Metrohm 872 Extension Module Suppression - Manual (Page 44)

5.4 Suppressor/SPM ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
36 ￭￭￭￭￭￭￭￭ 872 Extension Module Suppression
5 Inserting the rotor
Caution
An incorrectly inserted rotor can be destroyed during start-up.
￭ Insert the rotor (11-3) into the housing (11-4) 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 (11-5).
￭ 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 (11-2) with ethanol
using a lint-free cloth.
7 Inserting the connecting piece
￭ Insert the connecting piece (11-2) 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 (11-1) onto the housing and tighten by
hand (do not use a tool).
8 Connecting and conditioning the suppressor/SPM
￭ Reconnect the suppressor/SPM to the IC system.
￭ Before switching the Suppressor/SPM over for the first time, rinse
the three suppression units/neutralization units with solution for 5
minutes.
5.4.4.4 Replacing parts of the suppressor
In the following cases, it might be necessary to replace parts of the sup-
pressor/SPM:
￭ Loss of suppression capacity which cannot be eliminated (reduced
phosphate sensitivity and/or significant rise in the baseline) or loss of
sensitivity.
￭ Blockage of the suppressor/SPM which cannot be eliminated (solutions
can no longer be pumped through the suppressor/SPM).
Both the rotor and the connecting piece can be replaced.