1、BRITISH STANDARD BS EN 12484-5:2002 Irrigation techniques Automatic turf irrigation systems Part 5: Testing methods of systems The European Standard EN 12484-5:2002 has the status of a British Standard ICS 65.060.35 BS EN 12484-5:2002 This British Standard, having been prepared under the direction o
2、f the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 10 October 2002 BSI 10 October 2002 ISBN 0 580 40565 6 National foreword This British Standard is the official English language version of EN 12484-5:2002. The
3、UK participation in its preparation was entrusted to Technical Committee AGE/30, Irrigation and drainage equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which impleme
4、nt international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does
5、not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European
6、committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2
7、 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN124845 September2002 ICS65.060.35 Englishversion IrrigationtechniquesAutom
8、aticturfirrigationsystemsPart5: Testingmethodsofsystems TechniquesdirrigationInstallationsavecarrosage automatiqueintgrdesespacesvertsPartie5: Mthodesdessaidesinstallations BewsserungsverfahrenAutomatische RasenbewsserungssystemeTeil5:Prfverfahren ThisEuropeanStandardwasapprovedbyCENon1August2002. C
9、ENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCEN
10、member. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,
11、Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050
12、Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN124845:2002EEN124845:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Inspectionandtestingforcommissioning .4 5 Presentationoftestresults .9E
13、N124845:2002(E) 3 Foreword ThisdocumentEN124845:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC334“Irrigationtechniques“, thesecretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyMarch2003,andconf
14、lictingnationalstandardsshallbewithdrawnatthelatestby March2003. WithinitsprogrammeofworkCEN/TC334“Irrigationtechniques”chargedCEN/TC334/WG4“Automaticturf irrigationsystems“topreparethefollowingstandard: EN 124845, IrrigationtechniquesAutomaticturfirrigationsystemsPart5:Testingmethodsofsystems. Theo
15、therpartsofthisstandardare: EN 124841, IrrigationtechniquesAutomaticturfirrigationsystemsPart1:Definitionoftheprogrammeof equipmentbytheowner. EN 124842, IrrigationtechniquesAutomaticturfirrigationsystemsPart2:Designanddefinitionoftypical technicaltemplates. EN 124843, IrrigationtechniquesAutomatict
16、urfirrigationsystemsPart3:Automaticcontrolandsystem management. EN 124844, IrrigationtechniquesAutomaticturfirrigationsystemsPart4:Installationandacceptance. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:
17、Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN124845:2002(E) 4 1Scope ThisEuropeanStandardspecifiesamethodforevaluatingtheperformanceofanautomaticturfirrigationsys
18、tem regardingtheuniformityofwaterdistributioninordertocommissionthesystem. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedre
19、ferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences,thelatesteditionofthe publicationreferredtoapplies(includingamendments). EN124841,IrrigationtechniquesAutomaticturfirrigationsystemsPart1:D
20、efinitionoftheprogrammeof equipmentbytheowner. EN124842,IrrigationtechniquesAutomaticturfirrigationsystemsPart2:Designanddefinitionoftypical technicaltemplates. EN124843,IrrigationtechniquesAutomaticturfirrigationsystemsPart3:Automaticcontrolandsystem management. EN124844:2002 ,IrrigationtechniquesA
