Waters Xevo TQD Overview And Maintenance Manual page 7

Glass-breakage hazard
Warning:
or exposure to toxic or biohazardous substances, never place
containers on top of the instrument or on its front covers.
High temperature hazard
To avoid burn injuries, ensure the source heater is turned off
Warning:
and the ion block is cool before performing maintenance on these
components. The source ion block, located behind the source enclosure
assembly, can become hot.
Xevo TQD high temperature hazard:
To avoid injuries from broken glass, falling objects,
Source enclosure assembly
TP03406
March 14, 2014, 715004387 Rev. B vii