Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-147
2 Clean the anode assembly and the inside of the cathode tube
Polish the bar of the anode assembly, the gap between the shield disk and
the striker 2, and the inside of the cathode tube with 400 grade polishing
paper (Figure 124).
Figure 124 Anode Assembly (left), Cathode Tube and Cathode Plate (right)
3 Wash and rinse each of the parts.
Wash the polished parts with plenty of pure water. Wash the anode
assembly, the cathode tube, the cathode plate, and the body tube in a 2%
detergent solution. After washing, ultrasonic for 5 minutes in pure water.
Wash these parts with plenty of pure water. Soak these parts in pure water
and ultrasonic for an additional 5 minutes.
4 Dry the parts.
Allow the parts to air dry on a laboratory tissue. Let them dry by
evaporation; do not wipe them dry.
5
Maintain the gap between the shield disk and the striker.
Ensure the gap between the shield disk and the striker is 0.25 +/- 0.1 mm.
6 Reassemble the body tube.
Refer to the Figure 123. To fit the anode and cathode in the body tube,
complete the following steps:
Anode
Shield Disk
Striker 1
Guard Ring
Polish
Striker 2
Cathode Tube
Polish inside Tube
Cathode Plate
CAUTION
Failure to maintain the gap between the shield disk and striker will negatively affect the
performance of the gauge.