Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-49
Replacing or Refitting the Nebulizer and Spray Chamber
Before reconnecting the gas hoses, reattach the nebulizer and spray chamber.
Replace these components if they are cracked or broken.
To refit the nebulizer and spray chamber, complete the following steps:
1 Fit the end cap onto the spray chamber.
See Figure 44. Push the end cap onto the spray chamber until there is a
snug fit and the makeup gas fitting is perpendicular to the ball joint fitting.
Make sure that the O- rings in the end cap make a gas- tight seal with the
outer wall of the spray chamber.
Figure 57 End Cap Orientation (example: Babington Nebulizer)
2 Fit the spray chamber into the base of the spray chamber chiller.
Place the spray chamber into the mounting block applying slight pressure
until you feel the drain O- ring make a good seal and the spray chamber is
seated in the mounting block (Figure 44). Tighten the upper side block with
the two screws.
NOTE
The carrier gas and the makeup gas tubing must be connected to the nebulizer and the end
cap so that they are positioned vertically. If the gas lines are positioned lower than the
sample inlet or spray chamber drain and the argon gas flow is interrupted; the sample liquid
may flow back into the gas lines. This could result in damage to the AFMC gas module.
WARNING
Make sure the spray chamber makes a good seal with the drain O-ring, especially
when using organic solvents. Organic solvent leaks may present a fire hazard.
If there is a crevice between the upper block and the lower block, the spray chamber
cannot maintain a uniform inside temperature. This may cause poor system
performance.