Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 219 / 248

Connecting the Edwards oil-free roughing pump B-9
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.
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.
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 page B-10 ).
Caution:
To avoid gas leaks, use the sharp knife to cut the PVC
exhaust tubing squarely (that is, perpendicular to its horizontal
axis).
Caution:
The instrument requires two separate exhaust systems:
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 B-12 .