Metrohm 799 GPT Titrino - Manual (Page 107)

2.18 Manual dosing and preparation of titration burets
799 GPT Titrino
103
2.18 Manual dosing and preparation of titration burets
2.18.1 Manual dosing
serves as preselection for the buret: internal
D0, external D1, external D2.
With , the preselected buret will dose as long
as is pressed. The dosing rate can be set with
the analog potentiometer at the Titrino. If no buret has
been preselected, the buret which is active in the
method, will dose.
2.18.2 Preparation of the titration burets, key
The titrating burets should be prepared, if
• they have not been used for a long time
• a new bottle of reagent is used
• you are using the exchange unit for the first time.
internal D0 prep
external D1: prep
With , the preparation (or emptying, resp.) of
the selected buret will begin. The parameters for the
preparation are under , see page 10.
To change the buret, press repeatedly.
Attention: Liquid will be expelled at the buret tip!
Internal buret D0, Titrino buret
External buret D1
The Titrino recognizes the buret type automatically
(Dosimat or Dosino).
For Dosinos:
• After the preparation the dosing unit is without air
bubbles and filled up to the top of tube.
• Press <←/→> for "empty" . This function empties
the Dosino completely, e.g. for cleaning the dosing
unit.
External buret D2
as for buret D1
Prep sequence for Dosinos:
The following volumes are dosed:
Volume of the aspiration tube, volume of the cylinder, volume of the dosing tube.
The cylinder volume can be expelled either through the top or back to the bottle. The
parameters are entered under , see page 11.
PREP
RS
4
DOS