Stage 2: Sample Transfer - Agilent Technologies 6890 Series Service Manual

Stage 2: Sample transfer

When solvent venting ends, the solenoid valve closes and the inlet heats to
the final temperature. The sample transfers onto the capillary column.
Column head
pressure
control loop
Flow
limiting
frit
PTV thermocouple PCB
Figure 240-5
Jun 2001
Programmed Temperature Vaporization Inlet (PTV)
Split SPR
vent vent
SPR
PS
Solenoid
PV2
valve closed
FS
PV1
Solvent vent mode flow control diagram: sample transfer
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Solvent vent mode
Septum
holder
Trap
Cryo
valve
240
To detector
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