In contrast to quantitative tuning procedures where definite numerical values for P, I, and D controller…
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I remember first learning about the world-wide Internet, and wondering what it actually looked like. The first…
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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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This section shows some of the many instrument symbols found in different types of technical diagrams used to…
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It is possible to convey electrical power and communicate analog information over the same two wires using 4…
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In some process applications, it is important that the control valve be able to completely stop fluid flow…
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The following animation shows a rotating phasor in three-dimensional form. The phasor rotates in a complex…
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Atom: the smallest unit of matter that may be isolated by chemical means. Particle: a part of an atom,…
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As discussed at the beginning of this chapter, instrumentation safety may be broadly divided into two…
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DC electric motors generate torque by a reaction between two magnetic fields: one field established by…
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Those familiar with industrial instrumentation will find much within the electric power industry remarkably…
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Although analog electronic process controllers are considered a newer technology than pneumatic process…
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As described earlier in this chapter, calibration refers to the adjustment of an instrument so its output…
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Learning from reading printed text is a kind of problem-solving activity it is own right. The problem is how…
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All masses require force to accelerate (we can also think of this in terms of the mass generating a reaction…
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Mechanical pressure-sensing elements include the bellows, the diaphragm, and the bourdon tube. Each of these…
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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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Converting between disparate units of measurement is the bane of many science students. The problem is worse…
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Using filter cells to eliminate wavelengths associated with interfering gases is called positive filtering in…
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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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