Metrohm 865 Dosimat plus - Manual (Page 56)

6.2 Extended dosing (XDOS) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
46 ￭￭￭￭￭￭￭￭ 865 Dosimat plus
Single
Dosing with one instrument.
Tandem
Dosing with two Dosimats.
Tandem operation
An 805 Dosimat is connected to the MSB connector of the 865 Dosimat
plus for tandem operation.
Note
Two exchange units with the same cylinder size must be used for tan-
dem operation.
The principle of tandem dosing:
Figure 18 Tandem operation
The two Dosimats operate alternately during dosing. If the dosing cylinder
of one Dosimat needs to be filled, then the second Dosimat will take over
the control of the dosing. The same dosing and filling speeds apply
respectively for both Dosimats.
Because it takes the flat stopcock approximately 2 seconds to switch over,
the filing rate must be greater than the dosing rate. Continuous dosing
cannot be ensured otherwise.
Note
Maximum applicable dosing rate = 0.85 x filling rate