MTS Model 286-30 Pore Pressure Intensifier - Manual (Page 37)

Operating Procedures
286.30 Pressure Intensifier Operation 37
Note Perform step 6 only if the pressure intensifier reaches the end of its travel
while bubbles are still being observed entering the reservoir.
6. If the pressure intensifier’s piston travels to the end of its stroke before a
bubble-free flow of fluid is observed entering the reservoir, it will be
necessary to stroke the actuator again to achieve the desired results. Do the
following:
A. Reduce the command applied to the pressure controller until the
pressure variable indicates approximately zero pressure.
B. Open the Intensifier Fill valve.
C. Close the Pore Fluid Input valve.
D. Reduce the command applied to the pressure controller further (it may
have to go slightly negative) until the pressure intensifier’s piston
returns to (approximately) the 10% displacement position (watch the
displacement variable).
E. Close the Intensifier Fill valve.
F. Repeat steps 4 and 5.