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Published on Aug 8, Normas ISA para la instrumentacion industrial. SlideShare Explore Search You. Submit Search. Successfully reported this slideshow.
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No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording, or otherwise , without the prior written permission of the Publisher. 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. 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. 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.
Users of this standard are asked to send comments or suggestions to standards isa. Brett Honeywell Inc. Coppler Ametek Inc. Dumortier Schneider Electric D.
Dunn Aramco Services Co. Dunn DuPont Engineering J. Kaufman Honeywell K. Maggioli Feltronics Corp. McAvinew Jacobs Engineering G. McFarland Emerson Process Mgmt.
Reimer Rockwell Automation N. Sasajima Yamatake Corp. Schnaare Rosemount Inc. Weidman Worley Parsons J. Widmeyer Consultant M. This page intentionally left blank. Communication presupposes and is facilitated by a common language. This version of the standard continues to build on the foundation for that common language. As such, they had many of the strengths and the weaknesses of such standards. Their primary strength was that they could be used in widespread, interdisciplinary ways.
Their main weakness was that they were not specific enough, in some cases, to satisfy the special requirements of particular interest groups. This group was well versed in the use of identification and symbol systems as a means of communicating the intent of measurement and control systems to all that need such information.
It is hoped that the consensus reached by this group regarding what is mandatory and what is not will enhance the strengths and lessen the weaknesses of the previous issues. The meanings and definitions of new symbols will be mandatory. This action is being taken in response to questions and comments that occur frequently because of unclear definitions.
Mandatory minimum symbol dimensions are given. Informative identification and graphic symbol guidelines include alternate identification and symbol definitions and usage methods. Consistency is the one criterion that should govern the selection and application of identification and graphic schemes.
This perception, while not intended, resulted from the fact that people who wrote the original and previous revisions were mainly working in those industries. It is hoped that the technical report format will be specific enough to satisfy the special requirements of particular interest groups by providing examples and guidelines for use of the identification and symbolization methods for specific industries.
These industries include, but are not limited to, metal refining, power generation, pulp and paper, and discrete parts manufacturing. It also adds definitions for new symbols required for functional diagramming of instruments and simple electrical circuit diagrams. Clauses 1, 2, and 3 are essentially the same as previously written with some additions and modifications.
Clauses 4, 5 and 6 and informative Annexes A and B are new or extensively revised. The same functions are performed by personal computers PC and by fieldbus and devicebus devices. Users who continue to use the symbols as in the past should change to the revised meanings as soon as possible.
This revision adds the SAMA symbols and descriptions for logic function enclosures for use in functional diagrams, logic diagrams, and application software functions. If their use is desired within the batch processing industries, an ISA Technical Report could be produced to cover this unique need. It is hoped that ISA Technical Reports will be prepared based on this standard to cover the application of identification and symbolization methods and practices in the detail required by users in those many industries beyond the process industries, who depend on this standard in their daily work.
The key elements of ISA Guidelines for the application of the binary system can be found in Annex B Informative , Graphic symbol system guidelines.
These differences are recognized when they are consistent with the objectives of this standard, by providing alternative symbol and identification methods. These industries and others require the use of control system schematics, functional diagrams, and electrical schematics to describe the relationship to processing equipment and the functionality of measurement and control equipment.
For example, a differential pressure transmitter is not identified as a differential pressure transmitter but as a: a Flow transmitter when connected to an orifice plate when measuring flow. For additional information, see ISA See also monitor light. The type of analyzer, and for stream component analyzers the components of interest, shall be defined outside the tagging bubble.
For example, [XR-2] may be a stress recorder and [XX-4] may be a stress oscilloscope. Pressure safety valve [PSV] and temperature safety valve [TSV] apply to valves intended to protect against emergency pressure and temperature conditions. This applies regardless of whether the valve construction or mode of operation places it in the category of safety valve, relief valve, or safety relief valve.
Such uses shall be fully detailed by sketches or notes on the drawing legend and detail sheets. Table 5. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. Now customize the name of a clipboard to store your clips. Visibility Others can see my Clipboard. Cancel Save.
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