MTS Model 286-30 Pore Pressure Intensifier - Manual (Page 39)

Operating Procedures
286.30 Pressure Intensifier Operation 39
Heating the Triaxial Cell
Some users choose to heat the triaxial cell before applying test pressures to the
cell. Others apply test pressures while the cell is heating. In either case, the PPI
must be operated in pressure control mode during the heating process. Also, the
Pore Fluid Output valve on the PPI’s front panel should be closed to prevent hot
fluid from entering and damaging the reservoir.
Pressure inside the triaxial cell could reach high levels while the cell is
being heated.
This could cause personal injury or death or damage to the equipment or
specimen.
Always operate the PPI in pressure control mode during the heating process, as
described in
“Pressurizing and Depressurizing the Pore Fluid” on page 40.
The process of heating the triaxial cell is described as a step in “Pressurizing and
Depressurizing the Pore Fluid” on page 40.
Important Be familiar with the warning and cautions pertaining to heating fluid
within the triaxial cell. See
“High Temperature Precaution” on page
22 and “Effects of Thermal Expansion of Pore Fluid” on page 26.
WARNING