Brookfield DV2T - Page 87

Brookeld Engineering Labs., Inc. Page 87 Manual No. M13-167
❏ Viscometer Will Not Return to Zero
✓ Viscometer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viscometer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viscometer.
  • 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.