CI Maintenance 6
5975 Series MSD Operation Manual for MassHunter 173
To Replace a Filament in a CI Source
Materials needed
• Filament assembly (G2590-60053)
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Hex ball driver, 1.5-mm (8710-1570)
Procedure
1 Vent the MSD. See “To Vent the MSD” on page 85.
2 Open the analyzer chamber. See “To Open the Analyzer Chamber” on
page 88.
3 Remove the ion source. See “To Remove the CI Source” on page 165.
4 Remove the gold plated screw and washer for the filament.
5 Secure the new filament with the gold plated screw and washer.
6 After installing the filament, verify that it is not grounded to source body.
7 Install the ion source. See “To Install the CI Ion Source” on page 162.
8 Close the analyzer chamber. See “To Close the Analyzer Chamber” on
page 91.
9 Pump down the MSD. See “To Pump Down the MSD in EI Mode” on
page 95.
10 Perform a PCI autotune with methane. See “To Perform a PCI Autotune
(Methane Only)” on page 124.
11 Select Save Tune Parameters from the File menu.
WARNING
The analyzer operates at high temperatures. Do not touch any part until you are sure
it is cool.
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