Waters Xevo TQD Operator's, Overview And Maintenance Manual page 6

High-temperature hazard
Warning:
assembly, can become hot. To avoid burn injuries, ensure the source
heater is turned off and the ion block is cool before performing
maintenance on these components.
Xevo TQD high temperature hazard:
Hazards associated with removing an instrument from service
vi
The source ion block, located behind the source enclosure
TP03406
To avoid personal contamination with
Warning:
biohazardous, toxic, or corrosive materials, wear
chemical-resistant gloves during all phases of instrument
decontamination.
Source enclosure assembly