In September and October 2013, Chairman Xi put forward a major initiative of building “The Silk Road Economic Belt” and “The 21st Century Maritime Silk Road” (referred to as “One Belt One Road”) when he visit to Central Asia and Southeast Asian countries, which has received a high degree of concern from the international community and a positive response from countries along Central ...
There is a wide range of goniophotometers on sale in the market, including central rotation type, rotation mirror type, double mirror type and so on. How to choose the corresponding goniophotometers for the tested lamps becomes the most important problem for the users. This article makes a brief introduction to this knowledge based on LM-79 and EN 13032-1. A-α B-β and C-γ Co-ordinate System A...
The quality of LED driver will influence the life of LED lamp directly. Therefore, we need to control the quality of LED driver strictly. According to IEC62384-2011 and GB/T 24825-2009 DC OR AC SUPPLIED ELECTRONIC CONTROL GEAR FOR LED MODULES – PERFORMANCE REQUIREMENTS. The control gear shall be subjected to a temperature cycling shock test and a supply voltage switching test as follows: a. Temp...
The International Electrotechnical Commission (IEC) has issued IEC 61000-4-2 Ed. 2.0 (2008-12) entitled “Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test.” This standard relates to the immunity requirements and test methods for electrical and electronic equipment subjected to static electricity discharges, from opera...
The Spectroradiometer Integrating Sphere System, there are two important parts: one is measuring and analysis; another is assistant part which providing testing environmental. Here we will discuss the assistant part, we knew that the integrating sphere spherical aggregates, the inner wall of integrating sphere is coated with a highly reflective coating material to the effect of light refraction. H...
With LED development, the traditional fluorescent tubes in the market are gradually being replaced by LED tubes. Currently LED tubes can be divided into three categories: Type A tube: This lamp can replace the fluorescent tube directly without modification; Type B tube: The power supply of this lamp is built-in LED tube, which can connect with city electricity; Type C tube: Use external power supp...
For IP grade test, we know the regular level IPX1~IPX8, today we will introduce the IPX9K grade test. In the Annex of standard IEC60529-2013 version, it introduces IPX9 High pressure and temperature water jet. Brief description: Protected against high pressure and temperature water jets. Definition: Water projected at high pressure and high temperature against the enclosure from any direction sha...
Intelligent Lighting is the distributed lighting control system by using internet of things technology, wired/wireless communication technology, power line carrier communication technology, and embedded computer intelligent information process and energy-saving control technology to realize the intelligent control of lighting equipment. Shanghai launched a pilot project of the first road intellige...
High Low temperature and humidity test chamber is used to simulate a actual temperature and humidity environment which it may caused any influence for surrounding objects. Electronic products are widely used in various occasions. The temperature and humidity test has become an necessary test item in order to design better product which meet relevant environmental standards. So high/low temperature...
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