Appi/Apci Source-Cleaning The Lamp Window - Waters Xevo TQ-S Operator's, Overview And Maintenance Manual

APPI/APCI source—cleaning the lamp window
The transmission of the high-energy photons responsible for APPI relies on
the cleanliness of the magnesium fluoride lamp window. Clean the window to
keep the surface clear of contamination, and thus avoid reduced sensitivity.
Required materials
• Chemical-resistant, powder-free gloves
• Lint-free cloth
• Methanol or Isopropanol
To clean the lamp window:
1. Prepare the instrument for working on the source (see
Warning:
burn injuries, take great care while working with these
components.
Warning:
APPI lamp is extinguished before carrying out this procedure.
2. Pull the source enclosure release (located at the bottom, right-hand side)
outwards, and swing open the enclosure
3. Use methanol or isopropyl alcohol, applied to the lint-free cloth, to
carefully clean the lamp window.
4. Close the source enclosure.
5. Slide closed the instrument's source interface door.
The probe, source, and lamp bulb can be hot. To avoid
To avoid eye injury from UV radiation, ensure that the
APPI/APCI source—cleaning the lamp window 4-113
page 4-8).