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“Normal” status of a Process Switch

Textbook

Perhaps the most confusing aspect of discrete sensors is the…

Safety Instrumented Functions and Systems

Textbook

A Safety Instrumented Function, or SIF, is one or more components…

Level Sensor Accessories

Textbook

Disturbances in the liquid tend to complicate liquid level…

LRV and URV Settings, Digital Trim (Digital Transmitters)

Textbook

The advent of “smart” field instruments containing…

PID Control Terminology

Textbook

PID control can be a confusing concept to understand. Here, a brief…

Control Valve Actuators

Textbook

The purpose of a control valve actuator is to provide the motive force…

Memory Maps and I/O Addressing

Textbook

A wise PLC programmer once told me that the first thing any aspiring…

WirelessHART Radio Communication Standard

Textbook

An exciting development in industrial instrumentation is the…

Human-Machine Interfaces (HMIs)

Textbook

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

Differential (87) Current Protection

Textbook

One of the fundamental laws of electric circuits is Kirchhoff’s…

Digital PID Controllers

Textbook

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

Electrical Signal and Control Wiring

Textbook

There is much to be said for neatness of assembly in electrical signal…

Design-based Fortifications

Textbook

A design-based fortification is one rooted in technical details of…

Motives for Compromising the Security of an Industrial Control System

Textbook

There are multiple motives for compromising the security of an…

Relay Circuits and Ladder Diagrams

Textbook

Electromechanical relays may be connected together to perform logic…

Vibration Monitoring Hardware

Textbook

The following photograph shows a large air blower in a wastewater…

Digital Data Communication Theory

Textbook

One of the great benefits of digital technology is the ability to…

VSD and VFD Motor Drive Features

Textbook

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

Examples of PLC Systems

Textbook

Programmable logic controllers are essentially nothing more than…

Introduction to Modbus

Textbook

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

Digital PID Algorithms

Textbook

Instrument technicians should not have to concern themselves over the…

Overpressure Protection Devices

Textbook

Fluid pressure exerts force on any surface area it contacts, as…

Introduction to Modbus

Textbook

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

Measuring Electrical Conductivity

Textbook

The electrical conductivity of liquids is an important analytical…

Temperature Sensor Accessories

Textbook

One of the most important accessories for any temperature-sensing…

What is Internet Protocol (IP)?

Textbook

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

References

Textbook

Lipták, Béla G. et al., Instrument Engineers’ Handbook – Process…

P, I, and D Responses Graphed

Textbook

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

Practical Topic Coverage

Textbook

Nearly every technical course teaches and tests students on…

Applications of Spectroscopy for Analytical Measurement

Textbook

Much of our knowledge about atomic structure comes from experimental…

Indicators, Recorders, Process Switches and Alarms

Textbook

So far we have just looked at instruments that sense, control, and…

Techniques for Analyzing Control Strategies

Textbook

Control strategies such as cascade, ratio, feedforward, and those…

Valve Failure Modes

Textbook

An important design parameter of a control valve is the position it…

Continuous Float Level Transmitters

Textbook

Perhaps the simplest form of solid or liquid level measurement is with…

Troubleshooting Current Loops

Textbook

A fundamental principle in instrumentation system troubleshooting is…

DC Motor Speed Control

Textbook

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

Sequential Function Chart (SFC) Programming

Textbook

(Will be addressed in future versions of this book)

Pressure-based Flowmeters

Textbook

All masses require force to accelerate (we can also think of this in…

Radiative Temperature Measurement

Textbook

Temperature measurement devices may be classified into two broad…

Equivalent Series and Parallel Circuits

Textbook

Impedance in a series circuit is the orthogonal sum of resistance and…