Metrohm 753 Suppressor Module - Manual (Page 33)

4 Malfunctions – Maintenance
753 Suppressor Module / 8.753.1003 Instructions for Use
30
4.2.6 Cleaning the suppressor
Cleaning the suppressor may be necessary in the following cases (see
also section 4.1):
• Blockage of the suppressor which cannot be remedied
(the suppressor can no longer deliver solutions)
• Obstruction of the suppressor which cannot be reme-
died (the suppressor can no longer be switched to next
position)
To clean the connection piece and the rotor proceed as follows (see
Fig. 9):
1 Disconnect suppressor from IC system
• Disconnect input lead of suppressor from the separating
column and output lead to the detector.
2 Dismantle suppressor
• Unscrew nut 35 35 from suppressor holder 38 38.
• Pull out connection piece 36 36 and suppressor rotor 37 37 from
suppressor holder 38 38 (the connection piece and the rotor
normally stick together).
• Loosen connection piece 36 36 from suppressor rotor 37 37.
3 Clean input and output leads
• Each of the 6 capillary tubings attached to connection piece
36 36 are connected to the pump one after another and ul-
trapure water pumped through.
• Check whether solution emerges from connection piece 36 36. If
one of the input or output leads remains blocked then the
connection piece must be replaced (order number
6.2832.010).
4 Clean suppressor rotor
• Clean the sealing surface of suppressor rotor 37 37 with the aid
of a lint-free cloth and ethanol.
5 Insert suppressor rotor
• Insert suppressor rotor 37 37 in suppressor holder 38 38 in such a
way that the tubing connections at the rear of the rotor fit in
the corresponding openings inside the rotor and that one of
the three holes in the rotor can be seen from below in one of
the openings of the holder.
• 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).