Brookfield R/S-SST Rheometer - Manual (Page 2)

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Operating The SST2000 Soft Solids Tester
Running a sample using software control
1. In Measure/Analysis click Load Program File and select the required test
method.
2. Centre the sample on the base plate and fix in place with the clamps.
3. Lower the instrument head by pushing down on the “periscope handles” so
that the vane enters the sample to the required depth.
4. Click Start, enter the required filename for the results and click OK.
5. Enter any other details relating to batch numbers, customer, operator etc. and
click OK.
The measurement will start.
Standard graphing functions and results overlay procedures are covered in the
Rheo2000 software manual and the onboard Help file.
Soft Solids Analysis Functions
Clicking on Soft Solids Analysis opens the analysis functions for soft solids testing.
The Soft Solids Analysis Functions enable the quantification of properties of tested
materials using regression analyses and peak-value identifications:
Yield / Modulus
The peak value within the data range is reported as Yield Point values for Stress
and Torque. The Strain and Angular Displacement at the yield point are also
reported.
A regression is performed on the range defined in Configuration and the
gradient of the stress vs. strain curve is reported as Modulus. The regression
coefficient, B, and the standard deviation, S, is also reported.
Creep
Two regressions are performed on the creep data to obtain:
Instantaneous Response: A regression is performed on the range defined in
Configuration
to obtain values for instantaneous Compliance, Strain and angular
Displacement.
Viscous Response: A regression is performed on the range defined in
Configuration to obtain Creep Viscosity. The intercept on the y axis (strain,
Displacement or Compliance) is then divided by the maximum value (last data
point) of the creep curve to obtain Elastic Index