Q.3 (A) A Liquid level control system linearly converts a displacement of 2-3meters into a 4-20 mA control signal. A relay serves as a two positioncontroller to open or close the inlet control valve. The relay closes at 12 mAand opens at 10 mA. Find (a) the relation between displacement and current,and (b) neutral zone in meters? Q.3 (B) A proportional integral (PI) controller is used in a certain level controlsystem in which the input for the controller is sinusoid in nature . Prove thatthe phase lag is a function of reset time.
Q.3 (A) A Liquid level control system linearly converts a displacement of 2-3meters into a 4-20 mA control signal. A relay serves as a two positioncontroller to open or close the inlet control valve. The relay closes at 12 mAand opens at 10 mA. Find (a) the relation between displacement and current,and (b) neutral zone in meters? Q.3 (B) A proportional integral (PI) controller is used in a certain level controlsystem in which the input for the controller is sinusoid in nature . Prove thatthe phase lag is a function of reset time.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Q.3 (A) A Liquid level control system linearly converts a displacement of 2-3
meters into a 4-20 mA control signal. A relay serves as a two position
controller to open or close the inlet control valve. The relay closes at 12 mA
and opens at 10 mA. Find (a) the relation between displacement and current,
and (b) neutral zone in meters?
Q.3 (B) A proportional integral (PI) controller is used in a certain level control
system in which the input for the controller is sinusoid in nature . Prove that
the phase lag is a function of reset time.
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