Brookfield DV-I Prime User Manual

Page 21

Brookfield Engineering Laboratories, Inc.

Page 21

Manual No. M/07-022-D0613

II.9 Timed Modes for Viscosity Measurement

The Timed Modes

allow the viscometer user to implement Timed Stop and Time to Torque

capabilities with the DV-I PRIME Viscometer. This feature 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

(Timed Stop) or until a set torque value is attained (Time to Torque). A series of menus will ask

the user to input minutes and seconds (Timed Stop) or % torque (Time to Torque) and will then

begin timing when the user presses the

MOTOR ON/OFF

key to ON. 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 display a

screen stating that the test is complete and will also display the final recorded value for the viscosity

in the first case, and the time in minutes and seconds to reach the torque limit in the second case.

II.9.1 Set Up

1. The user must pre-select the display unit option: CGS or SI (see Section II.5).

2. The user then selects (via the

and

DOWN

arrows) the spindle speed (see Section II.3).

NOTE:

If 0.0 RPM is the selected speed setting (the default after executing

AUTOZERO

) the timed modes can be executed; however, the results will

be meaningless showing no viscosity values.

3. Next, the user selects the spindle number corresponding to the spindle attached.

4. Now, the user presses the

MOTOR ON/OFF

key to ensure that the motor is OFF. Setting

the motor to the OFF condition sets up the viscometer for executing the Timed Modes.

5. The user presses the

TIMED OPTION

key to enter either of the timed test modes. Immediately,

the following screen appears:

TIMED STOP
TIME TO TORQUE

Figure II-16

The user presses either the

DOWN ARROW

key to select the test method of choice, which

will be flashing.

II.9.2 Timed Stop

1. After pressing the

ENTER

key when in the display of Figure II-16, the user is presented

with the following screen:

TIMED STOP
SET MIN’S:00

Figure II-17