21、utomaticturfirrigationsystemsPart4:Installationandacceptance. ISO77491:1995,AgriculturalirrigationequipmentRotatingsprinklersPart1:Designandoperational requirements. ISO77492:1990, IrrigationequipmentRotatingsprinklersPart2:Uniformityofdistributionandtestmethods . 3 Termsanddefinitions Forthepurpose
22、ofthisEuropeanStandard,thetermsand definitionsofEN124841to4togetherwiththerelevant unitsapply. 4 Inspectionandtestingforcommissioning 4.1Hydraulic Measurements Theacceptablemeasurementdeviceerrorshallbe:pressure2%,flow3%. Aftertheconformitycontrolaccordingtoclause4ofEN124844:2002,carryoutthefollowin
23、gmeasurements: 4.1.1 Measurementsatthesysteminlet Pressureshallbeinaccordancewiththedesignpressureoftheprojecttowithin 5%. Totalflowshallbeequaltotheflowaccordingtothedesignflowoftheprojecttowithin 5%. 4.2 Waterdistributionuniformitymeasurements Thepurposeofthewaterdistributionuniformitytests,perfor
24、medaccordingtoISO77492,istoverifythe performanceofthesystemaccordingtothedesignoftheproject.EN124845:2002(E) 5 4.2.1 Pressuremeasurementsatsprinklers Tapconnectionupstreamofthesprinklershallcomplywith4.1.5ofISO77492:1990. Onastation,pressure measurementsshallbemadewiththesamepressuregaugeatthemostpr
25、essurizedandlesspressurizedsprinkler pressurevariationbetweenthesetwosprinklersshallnotbegreaterthan20%.Thepressuremeasuredattheless pressurizedsprinklershallbeequaltothedesignpressureoftheproject.Thepressuremeasuredatthemost pressurizedsprinklershallbewithinthelimitofworkingpressurespecifiedbythema
26、nufacturer. 4.2.2 Characteristicsoftheareawherethemeasurementswillbemade Theareashallcorrespondtothespacingofthesprinklersdefinedinthedesign. Forasinglestation,atleasttwotestareas,representativeofthemostandlesspressurizedsprinklerzones,shall bemeasured. Thesurfaceareaonwhichthecollectorsareplacedsha
27、llbefreeofobstaclesthatcouldblockthespraytrajectory. Theheightofthevegetativecovershallnotexceed10cmto15cmsoasnottointerferewithspraydropletaccess tocollectors. 4.2.3 Characteristicsof collectors Thecollectorsshallbe: cylindrical,overatleastthetopthirdoftheirheight; oftheidenticalsizeandshape; withs
28、harpedgesonthecollectingsurface; constructedsothatnoneofthewatercollectedsplashesout. Theheightofthecollectorsshallbeatleasttwicetheaveragedepthofthewatercollectedduringthetestandnot lessthan15cm. Thediameterofthecollectoropeningshallbeequaltooneandahalftimesitsheightandnotlessthan8,5cm. Othercollec
29、tordesignsmaybeused,providedthattheirmeasuringaccuracyisnotlessthanthatdescribedabove. Theopeningsofall thecollectorsshallbehorizontal,withaverticalangletoleranceof5. 4.2.4 Characteristicsofatmospheric conditions ThemaximumpermissiblewindvelocityduringthetestisdefinedinISO77491:1995Table3. Velocitys
30、hallberecordedtothenearest0,2m/sanddirectionstothenearest10.Thedirectionshallbenotedwith respecttothemainaxisofthecollectorgridlayout. Windvelocitysensingequipmentshallbelocatedat2,0mheight. Asecondmeasurementcanbemadeatahigher heightforsprinklerswithatrajectoryheightofmorethan2,0m.Thesensorheightsh
31、allbeequaltothehighest pointinthetrajectoryofthesprinklermainnozzle 10% . Windvelocitymeasurementshallbecarriedoutatadistancenotgreaterthan45mawayfromthemeasurement area.Themaximumpermissiblewindvelocityis0,9m/s. Atthebeginningofthedistributionuniformitytestandduringthetest,thewindvelocityanddirecti
