According to customers' requirements for electromagnetic shielding performance testing of wireless communication devices (such as mobile phones and Internet of Things terminals) in extreme temperature environments, LIB has customized and developed a composite environmental test chamber with integrated electromagnetic shielding function. The equipment is designed with a special workroom design in conjunction with the temperature control system to test the current temperature stress loading and to evaluate the effectiveness of electromagnetic shielding.
The aluminum coating is formed on the inner wall of 304 stainless steel by arc spraying process
Shielding performance ≥35dB (30MHz-6GHz, according to IEC 61000-5-7)
Conventional models: -70℃ ~ +150℃
Temperature uniformity: ±0.5℃ (no load, measured by GB/T10586 method)
Temperature fluctuation: ±2.0℃ (24 hours continuous operation)
The electromagnetic shielding efficiency of the aluminum coating can isolate external electromagnetic interference as much as possible and create an electromagnetic environment for testing in the shielding box. In addition, the temperature test chamber is equipped with advanced refrigeration and heating system, the refrigeration end uses efficient and environmentally friendly refrigerant, with precision compressor, can quickly reduce the temperature of the working room to -70℃; Heating is completed by high-power heating wire, the heating rate can reach 5 ° C per minute, the maximum stable temperature can reach 150 ° C, and the temperature range can be customized.
The test chamber was cooled steadily to -20℃ at a rate of 3℃ per minute for 4 hours, and the stability of mobile phone signal and call quality were observed. Then it quickly heats up to 80 ° C within 1 hour, and then maintains a high temperature state for 6 hours to monitor the performance of various components of the phone, especially chips, antennas and other temperature-sensitive components. In the whole process, the temperature sensor in the test chamber and the signal monitoring equipment connected to the shielding box are linked in real time, and the data is accurately transmitted to the main control computer to generate a detailed test report.
As the leader in custom testing solutions, LIB demonstrates extraordinary customization capabilities. From the design blueprint to the delivery of the finished product, the whole process is controlled, and the most suitable test equipment is tailored for customers. If you also have non-standard test chamber needs, please contact us.
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