Brookfield DV-III Rheometer User Manual

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The starting screen is the main screen display (Figure 6). Pressing the

SELECT SPDL

key causes

the cursor to blink under the field for the first number of the Spindle Entry Code (Figure 7).

Figure 7

Enter the two digit code for the spindle you intend to use. Spindle Entry Code numbers are found
in Appendix D. Pressing the

SELECT SPDL

key once more accepts the spindle entered. If the

spindle number entered was not valid, an error message will be momentarily displayed and you will
have to re-enter your spindle selection.

II.3 Non-Programmed Viscosity Measurements

Often, a viscosity measurement at only one or two rotational speeds is required. The DV-III may
be run where speed is entered and the Viscosity, Torque %, Shear Stress or Shear rate values are read
from the display. After the DV-III has been leveled and the autozero procedure described earlier
has been done, the spindle is attached, and the test fluid is in the proper position. The procedure is:

1) Insure that the correct spindle number is shown at the end of the first line on the display. If

the number shown is not for the spindle you are using, change to the correct spindle number
using the procedure in the previous section Spindle Entry.

2) Insure the motor is on. If the first line of the display reads MOTOR: OFF, press the

MOTOR

ON/OFF

key and the display will show RPM: 0.0.

3) Enter the required speed by pressing the appropriate numeric keys. Figure 8 shows 11 rpm

has been entered.

Figure 8

4) Press the

key to accept the speed and start the motor.

5) Viscosity, % Torque, Shear Rate and Shear Stress values are alternately displayed by

pressing the

SELECT DISP

key to scroll through the values. Figure 8 shows the display for

% torque. To run other speeds, repeat Steps 3 and 4.

6) Stop the motor by either pressing the

MOTOR ON/OFF

key, or by setting the motor speed to

zero (0) RPM as per steps 3 and 4 above.

Note: The data points taken at these speeds are not saved in the Rheometer memory. When in

Program mode, as explained in the next section, the data points are saved.