There is much to be said for neatness of assembly in electrical signal wiring. Even though the electrons…
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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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There are many process control applications in the industry where it is desirable to have multiple control…
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There are several different methods useful for causing an AC induction motor to brake, or slow down: DC…
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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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As previously defined, calibration refers to the checking and adjustment of an instrument so that its output…
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Circuit breakers used in residential, commercial, and light industrial service are self-tripping devices: they…
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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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Constructing PID control systems using discrete components is a fairly simple method involving operational…
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To review, voltage is the measure of potential energy available to electric charges. Current is the uniform…
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Disturbances in the liquid tend to complicate liquid level measurement. These disturbances may result from…
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Tube, like pipe, is a hollow structure designed to provide an enclosed pathway for fluids to flow. In the case…
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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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Every programmable logic controller must have some means of receiving and interpreting signals from real-world…
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Like so many other industrial data networks, FOUNDATION Fieldbus is an “unswitched” or…
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Self-balancing mechanisms consisting solely of a baffle/nozzle detector coupled to a feedback bellows, while…
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Volumes could be written about poor diagnostic technique. The following mistakes are not intended to comprise…
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Self-balancing pneumatic instrument mechanisms are very similar to negative-feedback operational amplifier…
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AC induction motors are based on the principle of a rotating magnetic field produced by a set of stationary…
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One of the simplest classes of temperature sensor is one where temperature effects a change in electrical…
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