Metrohm 732 IC Detector - Manual (Page 150)

5.2 Maintenance and servicing
732 IC Detector / 733 IC Separation Center
143
7 Insert connection piece
• Insert connection piece 98 98 in suppressor holder 100 100 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.
• Screw nut 97 97 onto the thread of suppressor holder 100 100
manually (do not use tools).
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.
5.2.8 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 suppres-
sor 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 Fig. 24):
1 Disconnect suppressor from IC system
• Disconnect all input and output leads of the suppressor from
IC system and the pump of the 752 Pump Unit.
2 Dismantle suppressor
• Unscrew nut 97 97 from suppressor holder 100 100.
• Pull out connection piece 98 98 and suppressor rotor 99 99 from
suppressor holder 100 100 (the connection piece and the rotor
normally stick together).
• Loosen connection piece 98 98 from suppressor rotor 99 99.
3 Clean suppressor rotor
• Clean the sealing surface of new suppressor rotor 99 99
(6.2832.000) using a lint-free cloth and ethanol.
4 Insert suppressor rotor
• Insert new suppressor rotor 99 99 in suppressor holder 100 100 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.