Bio-Rad ChromLab™ Software - Manual (Page 61)

Valves
Instrument Guide | 59
The section Flow Paths of the Column Switching Valve explains the specific flow
paths.
The column switching valve has integrated precolumn and postcolumn pressure
monitors. The precolumn pressure monitor measures the pressure that the system
exerts on the column (precolumn pressure). The postcolumn pressure monitor
measures the pressure at the column outlet and provides the delta pressure across
the column. In Manual and Method modes, you can set alarms that cause the
pumps to stop or slow down when a pressure sensor on the column switching valve
detects an overpressure event.
Flow Paths of the Column Switching Valve
During a manual run, you can change the flow path of the column switching valve by
accessing its dialog box in ChromLab.
To change the flow path of the column switching valve
1. Touch or click the Column Switching Valve module in the fluidic scheme to
access its dialog box.
2. In the Column Switching Valve dialog box, select the port to which your column
is connected or through which you want to direct the flow of buffer.