Agilent Technologies 5975T LTM GC/MSD, Troubleshooting And Maintenance Manual

Page: 151 / 270

General Maintenance
10
Troubleshooting and Maintenance Guide 151
To Reinstall a Filament
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 Install the new filament ( Figure 16 ).
2 Remove the screw holding the filament to the ion source
body.
3
Slide off the filament assembly.
4
Orient the assembly so that the filament is next to the ion
source body.
5 Replace the screw to the ion source body.
6 After installing the filament, verify that it is not grounded to
source body.
7
Reinstall the ion source. See the “To Reinstall the EI Ion
Source” on page 148.
8 Close the analyzer chamber.
9 Pump down the MSD.
10 Autotune the MSD.
11 In the
Edit Parameters
dialog box (
Instrument/Edit MS Tune
Parameters ), select the other filament.
12
Autotune the MSD again.
13
Select and use the filament that gives the best results.
If you decide to use the first filament, run Autotune again to
make sure the tune parameters are compatible with the
filament.
14 Select
Save Tune Parameters
from the
File
menu.
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