122 5975/5977 Series MSD Operation Manual
4 General Maintenance
To Replace the Electron Multiplier Horn
The replacement EM horn part number for this Series 2 detector is stamped
on the front face of the detector.Through OpenLAB CDS, you can determine
which series detector you have without having to directly check the detector.
The detector series is displayed as “Triple Axis Series 2” or “Triple Axis
Series 1” in the detector tab of manual tune, in the detector section on the
second page of the tune report, and in the pump down window.
Materials needed
• Electron multiplier horn (Series 2 Detector G7002-80103)
• Electron multiplier horn (Series 1 Detector G3170-80103)
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Pliers, long-nose (8710-1094)
Procedure
1 Vent the MS. (See“Vent the MSD” on page 77.)
2 Open the analyzer chamber. (See “To Open the Analyzer Chamber” on
page 94.)
3 Open the retaining clip (Figure 22). Lift the arm of the clip up and swing
the clip away from the electron multiplier horn.
4 Remove the electron multiplier horn.
WARNING
The analyzer, GC/MS interface, and other components in the analyzer chamber
operate at very high temperatures. Do not touch any part until you are sure it is cool.
CAUTION
Always wear clean gloves to prevent contamination when working in the analyzer
chamber.
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