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

There are many different brands of color spectrophotometers on the market, and even within the same brand, there are multiple products available. The handheld and desktop types are the most popular categories, but what are the differences between these two types? Portable Colorimeters – also known as Portable spectrophotometers Can directly read data and connect to a computer through software: Small size, convenient to carry, high accuracy, and moderate price. Easy to operate, even ordinary personnel can easily handle it. Desktop Colorimeters – also known as Benchtop Transmittance Spectrophotometer: Equipped with a reading window, used with color matching software when connected to a computer, has high accuracy color matching function, large size, stable function, and high price. As we all know, Benchtop Transmittance Spectrophotometer are more accurate and consistent than portable devices. When using strict tolerances or setting color specifications, desktop devices are usually the pr...

I. Introduction of Surge Generator Surge generators are important equipment in electrical systems. Their main function is to simulate high-voltage pulses or instantaneous voltage fluctuations to test and evaluate the effectiveness of different surge suppression systems. These high-voltage electrical devices mainly serve to prevent transient voltage fluctuations from damaging electrical systems, thus safeguarding production. Surge generators play a crucial role in measuring the suppression capabilities of electrical systems. They are able to generate high-voltage pulses to simulate lightning strikes or other sudden high-voltage current events, testing the efficiency and reliability of suppression systems. If these suppression systems cannot withstand these high-voltage pulses, it means that they are unable to effectively protect the electrical system, which may lead to production interruptions and equipment damage. Therefore, surge generators are essential tools for ensuring that electr...

What is Damped Oscillation: Damped oscillation is a type of non-harmonic motion commonly seen in systems such as spring oscillators and pendulums. It is a vibration in which the amplitude gradually decreases over time due to the presence of factors such as friction and resistance, also known as damping. The vibrating system continuously overcomes external resistance and consumes energy, causing the amplitude to decrease until the vibration eventually stops. This energy-decreasing vibration is called damped oscillation. Unlike harmonic oscillation, damped oscillation is non-periodic. Damped oscillation systems belong to dissipative systems, and their damping properties can be quantitatively represented. Damping also includes any influence and cause of energy decay in the vibrating system. Therefore, damping can be caused by external forces or inherent characteristics of the system. In summary, damped oscillation is a special vibration phenomenon in which energy gradually decreases. Damp...

What is Coupling and decoupling? Coupling is the energy exchange linkage between two circuits or two parts in one circuit, enabling energy to be transmitted from one circuit to another or from one part to another. Decoupling is the prevention of energy feedback from one circuit to another, to avoid unpredictable feedback reactions, resulting in abnormal operation of the next level amplifier or other circuits. Analyzing further the working principle of the coupling-decoupling network: By separating noise from the circuit with the coupling-decoupling network, the signal can be made cleaner and more stable. The coupling-decoupling network is composed of two capacitors and one inductor. The two capacitors are responsible for separating the high-frequency signal from the direct current signal, and the signal is separated through the inductor. When the high-frequency signal passes through the inductor, the bias voltage will change, thus changing the amplitude of the voltage on this basis. In...

The High and Low Temperature Termal Shock Chamber is the main equipment of modern reliability laboratories, which simulates the changes in cold and hot environments for testing, and is used for cold and hot cycles of various materials and environmental stress tests under high and low temperature impacts. The physical changes and material properties of the product after the environmental test of thermal expansion are evaluated through the cold and thermal shock test. The testing products include cycling tests on materials such as lithium batteries, metals, rubber, and rapidly changing electronics, to test the stability of the materials. From the perspective of LED product quality, whether it is indoor or outdoor, the environmental climate of LED depends to a certain extent on the LED utilization rate. The high and low temperature impact test chamber environmental testing equipment can simulate the rapidly changing climate of high and low temperatures in the natural environment. The LED ...

Transformer preventive testing, a crucial component of power equipment operation and maintenance, has long been given priority by the state. Practical experience suggests that following inspection regulations enables the inspection to make full use of its role and safeguard the safe operation of power equipment. With the enhancement of insulation level and the continuous advancement of computer technology, the intelligence construction of power equipment is gradually being promoted. Preventive testing is also facing new changes. In the future, it will move towards scale, information and intelligence, and the equipment such as transformer and circuit breaker can be effectively monitored and diagnosed by testing laboratory. The use of information technology and automation technology will be used for preventive testing of power equipment, to enhance the safety performance of power equipment operation and realize scientific management of preventive testing. Therefore, the application of tr...

The High Temperature Pressure Jet Waterproof Test Chamber is an important experimental equipment, usually made of materials such as stainless steel or domestic steel plates. It can simulate high-temperature and high-pressure conditions in real environments, and conduct reliability testing and performance verification on products in experiments. Its main function is to spray high-pressure and high-temperature water into materials, components, and various product equipment through water pumps or pressure conveying systems in high-pressure, high-temperature, and high humidity environments for spraying testing to evaluate their durability and reliability. It can be applied to industries such as automobiles, electrical appliances, LED outdoor lighting, and has a wide range of applications. What is the function of the High Temperature Pressure Jet Waterproof Test Chamber? The High Temperature Pressure Jet Waterproof Test Chamber has the characteristics of stable temperature control, wh...

