The 2 consoles are operated independently and the failure envelope is obtained by few individual tests (single - stage) with automatic application of axial load and confining pressure at different levels. The Automatic configuration for determining the elastic modulus and strength characteristics of rock specimens under uniaxial and triaxial conditions is based on the control console for axial load.

Main Features:

Axial and horizontal stress are increased isotropically up to a defined level in automatic way

The 2 consoles are operated independently and the failure envelope is obtained by few individual tests (single - stage) with automatic application of axial load and confining pressure at different levels

Automatic performance of uniaxial and triaxial tests with individual but combined control of axial load and confining pressure

Cell pressure is maintained constant (± 1%) and axial stress is increased automatically at constant load rate up to specimen failure (single-stage).

Specifications:

Hydraulics

Dual stage pump: centrifugal low pressure for fast approach and automatic switching to radial multi-piston high pressure for loading

Maximum working pressure 650 bar

DC motor. 720 W, 50-60 Hz

Flow-sharing technology to perform loading and unloading cycles

Third and fourth frame option, active frame selection by software

Energy Saving technology to reduce power consumption and silent operation

Hardware

131.000 points effective resolution

Closed-loop P.I.D. control

1 channel for confining pressure (acquisition only)

6 channels for strain/displacement transducers (potentiometers, magneto strictive, LVDTs)

4 channels for load sensors (pressure transducers/load cells)

3 channels for strain gauges

Digital linearization of the calibration curve (multi-coefficient)

Memorization of the calibration curve enables sensors to be connected and used immediately.