To Next Page

To Previous Page

Brookeld Engineering Labs., Inc. Page 37 Manual No. M13-167

asthixotropyorpseudoplasticity(shearthinning).Materialsthatexhibitthixotropywillshowa

steadilydecreasingmeasuredviscosityovertime.Materialsthatexhibitpseudoplasticitywillshow

achangingviscosityasthespindlespeedchanges.

TIP: Whenaveraging datafor a thixotropicmaterial, begin theAveragingDuration after the

periodofmostsignicantchangeinmeasuredviscosity.Thiswillreducethevariabilityin

theaveragedvalue.

TIP: Whenaveragingdataforapseudoplasticmaterial,donotaveragetogether(TestAveraging)

datacollectedatdifferentspeeds(orshearrates).

Live Averaging of data occurs during actual testing of a sample. Data can be collected as an average

ofreadingsoveraspecictimeinterval;eachdatapointsavedintheleisanaveragedvalue.This

averagingisdenedintheDataCollectionsectionofCongureViscosityTest.

Single Point AveragingrequiresadenitionofAveragingDuration,theamountoftimefor

whichreadingswillbeaveraged.ThistimeparameterwillbeappliedattheendoftheEnd

Condition.Inthiscaseasingledatapointwillbecollectedwhichrepresentstheaverageofall

datameasuredduringthespeciedtimeperiod(AveragingDuration).

Multi Point Averagingrequiresadenitionof1)DataInterval,thefrequencyofdatacollection

and2)AveragingDuration,theamountoftimeforwhichreadingswillbeaveraged.Thesetwo

parameterswillworkinconjunctiontogeneratemultipledatapointseachofwhichrepresent

theaverageofalldatameasuredduringtheaveragedurationwithinthespeciedDataInterval.

PostTestAveragingofdataoccursafterthetestiscomplete,throughtheResultsscreen.Averages

and standard deviation values can be generated for data collected in a single step or across several

stepsofatestgeneratedthroughPGFlashsoftware.IfthetestusedtocollectdatautilizedLive

Averaging(describedabove),thenthePostTestAveragingwillproduceanaveragevalueofaveraged

data points.

PostTestAveragingcanbespeciedintheReportsectionofCongureViscosityTest(seeSection

III.7).Whenconguredaspartofthetest,theaveragevalueswillbedisplayedimmediately

upontestconclusion.IfnotspeciedinReport,PostTestAveragingcanbeselectedfromthe

DownArrowintheResultsscreen(seeSectionIII.9).

PostTestAveragingofferstwooptions:StepAveragingandTestAveraging(seeFigureIII-13).

Figure III-13

Brookfield DV2T User Manual

Questions and Answers: