Hach-Lange TITRALAB 840_845 Reference Manual - Manual (Page 132)

Titra Lab ® TitraLab 840 and 845 Reference Manual
Page 132
Predose mode,
Predose until The Predose is the dose of titrant to be added at maximum burette
speed at the beginning of the titration before the measurement starts.
The predose parameter is intended as a means of optimising the titra-
tion time and should be based on experience or experimental data.
Two types of predosing can be used: Predose to set volume and Pre-
dose to set potential or pH.
Predose to set volume:
Select Predose mode = ml and enter the volume to be added
for Predose until. You can use Predose to set volume to speed
up your titrations if you know in advance, all your samples will con-
sume a certain volume.
Predose to set potential or pH:
Select Predose mode = pH/mV and enter the pH or potential
(in mV) for Predose until. The Titration Manager will then start
dosing continuously at the beginning of the titration until this pH or this
potential is reached.
Enter in:
Edit method > Parameters menu
Edit reagent > Calibration parameters menu
Range available:
Predose mode: ml or pH/mV
Predose until: 0.00 to Max. volume or -9 to +23 pH
or -2000 to +2000 mV.
Preprogrammed
list Ready-to use list of methods, electrodes and reagents which have
been programmed in the Titration Manager during manufacturing. This
list cannot be deleted nor modified.
These lists can be used to create methods electrodes or reagents
using the copy command, and store them in the user list.