Perhaps the most valuable skill an instrument technician can possess is the ability to efficiently diagnose…
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Negative feedback systems, in general, tend to cause confusion for those first learning their fundamental…
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Perhaps the simplest form of solid or liquid level measurement is with a float: a device that rides on the…
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A quantitative PID tuning procedure is a step-by-step approach leading directly to a set of numerical values…
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Mechanical pressure-sensing elements include the bellows, the diaphragm, and the bourdon tube. Each of these…
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Human-machine interfaces, or HMIs, are a critical part of nearly all control systems, complementing the…
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A temperature switch is one detecting the temperature of some substance. Temperature switches often use…
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Electrical Resistance Resistance (\(R\)) is the dissipative opposition to an electric current, analogous to…
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The efficient identification and correction of instrument calibration errors is an important function for…
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Electromechanical relays may be connected together to perform logic and control functions, acting as logic…
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One of the most common, and most useful, pressure measuring instruments in industry is the differential…
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Those familiar with industrial instrumentation will find much within the electric power industry remarkably…
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The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve…
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At the root of successful system diagnosis is a rigorous adherence to scientific reasoning. There exists no…
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The following photograph shows a large air blower in a wastewater treatment facility equipped with a…
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This section does not describe a particular type of flowmeter, but rather a design that may be implemented for…
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Self-balancing pneumatic instrument mechanisms are very similar to negative-feedback operational amplifier…
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Solids tend to expand when heated. The amount that a solid sample will expand with increased temperature…
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Circuit breakers used in residential, commercial, and light industrial service are self-tripping devices: they…
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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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