Add as home page    Add to your favourites    Hello,Welcome! 【Login】 【Register】
LED Australia
                                                                         Your Position: Home > Articles > LED/Lighting Knowledge > How to Test an LED

How to Test an LED

Monika / 2013-03-04

LED's are becoming one of the most important new technologies. Within a few years, normal incandescent bulbs will be replaced by LED's as they are much more efficient than standard bulbs. Automotive manufacturers have long since replaced the standard bulbs in dashboard and switched back-lighting with LED's and now are replacing tail light and indicator lights with LED's.


One of the biggest problems in LED testing is to accurately measure color and intensity. Electrical testing will tell you that the LED is placed on a printed circuit board and is orientated in the correct direction. It won’t tell you anything about the color or brightness of the LED.


There are many different ways of testing LED colors, such as manual inspection and automated camera-based systems, but they are either error prone or are very expensive with long development cycles.


Universal light probes are small and highly versatile sensors and fiber-optic probes for reliable LED test at minimal cost and ensure the reliable and accurate test of color (including white LED's and intensity for almost every LED color and brightness.


The LED analyzer is an inexpensive product, based on a digital C MOS image sensor and plastic fiber optics cables that allow you to easily guide light between source and the measuring device (the LED analyzer).


Below are instructions for installing the universal light probes (steps 1 through 4) and the LED analyzer (steps 5 through 12).

Universal light probe in

for ATE test

Set and secure all fiber-optic probes and fixture
components in position with the fiber-optic probes centered on the LED under test.

Using the connector cables, connect the Signal,

Power and Ground pins of the sensors to the Automated Test Equipment interface.

Connect regulated D.C. Power supply to sensor
“P” (+) and “G” (-) pins: +5 volts minimum, +40 volts maximum.

LED analyzer

Install the required PC drivers.

Connect the power supply to the LED analyzer.

Connect the communication cable between the LED analyzer
and the computer. USB, serial and parallel ports are available in the LED Analyzer.

Connect the fibers to the light sources.

Start the provided software (Functional Test,
Frequency Demo, LED Demo, Demo Board...).

Press the “Read” or the “Execute” button.

View the results that appear in the program

Next: Something about Down Light Previous: Led Lamp
Home Company Profile Shipping & Freight info Payment Support Sitemaps

© 2005-2019 ALLED Copyright, All Rights Reserved.
Tel: 0285990000 E-mail: