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3
Operating in Electron Ionization (EI) Mode
To Close the Analyzer Chamber
Materials needed
• Gloves, clean, lint-free
Procedure
1
Table 14
Wire description
Green beaded (2)
White with braided cover (2)
White (2)
Red (1)
Black (2)
Orange (1)
Blue (1)
White beaded (2)
White (2)
Brown (1)
80
•
Large (8650-0030)
•
Small (8650-0029)
Ensure all the internal analyzer electrical leads are correctly attached.
Wiring is the same for both the standard EI and CI ion sources. The
extractor EI ion source has an extra wire leading to the extractor lens.
The wiring is described in
and
Figure 14
on page 82. The term "Board" in the table refers to the
feedthrough board located next to the ion source.
Source board wiring
Table 14
and illustrated in
Attached to
Quad heater
Quad sensor
Board, center (FILAMENT-1)
Board, center left (REP)
Board, center (FILAMENT-2)
Board, top right (ION FOC)
Board, top right (ENT LENS)
Ion source heater
Ion source sensor
Extractor lens
(Extractor EI ion source only)
5977 Series MSD Operation Manual
Figure 13
on page 81
Connects to
Board, top left (HTR)
Board, top (RTD)
Filament 1 (top)
Repeller
Filament 2 (bottom)
Ion focus lens
Entrance lens
Board, bottom left (HTR)
Board, bottom (RTD)
Board, middle left
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