LED Tester | Christmas Light Tester - LISUN

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...

The full name of IEC 60068-2-1 is Environmental Testing Part 2-1: Tests-Test A: Cold. It is edited by the IEC technical committee in 2008.We will introduce the IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold The following is the original content of IEC 60068-2-1 IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold This part of IEC 60068 deal with cold tests applicalbe to both non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods. The object of the cold test is limited to the determination of the ability of components, equioment or other articles to be used, transported or stored at low temperature. Cold tests cover by this standard do not enable the ability of specimens to withstand or operate during the temperature vari...

The full name of IEC 60068-2-75 is Environmental testing-Part 2-75: Tests- Test Eh: Hammer tests . It has been prepared by IEC technical committee 104:Environmental conditions, classification and methods of test. We will introduce the IEC 60068-2-75-1 Scope The following is the original content of IEC 60068-2-75-1. IEC 60068-2-75-1 Scope This part of IEC 60068 provides three standardized and coordinated test methods for determining the ability of a specimen to withstand specified severities of impact. It is used, in particular, to demonstrate an acceptable level of electrotechnical items. It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions. This part of IEC 60068 covers energy levels ranging from 0.14J (joules) to 50J(joules). Three types of test apparatus are applicable to perform these tests. Annex C provides some guidance to this aspect. Here is the IK level test (Impact Prote...

The principle of ultraviolet disinfection is to use ultraviolet radiation to cause photolysis and denaturation of bacteria proteins, and the amino acids, nucleic acids and enzymes of bacteria are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the oxygen in the air is ionized to generate ozone, which strengthens the bactericidal effect. Ultraviolet is mostly used for disinfection of air and objects, with a wavelength of 253.7nm. For air disinfection, the effective distance does not exceed Zm, the irradiation time is 30 ~ 60min, for the disinfection of items, the effective distance is 25 ~ 60cm, the irradiation time is 20-30min, and the timer starts from 5-7min when the light is on. In order to ionize oxygen in the air to produce ozone). When the ultraviolet lamp used for disinfection is at a voltage of 220V, an ambient relative humidity of 60%, and a temperature of 20 ° C, the radiation intensity of 253.7nm ultraviolet rays should not be less than ...

The principle of ultraviolet disinfection is to use ultraviolet radiation to cause photolysis and denaturation of bacteria proteins, and the amino acids, nucleic acids and enzymes of bacteria are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the oxygen in the air is ionized to generate ozone, which strengthens the bactericidal effect. Ultraviolet is mostly used for disinfection of air and objects, with a wavelength of 253.7nm. For air disinfection, the effective distance does not exceed Zm, the irradiation time is 30 ~ 60min, for the disinfection of items, the effective distance is 25 ~ 60cm, the irradiation time is 20-30min, and the timer starts from 5-7min when the light is on. In order to ionize oxygen in the air to produce ozone). When the ultraviolet lamp used for disinfection is at a voltage of 220V, an ambient relative humidity of 60%, and a temperature of 20 ° C, the radiation intensity of 253.7nm ultraviolet rays should not be less than ...

The full name of EN13032-1 is Light and lighting Measurement and Presentation of photometric data of lamps and luminaires. It is edited by CEN in 2004. This standard is a guide to procedures referring where necessary to the relevant CIE, ISO and CEN publications . We will introduce the clause 6.1.1.3 Goniophotometer type 3 in this article. The following is the original content of EN 13032-1 6.1.1.3 Goniophotometer type 3. 6.1.1.3 Goniophotometer type 3 The light source is rotated around a vertical axis, a mirror arrangement around a horizontal axis. The photometer head is fixed. The mirror shall not limit the view of the light source from the photometer head and to be plane. They should have a spectrally constant reflectance or their spectral reflectance shall be considered for the V(λ) correction of the used photometer head.  Attention shall be paid to the polarization of the radiation due to reflection by the mirrors and the local situation of the reflection. The goniopho...