Brookfield DV2T Viscometer Manual do Utilizador descarregar pdf (Página 74)

Brookeld Engineering Labs., Inc. Page 74 Manual No. M13-167-B0614

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.

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Comentários a estes Manuais

Sachin Vaijanath Ashture 05 Mar 2025 | 15:48:33

It's good information

Brookfield DV2T Viscometer Manual do Utilizador Página 74

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