Metrohm 861 Advanced Compact IC - Manual (Page 89)

4.2 Maintenance and servicing
861 Advanced Compact IC / Instructions for Use 8.861.1033
79
111 Screw nut
112 Connection piece (6.2832.010)
with input and output leads
113 Suppressor rotor (6.2832.000)
114 Suppressor holder
115 Slot in the suppressor holder
8 Connect and condition the suppressor
• Reconnect the suppressor to the IC system.
• Before switching the suppressor to the next position for the
first time, rinse all 3 suppressor units with solution for 5 min.
4.2.9 Replacing the suppressor
The suppressor in the suppressor block may have to be replaced in the
following cases:
• Irremediable loss of suppressor capacity (reduced phosphate
sensitivity and/or strong rise in baseline)
• Irremediable blockage of the suppressor (the suppressor can no
longer deliver solutions)
Both the 6.2832.000 Suppressor rotor and the 6.2832.010 Connection
piece with the input and output leads can be replaced. To replace these
components proceed as follows (see Figure 22):
1 Disconnect suppressor from IC system
• Disconnect all input and output leads of the suppressor from
IC system and peristaltic pump.
2 Dismantle suppressor
• Unscrew nut 111 from suppressor holder 114.
• Pull out connection piece 112 and suppressor rotor 113 from
suppressor holder 114 (the connection piece and the rotor
normally stick together). If this is not the case, take a sharp
object, insert it in slot 115 of the suppressor holder and use it
to pull out suppressor rotor 113).
• Loosen connection piece 112 from suppressor rotor 113.
3 Clean suppressor rotor
• Clean the sealing surface of new suppressor rotor 113
(6.2832.000) using a lint-free cloth and ethanol.
4 Insert suppressor rotor
• Insert new suppressor rotor 113 in suppressor holder 114 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