Glossary Archive | Tek-Trol

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Impedance

Impedance: The opposition in an electric circuit to the flow of an alternating current consisting of inductive reactance, ohmic resistance, and capacitive reactance. Inaccuracy: Maximum positive and negative deviation from the specified characteristic curve observed in testing a device under specified conditions and by a specified procedure. [IEC 61298-2] Note 1: Accuracy is defined in IEC 60050-300, definition 311-06-08. Note 2: The term inaccuracy is sometimes referred to as measured accuracy. This term should not be used.

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Instrumentation

Electronic or electromechanical devices often referred to as meters, used to measure the flow, level, temperature, and pressure of processes in different industrial applications. They monitor processes in power generation, manufacturing and refining plants. Information collected by various instruments is processed by analyzers and used to assess performance, sending alerts if readings are not as expected.

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Insulator

A material that does not conduct electric currents, such as plastic, some kinds of silicon or glass. The term can also refer to a material that does not conduct heat. For clarity, the terms thermal insulator and the electrical insulator may be used.

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ISO 9000

International standards for quality assurance set by the International Standards Organization. It includes some 20 elements of quality process performance and is a prerequisite for delivering predictable, quality products to customers.

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