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		Control and Instrumentation Glossary Search for another term in our Glossary        ISO 9001 A quality assurance standard issued by the International Organization for Standards. Standard is titled; Quality systems - Model for quality assurance in design/development, production, installation and servicing. Further Reading   I/O - Input Output Term used for signals entering (Inputs) and exiting (Outputs) a control system Further Reading   ID Internal Diameter Further Reading   IEC International Electrotechnical Commission Body composed of 60 plus countries that issues standards for all electrical electronic and related technology Further Reading   IEEE Institute of Electrical and Electronics Engineers US based non profit technical professional association Further Reading   Impedance Opposition to the flow of ac current; the equivalent of resistance in dc circuits. Expressed in units called ohms. The impedance of an ac circuit is one ohm if a potential difference of one volt creates a current flow of one ampere within it. Further Reading   Incoloy A nickel-chromium alloy. Noted for good strength and excellent resistance to oxidation and carburisation in high-temperature atmospheres. Further Reading   Inconel A nickel-chromium-iron alloy. Noted for having high temperature strength while maintaining excellent corrosion resistance. Further Reading   Inductance The property by which an electromotive force (emf) is induced in a conductor when the magnetic field is changing about it. This is usually caused by changes in the current flow in the circuit or in a neighboring circuit. Further Reading   INERIS French based Notified Body Further Reading   IP Ingress Protection Further Reading Guide to IP Ratings   IS Intrinsic Safety Method of explosion prevention by limiting the energy stored in electrical circuits Further Reading   ISSeP Notified Body based in Belgium Further Reading   IST Integrated Systems Test Further Reading   IVB Independent Verification Body Further Reading		Sponsored Links
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