Purging Gas From The Oil In The Foreline Pump; Changing The Oil In A Foreline Pump - Thermo Scientific ISQ 7000 Hardware Manual

Purging Gas from the Oil in the Foreline Pump

Changing the Oil in a Foreline Pump

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19. If the GC is powered off, power it on and make sure vacuum compensation is on for the
carrier gas flowing into the mass spectrometer.
WARNING FIRE HAZARD: If you are using hydrogen, do NOT reach over the top of the
instrument to power it on. Instead, reach around the right side or go to the back of the
instrument and flip up the power switch.
AVERTISSEMENT RISQUE D'INCENDIE : si vous utilisez de l'hydrogène, ne passez PAS la
main par-dessus l'instrument pour le mettre sous tension. Passez-la plutôt par le côté droit
ou placez-vous derrière l'instrument et activez l'interrupteur d'alimentation.
20. Purge the foreline pump for 10 minutes using the gas ballast to remove excess gases from
the new oil.
Purging (or decontaminating) the oil in the foreline pump removes dissolved gases and
low-boiling-point liquids from the oil. Purge the oil if it is cloudy or discolored. You can
purge the oil without interrupting system operation.
Set the gas-ballast control to position I or II (0 means closed) to purge the oil.
CAUTION INSTRUMENT DAMAGE: While the gas is being purged, more oil vapor is
being generated. If you leave the purge open for an excessive amount of time, the pump
oil will become mist, which could damage the pump. Never purge your pump for more
than 10 minutes at a time.
ATTENTION DOMMAGES À L'INSTRUMENT : lorsque le gaz est en train d'être purgé, cela
génère davantage de vapeur d'huile. Si vous laissez la purge ouverte pendant trop longtemps,
l'huile de la pompe sera transformée en brouillard, ce qui peut endommager la pompe. Ne
purgez jamais votre pompe pendant plus de 10 minutes à la fois.
You should change the foreline pump oil every four months or after 3,000 hours of operation.
If you use ammonia as a chemical ionization reagent gas, you should change the oil every
month. Ammonia is highly corrosive and quickly damages the seals in the foreline pump.
Note For best results, change the oil while the foreline pump is still warm. Be careful, as
the oil can be very hot if the pump has been used recently.
To change the oil in the foreline pump:
Note If you are running samples, stop the acquisition before powering off the system.
21. Cool down the GC oven.
1
Performing Routine Maintenance
Maintaining the Foreline Pump
ISQ 7000 Hardware Manual 43