Fluke Calibration 4322-SYS-NAVAIR, Руководство по обслуживанию

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Theory of Operation
Intensifier
2
2-17
Intensifier
The Pressure Intensifier (the Intensifier) is an electric pressure booster system that can
boost a gas pressure (nitrogen) supply of (500 to 2,000) psig up to 10,000 psig.
Note
The Intensifier requires at least 500 psi from the Nitrogen Cylinder to boost
pressure. If the Intensifier detects that not enough supply pressure is
available, the Intensifier stops pressure generation and flashes the

LED until supply pressure is increased.
As shown in Figure 2-7, the front panel shows a schematic of the internal pressure line
routing. This helps visually identify how pressure can be vented and isolated with the
VENT and ISOLATION valves. This is helpful to quickly connect and disconnect the
OUTPUT QC fittings and to troubleshoot the system if a leak is suspected (see “Pressure
Generation and Leak Test” in Chapter 5). Refer to the 4322 Operators Manual for a
description of each item on the front panel along with venting and isolation instructions.
Set Pressure and Generation
When a set pressure is selected, an electronically controlled servo motor drives a four
piston, mechanical boost pump. The rate of pressure accumulation is dependent on the
supply pressure, and the motor speed and test volume. The higher the supply pressure, the
faster the pressure generates. Pressure generated by the boost pump is contained in a 15
cc internal accumulator and in the system pressure lines.
An electrical pressure sensor monitors and measures the pressure in the accumulator and
transmits pressure measurement values to the electronic motor controller. The internal
pressure is shown on a gauge on the front panel.
As the measured pressure in the accumulator approaches the selected pressure value, the
Intensifier decreases the rate of pressure generation and changes the speed of the motor as
necessary to hold the selected pressure in the system (referred to as “Pressure on
Demand”).
Notes
Once stable, the Intensifier boost pressure is typically 5% to 8 % higher
than the set pressure requested. This feature allows the set pressure to be
equal to the maximum pressure required for calibration.
The Intensifier is not made to store pressure when not in operation. After

is pushed, pressure slowly bleeds from the accumulator.
Pressure On-Demand
The Intensifier continuously supplies the pressure selected until

is pushed. This
makes sure that the Controller has sufficient pressure available to complete the UUT
calibration. The Intensifier can boost supply pressures as low as 500 psi, but the rate of
generation is slower with lower supply pressures. This is most noticeable when test
volumes (UUT + tubing) are larger. If the Intensifier detects that not enough supply
pressure is available, the Intensifier stops pressure generation and flashes the

LED
until supply pressure is increased.