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Stray magnetic field from flange (sheet 1 of 3)
Stray magnetic field from flange (sheet 2 of 3)
Stray magnetic field from flange (sheet 3 of 3)
VACION PLUS PUMP INSTALLATION
Inspection procedure
VacIon Plus pumps are evacuated, baked out,
sealed, and leak-checked at below 1x10
(mbar) prior to shipping.
The following information and procedures can be
used to establish the vacuum integrity of a VacIon
Plus pump before installation.
Visual inspection
Inspect the pump and magnet for physical damage
which may have occurred during shipment. Exam-
ine, in particular, the brazed joints on the high volt-
age feedthrough.
Inspect the pinch-off seal. If it is open, the pump is
at atmospheric pressure.
The pinch-off seal is extremely sharp. Be careful.
A VacIon Plus pump that has been exposed to at-
mosphere during shipment, or while in storage, will
operate properly if it has otherwise not been dam-
aged.
The pump is not harmed by such exposure, al-
though it is good practice to keep it under vacuum
when not in use to exclude dust and the accumula-
tion of water vapour from the environment.
Vacuum evaluation
To determine the vacuum level of the new pump
before air releasing it:
1. Connect the pump to the control unit as di-
rected in the instruction manual of the control
unit.
The high voltage which is present in the ion pump
when it is powered from the power unit can cause
severe injury or death.
Be sure the garter spring is mounted on the high
voltage feedthrough because the ground connec-
tion is brought from the control unit to the pump
body through the garter spring. An additional
safety ground connection for the pump body is
made through the fixing screws of the H.V. cable
connector.
15
TECHNICAL INFORMATION
-9
WARNING!
WARNING!
87-900-063-01(C)
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