Much has been written about the benefits of robust PID control. Increased productivity, decreased equipment…
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The simplest form of 4-20 mA current loop is the type used to represent the output of a process controller,…
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In order for any PID controller to be practical, it must be able to do more than just implement the PID…
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In this section I will show screenshots from a process loop simulation program illustrating the effectiveness…
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An electromechanical relay is an electrical switch actuated by an electromagnet coil. As switching devices,…
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Non-dispersive analysis, while newer in discovery than dispersive analysis (Isaac Newton’s 17th-century…
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Creative Commons Attribution 4.0 International Public License By exercising the Licensed Rights (defined…
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Self-balancing mechanisms consisting solely of a baffle/nozzle detector coupled to a feedback bellows, while…
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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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(Will be addressed in future versions of this book)
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As we have seen, the concept of integration is finding the accumulation of one variable multiplied by another…
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PID control can be a confusing concept to understand. Here, a brief summary of each term within PID (P. I, and…
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A great many chemical composition measurements may be made indirectly by means of electricity, if those…
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Many liquid substances undergo a process whereby their constituent molecules split into positively and…
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A completely different way of measuring liquid level in vessels is to bounce a traveling wave off the surface…
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DC electric current signals may also be used to communicate process measurement information from transmitters…
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Sometimes we encounter a diversity of instrument signal standards in one control system. Such is the case with…
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Imagine a liquid-level control system for a vessel, where the position of a level-sensing float sets the…
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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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Mechanical pressure-sensing elements include the bellows, the diaphragm, and the bourdon tube. Each of these…
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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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A different strategy for controlling the flow of fluid is to insert a rotary element into the flow path.…
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A Safety Instrumented Function, or SIF, is one or more components designed to execute a specific…
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Area refers to the size of two-dimensional surface. Volume refers to the size of a three-dimensional space. To…
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