Brookfield DV2T Viscometer Instrukcja Użytkownika Pobierz pdf (Strona 77)

Brookeld Engineering Labs., Inc. Page 77 Manual No. M13-167-B0614

However,instrumentaccuracyis±2%ofthemaximumviscosityrangeandnot

thestandard1%.

Calibration Procedure for Cone/Plate Viscometers

1) Followtheaboveproceduresformechanicallyadjustingthesettingoftheconespindle

totheplate.

2) RefertoAppendixA;TableA-1,anddeterminethecorrectsamplevolumerequired

fortheselectedspindle.

3) Selectaviscositystandarduidthatwillgiveviscosityreadingsbetween10%and

100%offullscalerange.RefertoAppendixBforviscosityrangesofconespindles.

ConsultwithBrookeldoranauthorizeddealertodeterminewhichuidisappropriate.

 Itisbesttouseaviscositystandarduidthatwillbeclosetothemaximumviscosity

for a given cone spindle/speed combination.

Example:

DV2TLVViscometer,ConeCP-42,Fluid10

     Havingaviscosityof9.7cPat25°C

 At60RPM,thefullscaleviscosityrangeis10.0cP.Thus,theViscometerreading

shouldbe97%torqueand9.7cPviscosity±0.197cP(0.1cPfortheviscometerplus

0.097cPfortheuid).TheaccuracyisacombinationofViscometeranduidtolerance

(refertoInterpretationofCalibrationTestResults).

4) Withtheviscometerstopped,removethesamplecupandplacetheviscositystandard

uidintothecup,waiting10minutesfortemperatureequilibrium.

5) ConnectthesamplecuptotheViscometer.Allowsufcienttimefortemperatureto

reachequilibrium.Typically15minutesisthemaximumtimethatyoumustwait.Less

timeisrequiredifspindleandcuparealreadyattesttemperature.

6) MeasuretheviscosityandrecordtheViscometerreadinginboth%torqueandcentipoise

(cP).

Notes: 1) The spindle must rotate at least ve (5) times before a viscosity

reading is taken.

  2) TheuseofBrookeldViscosityStandarduidsintherangeof5cPto

5000 cP is recommended for cone/plate instruments. Please contact

Brookeld Engineering Laboratories or an authorized dealer if your

calibrationprocedurerequiresmoreviscousstandards.

 3) Selectaviscositystandarduidthatwillgiveviscosityreadingsbetween

10%and100%of fullscalerange.Refer toAppendixBforviscosity

rangesofconespindles.Donotuseasiliconeviscositystandarduid

withaviscosityvaluegreaterthan5000cPwithaCone/PlateViscometer.

Brookeld offers a complete range of mineral oil viscosity standards

suitable for use with Cone/Plate Viscometersas shown inTable E-2.

ConsultwithBrookeldoranauthorizeddealertodeterminewhichuid

is appropriate.

Interpretation of Calibration Test Results:

WhenverifyingthecalibrationoftheDV2T,theinstrumentandviscositystandarduid

errormustbecombinedtocalculatethetotalallowableerror.

TheDV2Tisaccurateto(+/-)1%oftherangeinusewhenusingspindlesLV#1-3,RV

#2-6,HA#2-6andHB#2-6.WhenusinganaccessorydevicewiththeDV2Tsuchas

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

It's good information

Brookfield DV2T Viscometer Instrukcja Użytkownika Strona 77

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