The myopia rate of primary and secondary school students remains high. More and more people are advocating to pay attention to the improvement of students’ eyesight and the healthy lighting of classrooms, especially parents of students and classrooms. The education industry has also issued relevant standards, such as classroom lighting and lighting hygiene standards in primary and secondary ...
The concept of electromagnetic compatibility IEC 60050 (161) is equivalent to GB/T4365-1995 “Electromagnetic Compatibility Terminology”, which defines EMC as “equipment or system can work normally in its electromagnetic environment and does not constitute unacceptable electromagnetic the ability to harass.” Electromagnetic compatibility is the research that under the condit...
Foreword: With the rapid development of the LED industry, the application range of LED lamps is becoming wider and wider, and there are more and more types of lamps. Flat light is one of them. Flat light is suitable for indoor lighting such as living room, bedroom, corridor, kitchen, viewing balcony, etc. At the same wattage as traditional lighting sources, flat panel lights are energy efficient, ...
A key design challenge in designing a power bank is passing EMI testing. Electronics engineers often worry about failing EMI tests. If the circuit EMI test fails many times, it will be a nightmare. You will have to work around the clock in the EMI lab to fix problems and avoid delays in product rollouts. For consumer products such as power banks, the design cycle is short and the EMI certification...
On 9th ,October, 2018, the Illuminating Engineering Society of North America (IES) released a new version of the light source color quality evaluation standard – IES TM-30-18 Method for Evaluating Light Source Color Rendition (evaluation of light source color reproduction method), with a partial update to the legacy documentation. Compared with the old version of the document released in 201...
At present, the withstand voltage tester seen on the market adopts the GB4706 (equivalent to IEC1010) standard, and the AC/DC withstand voltage and insulation resistance three-in-one withstand voltage tester with desktop structure is mostly used, which can basically meet the needs of users for testing. And most of the withstand voltage testers on the market currently use the microprocessor-control...
Uncontrolled environmental conditions, such as temperature and humidity, may be achieved in an Environmental Chamber, which is an enclosed chamber. By delivering salt spray within the chamber, certain chambers may also imitate rusting. Temperature chambers enable manufacturers to check test their goods in a controlled environment before shipping them. This chamber’s size might vary substanti...
Hazards in industry: The generation of static electricity is inevitable in industrial production, and the hazards caused by it can be attributed to the following two mechanisms: 1. Hazards caused by electrostatic discharge (ESD): cause malfunction or malfunction of electronic equipment and cause electromagnetic interference. 2. Breakdown of integrated circuits and precision electronic components, ...
Fundamentals and Harmonics In complex periodic oscillations, both fundamental and harmonics are involved. The sine wave component equal to the longest period of the oscillation is called the fundamental wave. The frequency corresponding to this period is called the fundamental frequency. The components of a sine wave whose frequency is an integer multiple of the fundamental frequency are called ha...
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