Chapter 02A - Analog &amp; Digital Instrumentation

# Chapter 02A - Analog &amp; Digital Instrumentation -...

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HAPTER II CHAPTER II INTRODUCTION TO ANOLOG AND DIGITAL NSTRUMENTATION INSTRUMENTATION Dr. Abdirahman

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NUMERICAL REPRESENTATION ± Consists of analog representation and digital UR C R R S O representation. 1. Analog Represantation ± Defined as a quantity which is represented by another quantity and is directly proportionate to the first quantity. Example: a car speedometer where the movement of the needle shows the speed of the car. ± One important feature is that an analog uantity can be in a continous range of value quantity can be in a continous range of value. Example: The speed of the car can be anywhere in between 0 to 100 kilometres per hour (km/h). Dr. Abdirahman CHAPTER 2 Page 2of 15
Example of An Analog Signal Dr. Abdirahman CHAPTER 2 Page 3of 15

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Dr. Abdirahman CHAPTER 2 Page 4of 15
fi d tit th t t Digital Representation ± Defined as a quantity that represents a symbol known as “digit”. ± Digit has two actual values: LOW and HIGH. Example : In the form of electrical

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## This note was uploaded on 05/09/2010 for the course CHE 3022 taught by Professor Abdirahman during the Fall '07 term at National Central University.

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Chapter 02A - Analog &amp; Digital Instrumentation -...

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