Integrating Sphere | Goniophotometer | Surge Generator | ESD Simulator - LISUN

1. Introduction In the realm of electronics, the accurate measurement of electrical components’ properties is crucial for product development, quality control, and research purposes. LCR meters and impedance analyzers play a pivotal role in this regard. These instruments are designed to measure the impedance characteristics of various components, such as inductors (L), capacitors (C), and resistors (R), providing essential data for engineers and technicians. This article delves deep into the functionality, applications, and features of LCR meters and impedance analyzers, with a specific focus on the LISUN LS90 Impedance Analyzer. 2. Understanding LCR Meters and Impedance Analyzers 2.1 Basic Principles LCR meters are specialized devices that measure the values of inductance (L), capacitance (C), and resistance (R) of electrical components. They operate based on different measurement techniques, such as the bridge method, the resonant method, and the impedance – voltage – current (IV) me...

Introduction Electrostatic Discharge (ESD) is a phenomenon that occurs when two objects with different electrostatic potentials come into contact, causing a rapid transfer of electric charge. This seemingly simple physical event can have profound consequences in the electronics industry, particularly in the manufacturing, testing, and operational environments of sensitive electronic components. In today’s world of increasingly miniaturized and integrated circuits, even a small static discharge—often imperceptible to humans—can lead to irreversible damage or performance degradation of semiconductor devices. As a result, ESD protection has become an essential aspect of product design, quality assurance, and reliability engineering, especially for industries such as consumer electronics, automotive systems, aerospace, medical devices, and industrial automation. To address these critical challenges, LISUN has emerged as a leading global provider of high-performance ESD testing equipment. W...

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...

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...

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....

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...

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...