How The Hs Fills The Sample Loop (Extracts A Sample); Default Loop Fill Mode; Custom Loop Fill Mode - Agilent Technologies 7697A Advanced Operation Manual

How the HS Fills the Sample Loop (Extracts a Sample)

Default loop fill mode

Custom loop fill mode

Advanced Operation
After the vial is pressurized and has stabilized, the HS will
perform the specified extractions. The six port valve
switches, allowing the pressurized sample to vent through
the sample loop. After the specified conditions are met, the
loop is considered filled. See
Transfer
line
Carrier gas
Figure 7 Filling the sample loop
The HS provides two modes for filling the sample loop,
Default and Custom.
In this case, the HS depressurizes the sample vial into the
sample loop at a specified rate until the sample vial
pressure drops a known amount. The HS calculates the final
loop pressure and equilibration time based on current HS
configuration and method data.
In this case, you can specify the loop fill rate, final loop
pressure, and equilibration time.
How the 7697A Headspace Sampler Works
Figure 7 below.
4
3
5
2
6
1
Vent
2
Sample probe
21