User`s guide

3-9
Installation 3
looking at the rear of the 306 pumps and ensuring
that the correct switch (2, 3 or 4) has been switched
into the bottom position. The switches are labelled
REMOTE, and are numbered 1 to 8 from left to right.
Connecting the 305 to a 307
The 305 Master pump can directly control a 307
pump without the addition of a manometric module
and with pressure display on the 305 screen.
In this case, the value 2 must be entered in the 307
software as a GSIOC identification number for the
307 pump. If this is omitted, the pressure value
dispalyed by the 305 will remain at zero. The
remedy is to first correct the 307 identification, then
to switch off and on the two pumps.
Hydraulically, the 307 should normally be used for
solvent B, and set-up 1 is recommended (rather
than set-up 2) for the following reasons:
• As it is usually the case in Gilson gradient
systems, solvent B, of higher elution strength
than A (and normally more expensive), does not
enter the pulse dampener. This makes purge
easier.
• Tubing is shorter and fewer elbows are required.
Control Connections
Set-up 1
Set-up 2