Brookfield DV3T Rheometer Manuel d'utilisateur télécharger pdf (Page 120)

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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Brookfield DV3T Rheometer Manuel d'utilisateur Page 120