Figure 57. Exit Lens, S-Lens, And Ion Source Interface Cage For The Velos Pro - Thermo Scientific LTQ Series Hardware Manual

5
Maintenance
Ion Source Interface Maintenance
84 LTQ Series Hardware Manual
 To remove the exit lens and S-lens
1. Remove the ion source interface (see
2. Loosen and extend the two thumbscrews that secure the exit lens and S-lens

Figure 57. Exit lens, S-lens, and ion source interface cage for the Velos Pro

S-lens
Exit lens
3. Remove the exit lens from the S-lens and place it on the clean, lint-free work surface.
4. Grasping the two thumbscrews, carefully pull out the S-lens from the ion source interface
cage and place it on the work surface.
 To clean the exit lens and S-lens
CAUTION Do not clean the exit lens or S-lens 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 (see
Table 7 on page 55).
1. Using a magnification device, inspect the exit lens and S-lens 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. If a sonicator is not available, do the following:
a. To clean the exit lens, use a soft toothbrush with a 1% solution of Liquinox in water.
b. To clean the S-lens, use chamois-tipped swabs with a 1% solution of Liquinox in
water. To clean the areas that you cannot reach with the chamois-tip swab, use the
6000 grit MICRO-MESH polishing swabs.
3. For the exit lens, clean the bore by using the 6000 grit MICRO-MESH polishing swabs.
page 79).
Thumbscrews Ion source
interface cage
(Figure 57).
Thermo Scientific