Agilent Technologies 6890 Series - Page 668

9 of 10
Jun 2001
Valves
Agilent 6890 Gas Chromatograph Service Manual
Typical Valve Configurations 1140
Column 2
Carrier
Out
IN
Sample
Loop
OFF ON
Column 1
Gas Sampling with Sequence Reverse, Option 804 or 834
Column2
Carrier
Out
In
Sample
Column 1
Detector
or
2nd Valve
ON
OFF
Gas Sampling with Sequence Reverse and Backflush of Column 1, Option 805 or 835