LED Tester | Christmas Light Tester - LISUN

LED Luminescent Spectrum   Spectrum is the relative distribution of wavelength and light intensity. The spectrum of LED is generally monochromatic LED, such as blue LED with a peak wavelength of 470nm, with shorter peak wavelength ultraviolet area and with longer peak wavelength green areas as the determination limitation of light intensity. And the spectrum of incandescent lamp, its luminous intensity is widely distributed in the blue area 400nm to 700nm near infrared field, in the field of ultraviolet and infrared can also observe the luminous intensity. As for Fluorescent lamp, the part of combination usage's phosphor light wavelength is the peak of the spectrum. Compared with the ordinary red, green and blue LED spectral peak, the white LED spectrum is different. For example, there are two luminous intensity peaks in the area of blue and yellow, or in the blue field, yellow and red fields, there are three peaks, and even more. This is because the white LED white light is a comb...

Integrating Sphere Development   Integrating Sphere is used for flux measurement, which can make test result more reliable. Integrating Sphere can reduce the measurement error caused by the shape of light, divergence angle and responsiveness difference in different location on detector. Let us learn more details about the development of Integrating Sphere manufacture technology. Picture 1:Old Model Integrating Sphere Picture 1 is old model Integrating Sphere. The hemisphere manufacturing technology of this Integrating Sphere is surrounded by six iron sheets via angle iron, and then two hemispheres are connected by fixture. The bottom adopts adjustable foot to support and fix the whole sphere. Picture 2 Improved Model Integrating Sphere Picture 2 is the improved model integrating sphere. This integrating sphere specification makes no difference with old model. But the critical technologies are that hemisphere is disposable stamping by mould. Technology requirements are very high. Me...

Jacky Installation training in Poland   This Polish customer purchased a High & Low Temperature and Humidity Chamber , IK level Tester and Dustproof Testing Machine from LISUN this time. They are a relatively large lighting manufacturer. We arranged engineer to do installation and training for them when confirm that the customer received the goods. The customer is very satisfied with our service, and indicating that we are the most responsible Chinese manufacturer they have met and will continue cooperating with us in the future.   We share some photos here: [caption id="attachment_8795" align="alignnone" width="800"] Figure 1: Jacky (the right 2) with the client's photo[/caption]   [caption id="attachment_8797" align="alignnone" width="800"] Figure 2: The customer is installing the device[/caption] [caption id="attachment_8798" align="alignnone" width="800"] Figure 3: Customer are ...

Introduction of EMC Testing   EMC (Electro-Magnetic Compatibility) refers to the ability of a device or system to function in its electromagnetic environment and does not constitute an unacceptable electromagnetic disturbance to anything in that environment. EMC is an important indicator of product quality.   EMC tests include:   EMI (Electro-Magnetic Interference): Electromagnetic disturbance testing The purpose of this test is to detect the effects of electromagnetic radiation generated by electrical products on the human body, the public grid, and other electrical appliances that are working properly.   (2) EMS(Electro-Magnetic Susceptibility): Electromagnetic Immunity Test The purpose of this test is to detect electrical products whether can work stable and unaffected in the electromagnetic environment.   EMI tests include:   (1) Radiated disturbance test (RE) - Test standard: EN55022 (2) Conducted disturbance test (CE) - Test standard: ...

    Brief introduction of CE certificates   In recent years, the CE marks are more and more widely used in the market of European economic area (Member states of the European Union and the European Free Trade association, except Switzerland). More customs of different countries set out the requirements of CE certification for imported products. Exporter will be in trouble as well as unnecessary loss if their shipping goods don't have CE certified label. So, what is the importance of CE certification? What are the forms of CE certification so far? And what are the risks of products that has not been certified by CE?   The importance of CE certification   The CE mark on the packaging indicates that it meets the requirements of a series of European directives such as safety, sanitation, environmental protection and consumer protection. In the past, EC(European Community)countries require differently for import and sale of products. The goods which are produced acco...

Advantages and disadvantages for total flux test of Integrating Sphere System and Goniophotometer   According to IESNA-LM-79-80 , the total luminous flux (lumen) of SSL products shall be measured with an integrating sphere system or a goniophotometer. The method may be chosen depending on what other measurement quantities (color, intensity distribution) need to be measured, the size of SSL products, and other requirements.   The integrating sphere system is suited for total luminous flux and color measurement of integrated LED lamps and relatively small-size LED luminaires. The integrating sphere system has the advantage of fast measurement and does not require a dark room. Air movement is minimized and temperature within the sphere is not subject to the fluctuations potentially present in a temperature-controlled room. It should be noted that the heat from the SSL product mounted in or on the integrating sphere may accumulate to increase the ambient temperature of the product...

What are EMC tests?   With the widespread use of electrical and electronic equipment, the problem of electromagnetic disturbance has also brought electromagnetic pollution.   EMC(Electro Magnetic Compatibility) refers to the ability of a device or system to operate within its electromagnetic environment without incurring unacceptable electromagnetic interference to any device in its environment. EMC testing, one the one hand refers to the electromagnetic interference from the devices during normal operation in its environment cannot exceed a certain limit, on the other hand refers to the appliance has a degree of immunity to electromagnetic interference present in the environment. It divides broadly into emissions testing and susceptibility testing.   Electromagnetic Interference (EMI): RE (Radiated Emission): Test unintentional release of electromagnetic energy from an electronic device or apparatus. CE( Conducted Emission): Test the electromagnetic energy travelling ...