Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 58)

3.8 Titrants
46
PC Control / Touch Control
Fig. 3.8: Exchange unit tubing connections
Under Exchange unit/PREP parameters and Dosing unit/PREP
parameters you can enter the parameters for carrying out the
preparation (PREP command) and emptying (EMPTY command;
Dosing units only) functions. The preparation function is used to fill
bubble-free and to rinse the exchange or dosing units if they have not
been used for a long time. When this function has been carried out all
the tubing and the cylinder will be filled with reagent. These parameters
are different for exchange units and dosing units.
You should carry out the preparation function before the first
determination or once per day.
Exchange unit
The preparation function can be found under manual control; which
can be started with the [Manual] fixed key (see Section 3.24.2). In the
Device manager, you can define for each dosing device when a
message is to be shown to remind you that the PREP function must be
carried out for the particular dosing device (see Section 3.10).