MTS Model 286-20 Confining Pressure Intensifier - Manual (Page 15)

Overview Of Typical Confining Pressure Control
286.20 Pressure Intensifier Introduction 15
Pressure and displacement transducers in the CPI provide signals proportional to
their respective variables, enabling the external electronic controller equipment
to measure these variables and to control either the pressure produced by the CPI,
or the linear displacement of the pressure intensifiers piston relative to a fixed
reference.
While the displacement transducer output signal is proportional to the
displacement of the pressure intensifiers piston, relative to a reference point, the
electronic control equipment associated with this transducer is usually calibrated
in units of volumetric displacement, cubic inches or cubic centimeters, a function
of linear displacement multiplied by the area of the pressure intensifiers piston
rod.