Waters APGC, Operator'S Manual Supplement, Page: 50 / 78

3-2 Maintenance Procedures
Maintenance schedule
The following table lists periodic maintenance schedules that ensure optimum
instrument performance.
Spare parts
Waters recommends that you replace only the parts mentioned in this
document. For spare parts details, see the Waters Quality Parts Locator on
the Waters Web site’s Services/Support page.
Maintenance schedule:
Procedure Frequency For information...
Clean the mass spectrometer
sample cone.
When sensitivity
decreases to
unacceptable levels.
See page 3-4 .
Clean or replace the corona
pin.
When the corona pin is
corroded or black, or
the sensitivity
decreases to
unacceptable levels.
See page 3-4 .
Clean the APGC ion chamber When sensitivity
decreases to
unacceptable levels.
See page 3-7 .