134 Advanced Operation Manual
3 Inlets
During this user- specified sampling period, the solenoid
valve is closed. Flow to the interface is measured by a flow
sensor and controlled by a proportional valve.
After sampling end The solenoid valve opens. The system
returns to the Before Prep Run state. Flow to the interface is
again measured by a flow sensor and controlled by a
proportional valve while column flow is controlled via
back- pressure regulation. The purge flow is controlled by the
user. If desired, gas saver can be turned on at the end of the
run.
Valve
Frit
Frit
Frit
Valve
EPC Module
Valve
Split Vent Trap
Gas Sampling Valve
Headspace
Purge and Trap
FS = Flow Sensor
PS = Pressure Sensor
Column
FS
PS
PS
Split
Carrier Supply
80 PSI
Septum Purge
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