General Maintenance 4
5975/5977 Series MSD Operation Manual 117
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 Install the EI Ion Source” on page 118.
8 Close the analyzer chamber. See “To Close the Analyzer Chamber” on
page 125.
9 Pump down the MSD. See “To Pump Down the MS” on page 79.
10 Autotune the MSD. See “To Run an Autotune” on page 74.
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 18 Changing the filament - standard source shown, Extractor source similar
Gold plated screws
and washers
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