Application and Practice of Temperature and Humidity Testing in Industrial Product Reliability Verification

Temperature and humidity are core environmental factors affecting the performance stability and structural reliability of industrial products. LED lamps, electronic components and various industrial materials have to withstand the test of complex temperature and humidity environments throughout their life cycles. Taking the LISUN GDJS-015B High and Low Temperature Humidity Alternating Test Chamber as the core carrier, this paper explores the application of temperature and humidity testing in the long-term aging verification of LED lamps, the high and low temperature performance testing of electronic components, and the damp-heat resistance assessment of materials, analyzes the technical parameters and testing advantages of the test equipment, and provides a scientific environmental simulation test scheme for industrial product R&D verification, production quality inspection and compliance certification.

1. Industrial Value of Temperature and Humidity Testing
In industrial production and product R&D, temperature and humidity testing is a core means to simulate the dynamic changes of natural environmental temperature and humidity. By accurately reproducing various climatic scenarios such as low temperature resistance, high temperature heat resistance, humidity aging, and dry-wet alternation, it can accelerate the assessment of product performance under extreme or cyclic climatic conditions, and directly define whether the weather resistance of materials and products meets the expected application requirements. For the LED lighting, electronic and electrical appliance industries, the luminous flux maintenance rate of LED lamps, the electrical performance of electronic components, and the physical structure of industrial materials are highly sensitive to changes in temperature and humidity. Carrying out standardized temperature and humidity testing is a key link to ensure the ex-factory quality of products and enhance market competitiveness, and it is also a necessary prerequisite for products to pass domestic and foreign compliance certifications.

The LISUN GDJS-015B High and Low Temperature Humidity Alternating Test Chamber is specially developed for the environmental adaptability and reliability verification of industrial products. Relying on the core advantages of wide temperature range coverage and high-precision temperature and humidity control, it has become an important equipment for temperature and humidity testing, and can fully meet various temperature and humidity testing requirements of LED lamps, electronic components and industrial materials.

2. Specific Application of Temperature and Humidity Testing in Various Product Verifications
2.1 Long-term Aging Verification of LED Lamps
The service life and luminous flux maintenance rate are the core performance indicators of LED lamps, and the long-term effects of temperature and humidity will directly lead to the attenuation of lamp light sources and structural aging. The core of temperature and humidity testing for the verification of LED lamps is the luminous flux maintenance rate test, which must strictly comply with the IES LM-80-08 standard and provide a long-term stable temperature and humidity control environment for the test.

The LISUN GDJS-015B can simulate aging environments with different temperature and humidity combinations, and assess the performance changes of the light source, shell and circuit of LED lamps during long-term use through continuous temperature cycles and humidity alternation. The equipment is equipped with a Finnish Vaisala humidity sensor and a platinum resistance PT100Ω/MV temperature sensor, which can realize high-precision detection of temperature and humidity, ensure the stability of temperature and humidity parameters during the aging test, avoid test data distortion caused by environmental fluctuations, and provide reliable data support for the accurate calculation of the luminous flux maintenance rate of LED lamps.

2.2 High and Low Temperature Performance Testing of Electronic Components
Electronic components are the core of electronic equipment, and their electrical performance and contact stability under high and low temperature environments directly determine the operation safety of the equipment. Temperature and humidity testing for electronic components is divided into high and low temperature limit performance testing and temperature and humidity cycle testing, which needs to simulate a wide temperature range environment of -70℃~150℃ and a humidity range of 20%~98%RH, and assess the starting performance of components at low temperature, heat resistance at high temperature and anti-aging performance under temperature and humidity alternation.

The LISUN GDJS-015B has a temperature rise rate of 1.0℃~3.0℃/min and a temperature drop rate of 0.7℃~1.0℃/min, which can quickly realize precise adjustment of temperature and humidity. At the same time, the temperature and humidity uniformity in the chamber reaches ±2℃, which can ensure the environmental consistency of component testing. The equipment integrates a variety of safety protection systems, which can give real-time early warning for electric leakage, short circuit, compressor overload and other situations during the test, avoid component damage caused by sudden changes in high and low temperature, and ensure test safety.

GDJS-015B Temperature Humidity Chamber | Thermal Chamber

2.3 Damp-heat Resistance Assessment of Materials
The physical properties of industrial materials such as strength, corrosion resistance and sealing are prone to deterioration in damp-heat environments. Damp-heat resistance assessment is an important link in material R&D and application. Temperature and humidity testing simulates high humidity and high temperature, dry and wet alternating environments to assess the structural stability of materials under long-term damp-heat conditions, and is applicable to various industrial materials such as plastics, metals, rubber and seals.

The humidity deviation of the LISUN GDJS-015B is controlled at -2%~-3%RH, which can accurately simulate a high-humidity environment. At the same time, the inner liner is made of SUS304 stainless steel, which is corrosion-resistant and easy to clean, suitable for long-term damp-heat testing; the high-temperature aging silicone rubber sealing strip of the door frame can effectively prevent temperature and humidity leakage, ensure the stability of the test environment, truly reflect the performance changes of materials in the damp-heat environment, and provide a scientific basis for material selection and improvement.

3. Technical Parameters and Testing Advantages of LISUN GDJS-015B
As a professional equipment for temperature and humidity testing, the LISUN GDJS-015B has significant advantages in hardware configuration, technical parameters and control methods. Its core parameters and equipment characteristics provide hardware guarantee for temperature and humidity testing of various products. The specific core parameters are shown in Table 1.

Table 1 Core Technical Parameters of LISUN GDJS-015B High and Low Temperature Humidity Alternating Test Chamber

In terms of equipment performance, the test chamber adopts self-developed temperature control instrument + PLC dual-core control, supports Chinese and English operation, is equipped with USB/RS-232/RS-485 interfaces, can realize remote monitoring and traceability of temperature and humidity test data, and facilitate the refined management of the test process; the refrigeration system is equipped with a French TECUMSEH original compressor, the heating system uses an independent nickel-chromium alloy electric heater, and with a temperature-resistant and low-noise circulation system, it realizes rapid adjustment and uniform distribution of temperature and humidity; at the same time, it integrates multiple protections such as electric leakage, heating tube overheating, and compressor overpressure, which comprehensively guarantees the accuracy, stability and safety of temperature and humidity testing.

4. Conclusion
Temperature and humidity testing is a core means of industrial product reliability verification, and plays an irreplaceable role in the R&D and production of LED lamps, electronic components and industrial materials. The LISUN GDJS-015B High and Low Temperature Humidity Alternating Test Chamber perfectly adapts to the temperature and humidity testing needs of various products with standardized technical parameters, high-precision temperature and humidity control capabilities and diversified testing functions. It can not only meet the requirements of domestic and foreign standards such as GB/T 2423.1-2008 and IEC 60068-2-30:2005, but also provide enterprises with scientific and efficient environmental simulation test schemes.

Under the background of the high-quality development of industrial manufacturing, the standardization and precision of temperature and humidity testing will become an inevitable trend of industry development. Represented by the LISUN GDJS-015B, high and low temperature humidity alternating test chambers will continue to provide technical support for the reliability verification of products in LED lighting, electronic and electrical appliances and other industries, help enterprises improve product quality, and promote the industry to develop in the direction of standardization and high-end. In the future, temperature and humidity testing will also combine intelligent technology to realize the automation and datamation of the test process, and further improve the efficiency and accuracy of industrial product reliability verification.