Metrohm 833 IC Liquid Handling Unit - Manual (Page 57)

6.3 Handling the sample preparation module
833 IC Liquid Handling Unit / Instructions for Use 8.833.1003
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6.3 Handling the sample preparation module
General
The sample preparation module of the 833 IC Liquid Handling
Sample Preparation Unit contains a total of three cartridges, which
are used in sequence for exchanging cations, for regeneration, and for
rinsing with water. In order to be able to record each chromatogram
under comparable conditions work is normally carried out with a freshly
regenerated cartridge. Switching takes place either automatically
together with the valve switching or manually.
Correct connection
The three actuator unit inlets and outlets numbered 1, 2, 3 each have
two permanently attached PTFE capillaries that must be connected as
described in Section 6.1 and 6.2 (see Fig. 13).
Flow direction
The cation exchanger units of the sample preparation module must
never be regenerated in the same flow direction as that in which the
sample is transported. This is why the inlet and outlet capillaries must
always be mounted as described in Section 6.1 and 6.2 and shown in
Fig. 13.
Never switch to the next position when dry
The sample preparation module must never be switched to the next
position when it is dry, as there is a risk that it could be blocked.
No recycling
The recycling method (return of the eluent to the storage container)
must not be used with the sample preparation module.