Brookfield DV2T - Appendix J - Fault Diagnosis and Troubleshooting; Spindle and Rotation Issues; Reading Accuracy and Stability

Brookeld Engineering Labs., Inc. Page 86 Manual No. M13-167
Appendix J - Fault Diagnosis and Troubleshooting
ListedaresomeofthemorecommonproblemsthatyoumayencounterwhileusingyourViscometer.
❏ Spindle Does Not Rotate
✓Makesuretheviscometerispluggedin.
✓Checkthevoltageratingonyourviscometer(115,220V);itmustmatchthewallvoltage.
✓MakesurethemotorisONandthedesiredrpmisselected.
❏ Spindle Wobbles When Rotating or Looks Bent
✓Makesurethespindleistightenedsecurelytotheviscometercoupling.
✓Checkthestraightnessofallotherspindles;replaceifbent.
✓Inspectviscometercouplingandspindlecouplingmatingareasandthreadsfordirt;cleanthreads
onspindlecouplingwitha3/56left-handtap.
✓Inspectthreadsforwear;ifthethreadsareworn,theunitneedsservice(seeAppendixM).Check
toseeifspindlesrotateeccentricallyorwobble.Thereisanallowablerunoutof1/32-inchin
eachdirection(1/16-inchtotal)whenmeasuredfromthebottomofthespindlerotatinginair.
✓Checktoseeiftheviscometercouplingappearsbent;ifso,theunitisinneedofservice(see
AppendixM:WarrantyRepairandService).
❏ Inaccurate Readings
✓Verifyspindle,speedandmodelselection.
✓VerifyspindleselectioniscorrectonDV2T.
✓ If%readingsareunder-range(lessthan10%),thedisplaywillash;changespindle and/or
speed.
✓“EEEE”onthedigitaldisplaymeanstheunitisover-range(greaterthan100%);reducespeed
and/orchangespindle.
✓ Verifytestparameters:temperature,container,volume,method.Referto:
  • “MoreSolutionstoStickyProblems”,SectionIII
  • “DV2TViscometerOperatingInstructions”,AppendixC:VariablesinViscosityMeasurements
✓Performacalibrationcheck;followtheinstructionsinAppendixE.
✓ Verifytolerancesarecalculatedcorrectly.
✓Verifythecalibrationcheckprocedureswerefollowedexactly.
Iftheunitisfoundtobeoutoftolerance,theunitmaybeinneedofservice.SeeAppendixM
fordetailsonWarrantyRepairandService.