5 Maintenance
Adjusting or replacing the nebulizer needle
Agilent Triple Quadrupole LC/MS System User Guide 112
Do not bend the needle as you slide it into the ferrule. The needle is fragile. A
bent needle results in poor alignment with the nebulizer body.
13 Push the needle into the ferrule until the needle is slightly visible flush with the
ferrule.
14 Reinstall the locknut and the union. Hand-tighten the union.
15 Hold the needle holder steady with a 3-mm open-end wrench or 1/4-inch x
5/16-inch open-end wrench, depending on your nebulizer holder style.
16 Tighten the union one-half to three quarters of a turn, or until an audible
squeak is heard. The ferrule is now compressed.
17 Pull carefully on the needle to ensure the needle is held firmly in place.
18 Insert the needle into the nebulizer shaft.
19 Adjust the electrospray needle position before reinstalling the nebulizer in the
spray chamber.
20 Tighten the fastener (T6 Torx screw) that secures the needle holder in place.
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