To Next Page

To Previous Page

Brookeld Engineering Labs., Inc. Page 25 Manual No. M13-167

IfyourinstrumenthastheEZ-Locksystem,thespindlesareattached

as follows:

With one hand hold the spindle, while gently raising the spring-

loadedoutersleevetoitshighestpositionwiththeotherhand,as

shown in Figure III-2.  Insert the EZ-Lock Spindle Coupling so

thatthebottomofthecouplingisushwiththebottomoftheshaft,

andlowerthesleeve.Thesleeveshouldeasilyslidebackdownto

holdthespindle/couplingassemblyinplaceforuse.[Spindlescan

beidentiedbyentrycode;lookforthenumberonthesideofthe

EZ-Lockspindlecoupling.]

ThemotorshouldbeOFF whenever

spindlesarebeingremovedorattached.

Note: KeeptheEZ-LockSpindleCouplingand

outer sleeve as clean as possible and free

from debris that could become lodged

insidetheadapter.

III.4 Multiple Data Points

Themajorityofviscosityandyieldstressmeasurementsaremadeatthequalitycontrolleveland

oftenconsistofasingledatapoint.Thetestisconductedwithonespindleatonespeed.Thedata

pointisausefulbenchmarkforthego/no-godecisioninaproductionsetting.TheDV2Tcanbe

used for single point measurement.

Manyuidsexhibitacharacteristicchangeinviscosityandyieldstresswithachangeinapplied

force.Thisnon-Newtonianowbehavioriscommonlyseeninpaints,coatingsandfoodproducts

asadecreaseinviscosityasshearrateincreasesoranincreaseinyieldstressasarotationalspeed

increases.Thisbehaviorcannotbedetectedorevaluatedwiththesinglepointmeasurement.

Non-Newtonianowisanalyzedthroughthecollectionofviscositydataoverarangeofshearrates

andthegenerationofagraphofviscosityversusshearrate(arheogram).Thisinformationwill

allowforamorecompletecharacterizationofauidandmayhelpinformulationandproduction

ofaproduct.TheDV2Tiscapableofcollectingmultipledatapointsforcomprehensiveanalysis

ofowbehaviorwhenusingtestprogramscreatedwithPGFlashSoftware(seeSectionV).

Moreinformationonowbehavior,shearrateandrheogramsisavailableinourpublication,“More

SolutionstoStickyProblems”.

III.5 Selecting Data Collection

TheDV2TViscometeroffersseveraloptionsfordatacollection.TheDataCollectionsettingis

showninCongureViscosityTestdirectlyundertheTemperaturedisplay.Thefactorysettingis

SinglePoint(seeFigureIII-3).Pressingthebluearrow,inthiseld,willpresenttheDataCollection

screen(seeFigureIII-4).

Figure III-2

Brookfield DV2T User Manual

Questions and Answers: