Waters Xevo G2 QTof, Operator'S, Overview And Maintenance Manual, Page: 221 / 248

Connecting to the nitrogen gas supply B-11
To connect the nitrogen gas supply:
1. Connect one free end of the 6-mm PTFE tubing to the nitrogen inlet port
on the rear of the instrument.
Nitrogen and collision cell gas inlet, and vacuum connectors:
2. Attach a nitrogen regulator to the nitrogen supply.
Requirement:
The nitrogen must be dry and oil-free, with a purity of at
least 95%.
3. Connect the free end of the 6-mm PTFE tubing to the nitrogen regulator.
4. Set the nitrogen regulator to 700 kPa (7 bar, 100 psi).
5. Ensure that there are no gas leaks at any of the nitrogen gas supply
fittings.
Warning:
The 6-mm (¼-in) PTFE tubing must not be cut to size; use the
complete 5-m (16-ft) length as supplied.
Vacuum
Nitrogen exhaust Nitrogen inlet
Collision cell gas inlet Pilot valve port