Brookfield DV3T Rheometer Uživatelský manuál Strana 120

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Brookeld Engineering Labs., Inc. Page 120 Manual No. M13-2100
Appendix J - Fault Diagnosis and Troubleshooting
ListedaresomeofthemorecommonproblemsthatyoumayencounterwhileusingyourRheometer.
Spindle Does Not Rotate
Makesuretherheometerispluggedin.
Checkthevoltageratingonyourrheometer(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rheometercoupling.
Checkthestraightnessofallotherspindles;replaceifbent.
Inspectrheometer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rheometer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DV3T.
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
• “DV3TRheometer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.
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