To Next Page

To Previous Page

Brookeld Engineering Labs., Inc. Page 73 Manual No. M13-167

BrookeldViscosityStandardFluidGeneralInformation

We recommendthatBrookeldViscosityStandardFluidsbereplacedonanannualbasis,one

yearfromdateofinitialuse.Theseuidsarepuresiliconeandarenotsubjecttochangeover

time.However,exposuretooutsidecontaminantsthroughnormaluserequiresreplacementon

anannualbasis.Contaminationmayoccurbytheintroductionofsolvent,standardofdifferent

viscosityorotherforeignmaterial.

ViscosityStandardFluidsmaybestoredundernormallaboratoryconditions.Disposalshouldbe

inaccordancewithstate,localandfederalregulationsasspeciedonthematerialsafetydatasheet.

BrookeldEngineeringLaboratoriesdoesnotrecertifyViscosityStandardFluids.Wewillissue

duplicatecopiesoftheCerticateofCalibrationforanyuidwithintwoyearsofthepurchase

date. BrookeldViscosity StandardFluids are reusableprovided they arenot contaminated.

Normalpracticeforusageina600mLbeakeristoreturnthematerialfromthebeakerbackinto

thebottle.WhenusingsmallervolumesinaccessoriessuchasSmallSampleAdapter,ULAdapter

orThermosel,theuidisnormallydiscarded.

CalibrationProcedureforLV#1-3(#61-63)andRV,HA,HB#1-6BrookeldSpindles

Please note that the LV #4 (64) and RV, HA, HB #7 (07) spindles have been omitted from this

procedure.Brookelddoesnotrecommendtheuseofthesespindlestoperformacalibration

check on your instrument. Reasons pertain to the small amount of spindle surface that

makescontactwiththeviscositystandard,thedifcultyofestablishingtheimmersionmark

precisely and the need for precise temperature control at 25°C in the immediate vicinity of

the spindle.

Followthesestepsusingoneoftherecommendedspindlestoverifycalibrationonyourinstrument:

1) Placetheviscositystandarduid(inthepropercontainer)intothewaterbath.

2) LowertheDV2Tintomeasurementposition(withguardlegifLVorRVseriesViscometer

isused).

3) AttachthespindletotheViscometer.Ifyouareusingadisk-shapedspindle,avoidtrapping

airbubblesbeneaththediskbyrstimmersingthespindleatanangle,andthenconnecting

ittotheViscometer.

4) Theviscositystandarduid,togetherwiththespindle,shouldbeimmersedinthebathfor

aminimumof1hour,stirringtheuidperiodically,priortotakingmeasurements.

5) After 1 hour, check the temperature of the viscosity standard uid with an accurate

thermometer.

6) Iftheuidisattesttemperature(±0.1°Cofthespeciedtemperature,normally25°C),

measuretheviscosityandrecordtheViscometerreading.Note: The spindle must rotate at

least ve (5) times before readings are taken.

7) TheviscosityreadingshouldequalthecPvalueontheuidstandardtowithinthecombined

accuraciesoftheViscometerandtheviscositystandard(asdiscussedinthesection,atthe

endofthisAppendix,entitledInterpretationofCalibrationTestResults)whichappears

laterinthissection.

Brookfield DV2T User Manual

Questions and Answers: