Metrohm 862 Compact Titrosampler - Manual (Page 149)

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862 Compact Titrosampler ￭￭￭￭￭￭￭￭ 139
10 Appendix
10.1 Dosing unit
10.1.1 Maximum dosing and filling rate
The maximum dosing rate and maximum filling rate for the dosing unit
depend on the cylinder volume:
Cylinder volume Maximum rate
2 mL 6.67 mL/min
5 mL 16.67 mL/min
10 mL 33.33 mL/min
20 mL 66.67 mL/min
50 mL 166.00 mL/min
Independent of the cylinder volume, values ranging from 0.01 to 166.00
mL/min can always be entered. When the function is carried out the rate
will be, if necessary, decreased automatically to the highest possible value.
10.1.2 Parameters for preparing (PREP) and emptying (EMPTY)
The PREP function (Preparing) is used to rinse the cylinder and tubings of
the dosing unit and fill them air bubble-free. You should carry out this
function before the first determination or once per day.
The EMPTY function empties the cylinder and the tubings of the dosing
unit.
With these functions you can easily change the reagent in the dosing unit
without coming into contact with chemicals.
Preparing and emptying are carried out with the following, non-alterable
settings:
￭ The entire cylinder volume is dosed via port 1.
￭ For filling/emptying the tubings the following configuration is assumed:
– Tubing on port 1: length = 70 cm, diameter = 2 mm
– Tubing on port 2: length = 25 cm, diameter = 2 mm
￭ Dosing and filling are both carried out with the same maximum rate.