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With the widespread use of electronic devices, electromagnetic interference (EMI) issues have become increasingly prominent. As a result, electromagnetic compatibility (EMC) testing has gained significant attention from companies. EMC testing is a complex process involving control techniques such as shielding, filtering, and grounding, as well as balancing and low-level techniques. Before addressing EMC issues, it is crucial to measure the electromagnetic characteristics of samples using testing equipment or systems to determine the appropriate improvement strategies. Challenges in RF Electromagnetic Field Radiation Immunity Testing: RF electromagnetic field radiation immunity is a critical component of EMC testing but presents several challenges for companies due to high costs associated with the required facilities and equipment. This testing requires an anechoic chamber and RF amplifier equipment. The construction of an anechoic chamber demands substantial space and structural suppo

In recent years, the automotive industry in China has developed rapidly. However, progress in automotive electromagnetic compatibility (EMC) testing standards and regulations has lagged. Nevertheless, recent updates and new standards demonstrate that China is quickly advancing in standard development to keep pace with the automotive industry’s growth. Importance of Automotive EMC With technological advancement and the rapid growth of the automotive industry, the number of in-vehicle electronic devices has increased. Consequently, EMC design standards and regulations have become crucial. Modern vehicles are equipped with various electronic devices, such as multimedia entertainment systems, Bluetooth communication, satellite navigation, braking systems, and airbags. These systems may emit interference signals or malfunction due to high sensitivity when exposed to strong interference zones. Such malfunctions can range from minor inconveniences to severe accidents, posing a threat to life

The UL94 horizontal and vertical burning tester is a precision device used to evaluate the combustion performance of materials. It is applicable in research, production, and quality inspection across a wide range of electrical and electronic products and components, including lighting equipment, low-voltage electrical appliances, household appliances, machine tool electrical devices, motors, power tools, electronic instruments, electrical instruments, IT equipment, office electrical equipment, electrical connectors, and accessories. This equipment is also suitable for industries involving insulation materials, engineering plastics, or other solid combustible materials. Main Testing Methods The UL94 horizontal and vertical burning tester supports five primary testing methods: Horizontal Burning Test (HB): The material is placed horizontally, and after burning for a specific duration, the burn rate and flame extinguishing time are measured. It is used to assess the flammability of materi

A spectrophotometer is a common tool for color measurement, widely used in color evaluation, color control, color matching, and material composition analysis. This precise instrument operates by using a spectrophotometer to graphically display spectral ratios and emission curves, calculating measurement values using fixed formulas. The spectrophotometer automatically records all measured data and calculates the final results. A spectrophotometer mainly consists of four parts: • Light Source: Provides the necessary light for measurement. • Integrating Sphere: Distributes the light uniformly to ensure accurate measurement. • Grating (Monochromator): Separates the light into different wavelengths. • Photodetector: Detects and records the intensity of the dispersed light. Different brands and models of spectrophotometers may vary in measurement principles, primarily categorized into single-beam and double-beam measurement principles. Single-Beam Measurement Principle Single-beam spectropho

The LED driver power supply is a crucial component of LED lighting systems, directly influencing the lighting effect and lifespan of LED fixtures. Thus, comprehensive and accurate testing of LED driver power supplies is essential. The LED driver power supply testing system has emerged as a specialized testing device, providing robust support for quality control and performance evaluation of LED power supplies. Key Functions Electrical Performance Parameter Testing The system precisely measures critical parameters such as input/output voltage, current, and power, evaluating the load characteristics and efficiency of LED driver power supplies. Startup Characteristics and Protection Function Testing It detects startup time, surge voltage, over-voltage protection, and other characteristics to ensure compliance with relevant standards and customer requirements. Automated Testing and Data Analysis Controlled by computer programs, the system automates the testing process, comparing test data

In fields such as color management, quality control, and product development, color accuracy is crucial for ensuring product quality and meeting customer expectations. Spectrophotometers, as highly accurate and efficient color measurement tools, play an indispensable role in these areas. Working Principle of Spectrophotometers Spectrophotometers operate based on spectral and photoelectric conversion technologies. Initially, they emit white light through a light source, which is then separated into monochromatic light of different wavelengths using a grating or prism in the spectrophotometer. This monochromatic light is then directed onto the sample under test. The sample absorbs, reflects, or transmits parts of the light depending on its physical and chemical properties. Finally, a photodetector within the instrument receives this light and converts it into electrical signals. Through signal processing and analysis, the spectrophotometer derives accurate color information from the samp

A power parameter tester, also known as an electrical parameter measurement device, is primarily used for measuring various electrical parameters of instruments and equipment, including voltage, current, power, and power factor. It encompasses different types such as digital power parameter testers, single-phase power parameter testers, and three-phase power parameter testers. Among these, digital power parameter testers, characterized by compact size and stable quality through surface-mount technology, feature rich interface and measurement capabilities. They can comprehensively measure parameters such as harmonics, PWM waveforms, and no-load losses, meeting the requirements for laboratory testing of power frequency products. Types and Applications Digital Power Parameter Testers: • Single-phase: Widely used for measuring devices like televisions and transformers. • Three-phase: Suitable for parameter measurement in three-phase instruments such as motors. • AC, DC, and AC/DC Power Par

