Brookfield DV3T Rheometer - Manual (Page 35)

Brookfield Engineering Labs., Inc. Page 35 Manual No. M13-2100
TIP: An End Condition of zero Time can be useful when measuring a new material.
During the test, the speed can be changed without ending and then rerunning
the test (see Section III.10). This method can allow you to quickly evaluate the
spindle selection to determine the best speeds for testing.
# of Points: The test will complete when the specified number of data points has been collected.
Data is collected according to the Data Collection setting (see Section III.6). The
range of data points is: 1 – 9,999.
# of Revolutions: The test will complete when the specified number of revolutions of the spindle
has occurred. Data is collected according to the Data Collection setting (see
Section III.6). The range for number of revolutions is: 1 – 9,999.
Torque: The test will complete when the specified Torque value is measured. Data is collected
according to the Data Collection setting (see Section III.6). The range of values for
the measured Torque is: -10.0 – 100.0.
Viscosity: The test will complete when the specified Viscosity value is measured. Data is
collected according to the Data Collection setting (see Section III.6). The range of
measured Viscosity is 0 – 10,000,000,000 cP.
Note: The Viscosity End Condition should be selected in consideration of the Range
provided by the spindle and speed selected. Check the Range value by selecting
Spindle in Configure Viscosity Test. If you choose a Viscosity End Condition
greater than the Range of the spindle and speed settings, then the value shown in
the End Condition field will be EEEE. In this case, the end condition will never be
achieved.
Temperature: The test will complete when the specified Temperature value is measured to
within the indicated Tolerance. The Tolerance specifies how close the measured
temperature should be to the specified temperature value to consider the target
reached. Temperature is measured through the use of a connected Brookfield
temperature probe (DVP-94Y, CPA-44ZPY cup, SC4-XXRPY chamber). Data
is collected according to the Data Collection setting (see Section III.6).
Temperature: -100 – 300 C
Tolerance: 0.0 – 9.9 C
TIP: A small tolerance value will require a much longer time to reach the
End Condition.
TIP: Consider using a larger Tolerance value for the End Condition and
then use a second step for thermal equilibrium (End Condition Time).
This two step method can reduce the variability in test time caused by
variations in temperature sensors.
III.9 Additional Test Parameters
The Configure Viscosity Test screen includes a More/Less Bar. When pressed, the More Bar will
present several additional Test Parameters including: QC Limits, Instructions, Reports, and Density.
These parameters are always available and active regardless of the position of the More / Less Bar.
QC Limits: Select an acceptable range for measurement results. The range may be defined
by Viscosity, Torque, Time, Temperature, or Shear Stress. The possible range for
Viscosity and Shear Stress will be defined by the spindle and speed selected. QC
Limits are a visual and audible signal to the operator during the test. The data set
does not include an indication of QC Limits violation.