Brookfield DV2T Viscometer Instrukcja Użytkownika Pobierz pdf (Strona 61)

Brookeld Engineering Labs., Inc. Page 61 Manual No. M13-167-B0614

A.4 Verifying Calibration

1. Determinetheappropriatesamplevolume.RefertoTableA-1todeterminethecorrect

samplevolumerequiredforthespindletobeutilized.

2. SelectaBrookeld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.

 BrookeldusesmineraloilviscositystandarduidstocalibrateWellsBrookeldCone/

PlateViscometersatthefactory.Brookeldrecommendsthatcustomersusemineral

oilviscositystandarduidswhenyouperformacalibrationcheck.

 Ifyoudecidetouseasiliconeviscositystandarduid,donotuseauidwithaviscosity

valuegreaterthan5000cPwithaCone/Plate.Brookeldoffersacompleterangeof

mineraloilviscositystandardssuitableforusewithCone/Platesforviscositiesabove

5,000cPorshearratesabove500sec

-1

;seeTableF-2inAppendixFforalistofavailable

uids.

 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 Spindle CPA-42Z, Brookeld Silicone Viscosity

Standard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.Theallowableerror(±0.197cP)

isacombinationofViscometeraccuracyanduidtolerance(refertoInterpretation of

Calibration Test Results inAppendixF).

3. Withthemotoroff,removethesamplecupandplacetheviscositystandarduidinto

thecup.

Table A-1

Cone Part No.

CPA-40Z,CPE-40,CP-40

CPA-41Z,CPE-41,CP-41

CPA-42Z,CPE-42,CP-42

CPA-51Z,CPE-51,CP-51

CPA-52Z,CPE-52,CP-52

Sample Volume

0.5 mL

2.0 mL

1.0 mL

0.5 mL

4. AttachthesamplecuptotheViscometerandallowsufcienttimeforthesample,cup

andconetoreachtemperatureequilibrium.

5. Turnthemotoron.Setthedesiredspeed(s).Measuretheviscosityandrecordthe

readinginboth%torqueandcentipoise(cP).

6. Verifythattheviscosityreadingiswithintheallowable1%deviation,asexplainedearlier,

forthespecicviscositystandarduid(s)thatyouareusing.

 TheCPEorCPAdesignationontheconespindleindicatesusewithElectronicGap

SettingCone/PlateViscometers/Rheometersonly.

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

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Brookfield DV2T Viscometer Instrukcja Użytkownika Strona 61

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