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Non-dispersive Luft Detector Spectroscopy

Textbook

Non-dispersive analysis, while newer in discovery than dispersive…

Human-Machine Interfaces (HMIs)

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Human-machine interfaces, or HMIs, are a critical part of nearly all…

Transfer Function Analysis

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An extremely important topic in engineering is that of transfer…

Common Control Valve Problems

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Valves can experience a number of problems, most of them either…

Logic Programming in PLCs

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Although it seems each model of PLC has its own idiosyncratic standard…

Examples of PLC Systems

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Programmable logic controllers are essentially nothing more than…

How to Teach Yourself PLC Programming

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Learning PLC programming is a very important skill. If your job…

Feedforward Control

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“Feedforward” is a rather under-used control strategy…

Directional Overcurrent (67) Protection

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While 50 and 51 (instantaneous and time overcurrent) relay functions…

Ladder Diagram (LD) Programming Contacts and Coils

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In the United States, the most common language used to program PLCs is…

High-reliability Control Systems

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As discussed at the beginning of this chapter, instrumentation safety…

Analog Electronic PID Controllers

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Constructing PID control systems using discrete components is a…

Ultrasonic (Sound) Echo Level Measurement

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A completely different way of measuring liquid level in vessels is to…

Digital PID Controllers

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

Polyphase AC Power

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“Polyphase” means “many phases,” describing a…

Control Valve Sizing

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When control valves operate between fully open and fully shut, they…

Introduction to Optical Analysis

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Light is known to interact with matter in very specific ways, which…

Circuit Failure Analysis

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Perhaps the most valuable skill an instrument technician can possess…

Calibration Errors and Testing

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The efficient identification and correction of instrument calibration…

Numerical Integration

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As we have seen, the concept of integration is finding the…

Laminar Flowmeters

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A unique form of differential pressure-based flow measurement deserves…

Open-ended, Shorted and Properly Terminated Transmission Lines

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Many years ago, when I was first learning about electricity, I…

Examples of PLC Systems

Textbook

Programmable logic controllers are essentially nothing more than…

Control Valve Characterization

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Control valves are supposed to deliver reliable, repeatable control of…

Radiation Level Measurement

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Certain types of nuclear radiation easily penetrates the walls of…

Legal Code

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Creative Commons Attribution 4.0 International Public License By…

P, I, and D Responses Graphed

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Visualizing the actions of P, I, and D tuning parameters using graphs…

The Difference Between Series and Parallel Circuits

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In addition to Ohm’s Law, we have a set of rules describing how…

What is Internet Protocol (IP)?

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I remember first learning about the world-wide Internet, and wondering…

FOUNDATION Fieldbus Function Blocks

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Data-processing modules within FF systems are known as function…

Applications of Spectroscopy for Analytical Measurement

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Much of our knowledge about atomic structure comes from experimental…

Cascade Control

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A simple control system drawn in block diagram form looks like this:…

Rotating Phasor in Three-dimensional Form

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The following animation shows a rotating phasor in three-dimensional…

Glossary of Cyber-security Terms

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Cyber-security seems to have its own vocabulary, ranging from unwieldy…

Filled-bulb Temperature Sensors

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Filled-bulb systems exploit the principle of fluid expansion to…

Basics of Electrical Current

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

Level Sensor Accessories

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Disturbances in the liquid tend to complicate liquid level…

Common Control Valve Problems

Textbook

Valves can experience a number of problems, most of them either…

Calibration Errors and Testing

Textbook

The efficient identification and correction of instrument calibration…

Ions in Liquid Solutions

Textbook

Many liquid substances undergo a process whereby their constituent…