ISO INTERNATIONAL STANDARD 9555-3 First edition 1992-11-01 Measurement of liquid flow in open channels Tracer dilution methods for the measurement of steady flow -- Part 3: Chemical tracers Mesure de debit des liquides dans les canaux decouverts --- Methodes de dilution en regime permanent utilisant des traceurs -- Partie 3: Traceurs chimiques Reference number ISO 9555-3:1992(E) Copyright International Organization for Standardization Not for Resale ISO 9555-3:1992(E) Contents Page 1 Scope Normative reference 2 Delinitions and symbols 3 3.1 Definitions 2 2 3.2 Symbols 3.3 Units of measurement 4 Tracers used 4.1 General 2 4.2 lodide 2 4.3 Lithium 4.4 Chloride 4.5 Chromium Tracer measurement 5 5.1 Principles 3 5.2 Field measurement 5.3 Laboratory measurement Environmental factors affecting tracers 6.1 Chemical factors 6.2 8 Physical factors 6.3 Biological factors 9 7 Techniques for tracer injection 8 Sampling techniques 9 9 Analysis and sources of error 9 10 Special requirements 10.1 lodide C ISO1992 or by any means, electronic or mechanical, inciuding photocopying and microfilm, without permission in writing from the pubisher. International Organizationfor Standardization Case Postale 56 CH-1211 Geneve 20·Switzerland Printed in Switzerland ii Copyright InternationalOrganization for Standardization se from IHS Not for Resale ISO 9555-3:1992(E) 10.2 Lithium 10 10.3 Chloride 10 10.4 Chromium 10 Annex A General characteristics of commonly used chemical tracers 11 !!! Copyright International Organization for Standardization Not for Resale