General Maintenance 5
5975 Series MSD Operation Manual for MassHunter 153
5 Secure the new filament(s) with the gold plated screw and washer.
6 After installing the filament, verify that it is not grounded to the source body.
7 Install the ion source. See “To Reinstall the EI Ion Source” on page 154.
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 Autotune the MSD. See “To Tune the MSD in EI Mode” on page 77.
11 In the Manual Tune dialog, the Filament parameter allows you to enter 1 or
2 for the filament number. Whichever number was present during the
previous autotune enter the other filament number.
12 Autotune the MSD again.
13 Enter the filament number that gave the best results.
If you decide to use the first filament number, run Autotune again to make
sure the tune parameters are compatible with the filament.
14 Select Save Tune Parameters from the File menu.
Figure 29 Changing the filament
Gold plated screws
and washers
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