Replacing The Electron Multiplier - Thermo Scientific TSQ 9000 Hardware Manual

1
Performing Routine Maintenance

Replacing the Electron Multiplier

Replacing the Electron Multiplier
80 TSQ 9000 Hardware Manual
The lifetime of the electron multiplier is directly related to the current that flows through it
and the amount of contamination or condensation it receives. The electron multiplier will last
longer if you:
• Maintain the best possible vacuum.
• After pumping down, allow the instrument enough time to equilibrate before you start
running samples again.
• Monitor the GC/MS for background contamination and immediately repair leaks.
• Keep tuning and detector calibration to a minimum.
To replace the electron multiplier:
Note To order a new electron multiplier, refer to the ISQ and TSQ GC-MS Spare Parts
Guide.
24. If you are using hydrogen, cool down the injector to prepare the GC for powering off. See
the GC documentation for information. After the heated zones are cooled down,
power-off the GC if you are using hydrogen..
WARNING BURN HAZARD: The injector, oven, and transfer line may be hot. Allow them
to cool to room temperature before touching them.
AVERTISSEMENT RISQUE DE BRÛLURE : l'injecteur, le four et la ligne de transfert
peuvent être chauds. Laissez-les refroidir à la température ambiante avant de les toucher.
WARNING FIRE HAZARD: 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. See the
"Hydrogen Safety Precautions"
AVERTISSEMENT RISQUE D'INCENDIE : si vous utilisez de l'hydrogène comme gaz vecteur,
vous devez refroidir et mettre hors tension le CG pour éviter l'accumulation d'hydrogène
dans le collecteur à vide. Reportez-vous aux « Précautions de sécurité relatives à
l'hydrogène » à la page xix de la préface pour plus d'informations.
1. Shut down the TSQ 9000 system using the software. See the TSQ 9000 User Guide for
more information.
on page xix of the Preface for more information.
Thermo Scientific