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Abstract This paper delves into the crucial role of withstand voltage insulation testers in ensuring electrical safety. With a specific focus on the LISUN LS9923 Programmable Withstanding Voltage & Insulation Test instrument, it explores the principles behind its operation, its technical specifications, and diverse applications across various industries. By analyzing its features, comparing it with traditional testers, and examining real – world usage scenarios, the importance of this type of tester in maintaining product quality and preventing electrical hazards is emphasized. 1. Introduction In the realm of electrical and electronic products, ensuring safety is of paramount importance. One of the key aspects of electrical safety testing is the use of withstand voltage insulation testers. These testers play a vital role in determining whether electrical products can withstand high – voltage stress without insulation breakdown, which could lead to electric shock, fire, or equipment...
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Introduction As electronic devices become increasingly complex and ubiquitous, electromagnetic compatibility (EMC) and electromagnetic interference (EMI) have emerged as critical factors in the design, manufacturing, and operation of modern electronics. Whether in consumer electronics, industrial control systems, or aerospace applications, EMC/EMI issues can disrupt system performance, compromise safety, and lead to costly compliance failures. LISUN, based in Shanghai, China, has established itself as a leading provider of high-precision EMC and EMI testing instruments. With over two decades of experience in lighting and electromagnetic measurement technologies, LISUN offers a comprehensive range of test equipment designed to ensure that products meet international standards such as IEC 61000 series, CISPR, FCC Part 15, and ISO 11452. This article provides a detailed technical overview of EMC and EMI principles, their sources, and measurement methodologies, with a particular focus on L...
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Abstract This paper focuses on the application of Common Mode Inductor Balance Tester in the balance measurement of inductance (Ls) and direct current resistance (DCR) for common mode inductors and filter common mode inductors. Taking the LISUN LS8517CX Common Mode Inductor Balance Tester as a core case, the article elaborates on the technical principles, measurement accuracy, functional characteristics, and model differences of this testing equipment. It also provides detailed comparative data through tables to illustrate the performance advantages of different models in various testing scenarios, aiming to offer a comprehensive reference for production line quality control, incoming material inspection, and component design and evaluation in the electronics industry. 1. Introduction Common mode inductors and filter common mode inductors are critical components in electronic circuits, playing a vital role in suppressing electromagnetic interference (EMI) and ensuring signal integrity....
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In the realm of electrical and electronic engineering, ensuring the quality and reliability of electrical components is of paramount importance. Among the various testing instruments, the impulse winding tester stands out as a crucial device for evaluating the integrity of coils, which are fundamental components in numerous electrical systems. This article aims to comprehensively answer the question “What is impulse winding tester?” by delving into its working principles, applications, and by taking a detailed look at the LISUN LS8815 Impulse Winding Tester, a state-of-the-art product in this field.​ 1. Understanding the Basics of Impulse Winding Tester​ An impulse winding tester is a specialized instrument used to detect defects in the insulation of electrical coils. Electrical coils, such as those found in motors, transformers, solenoids, and inductors, rely on the integrity of their insulation to function properly and safely. Any flaws in the insulation can lead to short circuits, o...
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Introduction In modern industrial production and scientific research, high-low temperature and humidity alternating test chambers are critical environmental testing devices widely used in industries such as electronics, telecommunications, automotive, aerospace, and materials science. These chambers simulate extreme conditions, including high temperatures, low temperatures, high humidity, and low humidity, to evaluate product performance and reliability under diverse environmental conditions. Shanghai LISUN, a renowned domestic manufacturer of environmental testing equipment, is celebrated for the advanced technology and stable performance of its high-low temperature and humidity alternating test chambers, such as the GDJS-015B model. However, during operation, particularly in high-humidity test modes, these chambers may influence the chamber humidity, which in turn affects the indoor humidity of the laboratory or testing environment. This article focuses on chamber humidity as the cor...
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Introduction In the rapidly advancing field of LED lighting, the LED Tester has become an essential tool for ensuring that light sources meet rigorous international standards for performance and efficiency. LEDs, renowned for their high efficiency, energy savings, and environmental benefits, are widely utilized in applications ranging from indoor and outdoor lighting to display technologies, agricultural lighting, and specialized illumination systems. Accurate measurement of photometric, colorimetric, and electrical parameters is critical to ensuring LED quality, reliability, and market competitiveness. The LSG-6000 Rotating Detector Vertical Goniophotometer (Full-Space Goniophotometer), developed by Shanghai LISUN LED Test Equipment Co., Ltd. (hereinafter referred to as LISUN), is a cutting-edge LED Tester designed to measure light intensity distribution and luminous flux with unparalleled precision, fully compliant with LM-79-19 standards. This article explores the technical principl...
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Introduction Luminous flux is a fundamental photometric quantity that measures the total amount of visible light emitted by a light source over time. It serves as a cornerstone in the fields of lighting engineering, optical design, and photometry research. As the demand for energy-efficient lighting solutions continues to rise, accurate measurement of luminous flux has become increasingly critical. Shanghai LISUN Instruments, a leading manufacturer of LED testing equipment, offers advanced tools and systems designed to provide precise and reliable luminous flux measurements. This article provides an in-depth technical overview of Shanghai LISUN’s LED test equipment for luminous flux testing, exploring its methodologies, applications, and future development trends. LPCE-2(LMS-9000)High Precision Spectroradiometer Integrated Sphere System Understanding Luminous Flux Luminous flux (Φv) is defined as the total perceived power of visible light emitted by a light source per unit time, measur...
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