Brookfield DV3T Rheometer - Manual (Page 53)

Brookfield Engineering Labs., Inc. Page 53 Manual No. M13-2100
Torque Reduction
Torque Reduction is percentage change in torque value between successive data points. That
is, the material yields or begins to break down and, as a result, the measured incremental torque
begins to decrease. A value of 100% for this parameter causes the test to stop as soon as there
are no torque increases during a base time increment. Some users may wish to see a drop in
torque after the yield point. Setting this parameter to values greater than 100% allows data to
be collected after the yield point by the EZ-Yield TM software so the decrease in torque may be
more easily visualized. However, this will also affect the calculated yield stress value.
TIP: Brookfield recommends a torque reduction value of 100%.
Yield Limits
These stress values can be used as a Quality Control tool. If the resulting yield stress from a
test falls outside these limits, an appropriate message is displayed and printed with the results.
Entering zero (0) for both these parameters disables this QC feature.
Instructions
Record specific instructions to the operator. This information will be presented immediately
when the program is Run (see Figure IV-6). The operator is required to acknowledge the message
before the program will continue.
Figure IV-6
TIP: If the operator selects “Do not show this message again” within the Instructions message
box, then Instructions will no longer be displayed for any test. This condition can be
reset to allow Instructions to be displayed in the Display section of User Settings .
TIP: Instructions can be viewed during the test by selecting instructions (more/less bar) in
the View Test screen.