Brookfield DV2+Pro Viscometer Bedienungsanleitung PDF herunterladen (Seite 83)

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101

Brookeld Engineering Labs., Inc. Page 83 Manual No. M03-165-F0612

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:

LVDV-II

+Pro 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DV-II+Pro,theinstrumentandviscositystandarduiderror

must be combined to calculate the total allowable error.

The DV-II+Pro 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 DV-II+Pro such as Small

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