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Introduction In modern indoor horticulture, the application of LED plant grow lights has become a trend. These fixtures significantly boost the efficiency and yield of indoor cultivation by providing suitable spectra for plant growth. However, when selecting appropriate LED grow lights, cultivators must understand two key parameters: Photosynthetic Photon Flux (PPF) and Photosynthetic Photon Flux Density (PPFD). This article delves into the definition, measurement methods, and importance of PPFD in plant growth, with a focus on Shanghai LiShan’s technical applications in PPFD measurement processes. What is PPFD? Photosynthetic Photon Flux Density (PPFD) refers to the number of photons received per unit area, typically measured in micromoles per square meter per second (μmol/m²/s). Unlike PPF, which measures the total photon output from a light source, PPFD takes into account the distribution of light across the plant canopy. Understanding “what is PPFD” is crucial because it directly i...
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Introduction In modern technology and industry, the precise measurement of light intensity plays a pivotal role. Whether in lighting engineering, optical equipment manufacturing, or scientific research, the phrase “intensity of light is measured in” serves as a fundamental yet crucial concept. Understanding the units used to measure light intensity and their applications not only enhances product quality but also drives technological innovation. This article delves into the primary units of light intensity measurement and highlights how the Lisun Goniophotometer excels in testing light intensity with precision. LM-79 Moving Detector Goniophotometer (Mirror Type C) Basic Units for Measuring Light Intensity • Candela (cd) The candela is one of the seven base units in the International System of Units (SI) and is used to describe the luminous intensity of a light source in a specific direction. It is defined as the luminous intensity, in a given direction, of a source that emits monochrom...
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Introduction In the design of modern electronic products, Ingress Protection (IP) ratings are crucial standards for assessing a device’s ability to withstand environmental factors such as dust and water ingress. Among these, IPX7 waterproofing has garnered significant attention because it signifies that devices can endure immersion in 1 meter of water for up to 30 minutes without sustaining damage. This article will delve into the concept of IPX7 waterproofing, testing methodologies, their limitations, and introduce how Shanghai LISUN’s JL-X waterproof testing system effectively conducts waterproof rating tests. Understanding IPX7 Waterproof Rating The IP (Ingress Protection) code consists of two digits, representing protection against solid objects including dust and liquids. When an “X” appears, it indicates no information is available regarding that specific type of protection. Therefore, in IPX7, the “X” means there is no specified dust protection, while the “7” confirms compliance...
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Abstract In modern electronic design and compliance testing, immunity to electrical fast transients (EFT) is a critical performance indicator. The eft test generator serves as a standard tool to simulate such disturbances, ensuring electronic equipment can withstand operational disruptions. This paper discusses the technical principles, structural design, and test methods of the eft test generator, with a focus on the LISUN EFT61000-4 EFT Immunity Measurement product. The study elaborates on how the generator fulfills IEC61000-4-4 standard requirements, providing stable and repeatable test environments. Experimental configurations, waveform specifications, and output characteristics are presented alongside practical application scenarios in electronic testing environments. Introduction The rise of digital control systems and power electronics in today’s industry has made electromagnetic compatibility (EMC) compliance more essential than ever. Among various EMC tests, immunity to electr...
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Introduction In modern industry and scientific research, environmental simulation equipment plays a crucial role. These devices can precisely control key parameters such as temperature and humidity, providing a solid foundation for product development, testing, and quality assurance. The “LISUN Temperature and Humidity Test Chamber” stands out in the industry with its superior performance and technological advantages, becoming a trusted choice for many enterprises. This article will delve into various aspects of the LISUN Temperature and Humidity Test Chamber from technical principles, application scenarios, to real-world case studies. Technical Principles of Temperature and Humidity Test Chambers •Temperature Control：One of the core functions of a temperature and humidity test chamber is precise temperature control. This primarily relies on advanced heating and cooling systems. The LISUN Temperature and Humidity Test Chamber employs efficient PID (Proportional-Integral-Derivative) con...
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Introduction Corrosion testing plays a crucial role in quality assurance laboratories within the metal industry, especially when it comes to quality control testing. The LISUN YWX/Q-010 Salt Spray Tester Machine is one of the primary devices used to conduct these tests, particularly in the evaluation of ferrous metals and their alloys. In addition to its use in the metal industry, this testing method has also gained widespread adoption in the paint and coatings sector. Its purpose is to ensure the quality of coatings, thereby providing long-lasting protection and performance for ferrous metals. Understanding Corrosion and Its Impact on Metals Corrosion, although often overlooked, can have profound and severe impacts on ferrous metals. Our environment contains various corrosive agents, notably salt, which can react with iron to cause unexpected chemical reactions leading to oxidation. This process converts ferrous ions into ferrous oxide, ultimately resulting in the degradation of the p...
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Introduction With the rapid development of electronic technology and manufacturing, the impact of static electricity on production processes has become increasingly significant. Especially in industries requiring high precision such as semiconductor manufacturing and electronic product assembly, static electricity not only affects product quality but can also lead to equipment damage and safety incidents. The LISUN Electrostatic Discharge ESD , as a specialized testing tool, plays an important role in improving product yield and ensuring production safety. Static electricity is a common phenomenon that occurs when two materials come into contact and then separate. This process causes electrons to transfer from one material to another, resulting in charge accumulation. In industrial settings, this charge can build up on machinery, components, or even people, leading to various issues. The LISUN electrostatic discharge esd provides a controlled environment for simulating these conditions...
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