Brookfield R/S Coaxial Cylinder Rheometer - Manual (Page 66)

Brookfi eld Engineering Labs., Inc. Page 66 Manual No. M08-219-B1211
D.1.1 Running a Sample Using Software Control
In Measure/Analysis, click the Load Program File and select the required test method.
Center the sample on the base plate and secure in place with the clamps.
Lower the instrument head by pushing down on the “periscope handles” so that the vane enters
the sample to the required depth.
Click Start, enter the required fi le name for the results and click OK.
Enter any other details relating to the batch number, customer, operator etc. and click OK. The
measurement will start.
Standard graphing functions and results overlay procedures are covered in the Rheo 3000 software
manual and the onboard Help fi le.
D.1.2 Soft Solids Analysis Functions
Clicking on Soft Solids Analysis opens the analysis functions for soft solids testing.
The soft solids analysis functions enable the quantifi cation of properties of tested materials using
regression analyses and peak-value identifi cations:
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 defi ned in confi guration and the gradient of the stress vs. strain
curve is reported as Modulus. The regression coeffi cient, 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 defi ned in Confi guration to obtain
values for instantaneous compliance, strain and angular displacement.
Viscous Response: A regression is performed on the range defi ned in confi guration 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.
1.
2.
3.
4.
5.
Appendix D: R/S-SST+ - Soft Solid Tester
D.1 Operating the R/S-SST+ Soft Solids Tester