Metrohm 753 Suppressor Module - Manual (Page 35)

4 Malfunctions – Maintenance
753 Suppressor Module / 8.753.1003 Instructions for Use
32
4.2.7 Exchanging the suppressor
Exchanging the suppressor in the suppressor block of the 753 Sup-
pressor Module may be necessary in the following cases (see also
section 4.1):
• Loss of suppressor capacity which cannot be reme-
died (reduced phosphate sensitivity and/or strong rise
in baseline)
• Blockage of the suppressor which cannot be remedied
(the suppressor can no longer deliver solutions)
Both the 6.2832.000 suppressor rotor as well as the 6.2832.010 con-
nection piece with the input and output leads can be exchanged. To
exchange these components proceed as follows (see Fig. 9):
1 Disconnect suppressor from IC system
• Disconnect all input and output leads of the suppressor from
IC system and the pump of the 753 Suppressor Module.
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 suppressor rotor
• Clean the sealing surface of new suppressor rotor 37 37
(6.2832.000) with the aid of a lint-free cloth and ethanol.
4 Insert suppressor rotor
• Insert new 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).
5 Clean connection piece
• Clean the sealing surface of new connection piece 36 36
(6.2832.010) with the aid of a lint-free cloth and ethanol.