Metrohm 793 IC Sample Preparation Module - Manual (Page 39)

4.2 Maintenance and servicing
793 IC Sample Prep Module/ 8.793.1003 Instructions for Use
35
4.2.7 Exchanging the cation exchange material
Exchanging the cation exchange material in the SP Module A of the 793
IC Sample Prep Module may be necessary in the following cases (see
also section 4.1):
x Loss of cation exchange capacity which cannot be remedied
x Blockage of the SP Module A which cannot be remedied
Both the 6.2835.000 actuator rotor as well as the 6.2835.010 connection
piece with the input and output leads can be exchanged. To exchange
these components proceed as follows (see Fig. 9):
1 Disconnect SP Module A from IC system
x Disconnect all input and output leads of the SP Module A
from IC system and the pump of the 793 IC Sample Prep
Module.
2 Dismantle actuator
x Unscrew nut 37 37 37 37 from actuator holder 40 40 40 40.
x Pull out connection piece 38
38 38 38 and actuator rotor 39 39 39 39 from
actuator holder (the connection piece and the rotor normally
stick together).
x Loosen connection piece from actuator rotor.
3 Clean actuator rotor
x Clean the sealing surface of new actuator rotor (6.2835.000)
with the aid of a lint-free cloth and ethanol.
4 Insert actuator rotor
x Insert new actuator rotor in actuator holder in such a way that
the tubing connections at the rear of the rotor fit in the corre-
sponding openings inside the rotor and that one of the three
holes in the rotor can be seen from below in one of the open-
ings of the holder.
x If the rotor has been inserted correctly its sealing surface will
be about 4 mm inside the holder. If this is not the case then
the rotor must be brought into the correct position from below
with the aid of a sharp object (e.g. screwdriver).
5 Clean connection piece
x Clean the sealing surface of new connection piece
(6.2835.010) with the aid of a lint-free cloth and ethanol.
6 Insert connection piece
x Insert new connection piece in actuator holder in such a way
that connection "1" is at the top and that the three lugs on the
connection piece fit in the corresponding openings of the
holder.
x Screw nut onto the thread of actuator holder manually (do not
use tools).