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3.2 Pumpcapacityandin/outowofthepit
In-/outflow and pump capacity calculation
Function
• Calculatestheinowusinglevelchangepertimeunitandsurfacearea.
• Calculatesthepumpcapacityeverytimeapumprunsbyitself.
• Pumpandsystemdatacanbeenteredforamoreexactcalculation.
• Anevenhigherowcalculationaccuracyisobtainedifapressuresensorismountedon
the mains outlet.
• Outowcalculationcompensationforrpm.
• Outowcanbetakenfromaowmeter.
Value
• Servicethepumpbeforebreakdown,avoiding/reducingoverows.
• Avoidwastingenergyusingpumpswithdegradedeciency.
• Servicecanbeplannedtooccurduringnormalworkinghours.
• Noexternalowmeterrequired.
• Accurateoverowmeasurement
The PC 441 supports several approaches to flow calculation and combinations thereof
1. Flowisbasedonmanuallyenteredcapacityvaluesforeachpump.Thisdataisthenusedtotheoretically
calculatethepumpedvolumebymultiplyingcapacitydatawithrunninghours.
Pros: Simpleset-up
Cons: Noactualpumporsystemhealthcheck
2. Flowisbasedonaowmeasuringdevicemountedonthemains.
Pros: Simpleset-upwithaccurateowmeasurementifmountingcriteriaaremet
Cons: Noinformationoninowandcollectionsystembehaviour