Replacing Or Cleaning Restrictors - Agilent Technologies 6890 Series Service Manual

250 Volatiles Interface
Replacement procedures

Replacing or cleaning restrictors

WARNING Turn off the oven and the interface and allow them to cool. Turn off all flows
at the initial gas supply. Then turn off the main power switch and unplug the
power cord.
1. Remove the detector cover, the inlet fan cover, and the pneumatics top
cover.
Figure 250-17
2. Remove the Torx screws in the restrictor block and remove the restrictor.
3. Clean and/or replace. Inspect the O-rings. Replace if necessary.
4. Leak check the assembly. See Leak testing the volatiles interface.
20 of 30
Replacing the restrictor in the restrictor block
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Restrictor block
Jun 2001