BS EN ISO 11545-2009 Agricultural irrigation equipment - Centre-pivot and moving lateral irrigation machines with sprayer or sprinkler nozzles - Determination of uniformity of wate.pdf

1、BS EN ISO11545:2009ICS 65.060.35NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAgricultural irrigationequipment Centre-pivot and movinglateral irrigationmachines with sprayeror sprinkler nozzles Determination ofuniformity of waterdistribution (ISO11545:2009)Thi

2、s British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 December2009 BSI 2009ISBN 978 0 580 62259 5Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 11545:2009National forewordThis British Standard is the UK implementation of EN ISO 11

3、545:2009.It supersedes BS EN ISO 11545:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AGE/30, Irrigation and drainage equipment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does

4、not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11545 November 2009 ICS 65.060.35 Supersedes EN

5、 ISO 11545:2001English Version Agricultural irrigation equipment - Centre-pivot and moving lateral irrigation machines with sprayer or sprinkler nozzles - Determination of uniformity of water distribution (ISO 11545:2009) Matriel agricole dirrigation - Pivots et rampes frontales quips de buses darro

6、sage ou dasperseurs - Dtermination de luniformit de la distribution deau (ISO 11545:2009) Landwirtschaftliche Bewsserungsausrstung - Kreis- und Linearberegnungsmaschinen mit Dsen oder Regnern - Bestimmung der Gleichfrmigkeit der Wasserverteilung (ISO 11545:2009) This European Standard was approved b

7、y CEN on 21 October 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stan

8、dards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified

9、to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

10、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploita

11、tion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11545:2009: EBS EN ISO 11545:2009EN ISO 11545:2009 (E) 3 Foreword This document (EN ISO 11545:2009) has been prepared by Technical Committee ISO/TC 23 “Tractors and machinery for agriculture and forestry“

12、in collaboration with Technical Committee CEN/TC 334 “Irrigation techniques” the secretariat of which is held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2010, and conflicting na

13、tional standards shall be withdrawn at the latest by May 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersede

14、s EN ISO 11545:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Icel

15、and, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 11545:2009 has been approved by CEN as a EN ISO 11545:2009 without any modification. BS

16、 EN ISO 11545:2009ISO 11545:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Terms and definitions .1 3 Test conditions and equipment .2 3.1 Collectors .2 3.2 Wind3 3.3 Evaporation4 3.4 Elevation.4 4 Test procedures.4 5 Calculations .5 6 Evaluation.6 7 Reporting of test r

17、esults.7 Annex A (normative) Sample data sheets and test report forms for required information 10 Bibliography16 BS EN ISO 11545:2009ISO 11545:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodi

18、es (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations

19、, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the IS

20、O/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the

21、member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11545 was prepared by Technical Committee ISO/TC 23, Tractors and m

22、achinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems. This third edition cancels and replaces the second edition (ISO 11545:2001), which has been technically revised. BS EN ISO 11545:2009INTERNATIONAL STANDARD ISO 11545:2009(E) ISO 2009 All rights

23、reserved 1Agricultural irrigation equipment Centre-pivot and moving lateral irrigation machines with sprayer or sprinkler nozzles Determination of uniformity of water distribution 1 Scope This International Standard specifies an in-field method for determining the uniformity of water distribution in

24、 the field from centre-pivot and moving lateral irrigation machines equipped with sprayer or sprinkler nozzles. The calculation of the coefficient of uniformity is also specified. This International Standard is applicable to agricultural irrigation machines for which the water application device is

25、more than 1,5 m above the soil surface and for which the water distribution from successive devices overlaps. It is not applicable to the evaluation of centre-pivot irrigation machines equipped with various corner arm application devices. 2 Terms and definitions For the purposes of this document, th

26、e following terms and definitions apply. 2.1 centre-pivot irrigation machine automated irrigation machine consisting of a number of self-propelled towers supporting a pipeline rotating around a pivot point and through which water supplied at the pivot point flows radially outward for distribution by

27、 sprayers or sprinklers located along the pipeline 2.2 moving lateral irrigation machine automated irrigation machine consisting of a number of self-propelled towers supporting a pipeline transverse to the direction of travel moving in such a way that the pipeline remains generally in a straight lin

28、e, traversing the field in a straight path, and through which water supplied to the irrigation machine at any point along the pipeline is distributed over a basically rectangular area by sprayers or sprinklers located along the pipeline 2.3 sprinkler water-distribution device of a variety of sizes a

29、nd types EXAMPLE Impact sprinkler, fixed nozzle sprinkler, irrigation gun. 2.4 irrigation sprayer device that discharges water in the form of fine jets or in a fan shape without rotational movement of its parts 2.5 sprinkler package collection of water-distribution devices fitted to the outlets of e

30、ither centre-pivot or moving lateral irrigation machines, either with or without moving components, piping, pressure or flow-control devices and supporting plumbing designed for a specific irrigation machine and set of operating parameters BS EN ISO 11545:2009ISO 11545:2009(E) 2 ISO 2009 All rights

