Overpressure Relief; Electronic Pressure Sensor And Gauge - Fluke Calibration 4322-SYS-NAVAIR Service Manual

Overpressure Relief

The Intensifier is fitted with an automatic pressure relief valve that automatically and
instantaneously vents excess pressure if the pressure goes above 11,500 psi. This pressure
relief valve is a safety feature and it resets automatically once pressure has decreased to
the working range of the Intensifier. This valve is not adjustable and replacement is
necessary if it is venting pressure prematurely.

Electronic Pressure Sensor and Gauge

An electronic pressure sensor (transducer) is installed on the pressure manifold. This
transducer provides pressure measurement data to the internal circuitry that controls the
internal motor. The electronic pressure sensor must be field aligned if the pressure
generation amount is off by more than 10 % or if the Intensifier stabilizes at a pressure
less than what the Controller requires when set to an equivalent pressure. This can be
determined if the boost pressure selected does not match what the front-panel gauge
indicates after pressure has stabilized. If a new electronic pressure sensor is installed, the
new sensor must have a field alignment performed followed by a factory alignment to
store the new coefficients. See "Electronic Pressure Sensor Alignment" in Chapter 5 for
instructions.
The gauge is an independent pressure gauge that provides a front-panel indication of the
internal pressure in the system. The gauge is not connected nor does it communicate with
the pressure sensor. There is no adjustment procedure for the gauge.
Theory of Operation
Intensifier
2-19
2