Brookfield DV2T Viscometer - Manual (Page 5)

Brookfield Engineering Labs., Inc. Page 5 Manual No. M13-167-B0614
I. INTRODUCTION
The Brookfield DV-II Viscometer series has been the leading industrial viscometer since it
was first introduced in 1985. Brookfield has continued to develop and improve the DV-II to
provide the best value in the market for both quality control and research customers. The
Brookfield DV2T Viscometer continues in this tradition of innovation, quality and value. The
incorporation of a full color graphical touch screen display has allowed for a new and improved
user interface which preserves the single speed data collection methods while making all of
the advanced features of the DV2T readily available.
The Brookfield DV2T Viscometer measures fluid viscosity at given shear rates. Viscosity is
a measure of a fluid’s resistance to flow. You will find a detailed description of the science of
viscosity in the Brookfield publication “More Solutions to Sticky Problems”, a copy of which
was included with your DV2T.
This manual covers the DV2T Viscometer and the DV2T Extra Viscometer. The DV2T Extra is
a special package that includes several optional features to maximize the utility of the DV2T.
The DV2T Extra includes: Ball Bearing Suspension (not included in LV versions), EZ-Lock
spindle connection, Model Q Lab Stand, and RheocalcT Software. These differences are
detailed in the Components section of the manual. All references to the viscometer in this
manual will be made as DV2T. All of the optional features of the DV2T Extra may be added
individually to the DV2T Viscometer.
• The DV2T offers exceptional versatility in modes of control, allowing choice of traditional
standalone operation and automatic operation through programs downloaded from
the PC or with complete control by PC using Brookfield RheocalcT Software.
• The DV2T can be used as a traditional Brookfield viscometer for collection of single
speed viscosity data through the easy to use touch screen; just select the spindle and
speed and read the value from the display. [See Section II: Getting Started]
• The Brookfield PG Flash Software can be used to program the DV2T 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: PG Flash Software]
• The Brookfield RheocalcT Software will perform all control and data collection functions
of the DV2T from the PC while also providing a platform for advanced data collection
and analysis.
In any of these modes of control, the DV2T will provide the best in viscosity measurement
and control.
The principal of operation of the DV2T is to drive a spindle (which is immersed in the test fluid)
through a calibrated spring. The viscous drag of the fluid against the spindle is measured by the
spring deflection. Spring deflection is measured with a rotary transducer. The measurement
range of a DV2T (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 Brookfield:
Spring Torque
Model dyne
•cm
milliNewton
•m
DV2TLV
673.7 0.0673
DV2TRV 7,187.0 0.7187
DV2THA 14,374.0 1.4374
DV2THB 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.