To better understand the design and operation of self-balancing pneumatic mechanisms, it is helpful to examine…
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An electric motor is often used as a discrete control element in a control system if driving a pump, conveyor…
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In addition to directly performing logic functions, electromechanical relays may also be used as interposing…
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Learning is not merely a process of information transfer. It is first and foremost a transformation of…
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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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A completely different way of measuring liquid level in vessels is to bounce a traveling wave off the surface…
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An important legacy technology for all kinds of continuous measurement is the self-balancing system. A…
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Many liquid substances undergo a process whereby their constituent molecules split into positively and…
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Although analog electronic process controllers are considered a newer technology than pneumatic process…
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A bridge circuit is basically a pair of voltage dividers where the circuit output is taken as the difference…
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A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
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Much has been written about the benefits of robust PID control. Increased productivity, decreased equipment…
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Given the ability of pressurized fluids to transmit force over long distances, it is not surprising that many…
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To understand just how different FOUNDATION Fieldbus is from other digital instrument systems, consider a…
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Nearly every technical course teaches and tests students on definitions, basic concepts, and at least some…
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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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Layer 1 of the OSI Reference Model is where we define the “physical” elements of a digital data…
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An exciting development in industrial instrumentation is the WirelessHART radio communication standard,…
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Circuit breakers used in residential, commercial, and light industrial service are self-tripping devices: they…
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In contrast to quantitative tuning procedures where definite numerical values for P, I, and D controller…
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