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1、DWM2000DOperatinginstructionsDWM?2000ElectromagneticFlowmeterwithLCDIndicatorContents1Displaydatainoperatingmode…………………………………………………………………..32FunctionsoftheLCDindicatorfortheDWM2000D………………………………………..42.1Programmableparameters………………………………………………………………………..
2、42.1.1Flowcalibration………………………………………………………………………42.1.2Currentoutputadjustment………………………………………………………….42.1.3Timeconstant………………………………………………………………………..42.2Electronicsmodulechecks……………………………………………………………………..52.3Programmingstructure(Softwaren°1.02)……………………………
3、…………………………52.3.1Userinterfacebuttons………………………………………………………………52.3.2Menunaviagation……………………………………………………………………62.3.3Summaryofprogrammingmenus…………………………………………………82.4ParametersstoredintheEEPROM(menu2.4.3)…………………………………………….102.5Errormessagelist………………………………………
4、………………………………………..112OperatingInstructionsDWM2000D1DisplaydatainoperatingmodeOperatingInstructionsDWM2000D32FunctionsoftheLCDindicatorfortheDWM2000D2.1Programmableparameters2.1.1FlowcalibrationTheGKcanbemodifiedinmenu2.1.3inordertoobtainthemaximumaccurac
5、yatoperatingconditions.Afieldcalibrationrequiresanaccuratereferenceofvelocity.Themeterrecalibration(GKmodification)isalsorecommendedafteranexchangeofelectronicsmodule.Thevalueofthenewcalibrationconstant(GKnew)canbecalculatedasfollows:GKnew=GKoldxVaVmwit
6、h:Va=actualvelocityVm=measuredvelocity(referencevalue)2.1.2CurrentoutputadjustmentTheminimumvalue(i0%)andthemaximumvalue(i100%)ofthecurrentoutputatnormaloperatingconditionscanbeadjustedfrommenus2.2.2.and2.2.3.Theactualvaluesofthei0%andthei100%mustbemeas
7、uredwithanaccuratemilliammeterina4...20mAloop.i0%mustbeintherange3....12mA.Thefactorysettingis4mA.i100%mustbeintherange12....21mA.Thefactorysettingis20mA.2.1.3TimeconstantThetimeconstantvaluecanbesetinmenu2.2.4.Thisvaluerepresentsthetimeneededtodetect63
8、%ofasimulatedflowrateinstantaneouslyraisedfrom0to100%.Timeconstantrange:5,10,15,20,25,30,50m.4OperatingInstructionsDWM2000D2.2ElectronicsmodulechecksVariousparametersfromtheelectronicsmodulecanbevieweddirectlyfortroubleshootingpu
