Troubleshooting
6850
6850
Released: April 2004 6850 Series Gas Chromatograph Service Procedures 268
3. There is sufficient carrier gas supply pres-
sure applied to the inlet fitting of the EPC
module.
a. 80–120 psi for standard capillary EPC
systems
b. 100 to 170 psi for high-pressure
systems (20 psi > inlet pressure
setpoint)
4. The capillary column is installed and config-
ured correctly.
5. There are no restrictions in the split vent
flow path. This includes:
a. The interface between the bottom
surface of the glass inlet liner and the
gold seal
b. The interface between the outside diam-
eter of the glass inlet liner and the inter-
nal surface of the injection port body
NOTE: Usually liners designed for split-
less mode of operation will have a larger
outside diameter and should not be used
for split applications.
c. There is no buildup of condensed sample
material in the split vent line between
the injection port and the split vent trap.
d. The GC capillary inlet has the latest
design "Cartridge Trap" installed in the
split vent line and it is not plugged.
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