
Brookeld Engineering Labs., Inc. Page 90 Manual No. M13-167-B0614
❏ Viscometer Will Not Return to Zero
✓ Viscometerisnotlevel
• Checkwithspindleoutofthesample.
• Adjustthelaboratorystand.
✓ Pivotpointorjewelbearingfaulty
• PerformanOscillationCheck*
✓RemovethespindleandturnthemotorOFF;selectdisplayto%torquemode.
✓ Gentlypushupontheviscometercoupling.
✓ Turnthecouplinguntilthedigitaldisplayreads10-15onthe%display.
✓ Gentlyletgoofthecoupling.
✓ Watchthedigitaldisplay;youshouldseea“run”ofnumbersnexttothe%;the
“run”ofnumbers shouldultimatelystopat0.0(+/-0.1).
IfthedigitaldisplaydoesnotreturntoZERO,theunitmostlikelyisinneedof
service.
• Performcalibrationcheck(seeAppendixF).
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerfor
repair(seeAppendixO).
*Thisproceduredoesnotapplytoinstrumentswithballbearingsuspension(seeSection
I.3).
❏ Display Reading Will Not Stabilize
✓ Specialcharacteristicofsampleuid.Thereisnoproblemwiththeviscometer.
• RefertoAppendixC.
✓ Checkforerraticspindlerotation.
• Verifypowersupply
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerfor
repair.
✓ Bent spindle or spindle coupling.
• ContactBrookeldEngineeringLaboratories,Inc.oryourBrookelddealerfor
repair.
✓ Temperatureuctuationinsampleuid.
• Usetemperaturebathforcontrol.
It's good information