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Inlet Flange Connection
The pump should be mounted allowing sufficient clearance for
installation and removal of the high voltage connector.
To achieve good performance of the ion pump at low vacuum
pressure, it is critical that atmospheric pollution and dust must not
enter the pump during venting. This type of contamination will not
be removed by the standard high temperature bake procedure and
may degrade ion pump performance. The pump should be kept sealed
with its pinch-off tubulation until it is ready for attachment to the
vacuum system. Before venting the pump, consult the inspection
procedure (see preceding paragraph).
Vent the ion pump by opening the pinch-off tubulation in a clean area
free from smog, dust, pollen, etc. Venting with dry nitrogen gas is
further recommended. This can be done by placing a clean
polyethylene bag over the ion pump flange. Small pumps can be
placed inside of the bag. Purge the bag with clean, dry nitrogen for
several minutes, then reach into the bag and release the internal
vacuum using pliers to open the copper tube pinch-off.
Do not open the pinch off-seal with a saw or grinder. These methods will cause
CAUTION!
metal particles to be drawn into the pump by the inrushing air as the pump is
opened.
WARNING!
The pinch-off seal is extremely sharp. Be careful when opening. Watch your
fingers.
Use appropriate procedures to maintain the clean condition of the
pump and vacuum system.
VacIon Plus 40/55/75 pumps User Manual / 87-900-105-01 (G)
Technical Information
Inlet Flange Connection
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