Metrohm 872 Extension Module Suppression - Manual (Page 45)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Handling and maintenance
872 Extension Module Suppression ￭￭￭￭￭￭￭￭ 37
Replacing parts of the suppressor
Replace the parts of the suppressor/SPM as follows:
1 Disconnecting the suppressor/SPM from the IC system
￭ Switch off the instrument.
￭ Disconnect all capillaries of the suppressor/SPM from the IC sys-
tem.
2 Dismantling the suppressor/SPM
￭ Unscrew union nut (11-1) from the housing .
￭ Pull the connecting piece (11-2) and the rotor (11-3) 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, inserti it into the slot
of the housing (11-5) and pull out the rotor in this way.
￭ Detach the connecting piece from the rotor.
3 Cleaning the new rotor
￭ Clean the surface of the rotor (11-3) with ethanol using a lint-free
cloth.
4 Inserting the new rotor
Caution
An incorrectly inserted rotor can be destroyed during start-up.
￭ Insert the new 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).
5 Cleaning the new connecting piece
￭ Clean the surface of the rotor (11-2) with ethanol using a lint-free
cloth.