8
Maintenance
Maintaining the API Source Interface
Thermo Scientific Orbitrap Fusion Series Hardware Manual 81
5. Loosen the two thumbscrews even further and use them to pull out the exit lens
(Figure 46).
Figure 46. Exit lens removed from the API source interface (Orbitrap Fusion MS)
To clean the RF lens, exit lens, MP00 RF lens, and lens L0
1. Using a magnification device, inspect the components for any lint, particulates, and
sample buildup or coatings.
2. For 10 minutes, sonicate the components in either a 50:50 solution of methanol/water or
a 1% solution of Liquinox in water.
3. If a sonicator is not available, do the following:
• To clean the RF lens, use chamois-tipped swabs with a 1% solution of Liquinox in
water. To clean the areas that you cannot reach with the swab, use the 6000 grit
MICRO-MESH polishing swabs.
• To clean the exit lens, use a soft toothbrush with a 1% solution of Liquinox in water.
4. For the exit lens, MP00 RF lens, and lens L0, use the 6000 grit MICRO-MESH
polishing swabs to clean the bore.
5. Rinse the components thoroughly with water.
6. Sonicate the components in water for 10 minutes.
7. Sonicate the components in methanol for 10 minutes.
8. Rinse the components with methanol.
Exit lens
Lead pin through the exit lens
RF lens
Lead pin socket
CAUTION Do not clean the lenses with abrasives, acidic or caustic substances, or
detergents not stated in this chapter.
IMPORTANT Always use LC/MS-grade methanol and LC/MS-grade water.
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