Waters Xevo TQ-S cronos, Overview And Maintenance Manual, Page: 74 / 175

4 Maintenance procedures
This section provides the maintenance guidelines and procedures necessary to maintain the
mass spectrometer's performance.
Keep to a maintenance schedule, and perform maintenance as required and described in this
section.
4.1 Maintenance schedule for Xevo TQ-S cronos
The following table lists periodic maintenance schedules that ensure optimum instrument
performance.
Table 4–1: Maintenance schedule
Procedure Frequency For information...
Clean the instrument case. As required. See Cleaning the instrument
case (Page 83) .
Empty the nitrogen exhaust
trap bottle. Check daily, empty as
required. See Emptying the nitrogen
exhaust trap bottle (Page 83) .
Inspect and adjust the
roughing pump oil level. Weekly. See Maintaining the rotary
backing pump's oil (Page 85) .
Clean the source components. When source components are
visibly fouled, the background
or high-peak contaminants are
unacceptably high, or
sensitivity decreases to
unacceptable levels.
See Cleaning the source
components (Page 88) .
Replace the ESI probe tip. When sensitivity decreases to
unacceptable levels, or if
blocked or damaged. See Replacing the ESI probe
tip and gasket (Page 122) .
Replace the probe assembly. When sensitivity decreases to
unacceptable levels or signal is
unstable due to inconsistent
sample flow. See: Replacing the probe
assembly (Page 120) .
Clean the APCI probe tip.
(Options using the APCI probe
adapter only.) When sensitivity decreases to
unacceptable levels or when
significant chemical
interference is present. See Cleaning the APCI probe
tip (Page 125) .
January 10, 2022, 715006200 Ver. 01 (previously released as Rev. A)
Page 74