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Principles of Measurement Systems
We work with leading authors to develop the strongest educational materials in engineering, bringing cutting-edge thinking and best learning practice to a global market. Under a range of well-known imprints, including Prentice Hall, we craft high quality print and electronic publications which help readers to understand and apply their content, whether studying or at work. To find out more about the complete range of our publishing, please visit us on the World Wide Web at: www.pearsoned.co.uk
Principles of Measurement Systems
Fourth Edition
John P. Bentley Emeritus Professor of Measurement Systems University of Teesside
Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Visit us on the World Wide Web at: www.pearsoned.co.uk First published 1983 Second Edition 1988 Third Edition 1995 Fourth Edition published 2005 © Pearson Education Limited 1983, 2005 The right of John P. Bentley to be identified as author of this work has been asserted by him in accordance w th the Copyright, Designs and Patents Act 1988. All rights reserved. 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 either the prior written permission of the publisher or a licence permitting restricted copying in the United Kingdom issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP. ISBN 0 130 43028 5 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data Bentley, John P., 1943– Principles of measurement systems / John P. Bentley. – 4th ed. p. cm. Includes bibliographical references and index. ISBN 0-13-043028-5 1. Physical instruments. 2. Physical measurements. 3. Engineering instruments. 4. Automatic
We work with leading authors to develop the strongest educational materials in engineering, bringing cutting-edge thinking and best learning practice to a global market. Under a range of well-known imprints, including Prentice Hall, we craft high quality print and electronic publications which help readers to understand and apply their content, whether studying or at work. To find out more about the complete range of our publishing, please visit us on the World Wide Web at: www.pearsoned.co.uk
Principles of Measurement Systems
Fourth Edition
John P. Bentley Emeritus Professor of Measurement Systems University of Teesside
Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Visit us on the World Wide Web at: www.pearsoned.co.uk First published 1983 Second Edition 1988 Third Edition 1995 Fourth Edition published 2005 © Pearson Education Limited 1983, 2005 The right of John P. Bentley to be identified as author of this work has been asserted by him in accordance w th the Copyright, Designs and Patents Act 1988. All rights reserved. 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 either the prior written permission of the publisher or a licence permitting restricted copying in the United Kingdom issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP. ISBN 0 130 43028 5 British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data Bentley, John P., 1943– Principles of measurement systems / John P. Bentley. – 4th ed. p. cm. Includes bibliographical references and index. ISBN 0-13-043028-5 1. Physical instruments. 2. Physical measurements. 3. Engineering instruments. 4. Automatic