Transformers are indispensable components in modern electrical systems, facilitating voltage regulation and efficient energy distribution across various applications. To ensure the reliability and operational integrity of transformers, comprehensive testing is essential. The transformer comprehensive tester serves as a critical device designed specifically for accurate capacity testing of transformers, ensuring their stability and reliability during operation. I. Introduction Transformers play a crucial role in electrical infrastructure by stepping up or stepping down voltage levels to enable efficient electricity transmission and distribution. The transformer comprehensive tester is instrumental in meticulously measuring various transformer parameters, guaranteeing their optimal performance and reliability throughout their operational lifespan. II. Functions and Applications Capacity Testing: The primary function of the transformer comprehensive tester is to conduct precise capacity t

Batteries are indispensable energy sources widely used in various electronic devices and transportation. However, ensuring the safety and stability of batteries remains a focal point for both the public and professionals. To guarantee high safety and reliability throughout their usage, the battery internal resistance tester has emerged as a crucial tool, safeguarding battery performance. The battery internal resistance tester evaluates the health of batteries by measuring their internal resistance. Elevated internal resistance may indicate aging or potential failure risks, making timely detection essential for preventing hazards. With its high precision and convenience, the battery internal resistance tester is extensively applied in electric vehicles, smartphones, laptops, and more, playing a pivotal role in battery safety management. The battery internal resistance tester effectively measures the voltage and internal resistance at both terminals of rechargeable batteries, assessing t

Principles of Capacitor Measurement Capacitors are essential components in electronic circuits, commonly used to store electric charge. The measurement of a capacitor’s value is based on the physical concept of capacitance, which is the ability of a system of two conductors separated by an insulator (dielectric) to store charge. The capacitance value is influenced by factors such as the distance between conductors, the reference area, and the dielectric constant. Common methods for measuring capacitance include: • Frequency Conversion Method: This method uses an oscillating circuit to convert the capacitance value to a frequency, which is then measured using a frequency counter. • PWM Circuit Method: This method uses a pulse width modulation circuit to convert the capacitance value to an analog voltage, which is then measured with a voltmeter. • Bridge Method: This method uses the principles of a bridge circuit to accurately measure capacitance values. Types and Applications of Capacit

Dual Nature of Electrical Power Electricity is an indispensable resource in modern society, playing a crucial role in our daily lives and industrial activities. However, electricity also poses potential dangers. Electrical leakage and current leakage can threaten personal safety and even cause fatal accidents. Therefore, ensuring electrical safety is a critical issue that must be addressed. What is Leakage Current? Leakage current is the current that flows between electrically insulated metal parts or between live parts and grounded parts through the surrounding medium or along the surface of insulation under specific voltage conditions. According to the American UL standard, leakage current includes capacitive coupling current and is the current that can be conducted from accessible parts of household appliances.  Leakage current can be divided into two parts: • Insulation Resistance Conductive Current (I1): The current conducted through insulation resistance. • Distributed Capacitanc

Introduction to Impulse Coils Tester Impulse coil testers, also known as digital interturn insulation testers, are devices used for non-destructive electrical testing of coil-wound components. The operating principle involves applying the same pulse voltage to both a standard coil winding and the coil under test, then comparing their transient waveforms to evaluate the quality of the tested coil. Transient waveforms, or damped oscillation waveforms occurring within the coil, can be used to assess the inductance, quality factor, number of turns, and interturn short circuits of the winding. Additionally, in the presence of a core, the material differences can also be determined. The occurrence of corona discharge under high voltage pulses can be used to evaluate insulation deficiencies. LISUN LS8815 Series Impulse Coils Tester The LS8815 series impulse coil testers employ advanced, high-stability high-voltage impulse power sources, significantly improving testing accuracy. The instrument

XRF (X-ray Fluorescence) analyzers are commonly used analytical devices capable of quickly and non-destructively determining the composition of various materials. XRF analyzers excite the elements in a sample using X-rays, causing inner-shell electrons to transition to higher energy levels and emit secondary X-rays (X-ray fluorescence). These fluorescent X-rays are then used for elemental analysis. Types of XRF Technology Based on the scattering methods of X-rays, XRF is divided into two types: Energy Dispersive X-ray Fluorescence (EDXRF or EDX) and Wavelength Dispersive X-ray Fluorescence (WDXRF or WDX). EDXRF is more commonly used in the market. Elements Detectable by XRF Testing XRF testing can detect a wide range of elements, including: • Metal Elements: Such as iron, copper, lead, zinc, tin, aluminum, and nickel. These elements are crucial in common materials. • Non-Metal Elements: Such as sulfur, oxygen, carbon, nitrogen, and fluorine. Detection of these elements is mainly applie

An impedance analyzer is a specialized electronic instrument used to measure the impedance characteristics of electronic components, circuits, and material elements. It is capable of characterizing the impedance of devices and materials over a range of frequencies, making it suitable for applications in various fields including material science and electronic circuit design. Operating Principle The core principle of an impedance analyzer relies on phase-sensitive detection technology, which measures the current and voltage responses of the device under test during frequency scanning. Specifically, the analyzer accurately measures the magnitude and phase of complex impedance as it varies with frequency. Key Parameters • Frequency Range: Specifies the range of frequencies over which the impedance analyzer can perform tests. • Impedance Range: Indicates the range of impedance values that can be measured. • Accuracy of Magnitude and Phase: Ensures precise measurement of impedance magnitude