Metrohm 872 Extension Module Suppression – MCS - Manual (Page 47)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
5 Operation and maintenance
872 Extension Module Suppression – MCS
￭￭￭￭￭￭￭￭ 39
￭ If the rotor is correctly inserted, its sealing surface will be approx.
4 mm within the housing. If this is not the case, the rotor must be
moved into the right position from below using a sharp object
(e.g. screwdriver).
6 Cleaning the connecting piece
￭ Clean the surface of the connecting piece (13-2) with ethanol
using a lint-free cloth.
7 Inserting the connecting piece
￭ Insert the connecting piece (13-2) into the rotor housing in such a
way that the connector 1 is on top and the three pins of the con-
necting piece fit into the corresponding recesses on the housing.
￭ Reattach the union nut (13-1) onto the housing and tighten by
hand (do not use a tool).
8 Connecting and conditioning the suppressor
￭ Reconnect the suppressor to the IC system.
￭ Before switching the suppressor over for the first time, rinse each
of the three suppressor units with solution for 5 minutes.
5.4.3.4 Replacing parts of the suppressor
In the following cases, it might be necessary to replace parts of the sup-
pressor:
￭ Loss of suppression capacity which cannot be eliminated (reduced
phosphate sensitivity and/or significant rise in the baseline).
￭ Blockage of the suppressor which cannot be eliminated (solutions can
no longer be pumped through the suppressor).
Both the rotor and the connecting piece can be replaced.
Replacing parts of the suppressor
Replace the parts of 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).