ISA 5.1-2009 Instrumentation Symbols and Identification

This preface is included for information purposes and is not part of ANSI/ISA-5.1-2009. 

This standard has been prepared as part of the service of ISA, The International Society of Automation, toward the goal of uniformity in the field of industrial automation.  To be of continuing value, this standard should not be static but should be subject to periodic review.  ISA welcomes all comments and suggestions and asks that they be addressed to the Secretary, Standards and Practices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC  27709; Telephone: (919) 549-8411; Fax: (919) 549-8288, e-mail: standards@isa.org. 

The ISA Standards and Practices Department is aware of the growing need for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards.  The Department will endeavor to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible.  Standard for Use of the International System of Units (SI): The Modern Metric System, published by the American Society for Testing & Materials as IEEE/ASTM SI 10-97, and future revisions, will be the reference guide for definitions, symbols, abbreviations, and conversion factors. 

It is the policy of ISA to encourage and welcome the participation of all concerned individuals and interests in the development of ISA standards, recommended practices, and technical reports.  Participation in the ISA standards-making process by an individual in no way constitutes endorsement by the employer of that individual, of ISA, or of any of the standards, recommended practices, and technical reports that ISA develops. 

ISA 5.1-2009 Instrumentation Symbols and Identification : Download