Environmental Chamber | Climatic Chamber | Thermal Chamber | Salt Fog Chamber - LISUN

The needle flame test and the glow wire test are both used to assess the fire resistance of materials, but they differ in their testing principles and applications. Needle Flame Test: The needle flame test evaluates the risk of small flames that may occur under fault conditions in equipment. Specifically, this test utilizes a specified size (diameter of 0.9 millimeters) needle-like burner, which directs a specific gas (such as butane) at a 45-degree angle onto the test sample. The test observes whether the sample ignites, and measures the duration and length of combustion. This test assesses the impact of small internal flames due to equipment faults on safety. Glow Wire Test: In contrast, the glow wire test is used to assess the self-ignition and fire resistance of materials. During the test, a red-hot wire or mesh contacts the test sample, and the test observes whether the sample ignites or stops burning. This test determines the reaction of the material when heated at the contact po...

Environmental testing refers to exposing products or materials to specific conditions, either natural or artificial, to evaluate their performance under realistic storage, transportation, and usage scenarios. This type of testing is crucial for ensuring product quality and performance. High-low temperature test chambers typically involve three main types of testing: natural exposure testing, field testing, and artificial simulation testing. Natural exposure and field testing can be costly and time-consuming, with relatively poor repeatability and consistency in results. However, these tests offer valuable insights into real-world usage scenarios, providing important foundations for artificial simulation testing. Artificial simulation environmental testing is widely used in quality inspection. To ensure comparable and repeatable results, a series of standardized methods for basic environmental testing of products have been established. These standardized methods help ensure the scientif...

Electromagnetic Compatibility Testing (EMC): Ensuring Smooth Operation of Devices Electromagnetic Compatibility Testing (EMC) refers to the ability of devices or systems to operate in their electromagnetic environment in compliance with specified requirements and without causing unacceptable electromagnetic interference to surrounding equipment. EMC design and testing are complementary processes, with the quality of EMC design validated through EMC testing. Sound EMC design is the cornerstone of ensuring proper functioning of products. It is crucial to conduct EMC compatibility prediction and assessment throughout the product design and development process. This helps in early detection of potential electromagnetic interference issues and adoption of necessary suppression and protection measures to ensure electromagnetic compatibility of systems. Failure to address compatibility issues until product finalization or system completion can result in significant human and financial costs f...

The high and low temperature test chamber is an essential device for conducting reliability tests on industrial products. It simulates high and low temperature environments to examine the performance indicators of various products, including electronic appliances, automotive components, aerospace equipment, and marine weaponry. The principle behind the operation of the high and low temperature test chamber primarily relies on temperature control and regulation. Let’s first delve into high-temperature control. Heating is a crucial step in achieving high temperatures within the chamber, which is relatively straightforward. Typically, the chamber employs far-infrared nickel-chromium alloy high-speed heating wires for heating purposes. Temperature control is achieved through a P·I·D+S·S·R system to ensure precise and efficient energy utilization. For low-temperature operation, increasing the number of heating wires and enhancing the temperature control software’s performance are necessary ...

What is Electrostatic Discharge (ESD)? Electrostatic Discharge (ESD) is one of the common sources of interference in electronic devices. According to the national standard GB/T17626.2 (equivalent to the international standard IEC61000-4-2), Electrostatic Discharge (ESD) Immunity TestingESD immunity testing is an essential step to ensure devices are protected from the disruptive effects of electrostatic discharge. ESD occurs naturally and is often observed when humans come into contact with semiconductor devices. For instance, as people walk on synthetic fiber carpets, friction between shoes and the carpet can cause the accumulation of electric charges on the body, leading to electrostatic discharge. Such discharge can generate voltages of up to 15kV, with current pulse waveforms having rise times between 100ps to 30ns. Why Conduct Electrostatic Discharge Testing? Electronic engineers have found that electrostatic discharge can potentially cause semiconductor materials to break down, re...

https://www.lisungroup.com/cases/vietnam-lisun-engineer-support-customer-set-up-optical-radiation-safety-test-lab.html

The ozone aging test chamber is designed specifically to simulate and test the aging performance of materials in an ozone environment. Widely used in the research, production, and quality control of polymer materials such as rubber, plastic, and coatings. This article provides a detailed overview of the ozone aging test chamber’s basic principles, technical parameters, usage methods, and precautions. Basic Principles: The ozone aging test chamber utilizes the oxidative action of ozone to simulate the environmental factors such as ozone concentration and temperature that materials face during actual usage. This accelerates the aging process of materials, allowing for the prediction of future performance changes. The ozone aging test chamber typically consists of several core components: • Chamber: The main body of the test chamber, used to accommodate samples and ozone generators. • Ozone Generator: Produces specific concentrations of ozone. • Temperature Control System: Regulates the t...

