ISO INTERNATIONAL STANDARD 15886-3 Third edition 2021-03 Agricultural irrigation equipment - Sprinklers - Part 3: Characterization of distribution and test methods Materielagricoled'irrigation-Asperseurs Partie3:Caractérisationdela distribution et methodes d'essai Reference number ISO 15886-3:2021(E) ISO @ IS0 2021 Copyright International Organization for Standardizatior IS0 15886-3:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 0111 Email: [email protected] Website:www.iso.org Published in Switzerland Copyright hmalbganderdzan @ IS0 2021 - All rights reserved IS015886-3:2021(E) Contents Page Foreword iv Scope 1 2 Normative references. .1 3 Terms and definitions .1 4 Collectors 4 4.1 Collector design 4 4.2 Collectororientation 4 5 Installation of sprinklersundertest 5 6 Measurements. 6. 6.1 Accuracy ofmeasurements 6 6.2 Pressuremeasurement. 6.3 Atmosphericconditionsmeasurements 8 6.4 Correctionsforevaporativelosseswithincollectors 7 Collector arrangement, spacing and number 8 7.1 Full grid collector array method 8 7.1.1 Method. 8 7.1.2 Collector spacing.. 8 7.1.3 Sprinkler location relative to grid 8 7.2 Radial collector arraymethod 7.2.1 Method. 9 7.2.2 Collector spacing. 9 7.2.3 Location of sprinkler 9 7.2.4 9 Radius of throw 8 Additionaltests 9 8.1 Time of rotation .9 8.2 Trajectory height. .9 9 Test operation 9 Rotation of sprinkler riser .9 9.1 9.2 Test duration. 10 9.3 Other test details .10 10 Testlocation specifications .10 10.1 Indoor testing building specifications 10 10.2 Outdoor site specification. 11 10.2.1 General. 11 10.2.2 Measurementofatmosphericconditions .11 11 Characterization of distribution .11 11.1 Overview 11 11.2 Applicationpattern coverage and uniformity 11 11.3 Generatingperformancemeasurementsfromradialarrays 12 11.4 Validation oftest results 12 12 Radiusofthrowandwaterdistributioncurve .12 12.1 General 12 12.2 Radius ofthrow. 13 12.3 Distribution curve 13 12.4 Uniformity ofrotation (for rotating sprinklers intendedto rotate in a uniform manner).14 Annex A (informative) Procedures forthe characterization of sprinkler pattern uniformity. .15 Annex B (informative) Testing ofpart-circle sprinklers .19 Bibliography .21 ii