Specification Forms for Process Measurement and Control ...

Specification Forms forProcess Measurement andControl Instruments, PrimaryElements, and Control ValvesApproved 30 October 1981 ISA 20 1981 FormerlyISA S20 1981 STANDARDISA The Instrumentation,Systems, andAutomation Society TMCopyright 1981 by the Instrument Society of America. All rights reserved. Printed in the UnitedStates of America. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form or by any means (electronic, mechanical, photocopying, recording, orotherwise), without the prior written permission of the Alexander Box 12277 Research Triangle Park, North Carolina 27709 ISA-20-1981, Specification Forms for Process Measurement and Control Instruments, Primary Elements and Control ValvesISBN 0-87664-347-0 ISA-S20-19813 PrefaceThis Preface is included for information purposes and is not part of Standard has been prepared as a part of the service of the ISA t

12) If standard auto-manual switching is not known or not adequate, specify particular requirements, such as BUMPLESS, PROCEDURELESS, 4-POSITION, or as required. 13) Remote set point adjustment assumes full adjustment range. Specify limits if req uired. Under other can be noted bias or ratio. 14) Specify if applicable. 15) Specify if applicable.

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