Waters Micromass ZQ 2000, Руководство оператора, Страница: 94 / 133

Maintaining 94
5
• 1.5-mm hex wrench
• 6-mm hex wrench
• 5/16-in. wrench
• 7/16-in. wrench
• Capillary tube (part number 700000341, reference number M955088AD)
• Loupe
Procedure
1. Remove the two end-cover retaining screws on the ESI probe with the slotted
screwdriver.
2. Loosen the set screw on the LC PEEK union with the 1.5-mm hex wrench, and
remove the probe’s end-cover.
3. Unscrew the probe tip with the 6-mm wrench, and remove it.
4. Remove the LC union with the 5/16-inch and 7/16-inch wrenches.
5. Unscrew the coupling, and withdraw the capillary from the probe.
6. Remove the capillary and O-ring from the coupling. Discard the capillary, PTFE
liner, and ferrule assembly.
7. Use the needle-nose pliers to remove the conductive sleeve from the inner bore of
the probe assembly fitting.
8. Slide a GVF16 ferrule onto the liner tube.
9. Press the O-ring into the groove facing the short end of the coupling.
10. Slide the coupling, short end first, onto the capillary, followed by the new PTFE liner
tube and ferrule.
11. Slide a compression screw and ferrule onto a piece of 0.007-inch PEEK tubing.
Connect it to the opposite side of the LC union.
12. Press the capillary into the union until it seats.
13. Tighten the adaptor nut on the LC union so that it is snug but not tight.
14. Gently tug the capillary to make sure it remains secure.
15. Remove the PEEK tubing from the union.
16. Slide the conductive sleeve onto the capillary, then feed the capillary through the
probe.
17. Attach the coupling nut to the probe, and gently tighten it with the 7/16-inch wrench.
18. Replace the probe tip, then screw down until a 0.5-mm section of the capillary
protrudes from its end ( Figure 5-16 ). Use the loupe, provided in the Startup Kit, to
ascertain its length.