40 User Information
Introduction to Headspace and to the G1888 Network Headspace Sampler
End of cycle and vial recovery
The sample vial lowers into the carousel. The carousel rotates
and the lift returns the vial to the tray. The vent valve opens to
purge the vent line. The sampler returns to the standby
configuration. See Figure 11. The default vent time for S2 is
30 seconds. To adjust the vent time, see Vent Valve purging on
page 84.
.
Figure 11 Purge. S1 is open. S2 is open for 30 seconds.
Carrier gas flow
Mass
controller
Pressure
transducer
Vent
Sample
loop
To GC
Auxiliary gas flow
for vial pressurization
Pressure
regulator
Pressure
transducer
Flow restrictor
S1
S2
Needle
Headspace vial
Open
Closed
Carrier gas
Auxiliary gas
1
2
3
4
5
6
flow
Toggle
switch
Toggle
switch
medium_standard.book Page 40 Tuesday, February 17, 2004 10:14 AM
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