Department of Electronics & Communication Engg.
Course: Instrumentation system design
Course Code: ECE 211
DOA:22.02.2011 Homework 2 DOS: 28.02.2011
PART A:
A 3 digit voltmeter is used for measuring voltage and lowest rang is 0-10V.
Find the resolution and of the instrument and sensitivity.
How would a voltage of 26.29 be displayed on 10 V range?
How would be a reading 26.29 be displayed on 100 V range?
How would be a reading 0.6452 be displayed on the above mentioned display?
What is an electronic counter? How can it be used to measure the totalising? How the display is connected with circuit.
Explain the process how we can measure 70Hz frequency with Digital measurement of mains frequency meter having clock frequency of 1MHZ?
PART B
A CRO with a sensitivity of 5 V/cm is used. An ac voltage is applied to the Y-input. A 10 cm long straight line is observed. Determine the ac voltage?
What is the oscilloscope probe compensation and how it is adjusted? What effects are noted when the compensation is not correctly adjusted?
On what principle does a digital capacitance meter operate?
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