Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-95
3 Remove the screws that secure the upper cover of the vacuum chamber.
While waiting for the vacuum chamber pressure to equalize, use an Allen
wrench to remove the screws on the upper cover. It will take approximately
1 minute for the chamber pressure to equalize.
4 Once the vacuum chamber has equalized, remove the cover.
When the vacuum chamber pressure has equalized, the soft hissing noise of
air flowing into the chamber will stop.
5 Refit the vent valve.
Screw the vent valve back into the side of the vacuum chamber, and make
sure it is closed tightly.
6 Cover the chamber with the upper cover when you are not working
inside the vacuum chamber.
If the cover is left open, dust will enter into the vacuum chamber. To
maintain a clean vacuum environment, cover the vacuum chamber with the
upper cover when not working inside the chamber.
Sealing the Vacuum Chamber and Pumping Down the System Wear laboratory
gloves when working inside the vacuum chamber. The following procedure
explains how to seal the vacuum chamber:
1 Check and clean the O- ring.
Replace the O- ring if it is cracked or compressed. Otherwise, wipe it down
with pure water.
2 Place the O- ring in the groove in the vacuum chamber.
Place the O- ring in the upper groove so that it fits snugly.
3 Wipe off any contaminants.
Using pure water and a laboratory tissue, wipe away any contaminants
found in the vacuum chamber and on the cover.
NOTE
During longer maintenance periods such as when cleaning the ion lens, close the upper
cover on the vacuum chamber and pump down the Agilent 7500 to Standby mode.
CAUTION
Do not grease the O-ring of the vacuum chamber cover.
If you accidentally get grease on your gloves while you are working, you can potentially
contaminate the lens and other components.