32、onshallbe measuredatintervalsnotexceeding15min. Therelativehumidityandambienttemperatureshallbe measuredatthebeginningandattheendofthetest.EN124845:2002(E) 6 4.2.5 Pressuremeasurement Thepressure,atthestationentry, shallbeadjustedtothedesignpressure. Thepressureshallbemeasuredatthesprinklerinletandk
33、eptconstantoverthedurationofthetestwitha deviationof4%. 4.2.6 Durationoftests Careshallbetakeninstartingandstoppingteststoavoiddirectdepositionincollectorsbyunderpressuredjetsor unstablerotationalmovement.Actualtestdurationshallbelongenoughtoprovidemeasurableamountsofwaterin thecollectorscompatiblew
34、iththeaccuracyrequiredforthetest. Forsprinklerswithprogrammedvariationsinoperatingcharacteristics,thedurationofthetestshallbelongenough tosubjectallcollectorstothesameoperationalsequences. 4.2.7 Locationofcollectors Thecollectorsshallbearrangedinasquaregridovertheentiretestarea(seeFigure1).Gridspaci
35、ngbetweentwo adjacentcollectorsshallbe: 2mmaximumforsprinklerswithradiuslargerthan10m; 1mmaximumforsprinklerswithradiusbetween5mand10m; 0,5mmaximumforsprinklerswithradiussmallerthan5m. Collectorsshallbeequidistantaccordingtobothaxesandequidistantwithrespecttothesprinklers.EN124845:2002(E) 7 Key 1Spr
36、inkler 2Grid 3Collector Figure1Layoutofcollectors(caseof squaresprinklerspacing) 4.2.8 Processingofdata Thecoefficientofdistributionuniformityshallbecomputedfromtheresultsofthesprinklerdistributiontestsinthe field.Thequantityofwatercollectedineachcollector,servesasabasisforcalculatingtheChristiansen
37、uniformity coefficient.Thefollowingformulaisused: - S - = m i m h n h h CC 1 100 where CC Christiansenuniformitycoefficientinpercentage; n isthenumberof readings; h m isthearithmeticalmeanofthereadingsormeasuredaveragepluviometry;EN124845:2002(E) 8 h i istheindividualreadingofeachcollector; S h m h
38、i isthedifferenceinabsolutevaluebetweenthemeanheight h m andthemeasuredheight h i . 4.3 Measurementoftheuniformityofdistributionofthelocalizedirrigationsystem Theflowvariationsbetweenthedifferentemittersshallbemeasuredforeachofthelocalizedsprayingpaths. 4.3.1 Testingmethod 4.3.1.1 Verificationofthei
39、nletpressureofthelocalizedirrigationsystem.Thepressureshallbeequalto thepressuredefinedinthedesignoftheproject. 4.3.1.2 Selectionofmeasurementpoints a) Thenumberoflateralsisequaltoone: Onthislateral,measuretheflowof4emitterschosenaccordingtothefollowingmanner: thefirstone; thelastone; theonelocateda
40、t1/3 rd ofthelateral; theonelocatedat2/3 rd ofthelateral. b) Thenumberoflateralsislessorequaltofour: Choosethebestandtheworstcaselaterals.Oneachone,measuretheflowof8emitterschosenaccordingto thefollowingmanner: thefirstoneandthesecondone; thelastoneandthepenultimateone; twoemitterslocatedat1/3 rd of
41、thelateral; twoemitterslocatedat2/3 rd ofthelateral. c)Thenumberoflateralsexceedsfour: Choosethebestandtheworstcaselaterals,thenthelaterallocatedat1/3 rd andthelaterallocatedat2/3 rd .On eachlateral,measuretheflowofemitterschosenaccordingtothefollowingmanner: thefirstone; thelastone; theonelocatedat
42、1/3 rd ofthelateral; theonelocatedat2/3 rd ofthelateral.EN124845:2002(E) 9 4.4 Computationoftheuniformitycoefficient Theuniformitycoefficient( CU)iscomputedusingthefollowingformula: 100 . min = mean Q Q CU where Q min .istheaverageofthefourlowestflowvalues; Q mean istheaverageofthe16flowmeasurements
43、. ThevalueoftheUniformityCoefficient( CU)shallbeequaltoorgreaterthanthatdefinedinthedesignofthe project. 4.5 Flowmeasurementofemitters Theminimumtimerequiredfortheflowmeasurementofanemittershallbe3min.Theminimumamountofwater collectedforanemittershallbe200cm 3 . 5 Presentationoftestresults Thetestreportshallrefertothisdraftstandardandprovid
