10‘‘ colour touchscreen: 1805 & 1886 series
Modern digital technology for safety-current-limited applications or those at 500 VA / 200 mA.
Modern LED lights, too, must be tested for electrical safety and function after production. Because of the completely new technology respective new test techniques are necessary.
Within a few years the industry has revolutionised the lighting industry. Although LED technology has been known for decades it was only used from 2010 for the lighting. There are many advantages in favour of the use of LED technology but for the quick and consistent application in the lighting industry the high efficiency was decisive. Not only the ordinary light bulb has been replaced with LED lights but also mercury vapour lamps in street lights and neon lights in offices. For the final test of lightings electrical safety and function test systems are needed to meet the new requirements of the LED technology and are also prepared for the innovations in future. Only with the use of standard components these requirements can be met.
The techniques of LED lights and light bulbs are completely different. Therefore the requirements for the test technology in terms of the function are also completely different. Safety-related a LED light presents itself identical to a light with old lamps (light bulb or neon tube) – the test requirements have not changed. For lights of protection class I an insulation measurement and a ground bond (PE) test is necessary. Additionally insulation measurements to interfaces or for the power supply may be needed. The requirements for the function test have however changed significantly. Due to the high efficiency currents and outputs are considerably lower. Clocked power supplies of the LED lights stress the mains by means of apparent currents. Therefore it is necessary to measure the phase angle between current and voltage. Through the technology of the LED technology it has meanwhile become very easy and affordable to remote control lights. Already today there are several interfaces available (DALI, DSI, 0 – 10 V etc.) and it can surely be expected that future innovations will open many more possibilities.
By using the standard compact tester KT 1886B with a special extension for LED lights in conjunction with a separate standard PC (or laptop) all required criteria are met. The freely programmable compact tester provides all conceivable safety and function tests and this at a very favourable price. The PC with standard software is only connected via Ethernet (LAN) with the test systems and can be replaced any time. Should any new software applications for the LED interfaces become standard, an extension of the software is easy and cost efficient. In the special LED extension the control interfaces and switch-overs to the DUT find space. Here is enough space for extensions when new technologies become accepted. The concept is complemented by a simple control panel and a (usually customer-specific) connection panel. The future is guaranteed – with the latest test technology of SPS electronic for modern LED technology.
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