Checking System Components; Solvent Bottle Caps And Degassing Unit; Solvent Selection Valve - Basic Test - LC Packings SWITCHOS II User Manual

Testing the Switchos

5.2 Checking System Components

5.2.1 Solvent Bottle Caps and Degassing Unit

The He lines, the regulating valve and connections can be tested by the following
procedure:
a) Close the Shut-Off Valves (FIGURE 5-1) and apply 3 bar (45 PSI) of He
pressure.
Caution: Do not operate the He lines a higher pressure than 4 bar (60 PSI).
CAUTION
FIGURE 5-1
b) Open the He Regulating Valve on the front panel. The regulating valve should
be turned 90
observed in the solvent bottle).
c) Open the shut-off valve on the bottle cap for solvent bottle A, by closing the
He regulating valve verify that the bubbles of He exit on the side frit of the
sparging/filter frit. Check to make sure that it is possible to regulate the He
flow by opening the He regulating valves until the maximum is reached (90
d) Repeat steps (b) and (c) for each solvent bottle.
5.2.2 Solvent Selection Valve – Basic Test
To check the operation of the Solvent Selection Valve and the Valve Controller:
a) Set the Switchos in local mode by the Remote/Local switch on the back
panel (the LEDs of the two push buttons on the front panel should be
illuminated).
b) Select the next available solvent channel by the SSV button. The
corresponding LED should be illuminated and the sound of the moving
solvent selection valve should be heard for a few seconds.
c) Repeat step (a) for each solvent channel.
5-2
Vent
He Shut-Off
Valve
.
The He Shut-Off Valve (Opened Position)
o . Check to see if there are any leaks (i.e. are He bubbles
D850R3
User's Manual Switchos
o
).