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5
Maintenance
Replacing the nitrogen gas filters
5 Insert the tubing through the nut and ferrule set until the tubing rests firmly
against the shoulder in the fitting.
6 Finger-tighten the nut, then use a wrench to tighten the nut 3/4 turn for
1/8-inch tubing and 1-1/4 turn for 1/4-inch tubing.
7 Wait 3 minutes for the gas pressure inside the new trap to stabilize.
8 Increase the gas source pressure to 60 psi.
9 Open the outlet fitting and purge the trap for 3 minutes.
10 Adjust the gas source pressure to a normal working level. Connect the outlet
fitting of the trap to the instrument tubing as described in step 5 and step 6.
11 Secure the trap in a vertical orientation. The length of the trap should stand
perpendicular to the floor.
Wait for at least 3 minutes to purge out any air that may have entered the
instrument tubing line. The trap is now ready for use.
Agilent Triple Quadrupole LC/MS System User Guide
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