5-4 Maintenance Procedures
Replace the APCI probe
capillary.
When sensitivity
decreases to
unacceptable levels or
sample flow is
inconsistent.
See page 5-62.
Clean or replace the corona
pin (APCI and ESCi modes).
When the corona pin is
corroded or black, or
the sensitivity
decreases to
unacceptable levels.
See page 5-71.
Replace the APCI probe
heater.
If the heater fails when
the instrument is
pumped down
(evacuated).
See page 5-72.
Replace the ion block heater
cartridge.
If the heater fails to
heat when the
instrument is pumped
down (evacuated).
See page 5-74.
Replace the source assembly
seals.
Annually. See page 5-79.
Clean or replace the
instrument’s air filters.
Annually. See page 5-90.
Change the roughing pump
oil.
Annually. See page 5-95.
Replace the roughing pump’s
demister element.
Annually.
Tip: Applications that
contaminate the
roughing pump oil
reduce this period,
which must be
determined from
experience.
See page 5-98.
Maintenance schedule
Procedure Frequency For information...
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