A fundamental principle in instrumentation system troubleshooting is that every instrument has at least one…
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Shown here is a partial listing of principles applied in the subject matter of this chapter, given for the…
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Although it seems each model of PLC has its own idiosyncratic standard for programming, there does exist an…
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A simple control system drawn in block diagram form looks like this: Information from the measuring device…
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As we have seen, the concept of differentiation is finding the rate-of-change of one variable compared to…
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Imagine a major marathon race, where hundreds of runners gather in one place to compete. When the starting gun…
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Any power grid large enough to meet the demand of an entire nation must have multiple generators drawing from…
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A fundamental limitation of proportional control has to do with its response to changes in setpoint and…
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A powerful mathematical concept useful for analyzing practically any physical system – electrical…
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In addition to directly performing logic functions, electromechanical relays may also be used as interposing…
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It is often useful to express the amplitude of an alternating quantity such as voltage or current in terms…
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Current is the name we give to the motion of electric charges from a point of high potential to a point of low…
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Stoichiometry is the accounting of atoms before and after a chemical reaction. It is an expression of the Law…
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So far we have just looked at instruments that sense, control, and influence process variables. Transmitters,…
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Nearly every technical course teaches and tests students on definitions, basic concepts, and at least some…
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The three “elementary” particles of matter comprising all atoms are electrons, protons, and…
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Diagnostic ability is arguably the most difficult skill to develop within a student, and also the most…
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All substances are comprised of various elements in various combinations and proportions. Elements may thus be…
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Programmable logic controllers are essentially nothing more than special-purpose, industrial computers. As…
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Several different technologies exist for the conversion of fluid pressure into an electrical signal response.…
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