Waters Xevo TQ MS Operator's, Overview And Maintenance Manual page 221

the connection with an NW25 clamp, using the 7-mm nut driver to
install the clamp.
7. Connect the free ends of the two lengths of vacuum hose to the two,
1-inch OD, straight, vacuum ports on the mass spectrometer's rear
panel.
8. Install 2 clamps on each hose end.
Caution:
exhaust tubing squarely (that is, perpendicular to its horizontal
axis).
9. Connect the 12.7-mm clear PVC exhaust tubing to the roughing pump oil
exhaust filter port NW25 nozzle fittingusing an NW25 center ring, and then
secure the connection with an NW25 clamp, using the 7-mm nut driver to
install the clamp.
Caution:
separate exhaust systems are required: one for nitrogen, the
other for the roughing pump. Vent the exhausts to atmosphere
through separate lines. Oil mist can seriously damage the
instrument if the nitrogen exhaust line connects with the
roughing pump exhaust line. Your warranty does not cover
damage caused by routing exhaust lines incorrectly.
10. Secure the exhaust tubing with a hose clamp.
11. Route the open end of the exhaust tubing to a suitable exhaust vent.
12. Inspect the oil level in the pump.
Caution:
not operate the pump with the oil level below 30% of the MAX
level.
See "Inspecting the Varian roughing pump oil level" on page
needed, "Adding oil to the Varian roughing pump" on page
13. Make the electrical connections to the roughing pump.
Connecting the Varian oil-filled roughing pump
To avoid gas leaks, use the sharp knife to cut the PVC
To prevent serious damage to the instrument, two
To ensure correct operation of the roughing pump, do
February 11, 2013, 71500130002 Rev. D
101, and, if
102.
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