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Quantitative PID Tuning Procedures

Textbook

A quantitative PID tuning procedure is a step-by-step approach leading…

Rotating Magnetic Fields in Three-phase AC Induction Motors

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The following animation shows how the “rotating” magnetic…

Learn Fundamental Principles, not Procedures

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“As to methods there may be a million and then some, but…

Basics of Electrical Current

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Current is the name we give to the motion of electric charges from a…

Mathematical Problem-solving Techniques

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Some problem-solving techniques are unique to quantitative problems,…

Kirchhoff’s Current and Voltage Laws

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Two extremely important principles in electric circuits were codified…

Dampers and Louvres

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A damper (otherwise known as a louvre) is a multi-element flow control…

Examples of PLC Systems

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Programmable logic controllers are essentially nothing more than…

Analog Electronic PID Controllers

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Although analog electronic process controllers are considered a newer…

Transmission Control Protocol (TCP) and User Datagram Protocol (UDP)

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At the next OSI Reference Model layer (layer 4) is a set of protocols…

Rotary-stem Valves

Textbook

A different strategy for controlling the flow of fluid is to insert a…

Pneumatic PID Controllers

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A pneumatic controller receives a process variable (PV) signal as a…

Vibration Physics

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One very convenient feature of waves is that their properties are…

Digital PID Controllers

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The vast majority of PID controllers in service today are digital in…

Formulae for Common Chemical Compounds

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Most of these formulae appear in molecular chemical form rather than…

Wastewater Disinfection Example

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The final step in treating wastewater before releasing it into the…

Analyzer Sample Systems

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Some analyzers measure the composition of a process stream by directly…

Sliding-stem Valves

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A sliding-stem valve body is one where the moving parts slide with a…

Different PID Equations

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For better or worse, there are no fewer than three different forms of…

EIA/TIA-232, 422, and 485 Networks

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Some of the simplest types of digital communication networks found in…

WirelessHART Radio Communication Standard

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An exciting development in industrial instrumentation is the…

Advantages and Disadvantages of Pneumatic Instruments

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The disadvantages of pneumatic instruments are painfully evident to…

Classified Areas and Electrical Safety Measures

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Any physical location in an industrial facility harboring the…

Tube and Tube Fittings

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Tube, like pipe, is a hollow structure designed to provide an enclosed…

Proper Care and Feeding of Pneumatic Instruments

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Perhaps the most important rule to obey when using pneumatic…

Analysis of Practical Pneumatic Instruments

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To better understand the design and operation of self-balancing…

Periodic Table of the Ions

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Radio-energy Pulse in Guided-wave Radar Level Measurement

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The following animation shows how a radio-energy pulse travels down…

Comparison of Op-Amp Circuits With Analogous Pneumatic Mechanisms

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Self-balancing pneumatic instrument mechanisms are very similar to…

Diagnosing Feedback Control Problems

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Negative feedback systems, in general, tend to cause much confusion…

FOUNDATION Fieldbus Design Philosophy

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To understand just how different FOUNDATION Fieldbus is from other…

Pilot Valves and Pneumatic Amplifying Relays

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Self-balancing mechanisms consisting solely of a baffle/nozzle…

Rotary-stem Valves

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A different strategy for controlling the flow of fluid is to insert a…

Energy in Chemical Reactions

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A chemical reaction resulting in a net release of energy is called…

The International System of Units

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The very purpose of physics is to quantitatively describe and explain…

P, I, and D Responses Graphed

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A very helpful method for understanding the operation of proportional,…

VSD and VFD Motor Drive Features

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Modern DC and AC motor drives provide features useful when using…

Unit Conversions and Physical Constants

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Converting between disparate units of measurement is the bane of many…

Self-balancing Pneumatic Instruments Principles

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A great many precision instruments use the principle of balance to…

Self-regulating, Integrating, and Runaway Process Characteristics

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Perhaps the most important rule of controller tuning is to know the…