Brookfield DV2+Pro Viscometer Manual do Utilizador descarregar pdf (Página 5)

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101

Brookeld Engineering Labs., Inc. Page 5 Manual No. M03-165-F0612

I. INTRODUCTION

TheBrookeldDV-II+ProViscometermeasuresuidviscosityatgivenshearrates.Viscosity

isameasureofauid’sresistancetoow.Youwillndadetaileddescriptionofthescienceof

viscosityintheBrookeldpublication“More Solutions to Sticky Problems” a copy of which was

included with your DV-II

+Pro.

The DV-II+Pro offers exceptional versatility in modes of control allowing for traditional standalone

operation, automatic operation through programs downloaded from the PC or with complete

controlbyPCusingBrookeldRheocalcSoftware.

 • TheDV-II+ProcanbeusedasatraditionalBrookeldviscometerforcollectionofsingle

speed viscosity data through the easy to use keypad; just select the spindle and speed and

read the value from the display. [See Section II, Getting Started]

 • TheBrookeldDVLoaderSoftwarecanbeusedtoprogramtheDV-II+Protocontrolall

aspects of the test and data collection without the need for the operator to monitor the

instrument; just start the program and return to the printed test data (printer is optional).

[See Section V, DVLoader Software]

 • TheBrookeldRheocalcSoftwarewillperformallcontrolanddatacollectionfunctionsof

the DV-II+Pro from the PC while also providing a platform for advanced data collection

and analysis. [See Section II.9, External Control]

In any of these modes of control, the DV-II+Pro will provide the best in viscosity measurement

and control.

The principal of operation of the DV-II

+Pro is to drive a spindle (which is immersed in the test

uid)throughacalibratedspring.Theviscousdragoftheuidagainstthespindleismeasuredby

thespringdeection.Springdeectionismeasuredwitharotarytransducer.Themeasurement

range of a DV-II+Pro (in centipoise or milliPascal seconds) is determined by the rotational speed

of the spindle, the size and shape of the spindle, the container the spindle is rotating in, and the

full scale torque of the calibrated spring.

TherearefourbasicspringtorqueseriesofferedbyBrookeld:

Spring Torque

Model dyne/cm milli Newton/m

LVDV-II

+Pro 673.7 0.0673

RVDV-II+Pro 7,187.0 0.7187

HADV-II+Pro 14,374.0 1.4374

HBDV-II

+Pro 57,496.0 5.7496

The higher the torque calibration, the higher the measurement range. The measurement range

for each torque calibration may be found in Appendix B.

All units of measurement are displayed according to either the CGS system or the SI system.

1. Viscosity appears in units of centipoise (shown as “cP”) or milliPascal-seconds (shown as

“mPa•s”)ontheDV-II

+Pro Viscometer display.

2. Shear Stress appears in units of dynes/square centimeter (“D/cm

”) or Newtons/square

meter (“N/m

”).

3. Shear Rate appears in units of reciprocal seconds (“1/SEC”).

4. Torque appears in units of dyne-centimeters or Newton-meters (shown as percent “%” in

both cases) on the DV-II

+Pro Viscometer display.

Note: To change CGS to SI units on the display - see Section IV.2.2.

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