AR 2000 Operator's Manual
22
TA Instruments AR Rheometers
The TA Instruments AR Rheometers are fifth-generation instruments that function as either controlled-stress or
controlled-rate instruments.
The rheometers are designed to fulfill the requirements of measurement as implied by the full meaning of the
term rheology—defined as the "study of the deformation and flow of matter."
Deformation is measured in the nondestructive region of elastic or viscoelastic deformation. This can give
invaluable information concerning the microscopic interactions in the test material, as well as measuring the
shear stress/shear rate relationships at higher stresses.
In the controlled-stress technique, the stress can be applied and released at will, and the actual behavior of the
sample can be measured directly. This is not usually possible with conventional controlled-shear rate instru-
ments. In addition, most real-life situations can be simulated more accurately using controlled-stress measure-
ments.
Schematics of the
AR 2000
Rheometer
The parts of the AR 2000 are shown
in the figures in this sectiion as
follows:
Figure 2.1 shows a schematic of the
front of the rheometer.
Figure 2.2, shows the control panel.
The rear of the instrument is shown
in Figure 2.3 on the next page.
Figure 2.2
The AR 2000 Rheometer (Control Panel)
Figure 2.1
The AR 2000 Rheometer (Front)
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