Hardware manual

4-66 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Maintaining the Cones
Clean the cones when there are deposits on the orifice or the orifice is
discolored. Because of its proximity to the torch, the sampling cone needs
cleaning more frequently than the skimmer cone.
The MassHunter Workstation (or ChemStation) software can also indicate that
maintenance is needed, if you observe high background memory, sensitivity
loss, distorted peak shapes, or an interface vacuum reading higher than 5.0 x
10
2
Pa.
If the memory cannot be reduced, clean the sampling cone or skimmer cone,
or replace them with a new sampling cone or skimmer cone.
Locating Tools and Supplies
To maintain the interface cones, the following items are needed:
• Safety glasses and protective lab gloves
• Sampling cone wrench
• Skimmer wrench
• Alumina abrasive powder
• Sampling cone O- rings (P/N: G1820- 65025)
• 2% Nitric Acid bath
• Pure water
• Cotton swabs (P/N: 9300- 2574)
• Citranox (P/N: 5188- 5359)
• Magnifying lens (10x)
• Ultrasonic bath
• 2% detergent solution
• Indelible marker
CAUTION
The torch cover must be on while using the torch. This cover reduces the emission of
noise from the plasma.