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8
Control Panel
During a test, the computer will be continuously adjusting the pressure inside
the cell. As the pressure increases due to thermal expansion, the computer
will allow pressure to bleed. Likewise, if pressure begins to drop, the
computer will add pressure to keep it within the target range.
The
Regulator
on the control panel controls the air pressure into the pump.
This should be set between 100 – 150 PSI (690 – 1,034 kPa) as indicated on
the
Air Pressure
gauge.
Throttle Valve (Inside) -
This valve gives you tighter control over the
pressure going into the pump. Use this valve to fine-tune the pressure control
system. To access this valve, remove the panel directly to the left of the
control panel.
When operating at the lower end of the pressure range (less than 10,000
PSI / 68.95 MPa), a single cycle of the pump could add far too much pressure
to the cell. If this is the case, the throttle valve should be closed slightly.
This will reduce the pressure to the pump, which will reduce the amount of
pressure added to the cell in each pump cycle.
When operating at the higher end of the pressure range (above 10,000 PSI
/ 68.95 MPa), a single cycle may not be enough to add pressure to the cell.
In this case, open the regulator slightly to increase the air supply to the pump
and increase the pressure added to the cell in each pump cycle.
