LC Packings SWITCHOS II, User Manual

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Maintenance and Troubleshooting
User’s Manual Switchos II
D850R3
6-3
6.3 Replacing Major Components
A variety of components on the Switchos Advanced Microcolumn Switching Unit
can be readily changed by the user as required to ensure that the instrument is
maintained in optimal condition.
This section provides information and procedures about how to replace user
replaceable parts. In most cases, re-assembly of a component is identical to its
disassembly, except that the steps are performed in the reverse order. If no
comment is made, it should be assumed that the assembly of a component or
installation of a component is identical to disassembly or removal, except that
the actions are in the reverse order.
Sections 6.3.3 to 6.3.5 provide basic information about how to remove the
pump head and how to replace check valves cartridges or piston seals. For more
detailed information refer to the ‘UltiMate Micropump User’s Manual’.
6.3.1 Replacing the Sparging/Filter Frit
The Sparging/Filter Unit is connected via tubing which slides off the unit. Over
time, the filter may become clogged by particulate matter and should be
replaced. In some cases, the filter can be cleaned via an ultrasonic bath
(depending on the nature of the particulate matter).
Note: A clogged filter may lead to poor analytical performance (Section 6.4 -
Troubleshooting).
To replace the Sparging/Filter Frit:
a) Unscrew the Solvent Bottle Caps from the solvent bottles and take the
tubing with the frit out.
b) Remove the old frit by pulling the tubing (item 1, FIGURE 6-1) off the filter
body (item 2, FIGURE 6-1).
c) Insert the He tubing and the solvent tubing into a new Sparging/Filter Frit
(P/N 160044). The He tubing should be placed in the hole closer to the He
outlet.
d) Gently pull at each line to make sure that it is secure.
He Outlet
Solvent Inlet
He Line
Solvent Line
1
2
(Top View)
FIGURE 6-1. Sparging/Filter Frit