“Radio” systems use electromagnetic fields to communicate information over long distances through…
Textbook
Fieldbus devices require far more attention in their initial setup and commissioning than their analog…
Textbook
Imagine a liquid-level control system for a vessel, where the position of a level-sensing float directly sets…
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Perhaps the most valuable skill an instrument technician can possess is the ability to efficiently diagnose…
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A fluid is any substance having the ability to flow: to freely change shape and move under the influence of a…
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Self-balancing pneumatic instrument mechanisms are very similar to negative-feedback operational amplifier…
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Control valves are supposed to deliver reliable, repeatable control of process fluid flow rate over a wide…
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A hand switch is exactly what the name implies: an electrical switch actuated by a person’s hand motion.…
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In the United States, the ANSI and IEEE organizations have standardized a set of numerical codes referring to…
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Multiple accessories exist for pressure-sensing devices to function optimally in challenging process…
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Abdelaziz, Ahmed (June 2014) Identified numerous typographical errors throughout the book, mostly repeated…
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Perhaps the most important rule of controller tuning is to know the process before attempting to adjust the…
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Valve actuators provide force to move control valve trim. For precise positioning of a control valve, there…
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Sensors used to measure vibration come in three basic types: displacement, velocity, and acceleration.…
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Modern analog-to-digital converters are phenomenally accurate, dependable, repeatable, and surprisingly…
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Much has been written about the benefits of robust PID control. Increased productivity, decreased equipment…
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While 50 and 51 (instantaneous and time overcurrent) relay functions monitor line current magnitude and guard…
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Impedance in a series circuit is the orthogonal sum of resistance and reactance: \[Z = \sqrt{R^2 + (X_L -…
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Feedback obtained from industrial users of FF reveal a common pattern: Fieldbus is a powerful and reliable…
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A special type flowmeter suited for powdered or granular solids is the weighfeeder. One of the most common…
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