Hardware manual

4-46 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Removing the PFA Concentric Nebulizer
1 Loosen the union connector which connects the carrier gas tube and
remove the tube.
2 Remove the nebulizer.
Loosen the nebulizer holder nut and gently pull the nebulizer out of the end
cap while gently twisting it. Take care not to touch the nebulizer tip against
the inside wall of the end cap.
3 When removing the nebulizer, also remove the end cap and inspect the
O- rings between the end cap and spray chamber for deterioration or
damage.
To clean the end cap, take out the 2 nebulizer O- rings with tweezers from
the hole where the nebulizer holder nut for the nebulizer fits in.
Wash the O- rings with pure water. Replace if needed.
Installing the PFA Concentric Nebulizer
1 Insert the nebulizer into the end cap.
Replace the two O- rings in the hole in the center of the end cap. Install the
nebulizer holder nut on to the end cap first. At this time, do not tighten it.
Insert the nebulizer through the nebulizer holder nut and then insert the
nebulizer into the O- rings by gently applying pressure and twisting the
nebulizer. Lubricating the nebulizer and O- rings with pure water helps the
nebulizer slide into the O- rings. Insert the nebulizer into the end cap until
the tip of the nebulizer is flush with the inside surface of the end cap.
Position the carrier gas arm of the nebulizer so that it points approximately
as shown in (Figure 56). The tip of the nebulizer should be positioned as
shown in figure 4- 30.
2 Tighten the nebulizer holder nut so that it is finger tight.
3 Install the O- ring in the spray chamber side of the end cap.
NOTE
Do not install the nebulizer together with the nebulizer holder nut to the end cap. This may
damage the screw of nebulizer holder nut.