Replacing A Dual Filament - Thermo Scientific TSQ 8000 Evo Hardware Manual

1
Performing Routine Maintenance

Replacing a Dual Filament

Replacing a Dual Filament
54 TSQ 8000 Evo Hardware Manual
The number of ions produced in the ion source is proportional to the filament emission
current. If the measured emission current is substantially less than the set emission current
value, or if the measured emission current is decreasing, you may need to replace the dual
filament because it has failed or is failing. Also, if one of the filaments has burned out, it may
be time to replace it.
Note See the TSQ 8000 Evo Spare Parts Guide for information about ordering a new
filament.
You can increase the life of your dual filament by:
• Setting the solvent delay so that the analyzer will not turn on while the solvent peak is
eluting.
• Not overriding the solvent delay at the beginning of a run.
• Selecting a lower emission current.
Note Click the Instrument Control button in the Xcalibur Status panel to switch
between filaments A and B.
To replace the dual filament:
1. Open the TSQ 8000 Evo Dashboard and click the Shut Down button.
WARNING BURN HAZARD: The injector, oven, and transfer line may be hot. Allow them
to cool to room temperature before touching them.
WARNING If you are using hydrogen as a carrier gas, you must cool down and shut off
the GC to prevent the buildup of hydrogen in the vacuum manifold.
2. Click the Yes button to continue the shutdown process. The heaters and turbomolecular
pump power off. Once the turbomolecular pump reaches 50% rpm, the foreline pump
powers off, and you may vent the system.
3. When the TSQ 8000 Evo system's temperatures and pumps are ready for shutdown, the
vacuum light on the front of the instrument will start blinking rapidly.
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