Capacitance  refers to the ability to hold a charge. It is a medium for realizing the storage and release of static charges, with the characteristic of permanent charge storage. Capacitor components are widely used in power supply filtering, signal filtering, signal coupling, resonance, filtering, compensation, charging and discharging, energy storage, and power separation in circuits. According to its ability to accommodate charges, it is generally measured in Farads, and the international unit is Farads. Therefore, capacitors are essential components for electronics and power. The role of capacitors: Bypass capacitors and decoupling capacitors are two devices that provide energy storage for local devices. Bypass capacitors can reduce load demand, make the output of the voltage regulator smooth, similar to a small rechargeable battery, and can be discharged and charged. The decoupling capacitor can smooth the edge signals of the device, so as to prevent the input signal from being too...

Photometric Testing is an important step in ensuring the intensity and distribution uniformity of street lights. The luminance measurement is a commonly used testing instrument that can measure the photometric distribution of street lights and provide accurate data analysis. This article will discuss the methods and steps of using a luminance measurement for Photometric Testing, as well as some considerations. LISUN 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. LSG-6000 is the latest upgraded product of LSG-5000 and LSG-3000 in compliance with the requirements of the LM-79-19 standard Clause 7.3.1, its an automatic light distribution intensity 3D curve testing system for measuring light. The darkroom can be designed according to the customer’s existing room size. LM-79 Moving...

This article briefly explores the causes and consequences of ESD and EMI in mobile audio systems. It then discusses the use of ESD suppressors and EMI filters to mitigate these threats. Finally, it compares three current solutions. Modern materials and technologies have led to the frequent occurrence of electrostatic discharge (ESD) and electromagnetic interference (EMI), which pose significant risks. Our clothing and the objects we come into contact with can generate static electricity. Digital technology also generates electromagnetic interference. ESD can damage electronic components in mobile phones. While phones are easily replaceable, they can cause significant harm to users. Phone circuit designers must ensure that necessary measures are taken to eliminate ESD damage. EMI in audio circuits can result in poor sound quality, with audible issues such as hisses, pops, and hums. Mobile phone users cannot tolerate such interference. Therefore, efforts must be made to filter out EMI in...

With the development of technology and increasing environmental awareness, people are paying more attention to the environmental friendliness of products. RoHS (Restriction of Hazardous Substances) is a regulation issued by the European Union that aims to restrict the use of hazardous substances in electronics and electronic equipment to protect human health and the environment. RoHS testing refers to the testing of hazardous substances in products to ensure compliance with the restrictions of the RoHS regulation. LISUN RoHS is a mandatory standard established by EU legislation. Its full name is “Restriction of Hazardous Substances” (Restriction of Hazardous Substances). This standard has been formally implemented since July 1, 2006 which is mainly used to regulate the materials and process standards of electrical and electronic products. And making it more conducive to human health and environmental protection. The purpose of this standard is to eliminate six items of lead, mercury,...

We know that the quantification of color and light is in an abstract sense, so the differences in color and other physical differences are distinct. For example, when we use a measuring stick to measure the length of an object, people often arbitrarily divide it into uniform small segments. Even small lengths that cannot be distinguished by the human eye can be judged by measuring tools. But when people use Colorimeters to measure the color of objects, it is different. Firstly, people cannot correctly distinguish the amount of color difference, and they cannot use physical instruments to analyze and measure colors because color data has meaningless numerical values. This is also the reason for the emergence of color difference meters, which are precision and complex color detection tools. In colorimetry, people call the color difference (range of change) that cannot be felt by the human eye the wide capacity of color. The capacity of the color scheme reflects the distance between c...

Electrical Safety Withstand Voltage Test Standards： Electrical Safety Withstand Voltage Test is an important indicator for measuring the insulation performance of electrical equipment, and its effective measuring standards are: For general test equipment, leakage current values between the spark wire and the shell can be measured, the basic standard requires two times the working voltage plus 1000V as the test voltage value, sometimes it may exceed this standard value. According to IEC 61010, Electrical Safety Withstand Voltage Test requires that the test voltage must be slowly increased to the required test voltage within 5 seconds, the voltage should be stabilized and loaded at the measured insulation body for more than 5 seconds, and the comparison of the leakage current with the standard leakage current threshold can determine whether the insulation performance of the tested product meets the requirements. The withstand voltage performance of the test equipment is an important ...

What is Hot Wire Test? Hot wire test is a common experiment methodology that is used to study the combustibility and thermal stability of materials. By placing the material above the hot wire and heating the hot wire, it is possible to evaluate the fire hazard and fire protection performance of the material by observing whether the material is ignited and the burning behavior after ignition. Principle of Hot Wire Ignition Test: The principle of hot wire ignition test is to utilize the heating effect of hot wire to expose the material to high temperature conditions to simulate the thermal radiation that the material receives in a fire. When the temperature of the hot wire reaches a certain degree, the material may be ignited and generate flames and smokes. Hot wire ignition test is mainly used for the fire hazards test of the materials of electronic and electronic products and household appliances. It is equivalent to simulate a thermal source or simulate the photofinishing element and ...

The ozone aging test chamber is mainly used to study the action law of rubber, simulate and strengthen the ozone conditions in the atmosphere, and achieve rapid identification and evaluation of rubber’s ozone aging resistance performance and the protective effect of ozone agents; Furthermore, effective anti-aging measures are taken to improve the service life of rubber products. Usage of ozone aging test chamber: 1. Turn on the main power switch to power on the equipment; 2. Fix the sample on a fixture or place it in a turntable; 3. Press the “Start”, “Turntable”, and “Ozone” switches; 4. Set the ozone concentration and test temperature according to the requirements of the experiment; a. Ozone concentration setting: click the “SET” key once, the green Nixie tube in the lower row of the instrument flashes, use the “” position option to move the position of the number of digits to be changed, and use the “” increase key and “” decrease key to change the size of the set value digits; Afte...