Waters Alliance e2695 Operator's Manual page 35

Figure 1–11: e2695 column heater
Location of
optional
column
selection
valve
1.5.7.1 Two-column selection valve
The firmware does not recognize the 2-column selection valve (6 port, 2 position) option. Instead,
the option is controlled via one of the four I/O event switches on the separations module's rear
panel. You select one column by turning the switch to Off and the second column by turning the
switch to On.
1.5.7.2 Three-column selection valve
The 3-column selection valve selects any of three column positions. It is preconfigured before
shipment, but you can reconfigure it. For more information, see
valve" on page 203.
1.5.7.3 Six-column selection valve
The 6-column selection valve selects any one of six column positions. You can specify any position
as bypass or waste. For more information, see
1.5.7.4 Two-column regeneration valve
With the 2-column regeneration valve, you perform LC operations using one column while a
second column undergoes regeneration by a second solvent delivery system. For more
information, see "Connect the column selection valve" on page
February 27, 2018, 715003794 Rev. C
"Connect the column selection
"Connect the column selection valve" on page
203.
Page 35
203.