Brookfield DV3T Rheometer Bedienungsanleitung Seite 121

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Seitenansicht 120
Brookeld Engineering Labs., Inc. Page 121 Manual No. M13-2100
Rheometer Will Not Return to Zero
Rheometerisnotlevel
• Checkwithspindleoutofthesample.
• Adjustthelaboratorystand.
Pivotpointorjewelbearingfaulty
• PerformanOscillationCheck*
RemovethespindleandturnthemotorOFF;selectdisplayto%torquemode.
Gentlypushupontherheometercoupling.
Turnthecouplinguntilthedigitaldisplayreads10-15onthe%display.
Gentlyletgoofthecoupling.
Watchthedigitaldisplay;youshouldseea“run”ofnumbersnexttothe%;the“run”of
numbersshouldultimatelystopat0.0(+/-0.1).
IfthedigitaldisplaydoesnotreturntoZERO,theunitmostlikelyisinneedofservice.
• Performcalibrationcheck(seeAppendixE).
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerforrepair(see
AppendixM).
*Thisproceduredoesnotapplytoinstrumentswithballbearingsuspension(seeSectionI.3).
Display Reading Will Not Stabilize
Specialcharacteristicofsampleuid.Thereisnoproblemwiththerheometer.
• RefertoAppendixC.
Checkforerraticspindlerotation.
• Verifypowersupply
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerforrepair.
Bent spindle or spindle coupling.
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerforrepair.
Temperatureuctuationinsampleuid.
• Usetemperaturebathforcontrol.
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