BASIC INSTRUMENTATION MEASURING DEVICES AND BASIC PID CONTROL


INTRODUCTION
Instrumentation is the art of measuring the value of some plant parameter,
pressure, flow, level or temperature to name a few and supplying a signal
that is proportional to the measured parameter. The output signals are
standard signal and can then be processed by other equipment to provide
indication, alarms or automatic control. There are a number of standard
signals; however, those most common in a ....etc

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HONING

Honing is an abrasive machining process that produces a precision surface on a metal workpiece by scrubbing an abrasive stone against it along a controlled path. Honing is primarily used to improve the geometric form of a surface, but may also improve the surface texture.

Typical applications are the finishing of cylinders for internal combustion engines, air bearing spindles and gears. There are many types of hones but all consist of one or more abrasive stones that are held under pressure a ....etc

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President Nicolas Maduro said the diplomats comprise 48 hours to pull out the surroundings, saying Yankees, time exposed house!Mr Maduro says he has signify that the triplet took to some extent in a power-grid impairment in September and had bribed Venezuelan companies to cut down production.The Pooled States and Venezuela have been without ambassadors in each other's capitals since 2010. The diplomats expelled arrange been named as Kelly Keiderling - the accusation d'affaires and the most superior US diplomat in Caracas - Dav ....etc

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difference between honing lapping and super finishing process ....etc

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Basic Process Control

pen vs Closed Loop
! Closed loop
! Automatic control
! Open Loop
! Manual control
! Person takes the place of the controller

A problem
Output initially 50%, Gain = 2, reset = 2 minutes per repeat
A direct acting controller control is subjected to a sustained
error of 5%
What is the output after 4 minutes?
Proportional Response = ke = 2x5=10%
Integral Action- in 4 minutes the control will go through 2 repeats.
Integral a ....etc

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basic antenna theory ppt

Antenna theory and antenna terminology can seem complicated to the uninitiated. A lot goes into designing antennas but with a little bit of guidance and explanation, antenna users (network designers, systems integrators, end users) can read through the antenna specifications and choose the right antenna style for their wireless network design.

In this paper we will go over some simple techniques to help you better understand some terminologyused and how it is applied in the Antenna industry. This will be part one of a ....etc

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