End Of Cycle And Vial Recovery - Agilent Technologies G1289 Operating Manual

Introduction to Headspace and to the 7694 Headspace Sampler
Principles of Operation
Carrier
gas flow
Auxiliary gas
flow for vial
pressurization
Open
Closed
Carrier gas
Auxiliary gas
Figure 7. Injection. S1 and S2 are closed.

End of Cycle and Vial Recovery

The sample vial is lowered back into the carousel. For models with a vial tray,
the carousel rotates and the robotic arm returns the vial to the tray. The vent
valve opens to purge the vent line. The sampler returns to the standby
configuration.
18
Mass flow
controller
Pressure
transducer
Pressure
Flow
regulator
restrictor
Needle
Headspace
vial
Pressure
Vent
transducer
S2
S1
6
5
1
2
3
4
Sample
loop
To GC