The intuitive design ensures it can be quickly and easily maintained, only requiring regular lubrication.

The system controls three closed-loop axes:

Axial load/displacement

Back pressure up to 1000 kPa

Cell pressure up to 1000 kPa

The base system includes:

Reaction frame

High performance motorized actuator, 15 kN capacity, backlash free and noiseless

sophisticated PID closed-loop control, ensuring load is reached fast, smoothly and accurately and then maintained with high level of accuracy. The submersible load cell delivers high accuracy from the lowest values

Robust 2-columns construction, stiff and compact

Electromechanical vertical load application

Data acquisition, process and control

It is linked to the PC via LAN/Ethernet link (1 Gbit/s) and comes with 16 transducer ports (real resolution 16 bit). The CDC manages up to 3 closed loop axes (axial load/displacement, cell and back pressure) with an effective loop rate of 10 kHz and performs the test completely automatically including the on/off valves for the drainage line and for the air supply to the triaxial cell. 

PID control

Recently added features include manual and automatic amplitude control which compensate for small changes that may occupr in the system during cycling, ensuring that the required peaks are consistently reached. An extremely efficient algorithm with larger gain ranges gives enhanced sensitivity, making it easier to tune the system and achieving a more accurate wave shapes. The improved tuning panel, with its more user-friendly interface, provides all the tools necessary to optimize the system control during static and cyclic test stages. 

Main Features:

Capability to perform Static (effective stress and stress path), Dynamic and Unsaturated soil triaxial tests

Maximum dynamic load: 15 kN

Maximum static load: 10 kN

Electromechanical Servo actuation, no need of compressed air or hydraulic power supply for the vertical force 

Complete automation of all test stages using an high sensitivity closed loop PID feedback

Options available for bender elements testing and for local strain transducers

Standard and user defined wave shapes which can mimic the real in situ measurements (earthquakes)

Triple-axes closed loop control of axial load/displacement, cell and back pressure

Automatic compensation of cell/back pressure during dynamic stage

Operating frequency more than 10 Hz (depending on test conditions)

Manual and automatic emergency shut off function

Multitasking, user-friendly Windows-based software pre-installed on the PC

Extra-accurate transducers calibration adopting linear or polynomial regression or multi-coefficient linearization

Test set-up by unique programmable multi-stage procedure. When a test is running, it is possible to access all parameters to expand and modify the stages as per the response of the specimen.

Technical Specifications:

Maximum dynamic load: 15 kN

Maximum static load: 10 kN

Max sample diameter: 100 mm

Maximum confining pressure: 1000 kPa

Maximum back pressure: 1000 kPa

Maximum vertical travel: 50 mm (different travels available on request)

Maximum testing frequency: more than 10 Hz (depending on testing conditions)

Volume change measurement: 100 cc volume change device with automatic flow inversion

Input channels: 16 - Real resolution 16 bits

Close loop control frequency: 10 kHz

Voltage:  208-230 V, 50-60 Hz, 1 ph  or  110 V, 60 Hz, 1 ph.