Any physical location in an industrial facility harboring the potential of explosion due to the presence of…
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Control valves are supposed to deliver reliable, repeatable control of process fluid flow rate over a wide…
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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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Any conductor possesses a characteristic called inductance: the ability to store energy in the form of a…
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A unique form of technical diagram for describing the abstract functions comprising a control system (e.g. PID…
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An important design parameter of a control valve is the position it will “fail” to if it loses…
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A flow switch is one that detects the flow of some fluid through a pipe. Flow switches often use…
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The digital multimeter (DMM) is quite possibly the most useful tool in the instrument technician’s…
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Some of the simplest types of digital communication networks found in industry are defined by the EIA…
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An exciting development in industrial instrumentation is the WirelessHART radio communication standard,…
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pH is the measurement of the hydrogen ion activity in a liquid solution. It is one of the most common forms of…
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(Will be addressed in future versions of this book)
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As defined previously, calibration means the comparison and adjustment (if necessary) of an instrument’s…
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Many years ago, when I was first learning about electricity, I happened to discover a length of coaxial…
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Regulating the electric power sent to an electric motor is a task performed by high-speed switching…
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In our first signal characterization example, we tackle the problem of measuring fluid flow through a pipe. To…
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A very simple device used to measure pressure is the manometer: a fluid-filled tube where an applied gas…
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Imagine a liquid-level control system for a vessel, where the position of a level-sensing float directly sets…
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Much of our knowledge about atomic structure comes from experimental data relating the interaction between…
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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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