Waters Xevo TQD, Overview And Maintenance Manual

Page: 197 / 250

APPI/APCI source—replacing the APPI lamp drive seals
March 14, 2014, 715004387 Rev. B 197
Fitting the new APPI lamp drive assembly O-rings
Required materials
• Chemical-resistant, powder-free gloves
• 3-mm Allen wrench
• Small Phillips (cross-head) screwdriver
• Small Pozidriv screwdriver
• 1:1 methanol/water
• Lint-free cloth
To fit the new APPI lamp drive assembly O-rings:
1. Ensure that all the grooves for the O-rings are free from dirt and hair.
Tips:
• If contamination is present, use 1:1 methanol/water, applied to the
lint-free cloth, to carefully clean the grooves.
• For the asymmetric O-ring seals, first seat the O-ring in the small
radius at the bottom of the groove. Then use a suitable tool, one with
a circular cross-section, to “roll” the remainder of the O-ring into the
groove.
2. Fit the lamp bulb sealing O-ring in the lamp aperture.
3. Fit the two new O-rings inside the lamp mounting flange.
4. Fit the new lamp mounting flange O-ring to the APPI source enclosure
side.
Warning:
To avoid personal contamination with biohazards
or toxic materials, and to avoid spreading contamination to
uncontaminated surfaces, wear clean, chemical-resistant,
powder-free gloves when working with the lamp drive
assembly.
Notice:
To avoid causing damage, take care when fitting the
APPI lamp drive assembly O-rings. Small nicks, tears, dirt,
and dust can compromise their performance, leading to rapid
deterioration in the assembly’s operation.