Ametek Davenport PET Plus User Manual page 27

Although the unit does not use mains power, it
must be connected to a good earth point to
prevent any build up of dangerous static charg-
es. Therefore, an additional earth wire must be
connected to the unit.
Note that an earth wire is not supplied with the
equipment and this has to be provided by the
user.
To operate the grinder, close the lid and fasten
with the clip then push the start knob at the front
of the unit.
When the grinder is running, check that the
pressure gauge on the left hand side of the unit
shows 80psi (5.5 Bar).
Shown: Pressure control gauge
Note that the grinder stops automatically after
30 seconds so the grinder may need restarting
during this procedure.
If the pressure gauge does not show the
correct pressure when the unit is running, pull
the orange knob downwards then rotate the
knob to achieve the correct pressure.
Push the knob upwards again after adjustment
to lock the regulator setting.
The grinder blade is driven by an air motor and
this is lubricated by an oil mist carried by the
compressed air.
A special oil lubricator is fitted to the air manifold
Shown: Check oil drop rate
assembly and this supplies oil drops into the air
flow.
When the grinder is running, view the glass tube
above the air manifold assembly and check the
speed of the oil drops.
The required speed is approximately 1 drop per
minute.
If the oil drop rate is not correct, adjust the oil
drop regulator screw, which is on top of the glass
tube.
Note that the grinder stops automatically after
30 seconds so the grinder will need restarting
Shown: Adjustment for oil drop rate
several times during this procedure.
PET Plus User Manual 27