Agilent Technologies 4890 - Page 23

Installing Rotary Valves
Installing Rotary Valves 21
Gas sample and column isolation
Column 1
Carrier
Loop
Sample
In
Out
Column 2
Adjustable Restrictor valve
Detector
OFF
OFF
Column 1
Column 2
Detector
OFF
Adjustable Restrictor valve
OFF
Carrier
Sample
In
Out
Loop
Gas sample/backflush and column isolation