TA Instruments RSA-G2, Руководство пользователя

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RSA-G2 I TECHNOLOGY
The RSA-G2 Provides Independent
Measurements of Stress and Strain
When it comes to making the most accurate mechanical measurements,
two heads are better than one! The mechanical behavior of solid polymers
and other materials is described by material functions such as the modulus
or compliance. The modulus is the ratio of stress to strain and the compliance
is the ratio of strain to stress. In order to make the purest and most accurate
viscoelastic measurements, it is best to measure the fundamental parameters
of stress and strain independently. This approach, taken by the TA Instruments
RSA-G2, leads to measurements free of instrument artifacts over wide ranges
of stress, strain, and frequency.
RSA-G2 Design Advantage
At the heart of the RSA-G2 dual-head solids analyzer is the high-performance
drive motor and unique transducer. The sample is deformed from the bottom
by a direct-drive DC-Servo motor featuring all new electronic DSP control. The
force generated in the sample is measured at the top by the patented Force
Rebalance Transducer (FRT). The RSA-G2 FRT incorporates a highly sensitive
position sensor and linear motor with temperature-compensated rare-earth
magnets to ensure the most accurate force measurements. The FRT directly
measures sample force from the current required to drive the linear motor in
the transducer to maintain zero position. Both the drive motor and transducer
incorporate precision air bearings for stiff and frictionless support of linear
motion and enhanced force sensitivity. The independent force measurement
eliminates motor friction and inertia corrections and translates to the purest
force measurement available.
Transducer
Technology
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