Metrohm 711 Liquino - Manual (Page 81)

4. Detailed description
711 Liquino, Instructions for use 75
The following equation can be used to estimate whether the max. dosing rate will be used:
Dosi ng r at e = r equi r ed del i ver y r at e ( i n mL/ mi n) ∗ 2. 22
If the required dosing rate exceeds the max. dosing rate for the selected dosing unit (or cylinder
volume) then a larger dosing unit must be selected.
The limits of the individual dosing units:
Cylinder vol. Max. dosing rate
2 mL 6.66 mL/min
5 mL 16.66 mL/min
10 mL 33.33 mL/min
20 mL 66.66 mL/min
50 mL 166.66 mL/min
• Time&Rate — you enter the time for which dosing is to be carried out at the preselected dos-
ing rate. Filling times are taken into account.
Task:
Time and rate
Simple dosing
Vol
[mL]
t [HH:MM:SS]
constant
dosing rate
filling
time
Tandem dosing
Vol
[mL]
t [HH:MM:SS]
constant
dosing rate
Delivery rate
To calculate the effective delivery rate of the Liquino the cylinder volume and
the filling times of the dosing unit must be taken into account.
The max. delivery rates of the various dosing units:
Cylinder volume Max. dosing rate Max. delivery rate
2 mL 6.66 mL/min approx. 170 mL/h
5 mL 16.66 mL/min approx. 430 mL/h
10 mL 33.33 mL/min approx. 890 mL/h
20 mL 66.66 mL/min approx. 1.7 L/h
50 mL 166.66 mL/min approx. 4.3 L/h
Tandem dosing
Tandem dosing with two dosing devices is used for continuos dosing. While
one dosing device is filling its cylinder again after having dosed in a cylinder
volume, the second dosing device takes over the dosing. The Dosinos work
alternately.