Waters Xevo G2 QTof Operator's, Overview And Maintenance Manual page 219

3. Using an NW25 center ring, attach the flanged end of the vacuum hose
to the NW25/NW40 adaptor, and then secure the connection with an
NW25 clamp, tightening it with the 7-mm nut driver.
4. Connect the free end of the vacuum hose to the vacuum port on the mass
spectrometer's rear panel.
Caution:
exhaust tubing squarely (that is, perpendicular to its horizontal
axis).
5. Using an NW25 center ring, attach the 12.7-mm clear PVC exhaust
tubing to the roughing pump exhaust port NW25 nozzle fitting, and then
secure the connection with an NW25 clamp, tightening it with the 7-mm
nut driver.
6. Secure the exhaust tubing with a hose clamp.
Caution:
one for nitrogen, the other for the roughing pump. Your warranty
does not cover damage caused by routing exhaust lines incorrectly.
See also "Connecting the nitrogen exhaust line" on page
7. Route the open end of the exhaust tubing to a suitable exhaust vent. For
further information, see the Waters Xevo G2 QTof Site Preparation
Guide (part number 715002399).
8. Make the electrical connections to the roughing pump (see
To avoid gas leaks, use the sharp knife to cut the PVC
The instrument requires two separate exhaust systems:
Connecting the Edwards oil-free roughing pump
B-12.
page B-10).
B-9