Agilent Technologies 4890 - Page 21

Installing Rotary Valves
Installing Rotary Valves 19
Gas sampling with sequence reverse
Gas sampling with sequence reverse and backflush of column 1
Column 2
Carrier
Out
In
Sample
Loop
Column 1
OFF
ON
Column 2
Carrier
Out
In
Sample
Column 1
Detector
or
2nd valve