Metrohm 711 Liquino - Manual (Page 84)

4.4 XDOS mode - controlled dosing
711 Liquino, Instructions for use 78
>XDOS par amet er
f i l l r at e max mL/ mi n
Filling rate of dosing unit
max,
0.001…166.66
= highest possible filling rate (depends on type of dosing
unit.)
The filling rate is the adjustable piston stroke speed for aspirating the cylin-
der contents.
Reduce the filling rate for liquids with a higher density
or viscosity, as otherwise too rapid filling may cause an underpressure in
the cylinder.
The time for completely filling an empty dosing cylinder is approx. 20 sec-
onds at max. filling rate (including stopcock switching); at slower filling rates
it takes correspondingly longer.
>XDOS par amet er
aut o f i l l : on
Automatic filling after dosing
on, off
par amet er s
>XDOS dosi ng uni t s
Setting the dosing unit(s)
Navigate with <ENTER>
>XDOS dosi ng uni t s
set up: si ngl e
Use of one or two dosing drives
single,
tandem
= dosing with one dosing drive
= use of two dosing drives for
interruption-free dosing
>XDOS dosi ng uni t s
dosi ng dr i ve: DOS1
Dosing drive connection
DOS1, DOS2, DOS3, DOS4
>XDOS dosi ng uni t s
dos. uni t : def aul t
Name of dosing unit used
Selection list see configuration ' >dosi ng uni t s'
>XDOS dosi ng uni t s
por t use: def aul t
Port allocations of dosing unit
default,
custom
= standard port occupancy, see page 76
= user-defined port allocation , see below
>XDOS dosi ng uni t s
dosi ng por t 1
Dosino port through which dosing is carried
out.
1…4
onl y f or ' cust om'
>XDOS dosi ng uni t s
f i l l i ng por t 2
Dosino port from which the dosing cylinder is
filled.
1…4
onl y f or ' cust om'
>XDOS dosi ng uni t s
wast e por t 4
Dosino port for excess reagent with PREP.
1…4
onl y f or ' cust om'
Maximal values for
dosing and filling rates
Cylinder vol. max. 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
These are pure piston
stroke rates; filling times
not taken into account.
For tandem dosing the
settings for two dosing
drives given alongside
must be carried out.
They are listed one
after another in the
menu.
It is a good idea to use
the same settings for
both dosing drives.