Brookfield DV3T - Page 68

Brookeld Engineering Labs., Inc. Page 68 Manual No. M13-167-A0415
Code Thecodeisthenumericalvalueusedtoselectthespindle.Thisvalue
mustbeuniqueandcannotbethesameasastandardBrookeld
spindle.TheacceptablerangeforCodeis100-199.
Name TheNameisauniquevaluetodescribethespindle.TheNamewill
bedisplayedintheSpindleeld.TheNamecanbecomprisedof
alphaandnumericcharacters.
SMC TheSMC(SpindleMultiplierConstant)isusedtoconvertthemeasured
torquetoviscosity.TheacceptablerangeofSMCis0.001–500.
The SMC value can be determined through the use of the Range
equationfoundinappendixD.Someexperimentationwiththespindle
andacalibratedviscositystandardisrequired.
Range(cP)=TK*SMC*10,000/RPM
TheTorqueConstant(TK)canbefoundinTableD-2inAppendixD.
SRC TheSRC(ShearRateConstant)isusedtoconvertthesetRPMto
shearrateandcalculateShearStress.TheacceptablerangeofSRC
is0.001–500.
TheSRCvaluecanbedeterminediftheshearratecharacteristicsof
thespindlegeometryareknown.ConsulttheBrookeldpublication,
“MoreSolutionstoStickyProblems”,foradiscussionaboutshear
rateandsomerecommendedequations.
ShearRate(1/s)=SRC*RPM
YMC TheYMC(YieldMultiplierConstant)isusedtoconvertthemeasured
torquetoyieldstress.
Speed List: TheselectionofSpeedinCongureViscosityTestcanbedonebyusingeithera
numberpadorascrolllist.(Thischoiceisselectedthroughthenavigationbuttonin
theSetSpindlescreen.)Whenscrolllistisselected,thespeedentryisrestrictedto
theclassicBrookeldspeedsetsfortheLVandRV/HA/HBrheometers.Thecontents
ofthescrolllistaredenedintheSpeedListmenu.Eachspeedcanbeindividually
selectedordeselectedthroughtheuseofacheckbox.Selectordeselectallspeeds
byusingtheSelectAllcheckbox.SelectordeselectallLV(orRV/HA/HB)speeds
byusingtheSelectAllLVcheckbox.TheclassicBrookeldspeedsetsaredened
below.
LV: 0.3,0.6,1.5,3,6,12,30,60
RV/HA/HB: 0.5,1.0,2.0,2.5,4,5,10,20,50,100
Additionally,anewspeedcanbeaddedtothelistbyselectingtheNewSpeedcommand
keyatthebottomofthedisplay.TheNewSpeedmustbeselectedwithintherange
ofavailablespeedsontheDV3T:0.0–250RPM.
Speedentrythroughthenumberpadisneverrestricted.
TIP:  Toensurethatthecorrectspeedisalwaysentered,createatestthatissaved
totheDV3Tmemory.
TIP:  TheselectionofspeedcanberestrictedbyUserLogIn.Usethisrestriction
combinedwithasavedtestcongurationtoensurethatthecorrectspeed
isalwaysusedforcriticaltests.SeeSectionV.4.2fordetailsofUsersand
Access.