E-Book Overview
Tony Fischer-Cripps is a Project Leader in the Division of Telecommunications and Industrial Physics of the CSIRO (Commonwealth Scientific & Industrial Research Organisation), Australia. He was previously lecturer, University of Technology, Sydney (UTS), Australia, and has also worked for the National Institute of Standards and Technology, USA (NIST, formerly National Bureau of Standards - NBS). *The essential pocket reference for engineers and students *Interfacing in action: PCs, PLCs, transducers and instrumentation in one book *Develop systems and applications that work with Newnes Interfacing Companion
E-Book Content
Newnes Interfacing Companion To Robert Winston Cheary, friend and teacher. OXFORD AMSTERDAM BOSTON LONDON NEW YORK PARIS SAN DIEGO SAN FRANCISCO SINGAPORE SYDNEY TOKYO Newnes An imprint of Elsevier Science Linacre House, Jordan Hill, Oxford OX2 8DP 225 Wildwood Avenue, Woburn MA 01801-2041 First published 2002 Copyright 2002, A. C. Fischer-Cripps. All rights reserved The right of A. C. Fischer-Cripps to be identified as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988 No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1T 4LP. Applications for the copyright holder's written permission to reproduce any part of this publication should be addressed to the publisher British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloguing in Publication Data A catalogue record for this book is available from the Library of Congress ISBN 0 750 65720 0 For information on all Newnes publications visit our website at www.newnespress.com Printed and bound in Great Britain Preface ...................................................... ix Part 1: Transducers ................................. 1 1.0 Transducers ................................................. 1.1 Measurement systems ................................. 2 3 1.1.1 Transducers ............................................... 1.1.2 Methods of measurement ........................... 1.1.3 Sensitivity ................................................... 1.1.4 Zero, linearity and span .............................. 1.1.5 Resolution, hysteresis and error ................. 1.1.6 Fourier analysis .......................................... 1.1.7 Dynamic response ...................................... 1.1.8 PID control .................................................. 1.1.9 Accuracy and repeatability ......................... 1.1.10 Mechanical models ................................... 1.1.11 Review questions ..................................... 4 5 6 7 8 9 10 11 12 13 14 1.2 Temperature ................................................ 15 1.2.1 Temperature ............................................... 1.2.2 Standard thermometers .............................. 1.2.3 Industrial thermometers .............................. 1.2.4 Platinum resistance thermometer ............... 1.2.5 Liquid-in-glass thermometer ....................... 1.2.6 Radiation pyrometer ................................... 1.2.7 Thermocouple ............................................ 1.2.8 Thermistors ................................................ 1.2.9 Relative humidity ...............................