Agilent Technologies 9191610, User Manual

Page: 76 / 98

5 Technical Information
Inlet Flange Connection
76/98 VacIon Plus 300 pumps User Manual / 87-900-103-01 (H)
Inlet Flange Connection
The pump should be mounted allowing a sufficient clearance for
installation and removal of the high voltage connector.
The pump should be kept sealed with its pinch-off tubulation until it
is ready for attachment to the vacuum system. This avoids
accumulation of dust and other undesirable materials. Before
breaking the pinch-off seal, 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.
CAUTION!
Do not open the pinch off-seal with a saw or grinder. These methods will cause
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.
Unscrew the main flange bolts and lift the blank flange with the help
of a bolt screwed into the available threaded hole. Remove the
ConFlat flange and the copper gasket plate. Some particles of copper
oxide may adhere to the outer edge of the flange gasket. Be careful
not to allow them or any other foreign materials to fall into the pump.