Agilent Technologies 6850 Series II User Information page 119

Changing an auxiliary channel frit
Warning The oven exhaust can be hot enough to cause burns. The oven exhaust duct is
near the auxiliary flow module. Turn off the oven and allow it to cool before
beginning this procedure.
1.
Warning If using hydrogen gas, turn it off at its source before performing this procedure.
2.
3.
4.
Aux 5
5.
6.
7.
Released: March 2004
Load the SERVICE method or reset the oven temperature to OFF or turn
the main power switch off.
Turn any gases used by the auxiliary EPC module off at their sources.
Locate the block that connects the three gas outlet tubes for the auxiliary
channels to the EPC module.
Remove the screw that holds the block to the EPC module. Pull the block
free of the module and rotate it so that the frits are on top.
Aux 4
Pull the frit to be changed out of the block. Also remove the O-ring that
seals it.
Place an O-ring on the new frit. Place the O-ring/frit combination in the
block.
Reconnect the block to the pneumatics module. Tighten the screw firmly.
6850 Series II GC User Information
Changeable
gas restrictions
Aux 3
Aux 3
Aux 4
Aux 5
Gas outlets
Routine Maintenance: General
Maintaining the auxiliary EPC module
page 119 of 256