TA Instruments - RSA-G2 Solids Analyzer

Manufactured by  TA Instruments
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The most advanced platform for mechanical analysis of solids.

The most advanced platform for mechanical analysis of solids.

The new RSA-G2 is the most advanced platform for mechanical analysis of solids. The separate motor and transducer technology of the RSA-G2 insures the purest mechanical data through independent control of deformation and measurement of stress. It is capable of performing the most accurate DMA measurements as well as many additional experiments including creep and recovery, stress relaxation, stress ramps, strain rate ramps, iso-strain, iso-force, fatigue, multi-wave, arbitrary waveform, and dielectric thermal analysis. With such a broad range of solid analysis techniques, the RSA-G2 is uniquely positioned to address the widest range of applications from the R&D bench to the quality control lab. This new high-performance instrument represents the fourth generation of dual head mechanical analyzers, featuring a new force convection oven for precise and accurate temperature control, extensive array of geometries to accommodate the widest range of sample shapes and stiffness, and immersion testing capability. In addition, the RSA-G2 doubles as a DETA, or Dielectric Thermal Analyzer, for stand-alone or simultaneous measurements.

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Features of RSA-G2 Solids Analyzer

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. The RSA-G2 transducer is mounted to the instrument frame by a linear slide and stepper motor allowing for independent vertical positioning. Transducer motion is via a precision ground lead screw attached to a micro-stepping motor by a rigid preloaded duplex bearing eliminating backlash. A linear optical encoder is mounted directly between the stationary frame and moving bracket for precision head positioning to an accuracy of 0.1 micron. The benefits of the independent transducer positioning are:

  • Ease of clamp installation and sample loading
  • Compensation of sample expansion/contraction during experiments
  • Additional testing capabilities to large deformations such as strain rate tests to pull samples until failure
General Specifications

There are no General Specifications available.

Additional Specifications

Minimum Force: 0.0005 N

Maximum Force: 35 N

Force Resolution: 0.00001 N

Dynamic Displacement Range: ±0.00005 to ±1.5 mm

Displacement Resolution: 1nm

Modulus Range:
103 to 3 x 1012 Pa

Modulus Precision: ± 1%

tan Δ Sensitivity: 0.0001

tan Δ Resolution: 0.00001

Frequency Range: 2 x 106 to 100 Hz

Temperature Control: Forced Convection Oven

Temperature Range: -150 to 600°C

Heating Rate: 0.1 to 60 °C/min.

Cooling Rate: 0.1 to 60 °C/min.

Isothermal Stability:

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