31、reserved2.6 endgun set of one or more sprayers or sprinklers installed on the distal end(s) of a centre-pivot or moving lateral irrigation machine to increase the irrigated area, and usually operating for only a portion of the time to conform to field boundaries 2.7 test pressure pressure of a centr

32、e-pivot or moving lateral irrigation machine measured at the first available outlet downstream from the elbow or the tee at the top of the inlet to the pipeline 2.8 effective radius radius of the circular-field area to be irrigated by a centre-pivot irrigation machine, measured as the distance from

33、the pivot point to the terminal sprayer or sprinkler on the pipeline 2.9 effective length dimension parallel to the pipeline of a moving lateral machine, measured as the distance between the two most distant end sprayers or sprinklers on the pipeline, except where a portion of the area under the pip

34、eline is used for the water supply system and not for crop production, in which case that distance is excluded 2.10 wetted radius rwdistance measured from the centreline of a sprayer or sprinkler to the last collector with measurable water or estimated from the manufacturers catalogue data as half o

35、f the diameter of coverage 2.11 applied depth diadjusted volume of water caught in each collector in an array of collectors plus the average amount of water that evaporates while the water is in the collector, divided by the area of the collector opening 2.12 collector receptacle into which the wate

36、r is deposited during a water distribution test 2.13 client person(s) or organization for which a test is performed 2.14 tester person(s) or organization that conduct(s) a test 3 Test conditions and equipment 3.1 Collectors 3.1.1 All collectors used for a test shall be identical and shaped such that

37、 water does not splash in or out. The lip of the collector shall be symmetric and without depressions. The height of each collector shall be at least twice the maximum depth of the water collected during the test, but not less than 150 mm. It shall have a circular opening with sharp edges free from

38、deformities. The diameter shall be at least half the height, but shall not be less than 85 mm. To minimize measurement error, it is recommended that testers use collectors that are as large as practicable. BS EN ISO 11545:2009ISO 11545:2009(E) ISO 2009 All rights reserved 33.1.2 Place the collectors

39、 uniformly along two or more straight lines perpendicular to the direction of travel of the machine. The maximum collector spacing within each line shall be in accordance with Table 1. Collectors shall not be located where the sprayer or sprinkler pattern is affected by the tower structural componen

40、ts. Table 1 Maximum spacing for collectors Sprayer or sprinkler wetted radiusm Maximum collector spacing m 10 3 W 10 5 To minimize systematic errors, collectors of adjacent lines should be offset. The offset should be 1/nth the collector spacing, where n is the number of collector lines (see Figures

41、 1 and 2 for collector layout detail). Ensure that the distance between the collectors is not a multiple of the distance between the sprayers or sprinklers. Collectors should be moved to avoid wheel tracks. Record the location of the collectors. 3.1.3 Place the lines of the collectors so that the di

42、stance between the lines is as follows. For centre-pivot irrigation machines, locate the collectors along two or more lines extending radially from the pivot point. Ensure that the distance between distal ends of the radial lines is no more than 50 m. Record the spacing pattern (see Figure 1). For m

43、oving lateral irrigation machines, locate the collectors along two or more lines parallel to the pipeline. Ensure that the lines of the collectors extend across the effective length of the machine and are not more than 50 m apart. Record the spacing pattern (see Figure 2). 3.1.4 Locate the collector

44、s so that obstructions, such as the crop canopy, do not interfere with the measurement of water application. When an obstruction is higher than the elevation of the collector, but below the water-distribution device height, maintain a horizontal unobstructed distance of at least twice the height of

45、the obstruction on both sides of the collector rows (see Figure 3, case A). For systems with water-distribution devices that operate below the crop canopy height, maintain a horizontal unobstructed distance of at least 1,25 times the wetted radius of the sprayer or sprinkler on each side of the coll

46、ector rows (see Figure 3, case B). 3.1.5 The entrance portion of the collectors shall be level. When wind velocities during the test are expected to exceed 2 m/s, the entrance of the collectors should be no more than 0,3 m above ground or crop canopy. The discharge height of the sprayer or sprinkler

47、 shall be at least 1 m above the top of the collector. Record the height of the sprayer or sprinkler nozzles and the entrance to the collectors. 3.2 Wind 3.2.1 Measure the wind velocity during the test period with a rotating anemometer or equivalent device. 3.2.2 Determine the wind direction, relati

48、ve to the line of collectors, with a vane indicating at least eight points of the compass. 3.2.3 Locate the equipment for measuring wind velocity at a height of 2 m and within 200 m of the test site, in a location representative of the wind conditions at the test site. 3.2.4 Ensure that the anemomet

49、er has a threshold velocity not exceeding 0,3 m/s and is capable of measuring the actual velocity to within 10 %. 3.2.5 The accuracy of the test procedure begins to decrease when the wind velocity exceeds 1 m/s. The test should not be used as a valid measure of the uniformity or performance of a sprinkler package if the wind velocity exceeds 5 m/s. To test at wind velocities greater than 5 m/s, the client and tester should understand BS EN ISO 11545:2009ISO 11545:2009(E) 4 ISO 2009 All rights reservedthe limitations of the test resu