Waters Xevo TQD Operator's, Overview And Maintenance Manual page 112

2. Hold the sampling cone assembly so that the cone gas nozzle handle is
oriented horizontally and at the top, and then slide the sampling cone
assembly into the ion block assembly.
Ion block assembly
3. Grasp the cone gas nozzle handle and use it to rotate the sampling cone
assembly 90 degrees, moving the handle downward from the horizontal
to the vertical position.
4. Open the source isolation valve (see
5. Close the source enclosure.
4-36 Maintenance Procedures
TP03132
Sampling cone assembly
page 4-18).