Brookfield DV2+Pro Viscometer User Manual

Page 23

Brookfield Engineering Labs., Inc.

Page 23

Manual No. M03-165-F0612

maximum accuracy, readings below 10% should be avoided.

Record

values.

4. Press the

MOTOR ON/OFF/ESCAPE

key and turn the motor “OFF” when changing a spindle or

changing samples. Remove spindle before cleaning.

5. Interpretation of results and the instrument’s use with non-Newtonian and thixotropic materials

is discussed in the booklet, “More Solutions to Sticky Problems”, and in Appendix C, Variables

in Viscosity Measurements.

II.11 Time Modes for Viscosity Measurement

The

Time Modes allow the viscometer user to implement the unattended Time to Stop and Time to

Torque capabilities of the DV-II+Pro Viscometer. These features will allow the user to set up the

viscometer (i.e. select spindle and speed) and then record readings for a fixed period of time (Time

to Stop) or until a set torque value is attained (Time to Torque). When timing begins, a message will

be displayed showing time remaining (or time elapsed) and the appropriate display item (viscosity

or torque) will be updated continuously during the event. Upon completion, the viscometer will

stop and display a screen stating that the test is complete and will also display the final recorded

value for the viscosity in the first case, or the time in minutes and seconds to reach the torque limit

in the second case. Pressing the

DOWN ARROW

keys will allow additional viscometer data to

be examined. Pressing any other key (except the

ENTER/AUTORANGE

key) will bring the user

back to the default (normal) viscometer display with the motor OFF. Refer to the Time Modes in

Section IV.3.