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Part 1. Electronic Pneumatic Control (EPC) Flow and Pressure Control
Auxiliary channels
Procedure: Changing an auxiliary channel frit
1. Locate the block that connects the three gas outlet tubes for the auxiliary
channels to the pneumatics module.
2. Remove the screw that holds the block to the pneumatics module. Pull the
block free of the module and rotate it so that the frits are on top.
3. Pull the frit to be changed out of the block. Also remove the O-ring that seals
it.
4. Place an O-ring on the new frit. Place the O-ring/frit combination in the block.
5. Reconnect the block to the pneumatics module. Tighten the screw firmly.
Aux 5
Aux 4
Aux 3
Changeable
gas restrictions
Aux 3
Aux 4
Aux 5
Gas outlets
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