Vial Pressurization - Agilent Technologies G1289 Operating Manual

When the sampler is started, it moves the first vial into the oven. Equilibration
time begins. To shorten the required equilibration time, agitate the vial in the
oven. See "Setting Vial Parameters" on page 63.
Carrier
gas flow
Auxiliary gas
flow for vial
pressurization
Open
Closed
Carrier gas
Auxiliary gas
Figure 4. Standby condition. S1 is open.

Vial Pressurization

At the end of the vial equilibration time, agitation stops, the vial moves in–line
with the sampling needle and is raised by the mechanical rod onto the needle.
The pressurization valve closes. The sampling needle pierces the septum of the
Mass flow
controller
Pressure
transducer
Pressure
Flow
regulator
restrictor
Needle
Headspace
vial
Introduction to Headspace and to the 7694 Headspace Sampler
Vent
Pressure
transducer
S2
S1
6
5
Principles of Operation
1
2
3
4
Sample
loop
To GC
15