Brookfield DV3T Rheometer Manual do Utilizador descarregar pdf (Página 35)

Brookeld Engineering Labs., Inc. Page 35 Manual No. M13-2100

TIP:AnEndConditionofzeroTimecanbeusefulwhenmeasuringanewmaterial.

Duringthetest,thespeedcanbechangedwithoutendingandthenrerunning

thetest(seeSectionIII.10).Thismethodcanallowyoutoquicklyevaluatethe

spindleselectiontodeterminethebestspeedsfortesting.

# of Points:Thetestwillcompletewhenthespeciednumberofdatapointshasbeencollected.

DataiscollectedaccordingtotheDataCollectionsetting(seeSectionIII.6).The

rangeofdatapointsis:1–9,999.

# of Revolutions:Thetestwillcompletewhenthespeciednumberofrevolutionsofthespindle

hasoccurred.DataiscollectedaccordingtotheDataCollectionsetting(see

SectionIII.6).Therangefornumberofrevolutionsis:1–9,999.

Torque:ThetestwillcompletewhenthespeciedTorquevalueismeasured.Dataiscollected

accordingtotheDataCollectionsetting(seeSectionIII.6).Therangeofvaluesfor

themeasuredTorqueis:-10.0–100.0.

Viscosity:ThetestwillcompletewhenthespeciedViscosityvalueismeasured. Datais

collectedaccordingtotheDataCollectionsetting(seeSectionIII.6).Therangeof

measuredViscosityis0–10,000,000,000cP.

 Note:TheViscosityEndConditionshouldbeselectedinconsiderationoftheRange

providedbythespindleandspeedselected.ChecktheRangevaluebyselecting

Spindle in CongureViscosityTest.  If you choose aViscosity End Condition

greaterthantheRangeofthespindleandspeedsettings,thenthevalueshownin

theEndConditioneldwillbeEEEE.Inthiscase,theendconditionwillneverbe

achieved.

Temperature: ThetestwillcompletewhenthespeciedTemperaturevalueismeasuredto

withintheindicatedTolerance.TheTolerancespecieshowclosethemeasured

temperatureshouldbetothespeciedtemperaturevaluetoconsiderthetarget

reached.TemperatureismeasuredthroughtheuseofaconnectedBrookeld

temperatureprobe(DVP-94Y,CPA-44ZPYcup,SC4-XXRPYchamber).Data

iscollectedaccordingtotheDataCollectionsetting(seeSectionIII.6).

Temperature:-100–300C

Tolerance:0.0–9.9C

TIP: Asmalltolerancevaluewillrequireamuchlongertimetoreachthe

End Condition.

TIP: ConsiderusingalargerTolerancevaluefortheEndConditionand

thenuseasecondstepforthermalequilibrium(EndConditionTime).

Thistwostepmethodcanreducethevariabilityintesttimecausedby

variations in temperature sensors.

III.9 Additional Test Parameters

TheCongureViscosityTestscreenincludesaMore/LessBar.Whenpressed,theMoreBarwill

presentseveraladditionalTestParametersincluding:QCLimits,Instructions,Reports,andDensity.

TheseparametersarealwaysavailableandactiveregardlessofthepositionoftheMore/LessBar.

QC Limits:Selectanacceptablerangeformeasurementresults.Therangemaybedened

byViscosity,Torque,Time,Temperature,orShearStress.Thepossiblerangefor

ViscosityandShearStresswillbedenedbythespindleandspeedselected.QC

Limitsareavisualandaudiblesignaltotheoperatorduringthetest.Thedataset

does not include an indication of QC Limits violation.

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