Hydromatic, Stand Alone pressure controller
Hydromatic, Stand Alone pressure controller
The stand alone Hydromatic pressure controller is a water pressure source and volume change gauge that can generate pressures up to 3500 kPa, independently from traditional compressed air source, mercury columns or dead weight devices.
It consists of an hydraulic piston driven by a ball screw and gear box mounted on a ball slide. The system is driven via a stepper motor by Automax microprocessor control system. Automax allows the pressure pump to work as an automatic stand-alone unit that can be easily moved from one triaxial system to another.
The pressure is automatically recharged when piston travel limit is reached.
Stand alone Hydromatic unit includes:
- 3500 kPa pressure transducer (used for closed loop control) connected to Automax unit.
- De airing block
- 2 solenoid on/off valves: one connected to pressure controller outlet line, one connected to triaxial cell line (for cell or back pressure)
- 8x6mm tubing for pressure controller and cell connection
- quick couplings for banded triaxial cell and Tn-Cell Plus connections
Automax unit assures important features:
- Real time reading of pressure
- Fast/slow approach to decrease/increase pressure (through 10 keypad membrane)
- Over travel limits alarm
- Programmable control to ramp and cycles of pressure versus time
- Different calibration modes (linear or polynomial)
- Different protocol of data downloading to PC via RS232 serial port (either for real time or deferred time downloading)
- Automatic piston recharge
- Ram memory with battery back-up with clock/calendar operating also when the unit is switched off
- Large monochromatic display 240x128 pixel for data recording view in real time
The system can be used for different kind of tests as saturated and unsaturated triaxial or permeability (in triaxial cell or permeability cell) and can applied to any system.