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• This software-based system is controlled from a PC running GDSLAB in MS Windows.
• Data is saved and displayed in real-time for any number of cycles.
• Sine, havesine, triangular and square waveforms .
• User defined waveforms .
• Direct closed loop of axial displacement .
• Direct closed loop of axial force.
• 12 access ports as standard.
• Interchangeable submersible load cell.
• Balanced ram to keep cell pressure constant.
• 8 channel 16bit data acquisition.
• High accuracy electromagnetic control.
• No manual tuning required.
• Performance specification conforming to the requirements of ASTM Designation D3999-91 "Standard Test Methods for the Determination of the Modulus and Dampin Properties of Soils Using the Cyclic Triaxial Apparatus".
• Interchangeable load cells (optional) to accommodate very soft to very stiff soils with ranges of 1, 2, 4, 8, 10, 16, 25, 40 and 60kN.
• Precise control of low consolidation stresses by differential pressure transducer (optional).
• All tests defined using GDSLAB control and data acquisition software. Data output is ASCII and compatible with Excel and other industry-standard spreadsheets.
• 38, 50, 70, 100mm diameter test specimens by interchangeable pedestals and triaxial extension top caps.
• Simple access for transducers, valves and pipework via built in 12 port Transducer Ring. 

• Key features	Benefits to the user
  High accuracy electro-mechanical control:	The DYNTTS system is capable of very small strain static tests through to large strain dynamic tests.
  Interchangeable load cells:	Allows user to accommodate very soft to very stiff soils with ranges of 1, 2, 4, 8, 10, 16, 25, 40 and 60kN.
  In-built balanced ram (up to 5Hz systems):	Keeps cell pressure constant during cycling, meaning a dynamic pressure controller is not required (unless dynamic cycling of cell pressure is required).
  Interchangeable pedestals and triaxial extension top caps:	Allows testing of 38, 50, 70 and 100mm diameter test specimens in the same cell.
  Direct closed loop of axial displacement & axial force:	Accurate control in either axial displacement or axial force mode.

• Actuators	High accuracy electromechanical
  Axial Force Accuracy	<0.1%
  Axial Force Resolution	16bit (i.e. <0.4N for 10kN load cell, <1.5N for 40kN load cell)
  Axial Load	10kN, 25kN, 40kN or 60kN
  Computer Interface	USB
  Data Aquisition	16bit
  Displacement Accuracy	35um
  Displacement Range	100mm
  Displacement Resolution	0.208um
  Operating Frequency (Hz)	2Hz (Standard), 5Hz, 10Hz.
  Pressure Range (Mpa)	2MPa (Standard), upgradable to 5MPa
  Resolution of Measurement and Control	10kHz control cycle
  Sample Sizes	38, 50, 70, 100mm standard (other sizes available on request i.e. 39.1, 60mm etc)

Upgrade Options:

• Temperature Controlled Testing: -10°C to +60°C, -20oC to +65oC,  -20°C to +85°C (The heater and chiller units used have a resolution of 0.01°C with a bath stability of +/-0.05°C, this stability & resolution is not necessarily reflected in the cell).
• Available in 2Hz, 5Hz or 10Hz
• Available in 10kN , 25kN, 40kN or 60kN.
• Optional upgrade to cell capable of taking 150mm samples.
• Optional cell upgrade from 2MPa (standard) to 5MPa
• Bender Element System (Vertical, Horizontal, S and P waves)
• Hall Effect local Strain
• LVDT Local Strain
• Unsaturated Testing