aging resistance of the material during long-term use.

  hot Tags : Aging Test Chamber Temperature Test Chamber Drying Test Chamber Precision Oven Weathering Test Chamber Aging Test Equipment

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• Summary for LED Testing Conditions

  Apr 22, 2025

  What is LED? A Light Emitting Diode (LED) is a special type of diode that emits monochromatic, discontinuous light when a forward voltage is applied—a phenomenon known as electroluminescence. By altering the chemical composition of the semiconductor material, LEDs can produce near-ultraviolet, visible, or infrared light. Initially, LEDs were primarily used as indicator lights and display panels. However, with the advent of white LEDs, they are now also employed in lighting applications. Recognized as the new light source of the 21st century, LEDs offer unparalleled advantages such as high efficiency, long lifespan, and durability compared to traditional light sources. Classification by Brightness: Standard Brightness LEDs (made from materials like GaP, GaAsP) High-Brightness LEDs (made from AlGaAs) Ultra-High-Brightness LEDs (made from other advanced materials) ☆ Infrared Diodes (IREDs): Emit invisible infrared light and serve different applications.   LED Reliability Testing Overview: LEDs were first developed in the 1960s and were initially used in traffic signals and consumer products. It is only in recent years that they have been adopted for lighting and as alternative light sources. Additional Notes on LED Lifespan: The lower the LED junction temperature, the longer its lifespan, and vice versa. LED lifespan under high temperatures: 10,000 hours at 74°C 25,000 hours at 63°C As an industrial product, LED light sources are required to have a lifespan of 35,000 hours (guaranteed usage time). Traditional light bulbs typically have a lifespan of around 1,000 hours. LED streetlights are expected to last over 50,000 hours.                         LED Testing Conditions Summary: Temperature Shock Test Shock Temp. 1 Room Temp Shock Temp. 2 Recovery Time Cycles Shock Method Remarks -20℃(5 min) 2 90℃(5 min)   2 Gas Shock   -30℃(5 min) 5 105℃(5 min)   10 Gas Shock   -30℃(30 min)   105℃(30 min)   10 Gas Shock   88℃(20 min)   -44℃(20 min)   10 Gas Shock   100℃(30 min)   -40℃(30 min)   30 Gas Shock   100℃(15 min)   -40℃(15 min) 5 300 Gas Shock HB-LEDs 100℃(5 min)   -10℃(5 min)   300 Liquid Shock HB-LEDs   LED High-Temperature High-Humidity Test (THB Test) Temperature/Humidity Time Remarks 40℃/95%R.H. 96 Hour   60℃/85%R.H. 500 Hour LED Lifespan Testing 60℃/90%R.H. 1000 Hour LED Lifespan Testing 60℃/95%R.H. 500 Hour LED Lifespan Testing 85℃/85%R.H. 50 Hour   85℃/85%R.H. 1000 Hour LED Lifespan Testing   Room Temperature Lifespan Test 27℃ 1000 Hour Continuous illumination at constant current   High-Temperature Operating Life Test (HTOL Test) 85℃ 1000 Hour Continuous illumination at constant current 100℃ 1000 Hour Continuous illumination at constant current   Low-Temperature Operating Life Test (LTOL Test) -40℃ 1000 Hour Continuous illumination at constant current -45℃ 1000 Hour Continuous illumination at constant current   Solderability Test Test Condition Remarks The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 260 °C for 5 seconds.   The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 260+5 °C for 6 seconds.   The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 300 °C for 3 seconds.     Reflow soldering oven test 240℃ 10 seconds   Environmental test (Conduct TTW solder treatment for 10 seconds at a temperature of 240 °C ± 5 °C) Test Name Reference Standard Refer to the content of the test conditions in JIS C 7021 Recovery Cycle Number (H) Temperature Cycling Automotive Specification -40 °C ←→ 100 °C, with a dwell time of 15 minutes  5 minutes 5/50/100 Temperature Cycling   60 °C/95% R.H, with current applied   50/100 Humidity Reverse Bias MIL-STD-883 Method 60 °C/95% R.H, 5V RB   50/100  

  hot Tags : Thermal Shock Chamber Climate Test Chamber Temperature and Humidity test for LED Rapid Thermal Cycling Chamber Simulation Chamber Aging Test Chamber

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