Agilent Technologies G7035A Operation Manual page 82

3
Operating in Electron Ionization (EI) Mode
FB = Feedthrough Board
Ion source
sensor wires
Figure 14 Ion source wiring
2
3
4
5
6
82
Ion source
heater wires
Check the side plate O-ring. Ensure the O-ring has a very light coat of
Apiezon L high vacuum grease. If the O-ring is very dry, it may not seal
well. If the O-ring looks shiny, it has too much grease on it. Refer to the
5977 Series MSD Troubleshooting and Maintenance Manual for lubricating
instructions.
Close the side plate.
Reconnect the side board control cables.
Make sure the vent valve is closed.
Pump down the MSD. See
page 84.
If you are operating in CI mode, or if hydrogen or other flammable or toxic
substance is used for carrier gas, gently hand tighten the front side plate
thumbscrew.
Filament 1
(white wires
from FB)
Repeller
(red wire
from FB)
Filament 2
(black wires
from FB)
"To Pump Down the MSD in EI Mode"
Entrance lens
(blue wire
from FB)
Ion focus lens
(orange wire
from FB)
5977 Series MSD Operation Manual
on