Metrohm 872 Extension Module Suppression – MCS - Manual (Page 46)

5.4 Suppressor/SPM
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
38 ￭￭￭￭￭￭￭￭
872 Extension Module Suppression – MCS
Cleaning the suppressor
Clean the suppressor as follows:
1 Disconnecting the suppressor from the IC system
￭ Switch off the instrument.
￭ Disconnect all capillaries of the suppressor from the IC system.
2 Dismantling the suppressor
￭ Unscrew union nut (13-1) from the housing (13-4).
￭ Pull the connecting piece (13-2) and the rotor (13-3) out of the
housing.
The connecting piece and the rotor normally stick to one another
– if this is not the case: Take a sharp object, insert it into the slot
of the housing (13-5) and pull out the rotor in this way.
￭ Detach the connecting piece from the rotor.
3 Cleaning the inlets and outlets
￭ Connect in turn each of the 6 PTFE capillaries fastened on the
connecting piece (13-2) to the high pressure pump and pump
through ultra pure water.
￭ Check whether solution emerges at the connecting piece. If one
of the inlets or outlets remains blocked, the connecting piece
must be replaced (order number 6.2835.010) (see "Replacing
parts of the suppressor", page 39).
4 Cleaning the rotor
￭ Clean the surface of the rotor (13-3) with ethanol using a lint-free
cloth.
5 Inserting the rotor
Caution
An incorrectly inserted rotor can be destroyed during start-up.
￭ Insert the rotor (13-3) into the housing (13-4) in such a way that
the tubing connections on the rear of rotor fit into the corre-
sponding recesses inside the housing and one of the three holes
of the rotor is visible from below in the slot of the housing (13-5).