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Valve Control
Valve control examples
Valve control examples
Simple valve—column selection
This is the plumbing for a single valve, configured as a switching valve, that
selects one of two columns for analysis. It has no configuration parameters.
Figure 32 A column selection valve
The column is selected by pressing [Valve #] <scroll to valve 2> [On] (for the
front column) or [Off] (for the back column). This run table ensures that the
valve is in the Off state between runs:
Gas sampling valve
If a valve is configured as a gas sampling valve, it starts a run automatically when
it is switched to the Inject position. This can be done with a keyboard command
or by a subsequence or clock table entry. You may have two gas sampling valves
installed.
First column First column
To detector
Back column Back column
ON OFF
From inlet or
sampling valve
Ensure that the valve is in
the
Off state between runs.
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