Metrohm 793 IC Sample Preparation Module - Manual (Page 37)

4.2 Maintenance and servicing
793 IC Sample Prep Module/ 8.793.1003 Instructions for Use
33
4.2.6 Cleaning the SP Module A
Cleaning the SP Module A may be necessary in the following cases
(see also section 4.1):
x Blockage of the SP Module A which cannot be remedied
(the SP Module A can no longer deliver solutions)
x Obstruction of the actuator which cannot be remedied
(the actuator can no longer be switched to next position)
To clean the connection piece and the rotor proceed as follows (see
Fig. 9):
1 Disconnect SP Module A from IC system
2 Dismantle SP Module A
x Unscrew nut 3 3337777 from actuator holder 40 40 40 40.
x Pull out connection piece 38
38 38 38 and actuator rotor 33339999 from
actuator holder (the connection piece and the rotor normally
stick together).
x Loosen connection piece from actuator rotor.
3 Clean input and output leads
x Each of the 6 capillary tubings attached to connection piece
are connected to the pump one after another and ultrapure
water pumped through.
x Check whether solution emerges from connection piece. If
one of the input or output leads remains blocked then the
connection piece must be replaced (order number
6.2835.010).
4 Clean actuator rotor
x Clean the sealing surface of actuator rotor 37
37 37 37 with the aid of a
lint-free cloth and ethanol.
5 Insert actuator rotor
x Insert 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).