Metrohm 850 Professional IC MSM-HC MCS Prep 3 - Manual (Page 111)

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5 Operation and maintenance
850 Professional IC Anion – MSM-HC – MCS – Prep 3
￭￭￭￭￭￭￭￭ 101
7 Inserting the SPM connecting piece
￭ Insert the SPM connecting piece (53-2) into the SPM housing
(53-4) in such a way that the connector 1 is on top and the three
pins of the SPM connecting piece fit into the corresponding
recesses on the SPM housing (53-4).
8 Connecting and conditioning the SPM
￭ Reconnect the SPM to the IC system.
￭ Before switching the SPM over for the first time, rinse the three
neutralization units with solution for 5 minutes.
5.10.3.3 Replacing parts of the SPM
It may be necessary to replace parts of the SPM in the following cases:
￭ Loss of neutralization capacity which cannot be eliminated (reduced
detection sensitivity).
￭ Blockage of the SPM which cannot be eliminated (solutions can no lon-
ger be pumped through the SPM).
Both the SPM rotor A (53-3) and the SPM connecting piece (53-2) with its
supply and discharge lines can be replaced.
Replacing parts of the SPM
Replace parts of the SPM as follows (see Figure 53, page 99):
1 Disconnecting the SPM from the IC system
￭ Switch off the instrument.
￭ Disconnect capillary connections of the SPM from the system.
2 Dismounting SPM
￭ Unscrew union nut (53-1) from the SPM housing (53-4).
￭ Pull the SPM connecting piece (53-2) and the SPM rotor A (53-3)
out of the SPM housing (53-4). The SPM connecting piece and
the SPM rotor A normally stick to one another - if this is not the
case: Take a sharp object, insert into the slot (53-5) in the SPM
housing, and pull out the SPM rotor A (53-3) in this way.
￭ Detach the SPM connecting piece (53-2) from the SPM rotor A
(53-3).
3 Cleaning the new SPM rotor A
￭ Clean sealing surface of the new SPM rotor A (53-3) with ethanol
using a lint-free cloth.