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Introduction to Modbus

Textbook

Developed by the Modicon company (the original manufacturer of the…

Interposing Relays in PLCs

Textbook

In addition to directly performing logic functions, electromechanical…

Comparison of Op-Amp Circuits With Analogous Pneumatic Mechanisms

Textbook

Self-balancing pneumatic instrument mechanisms are very similar to…

Physics and Chemistry Terminology and Definitions

Textbook

Atom: the smallest unit of matter that may be isolated by chemical…

4-wire “Passive” Versus “Active” Output Transmitters

Textbook

Some self-powered (4-wire) analog electronic transmitters are designed…

DC Motor Speed Control

Textbook

DC electric motors generate torque by a reaction between two magnetic…

Glossary of Cyber-security Terms

Textbook

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

Open-ended, Shorted and Properly Terminated Transmission Lines

Textbook

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

Rotary-stem Valves

Textbook

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

Standardized Volumetric Flow

Textbook

The majority of flowmeter technologies operate on the principle of…

Understanding Area, Volume and Common Geometry

Textbook

Area refers to the size of two-dimensional surface. Volume refers to…

Resistance, Reactance and Impedance

Textbook

Resistance (\(R\)) is the dissipative opposition to an electric…

Single-line Electrical Diagrams

Textbook

Electrical power grids primarily consist of three-phase AC circuits.…

Fiber Optic Data Communication

Textbook

Light has long been used as a long-range signaling medium. While…

Proportional-only Control

Textbook

Imagine a liquid-level control system for a vessel, where the position…

AC Motor Braking

Textbook

There are several different methods useful for causing an AC induction…

Ratio Control

Textbook

Most people reading this book have likely had the experience of…

Electromagnetism Basics

Textbook

The fundamental principle of electromagnetism is that an electric…

The Basics of Control Relays

Textbook

An electromechanical relay is an electrical switch actuated by an…

Supervisory Control

Textbook

In a manually-controlled process, a human operator directly actuates…

EIA/TIA-232, 422, and 485 Networks

Textbook

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

4-wire (“self-powered”) Transmitter Current Loops

Textbook

DC electric current signals may also be used to communicate process…

Safety Gas Analyzers

Textbook

Process analyzers measure the concentration of specific substances for…

Comparison of Op-Amp Circuits With Analogous Pneumatic Mechanisms

Textbook

Self-balancing pneumatic instrument mechanisms are very similar to…

Feedforward Control

Textbook

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

Transfer Function Analysis

Textbook

An extremely important topic in engineering is that of transfer…

Non-dispersive Luft Detector Spectroscopy

Textbook

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

Instrument Turndown (Rangedown)

Textbook

An important performance parameter for transmitter instruments is…

Analog to Digital Conversion and ADCs

Textbook

In order to provide an interface between the internal (digital) world…

Standardized Volumetric Flow

Textbook

The majority of flowmeter technologies operate on the principle of…

Chemiluminescence Measurement

Textbook

Recall that an exothermic chemical reaction is one that releases a net…

Applications of Spectroscopy for Analytical Measurement

Textbook

Much of our knowledge about atomic structure comes from experimental…

Transmitter Damping Adjustments

Textbook

The vast majority of modern process transmitters (both analog and…

Introduction to Calculus

Textbook

Few areas of mathematics are as powerfully useful in describing and…

Policy-based Fortifications

Textbook

These fortifications focus on human behavior rather than system design…

Electronic Structure

Textbook

Earlier in this chapter you were shown a model of a nitrogen atom with…

Fiber Optic Data Communication

Textbook

Light has long been used as a long-range signaling medium. While…

Analog Signal Conditioning and Referencing

Textbook

Modern analog-to-digital converters are phenomenally accurate,…

Practical Measures of Reliability

Textbook

In reliability engineering, it is important to be able to quantity the…

Calibration Errors and Testing

Textbook

The efficient identification and correction of instrument calibration…