Stage 3: Purge And Cleanup - Agilent Technologies 6890 Series Service Manual

240 Programmed Temperature Vaporization Inlet (PTV)
Solvent vent mode

Stage 3: Purge and cleanup

The solenoid valve opens again and the system returns to the Stage 1
configuration but with different setpoints. The PTV inlet is flushed through
the split vent.
Flow
limiting
control loop
frit
PTV thermocouple PCB
Figure 240-6
12 of 46
Split
SPR
vent
vent
SPR
PS
Total flow
Valve
PV2
open
FS
PV1
Cryo
valve
Solvent vent mode flow control diagram: purge and cleanup
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Septum
holder
Trap
To detector
Jun 2001