Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 60)

3.8 Titrants
48
PC Control / Touch Control
Select the Dosing port via which the first cylinder contents are to
be ejected during preparation and emptying.
Enter the Dosing rates for all the ports to be used during the
preparation and emptying functions for drawing in and ejecting the
reagent. Lower rates should be entered for substances with higher
viscosities.
The maximum dosing rate and maximum filling rate for the dosing
unit depend on the cylinder volume:
Cylinder volume Max. 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
You can always enter a value between 0.01 and 166.00 mL/min
independent of the cylinder volume. When the function is carried out the
rate will be reduced automatically to the highest possible value.
3.8.7 Rotating direction of the valve disk (Dosing unit only)
Under Dosing unit/Valve disk you can specify the direction of
rotation of the valve disk. When choosing descending or ascending
respectively the ports will be moved at in descending or ascending
order. The shortest way results with the default setting automatic. If you
want to define a protected port, then choose not over i.e. the valve
disk will not be moved over this port. This is especially useful for
pipetting functions.