“Radio” systems use electromagnetic fields to communicate information over long distances through…
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The concepts of calibration (trimming) and ranging are often difficult for new students of instrumentation to…
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These fortifications focus on human behavior rather than system design or component selection. In some ways…
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Fluid pressure exerts force on any surface area it contacts, as described by the formula \(F = PA\). One…
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In the United States, the most common language used to program PLCs is Ladder Diagram (LD), also known as…
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The advent of “smart” field instruments containing microprocessors has been a great advance for…
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This section does not describe a particular type of flowmeter, but rather a design that may be implemented for…
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The three “elementary” particles of matter comprising all atoms are electrons, protons, and…
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Constructing PID control systems using discrete components is a fairly simple method involving operational…
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To understand just how different FOUNDATION Fieldbus is from other digital instrument systems, consider a…
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An important design parameter of a control valve is the position it will “fail” to if it loses…
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A flow switch is one detecting the flow of some fluid through a pipe. Flow switches often use…
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A great many precision instruments use the principle of balance to measure some quantity. Perhaps the simplest…
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All substances are comprised of various elements in various combinations and proportions. Elements may thus be…
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While 50 and 51 (instantaneous and time overcurrent) relay functions monitor line current magnitude and guard…
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Classical mechanics (often called Newtonian mechanics in honor of Isaac Newton) deal with forces and motions…
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Data-processing modules within FF systems are known as function blocks. Sometimes these blocks serve merely to…
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Certain types of nuclear radiation easily penetrates the walls of industrial vessels, but is attenuated by…
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The Law of Continuity for fluids states that the product of mass density (\(\rho\)), cross-sectional pipe area…
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Visualizing the actions of P, I, and D tuning parameters using graphs is extremely useful in predicting the…
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Finally, we arrive at the loop diagram (sometimes called a loop sheet) for the compressor surge control system…
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