Metrohm 881 Compact IC pro – Anion – MCS - Manual (Page 103)

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5 Operation and maintenance
881 Compact IC pro – Anion – MCS
￭￭￭￭￭￭￭￭ 93
6 Inserting the new connecting piece
￭ Insert the connecting piece (42-2) into the housing (42-4) in such
a way that the connector 1 is on top and the three pins of the
connecting piece fit into the corresponding recesses on the hous-
ing.
￭ Reattach the union nut (42-1) onto the coupling and tighten by
hand..
7 Connecting and conditioning the suppressor
￭ Reconnect all capillaries of the suppressor to the IC system.
￭ Before switching the suppressor over for the first time, rinse the
three suppressor units with solution for 5 minutes.
5.13 Metrohm CO
2
Suppressor (MCS)
5.13.1 Replacing the CO
2
adsorption cartridge
The 6.2837.000 CO
2
adsorption cartridge (30-4) must be replaced regu-
larly. This is because of blockages and losses in capacity.
Jamming
Moisture can block the CO
2
adsorption cartridge. This is revealed by a
change in color of the cartridge material (the orange part becomes color-
less). As the air flow is reduced, the vacuum becomes lower. To protect
the CO
2
adsorption cartridge, an H
2
O adsorption cartridge (30-7) is instal-
led upstream. Regular regeneration (see Chapter 5.13.2, page 93) of
the H
2
O adsorption cartridge extends the service life of the CO
2
adsorp-
tion cartridge.
Capacity loss
The adsorption capacity of the CO
2
adsorption cartridge is limited.
Depending on the period of operation and laboratory environment, the
adsorption capacity will diminish over time. This is manifested in a rising
baseline (as more CO
2
reaches the detector).
5.13.2 Regenerating the H
2
O adsorption cartridge
The function of the H
2
O adsorption cartridge is to protect the CO
2
adsorp-
tion cartridge against moisture. The service life of the H
2
O adsorption car-
tridge depends on the moisture content of the ambient air. Moisture
reduces the capacity of the H
2
O adsorption cartridge (which can be
observed by a change in color). Before the color changes in the entire fill-
ing material (from orange to colorless, with Fluka Order No. 94098), the
H
2
O adsorption cartridge should be regenerated (see leaflet). The filling
material is replaced during regeneration: