How the 7697A Headspace Sampler Works 2
Advanced Operation 17
Figure 5 Basic 7697A HS vial process flow, 111 vial model
The major differences in processing between the two models
are:
• Tray robotic arm moves vials to and from loading stations
• 111 vial model uses a 12 vial oven that can process more
than one vial at a time
• 111 vial model provides shaking
Prepare sample.
Cap sample in vial.
Place vial in tray.
Lift vial and move to
shutter.
Equilibrate (temperature
and shaking)
Lift vial onto sample
probe.
Pressurize vial.
Perform dynamic
leak test.
Remove vial from
probe.
Lower vial into
carousel.
User tasks
Open shutter, lower vial
into oven, close shutter.
Move vial to cooling
station.
Return vial to tray.
Return vial to shutter.
Perform extractions and injections:
If Single:
-Fill sample loop.
-Start run, vent vial (optional)
If Concentrated:
-Fill sample loop, inject, repeat
(pressurize, test, fill loop, inject).
-Start run, vent vial (optional)
If Multiple extractions:
-Fill sample loop.
-Start run, vent vial (optional)
-Repeat.
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