MTS Model 286-20 Confining Pressure Intensifier - Manual (Page 37)

Operating Procedures
286.20 Pressure Intensifier Operation 37
Pressurizing and Depressurizing The Confining Fluid
This procedure describes how to pressurize and depressurize the triaxial cell and
indicates the proper time to heat and cool the triaxial cell.
Purpose of this
procedure:
This procedure describes how (and when):
A. To make sure the pressure intensifier’s piston is properly positioned for
pressurizing the triaxial cell.
B. To heat and pressurize the triaxial cell.
C. To cool and depressurize the triaxial cell at the end of the test.
Note This procedure requires that hydraulic pressure be applied to the
pressure intensifier’s servovalve to enable the pressure intensifier’s
piston to be stroked under closed loop control. Explicit instructions
cannot be provided for these steps because of the large variety of
electronic controller equipment in use. Refer to the system operation
manual.
Hydraulic power will be applied during this procedure.
Conditions that can be hazardous to life and equipment can exist on all
systems or equipment that are connected to the same hydraulic power
source.
Before turning on hydraulic power, make sure that all systems or equipment that
use the same hydraulic power source are in an appropriate condition before you
turn on hydraulic power.
Make certain no one is performing work on other systems or equipment that share
the same hydraulic power source as the CPI. If people are working on other
systems or equipment, inform them that you intend to turn on hydraulic power.
Inform other people in the vicinity that you are about to turn on hydraulic power.
WARNING