sharadsinha

A Case For Electrical and Eelectronic Measurement

In Design Methodologies, Education, Embedded Systems on October 23, 2012 at 12:36 AM

Perhaps one of the least emphasized part of university education in electrical, electronics or computer engineering is related to the field of electrical and electronic measurements. Electrical measurements generally involve measuring current, voltage and resistance. In an embedded systems that has sensors, such measurements can play a critical role. The output of these sensors are converted to either current or voltage before further processing in software or hardware. Not only to test such a system but also to design it properly, it is important to understand the basic concepts of measurement like accuracy, repeatability, resolution, instrument error, instrument noise, capacitance of cables, probe resistance, instrument calibration etc. I had my first real experience with some really tough measurements to be done on an OC192 board for a telecommunication application while trying to debug some issues. I must say that while we place a lot of emphasis on software and hardware design issues, it is also important to consider the measurement side of the story in order to test if  the software and the hardware are working properly. Measurement concepts like instrument calibration, sensitivity and timing are very important in a test set-up. Sometimes, we miss out these things resulting in a mismatch between requirements and implementation.  Keithley’s Getting back to the Basics of Electrical Measurements is  good for introduction as well as for refreshing one’s basic knowledge.

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