MTS Model 286-31 Transient Permeability Pore Pressure Intensifier - Manual (Page 33)

Purging and Filling the Fluid Lines
286.31 Transient Permeability Pore Pressure Intensifier Operation 33
2. Purge the Reference Volume 2 lines of air and fill them with fluid.
Turn the Permeability Output to the Open position.
As soon as bubble-free fluid starts coming out at the triaxial cell’s upper
pore pressure port, go on to step 3.