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ANSI/ISA S51.1-1979 (R1993)
Process Instrumentation Terminology
As of 8 March 2024, the ISA Standards & Practices Board has removed this document from active status, and the document is no longer being reviewed or assessed for accuracy, for relevance to current practices, or for further applications. However, some users may find that this document continues to provide valid and useful content for their specific needs.
The International Society of Automation [isa]
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