Cleaning; Standard Cleaning - BRAND Titrette Mode D'emploi

Cleaning

The instrument must be cleaned in the following situations to assure correct operation:
n immediately, if the hand wheels
become harder than usual to turn
n before changing the reagent
n prior to long term storage
The glass cylinder, valves, telescoping filling tube and titrating tube contain reagent!
Warning!
Follow the safety instructions (see page 36)!

Standard Cleaning

1.
Hold a suitable receiving vessel below the opening of the titra-
ting tube. Empty the instrument completely by turning the hand
wheels.
2.
Screw the instrument onto a bottle filled with deionized water,
and set the valve to 'Titrate' (Fig. 2).
3.
Place a suitable receiving vessel below the opening of the titra-
ting tube, and rinse the instrument several times by completely
filling and emptying it (Fig. 3).
4.
Set the valve to 'Recirculation' (Fig. 4), and rinse the instrument
several times by completely filling and emptying it.
5.
This process can optionally be repeated with a suitable cleaning
agent.
6.
Next, rinse again with deionized water.
7.
Screw the burette onto an empty bottle. Empty the piston com-
pletely by executing several up and down motions on the instru-
ment (Fig. 7).
8.
Set the valve to 'Titrate', place a suitable receiving vessel under
the titrating tube, and empty the titrating tube.
54
n prior to dismantling the instrument
n regularly when using crystallizing
liquids
2
3
4
7