GEOTAC is proud to introduce the DigiFlow system for Automated Pressure Volume Actuators. DigiFlow are computer controlled flow pumps used for accurate control of fluid pressures or flow rates. Each DigiFlow actuator incorporates a digital DC servo motor, four channels of 22 bit analog data acquisition, and a precision pressure sensor. DigiFlow is capable of closed loop control of pressure (up to 2100kPa) or flow rates (ranging from 0.000025 to 25 mL/min).
DigiFlow Software guides the operator through the following test stages:
- SEATING – automatically adjusts cell pressure to maintain specimen volume.
- BACK PRESSURE – options for ramp, step or a gradual increase in back pressure based on pore stiffness (dP/dV) and automated measurement of B coefficient.
- CONSOLIDATION – isotropic consolidation via pressure steps or ramps, including unload-reload cycles.
- PERMEATION – options include volume or pressure controlled flow regimes.