Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 156 / 248

5-80 Maintenance Procedures
8. Use the 7-mm wrench to tighten the locknut against the PEEK union.
9. Perform a leak test by attaching the free end of the PEEK tubing to an
LC pump and pumping 50:50 acetonitrile/water through it, at 1 mL/min.
•
If leakage occurs, disassemble and remake the connection, and
repeat the leak test.
• If the backpressure on the LC pump is high, replace the capillary,
and repeat the leak test.
10. When no leakage occurs and the backpressure on the LC pump is
normal, disconnect the PEEK tubing from the LC pump.
11. Remove the probe inlet connector and PEEK tubing from the PEEK
union.
12. Remove the probe heater (see page 5-92 , step 2 ).
13. Carefully thread the capillary through the probe assembly.
14. Carefully push the PEEK union/UNF coupling assembly and capillary
into the probe assembly so that the locating pin on the UNF coupling is
fully engaged in the locating slot at the head of the probe assembly.
15. Fit the nebulizer adjuster knob to the PEEK union/UNF coupling
assembly.
16. Finger tighten the nebulizer adjuster knob onto the probe assembly.
17. Fit the probe gasket and end-cover to the probe assembly.
Warning:
To avoid high-pressure liquid jet spray, wear safety
goggles when performing the leak test.
UNF coupling locating pin
Probe assembly locating slot