Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-67
Removing the Cones
Be sure to wear gloves when handling the cones. To remove the cones,
complete the following steps:
1 Put the instrument in Standby mode.
See Chapter 3, “Startup, Shutdown and Status” in this manual.
2 Open the left cover.
3 Remove the torch box cover by loosening the two screws.
NOTE
Pure water used for cleaning is indicated as water that has been generated using the
ion-exchange method and a membrane filter, and has an electrical resistance of at least
18 MΩ.
CAUTION
The platinum skimmer cone should only be used with the brass skimmer base. This
allows the cone to operate at a lower temperature than with the standard stainless
steel skimmer base, extending the life of the cone. When fitting the brass skimmer
base, transfer the extraction lenses from the stainless steel base. For removing and
refitting the skimmer base and the extraction lens, refer to the “Removing the
Extraction Lenses” and the “Refitting the Extraction Lenses” in the section entitled
“Maintaining the Lenses”.
The nickel skimmer cone works better at higher temperatures and should always be
used with the stainless steel base.
WARNING
To avoid burns, wait 10 minutes after switching the plasma off before you open the
instrument.