5 Maintenance
Nebulizer
Agilent 6475 Triple Quad LC/MS System User Guide 75
12 Gently slide and rotate the 40 x Magnifier into or out of the Nebulizer
Adjustment Fixture to focus the magnifier on the end of the nebulizer nozzle
and needle. For the APCI nebulizer, if needed, remove the pocket clip to focus
properly.
Refer to Table 2 for correct needle position.
Adjusting or replacing the nebulizer needed
Perform this procedure if you have the G1960-67470 Nebulizer Adjustment Kit.
Perform this project if there is increased LC back pressure, off-axis spraying,
dripping from the nebulizer, or when the reference nebulizer needle is not
spraying.
Tools needed:
• Nebulizer Adjustment Fixture
• Clean powder-free nitrile gloves
• T6 Torx driver
• 1/4-inch x 5/16-inch open-end wrench (Quantity: 2)
Parts needed:
• Replacement needed kit
To adjust or replace the nebulizer,
1 Put on clean powder-free nitrile gloves.
2 Determine the nebulizer holder type.
3 Install the nebulizer in the Nebulizer Adjustment Fixture.
4 Loosen the locknut next to the zero-dead-volume (ZDV) union.
5 Remove the union from the nebulizer needle holder.
6 Remove the union lock nut from the nebulizer.
Table 2 Correct needle position
Nebulizer Distance
Microflow Nebulizer Assembly 0.003 inch
ES Tested Nebulizer 0.000 (flush)
Tested ESI Nebulizer Assembly (older style) 0.003 inch
Tested APCI Nebulizer Assembly 0.000 (flush)
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