MTS Model 286-31 Transient Permeability Pore Pressure Intensifier - Manual (Page 79)

Running a Transient Permeability Flow Test
286.31 Transient Permeability Pore Pressure Intensifier Operation 79
5. Isolate the triaxial cell.
Turn the Permeability Output and Permeability Input valves to the Close
position.
6. If your triaxial cell has an upper pore pressure valve, close it.