Gloss measurement is conducted using a gloss meter, also known as a glossometer, which is an instrument designed to measure the surface specular reflectance (gloss). Gloss is determined by projecting a beam of light onto a surface with fixed intensity and angle and measuring the amount of reflected light at an equal but opposite angle. The method of gloss measurement is based on the principles of light reflection and refraction. When light rays enter a surface, some of the light is reflected back, known as specular reflection. A gloss meter determines gloss by measuring the intensity and angle of this reflected light. Typically, specific light sources and detectors are used in gloss meters to ensure accurate reflection data within a certain angle range. A gloss meter is an instrument used to measure surface glossiness, and the selection of the instrument depends on the type of surface being measured. Different geometries are suitable for different types of surfaces. For non-metallic ma...

In 2020, a global outbreak of the pandemic resulted in a shortage of protective equipment such as masks, primarily due to the scarcity of one of the main raw materials, melt-blown fabric. As a consequence of the melt-blown fabric shortage, some individuals began attempting to produce their own, leading to varying qualities of melt-blown fabric products in the market. Against the backdrop of intensified government crackdowns on counterfeit products, electrostatic flocking equipment for melt-blown fabric has become an indispensable auxiliary product for melt-blown fabric production. Consequently, a range of meltblown electrostatic flocking equipment has emerged in the market, with prices ranging from thousands to tens of thousands of dollars. For customers, understanding the principles behind electrostatic flocking equipment for melt-blown fabric is crucial when selecting the appropriate equipment. Electrostatic flocking equipment employs the principle of static electricity to generate s...

The particle filtration efficiency tester is a specialized instrument used to assess the filtration efficiency of products such as air purifiers, masks, and automotive air purifiers. Its role is to ensure that these products effectively filter out harmful particles and gases from the air, thereby protecting people’s health. The principle of the particle filtration efficiency tester is based on two methods: particle counting and particle weighing. These methods involve introducing particles or gases into the testing system and detecting them using optical or chemical means to determine the effectiveness of the filter. Particle Counting Method: This method uses a laser particle counter to measure the number of particles. During the test, a certain amount of particles is injected into the space where the test object is located. Then, the laser beam scans the area, and the number of particles scanned within a specific time period is recorded. Finally, the filtration efficiency of the filte...

Introduction: In the field of electromagnetic compatibility (EMC), common mode interference is a significant concern, making common mode inductors one of the essential components we frequently utilize. This article aims to provide a brief overview of the principles and applications of common mode inductors. Understanding Common Mode Inductors: Common mode Inductors, also known as common mode interference suppressors, are devices with a ferrite core used to mitigate common mode interference. They consist of two coils of the same size and number of turns wound symmetrically on the same ferrite toroidal core, forming a four-terminal device. Common mode inductors exhibit significant inductance for common mode signals, playing a crucial role in suppressing such interference while having minimal impact on differential mode signals. Their operation is based on the phenomenon where the magnetic flux in the core adds up when a common mode current flows, resulting in significant inductance and i...

Introduction Capacitors are ubiquitous components in electronic circuits, critical for various functions such as energy storage, signal filtering, and voltage regulation. In automated equipment, the reliability of capacitors is paramount, as their failure can lead to significant system disruptions. To ensure their reliability, capacitors must undergo rigorous testing, including leakage current tests, which are essential for assessing the health and performance of these components. The LISUN LS6586 Capacitor Leakage Current Tester is a state-of-the-art instrument designed specifically for testing the leakage current of capacitors. Leakage current is an important parameter that helps identify potential issues such as dielectric breakdown, contamination, or aging in capacitors. This paper explores the process of testing capacitors with the LISUN LS6586 and its application in automated equipment testing, providing detailed insights into its features, benefits, and practical use cases. Unde...

In the field of electronic testing, digital bridges play a vital role. Traditionally, digital bridges were primarily used for measuring parameters such as inductance, capacitance, resistance, and impedance, a practice considered conventional. While early impedance measurements indeed utilized traditional bridge methods, the advent of modern analog and digital technologies gradually phased out this approach. Nevertheless, the nomenclature of digital bridges, such as LCR bridge, persists to this day. Notably, when a digital bridge incorporates microprocessor technology, it is referred to as an LCR digital bridge. Users commonly refer to these devices as LCR meters, LCR bridges, or LCR testers. Digital bridges are extensively employed in measuring the parameters of impedance components, including AC resistance (R), inductance (L) along with its quality factor (Q), and capacitance (C) along with its dissipation factor (D). Consequently, they are often referred to as digital LCR meters. The...

