326 Maintaining Your GC
17 Maintaining the Aux EPC
Installing or Replacing Frits in the Aux EPC
To install or replace a frit in the Aux EPC block:
1 Gather the following:
• T- 10 Torx screwdriver
• Appropriate O- ring and frit
• Tweezers
2 Turn off the gas supply to the channel.
3 Select the appropriate frit. For information on selecting
auxiliary channel frits, refer to the 7890 Series Advanced
User Guide and “Consumables and Parts for the Aux
EPC”.
4 Loosen the captured screw for the channel that you want
to change.
5 Lift up the pneumatic tubing block. Remove the frit and
O- ring using the tweezers. Be careful to avoid scratching
the metal surfaces.
6 Place a new O- ring on the new frit and press it down
into the block.
7 Place the pneumatic tubing block on the new frit and
tighten the captured screw firmly.
8 Restore the gas supply.
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