Veeco MS40 Operation And Maintenance Manual page 30

FIL ON/OFF
FIL 1/2
HELIUM/AIR
MASS 3/4
VIC Leak Detection
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Ronkonkoma, NY 11779
631.737.0900
1109-186-00 Rev. C
Filament ON/OFF. Momentary switch. When the unit is in
Service Mode, pressing this switch will toggle the active
filament on or off.
When the unit is in Standard Mode, this switch also toggles
the active filament on or off. However, whenever the unit is
in Standard Mode, the filament may be turned on only when
the high-vacuum section has been sufficiently evacuated (as
determined by the MS-40's computer).
CAUTION
As described above, in Service Mode, the spectrometer's filament
may be turned on or off at any time. In this mode, care should be
taken to make sure that the high-vacuum section has been
pumped down. If the filament is turned on when the high-
vacuum section is at or near atmosphere, the filament will
quickly burn out.
Filament 1 or 2.Momentary Switch. By pressing this switch,
the user can toggle between Filament 1 and 2. A green indicator
next to the 1 or 2 on this switch indicates that the respective
filament is working properly. If a red LED appears next to the
1 or 2 on the switch, the filament is malfunctioning.
Momentary Switch. Not active in Standard Mode. By
pressing this switch in Service Mode, the user can toggle
between air-equivalent and helium leak rate readings.
The LED next to the HELIUM or AIR labels indicates which
standard is active.
Momentary Switch. Not active in Standard Mode. By
pressing this switch in Service Mode, the user can toggle
between Mass 3 or Mass 4 helium tuning voltages. The
LED next to the 3 or 4 indicates whether Mass 3 or Mass 4
is selected.
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