LED Tester | Christmas Light Tester - LISUN

Recently Saudi Arabia released new LED standard  SASO 2902  for energy efficiency, functionality and labeling requirements for Lighting products. We have got the  SASO 2902  in 2017 which is draft and already produce some instruments for some of the Saudi Lab. Such as below products: 1. LPCE-2(9000B) High Precision Spectroradiometer Integrating Sphere System . It can test EEI, Energy Efficiency Class, SDCM, CRI, CCT, Lumen and so on. 2. LSRF-3 Lamp Start, Run-up time and Flicker Tester , which meet Table 13 (on page 27) in SASO2902. The LSRF-3 can be used with LISUN LPCE-2 High Precision Spectroradiometer Integrating Sphere System. 3. LSG-5000 LM-79 Moving Detector Goniophotometer . This test system can make the measurement of Luminous Intensity Distribution, Luminaries Efficiency, Luminance Distribution, Efficient Luminescence Angle, UGR and etc. The test result can be exported as CIE, IES, LDT and other format files. 4. SY2036 Aging and Life Tes...

Electromagnetic Compatibility EMC refers to the ability of a device or system to function properly in its electromagnetic environment and does not constitute an electromagnetic disturbance to anything in the environment.  Sensor electromagnetic compatibility refers to the adaptability of the sensor in the electromagnetic environment, maintaining its inherent performance and the ability to perform specified functions. It contains two requirements: on the one hand, the sensor should not cause electromagnetic interference to the environment in the normal operation process, and the sensor must have a certain degree of immunity to the electromagnetic interference in the environment. Figure 1: the classification of EMC   Figure 2: The Schematic of EMC Introduction of products 1. Conducted radiation interference The RF interference frequency range emitted by this standard covering equipment is 9KHZ-400GHZ. The limits in this standard are determined on a probabilistic basis ...

When doing IEC 61000-4-4 EFT immunity test , there are L1, L2, L3, N and PE interface. PE and earth are two different concepts. Electrical fast pulse interference is common mode, in the experimental setup figure of the standard , we can see the signal cable which is from the test generator can connect with corresponding power lines (L1, L2, L3 , N and PE) through the selectable coupling capacitor, and the signal cable shield connects with the chassis of coupling/decoupling network , and the chassis is connected to the reference ground terminal. This indicates that burst interference is actually applied between the power line and the reference earth, so the interference which is added on the power line is common mode interference, and for the experimental method of using coupled folder, the electrical fast pulse will be added into the tested cable through the distributed capacitance which is between coupling plate and the tested cable. But the pulse which tested cable received is sti...

As we known the quality of LED lighting products depend on two points: One is LED chip(light source); Second is LED power driver. In the practice, there only have few company can provide qualified LED chip such as PHILIPS, OSRAM and CREE in the market. Generally, the LED chip have very small change to get quality problem, but we heard many news about low quality LED lighting products was found and caused big losses to customers because of un-qualified LED driver.  As considering the importance of LED driver, this article will discuss some technical introduction and measurement technology. There have some necessary test items of  LED Power Driver Tester such as Crest Factor, Effective Power, Reactive Power, Apparent Power, Power Factor, Voltage/Current (RMS value, Average value) and THD harmonic parameters etc. In the practice measurement, lots of people found it have big difference between get from LED driver tester and multimeter, and this difference focus on Voltage/curre...

How do you choose integrating sphere if you test small size but high power HID lamp? HID lamp is high intensity discharge lamp. High pressure sodium lamp, high pressure mercury lamp, xenon lamp, metal halide lamp are all belong to HID lamp. We generally use  Integrating Sphere Spectroradiometer Test System  to test the photometric, colorimetric and electrometric parameters. Generally we suggest the diameter size of Integrating Sphere according to the size of lamp under test. If you test single LED or LED chips, we recommend small  integrating sphere  such as IS-0.3M or IS-0.5M. 1.2m luminaries should at least use D=1.5M integrating sphere to measure. If you test high power small size HID lamp, how do we choose Integrating Sphere? If the power of HID lamp is over 200W, we generally recommend use D=2.0m integrating sphere, we will not suggest small integrating sphere because of these reasons: If integrating sphere is too small, cooling is not good, the temperatu...