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DeadWeightTestersPD6DeadweighttestersforpressurisedairorneutralgasModelsPD10Pressureranges0.1...6bar,0.1...10barand0.1...25barPD25Deadweighttestersareusedforexaminationandcalibrationofpressuregaugesandotherpressuremeasuringinstrumentswithoutusinganexternalinstrument.Themaincomponentsarethemeasuringsystem,thevalveunits,thebuilt-inscrewpumpforaccuratepressureadjustmentandthesetofweights.Themeasuringsystemitselfconsistsofapreciselapped-inpairofpistonandcylinder.Duringthemeasuringprocessthepistonisforcedupbythepressureproducedwiththebuilt-inscrewpumpre-spectivelywithexternalpressuresupply,whiletheregularweightsandmaybefurtherextraweights,ifrequiredforthedesignatedtestpressure,pressitdown.Withthebuilt-inscrewpumpthetestpressurecanbeadjustedtoanequilibriumoftheforces.Whentheforcesonbothsidesofthepistonareinbalance,thepistonwillbefloating,andthedesignatedtestpressureisreachedexactly.Forsimplifyingthehandling,theinstrument-specificweightsarealreadyreferredtoeachrelevantdeterminedpistonareaandstampedwiththepressureunit(bar/kPa).Theinfluenceofthefrictionbetweenpistonandcylinderismini-misedbykeepingpistonandweightsrotatingwhilefloating.ThemodelsdescribedinthisdatasheetareavailableforpressurePD25ranges0.1to6,0.1to10resp.0.1to25bar.TechnicaldataScopeofdelivery•Pressurerange:PD60.1to6barBesidethedeadweighttesterandthesetofweightsthescopeofPD100.1to10bardeliverycomprisesthefollowing:PD250.1to25bar•1operatinginstruction•Setofweightsinbar/kPa•1canisterwith1litrespecialoil(drillingoilandsealingliquid)•ExternalpressurisedairsupplyforPD10andPD25required,•1coverplateindeedashighasthepressuresthathavetobeexamined1);•1specialsealingfortestitemwith2chamberedo-ringsexternalpressurisedairsupplyforPD6recommended•4o-ringsasreplacement(comparepage2)•2expansionplugsforN6x1(admissionpressureconnection)•Accuracyoftheadjustedexaminationpressure:better0.05%formodelsPD6andPD10resp.0.03%(withofficialverificationorDKD-approval)referred•2plugsfor"oildrains"(21,26com