What is Ground Resistance? Ground resistance refers to the resistance encountered by current flowing from the grounding device into the earth and then dispersing to another grounding body or to the distant area. It includes the resistance of the grounding wire and grounding body itself, the contact resistance between the grounding body and the earth, as well as the resistance of the earth between two grounding bodies or from the grounding body to the distant earth. Ground resistance is crucial for several reasons: • Safety: Proper ground resistance ensures the safety of electrical devices by providing a low-resistance path for fault currents to flow to the ground, preventing electric shocks and other hazards. • Interference Suppression: In systems with single-point grounding and high interference, good ground resistance performance is essential for suppressing interference and reducing electrical equipment failures. • Equipment Protection: Adequate ground resistance helps protect equip...

Corrosion testing is widely employed in quality assurance laboratories within the metal industry as a critical step in quality control testing. These tests are typically conducted in salt spray test chambers, covering a range of tests for black metals and alloys. Additionally, corrosion testing is also carried out in the paint and coating industry to ensure the quality of coatings, thereby extending the lifespan of black metals. While corrosion may be considered a neglected topic, its impact on black metals cannot be overlooked. In environments rich in salt, these materials undergo occasional reactions with iron, triggering oxidation reactions that convert ferrous ions into ferric oxide. Over time, these oxidation reactions not only lead to complete product destruction but also provide a breeding ground for microbial reactions, accelerating product damage and failure. To avoid such situations, the paint and coating industry is actively improving the durability of their products and coa...

This customer is a supplier of railway lamp in Netherlands. The company decided to establish its own lighting test laboratory to realize the needs of product development and quality control. The company pursues high -quality, high -precision optical measurement results, and hopes to accurately measure and analyze the Luminous Intensity Distribution. This customer has learned about our related products on a third -party website and confirmed a series of technical issues with us. This customer is more cautious and carefully. Since they have not worked with us before, they did not directly place an order to us. Instead of asking for purchase through our old customers. Although customers are not directly purchase from us, LISUN also directly provides customers with free after sales services support. Because the High Precision Rotation Luminaire Goniophotometer that the customer’s previous inquiry did not require testing the color parameters, they only purchased our standard LSG-1800A High ...

Principle of Common Mode Chokes Common mode chokes (CMCs) are highly effective in dealing with common mode interference signals. Their working principle includes: • Common Mode Interference: When common mode interference current passes through a common mode choke, the magnetic flux direction in both coils is the same. This increases the total inductance rapidly due to coupling, presenting a large inductive reactance to common mode signals, making it difficult for them to pass through. Thus, a common mode choke is also known as a common mode choke coil. • Differential Mode Interference: For differential mode interference signals (i.e., differential mode interference), the magnetic flux cancels each other out, resulting in a small inductance, allowing differential mode signals to pass through without attenuation. The two coils of a common mode choke are wound on a low-loss, high-permeability ferrite core. When current flows through the coils, their magnetic fields reinforce each other. T...

NABL plays a crucial role in enhancing the quality and reliability of laboratory services in India by accrediting laboratories and promoting best practices in testing and calibration. This customer realized that most customer have test requirement and required to get the NABL certificate. So they set up their own lab to provide test services in india and this lab already get the NABL certificated. This customer learn our company from third party website to know about LISUN LSG-6000 LM-79 Moving Detector Goniophotometer (Mirror Type C). At the begaining, they just learn some information about the price and some technical information about LSG-6000 LM-79 Moving Detector Goniophotometer (Mirror Type C). LSG-6000 Moving Detector Goniophotometer (Mirror Type C) was manufactured by LISUN completely meets LM-79-19, IES LM-80-08, COMMISSION DELEGATED REGULATION (EU) 2019/2015, CIE-121, CIE S025, SASO 2902, IS16106 and EN13032-1 clause 6.1.1.3 type 4 requirements. Can meet the test requirements...

https://www.lisungroup.com/news/technology-news/the-importance-of-high-low-temperature-cycling-tests-for-automotive-drive-solenoid-valves.html

https://www.lisungroup.com/news/technology-news/application-and-market-development-trends-of-ipx9k-waterproof-testing-equipment.html

https://www.lisungroup.com/news/technology-news/automotive-connector-housing-protection-level-testing-ipx9-high-temperature-and-high-pressure-water-spray-test.html