The three steps to improved LED light measurements begin with power. Jeff Hulett, Vektrex CTO, teaches how to identify current source power limitations that may negatively impact your LED light measurements.
Instrumentation and the selected measurement method are key factors to improving your LED light measurements. Sustained power is the foundation for improved LED light measurement:
Improving LED High Power Measurements
LED devices, including COB, array, luminaires, emitters and others are moving to higher power levels. Understanding the power limitations of current sources and source measure units (SMU) is important. For example, with many current sources, Keithley included, 1000W of advertised power does not mean that 1000W of sustained power is possible. In this first segment of the webinar series, Hulett teaches how to identify current source power limitations that may negatively impact your LED light measurements.
How Much Power Is Enough?
Continuous power conversion is required to supply the sustained power necessary for performance LED light measurements. SpikeSafe Performance Current Sources and Pulsed Source Measure Units are available with voltages to 400V and currents to 60A. They provide continuous power conversion in DC and pulse modes; with no pulse width or duty cycle limitations. While continuous pulse method is optimal for light measurements, these performance current sources support all three LED test methods as documented by LED light measurement standards (IESNA LM-85, CIE TC2-063): DC, Single Pulse, and Continuous Pulse.
This webinar will help you learn how to improve your LED light measurements.
In part two of this webinar series, Hulett focuses on accuracy. Once you have a current source that can use the three key measurement methods specified in LM-85, DC, Single Pulse, and Continuous Pulse, the question becomes: which method will yield the most accurate measurements?
Part three of the series discusses which factors must be controlled for optimal repeatability. Hulett gives examples of what to look for (and what to avoid) in your test and measurement equipment.
Learn more about SpikeSafe Performance Precision Pulsed Current Sources and SpikeSafe Pulsed Source Measure Units.