Hardware manual

4-38 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
Gently push the nebulizer into the end cap making sure that the alignment
pin fits into the slot on the back of the end cap. The tip of the nebulizer
protrudes through the front of the end cap. Adding a few drops of pure
water will ease insertion.
4 Reattach the carrier gas and makeup gas hoses.
5 Install the O- ring on the end cap.
NOTE
There is a dedicated end cap for the Babington Nebulizer. The Babington Nebulizer has an
alignment pin and the end cap has a slot into which the alignment pin fits. The Babington
Nebulizer must be rotated as it is pushed through the end cap to prevent the O-rings from
pinching. When the end cap is attached to the spray chamber, the word ‘TOP’ on the end
cap must be facing up.
NOTE
Make sure the nebulizer surface is wetting properly each time before using the Babington
Nebulizer. Proper wetting of the nebulizer surface is required for signal stability. Complete
the following steps to insure proper wetting of the nebulizer:
1 Select Instrument >>Tune from the ICP-MS Top Window.
2 Select Tune >>Sensitivity from the menu in the Tuning Window. Set the peripump
speed to 0.3 - 0.5 rps and aspirate pure water.
3 Set the Carrier gas flow to 0 L/min for 10 - 20 seconds.
4 Reset the Carrier gas flow to the value normally used.
5 Repeat the procedure 3 - 4, two to three times.