96 Agilent 6500 Series Q-TOF LC/MS Maintenance Guide
2Maintenance
To adjust the APCI nebulizer needle
Figure 41 Adjusting the needle holder
5 Tighten the locknut. Make sure this does not change the position of the 
needle. 
6 Remove the nebulizer from the adjustment fixture and reinstall it in the 
APCI spray chamber. 
7 Be very careful not to hit the tip of the nebulizer against anything. Any 
damage will have a large, negative effect on system performance. 
Record this procedure in the Maintenance Logbook.