Commissioning; Water Connections; Installation Of Electrodes; Checking Magnetic Stirring Stone And Filling In Cleaning Ball - Grundfos AQC-D4 Installation And Operating Instructions Manual

9. Commissioning

Warning
Switch off the power supply before installing.
Warning
The reagents must not come in contact with the eyes
or skin. Wear protective gloves and glasses when
performing the following steps!
The housing of the measuring cell must not come
Note into contact with the reagents. There is a risk of
corrosion and cloudiness.

9.1 Water connections

• Connect the sample water inlet and sample water outlet.
To prevent a siphon effect, the sample water outlet
Caution
must flow freely downwards without
counter-pressure!
Fig. 6 Water connections

9.2 Installation of electrodes

On top of the electrodes, coloured markings are provided for
easier assignment:
• Potentiostatic electrode: green
• pH single-rod electrode: white
• Redox electrode: brown.
10
9.3 Checking magnetic stirring stone and filling in
cleaning ball
1. Unscrew the protective cap (pos. C) at the flow fitting (pos. F).
2. Remove the tube part (transport protection) from the drilled
hole.
Prior to installation of the potentiostatic electrode
(pos. E), do the following:
Note – Check the position of the magnetic stirring
stone (cleaning motor)!
– Fill the cleaning balls into the electrode holder!
9.3.1 Visual inspection of magnetic stirring stone
1. Remove the position stabiliser from the magnetic stirring
stone.
The position of the magnetic stirring stone might be changed by
vibrations of the flow fitting during transport.
2. Check if the magnetic stirring stone is still seated flat on the
lower edge of the screw part.
Fig. 7 Visual inspection of magnetic stirring stone
If the stone is in a wrong position, the screw part or
Caution
the electrode may be damaged when installing the
potentiostatic electrode.
9.3.2 Adding the cleaning balls
Fig. 8 Adding the cleaning balls
• Cut off about 3-4 mm of one edge of the cleaning balls packet,
and carefully fill the 15 balls into the hole (pos. C) of the
potentiostatic electrode (pos. E).
Look into the mounting hole (pos. C):
All balls must be placed in the measuring chamber.
Caution
No ball may be placed above the electrode centering
(black ring with centering indentation).