The CV model load is the basic of the LED power supply test. CV is constant voltage, but the load is only the current load equipment, itself does not provide constant voltage, therefore, the so-called CV is just through the voltage negative feedback circuit, to servo the change of LED power supply output current, to make the LED output capacitor charge balance, thus achieve the purpose of constant...
Glow wire test is to test the stability of electrical and electronic products during working. And the hot wire itself is the resistance wire ring with fixed size. When doing test, the wire ring should be heated up to the specified temperature by electricity, so that the time when the top of the wire reached the sample can meet the time standard required, then observe and measure its state. The tes...
IEC 60529 (GB4208-2008) IP code is a coding system to indicate the degrees of protection provided by an enclosure against access to hazardous parts, ingress of solid foreign objects, ingress of water and to give additional information in connection with such protection IP code includes 4 digits, like IP23CH. IP short for ingress protection; numeral 2 stands for first characteristics and can be ins...
Power supply is the device to change other forms of energy in to electric energy. Power supply products are widely applied in industry automation control, military equipment, scientific equipment, industrial equipment, computers, communications equipment, electrical equipment, instruments, medical equipment, semiconductor refrigeration and heat and other fields. There are two common types of major...
The 2015 New Delhi Autumn LED Expo was successfully held during 3th December~5th December. As one of India biggest exhibition, this exhibition main relate different lighting solutions include the LEDs, LED Luminaries, LED Package, Intelligent Building Lighting Design and LED Testing Equipment. To make sure better service India customers, Lisun India Office attended this exhibition to show latest L...
1. Japanese Lighting Market According to Japan’s Lighting Industry Association (JLMA) statistics, lamps and lighting product development trend will be more and more closed to LED lamps products. As the end of 2014, LED lamps and lighting products in the proportion of shipments reached nearly 70% (view chart). The Development of Energy Management Control System in Japan And in the specific classi...
CIE Published Latest CIE S025 LED Lamps, LED Luminaires and LED Modules Test Standard CIE has recently published the first international measurement standard for LED Lamps, LED Luminaires and LED Modules, ie. CIE S025(http://div2.cie.co.at/?i_ca_id=563). CIE Division 2 will present a two-day tutorial on the new standard which includes practical work in the laboratories of the Photometry and Applie...
According to CIE, EN and LM-79(Clause 9.1) etc standards, spectroradiometer integrating sphere system is used for all kinds of light source photometry parameters test. The following introduces Lisun several different spectrometers’ characteristics and applications briefly. LMS-9000A/LMS-9000B High precision CCD spectroradiometer. LMS-9000A is mainly used for LED light source test. Test datas me...
1. According to the reflectivity of the internal coating: How to choose integrating sphere Note: It can select the coating according to the test requirement, the default is the BaSO4 coating. 2. According to the test method: We don’t discuss both the integrating sphere and goniophotometer here, we only talk about integrating sphere optics. How to choose integrating sphere Specification: The abov...
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