Function; Description Of The Aqc-D6; Design Of The Measuring Cell; Function Of The Aqc-D6 - Grundfos AQC-D6 Montage- Und Betriebsanleitung

7. Function

7.1 Description of the AQC-D6

Fig. 5 AQC-D6
Pos. Description
1 Base plate
2 Flow fitting
3 Measuring cell
4 Connection for sample water outlet, hose 6/8 mm
5 Connection for sample water inlet, hose 6/8 mm

7.2 Design of the measuring cell

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2
3
4
5
6
7
8
Fig. 6 Measuring cell
Pos. Description
1 Four-pole connection bush
2 Electrode adapter with integrated electronics
3 Reference electrode
4 Measuring electrode
5 O-ring 14 x 1.8 mm
6 Electrolyte chamber
7 Measurement opening
8 Protection cap
8
1
2
4
3
5
6

7.3 Function of the AQC-D6

The AQC-D6 measuring cell is used to determine the chlorine
dioxide concentration in potable water.
Sample water is taken at a representative position and fed to the
measuring cell.
• The sample water flow rate can be adjusted on the flow fitting.
• A water sensor can, for example, be used to trigger an alarm
or to switch off the control functions if there is insufficient
sample water.
• The substance to be determined (ClO
noble-metal electrode.
The material to be determined (ClO
current:
• The electric current is in the µA range.
• The electric current is proportional to the concentration of the
ClO parameter.
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The measuring cell is controlled with a potentiostat integrated in
the measuring amplifier.
A precisely defined potential of the measuring electrode is
retained through a reference system. This results in a linear
response for the measuring cell as well as a stable zero point for
the measurement.
The measuring amplifier and regulator of the Oxiperm Pro
chlorine dioxide system:
• amplifies the current
• calculates it using the calibration parameters
• displays the chlorine dioxide concentration as a numerical
value
• controls a dosing pump as an actuator.
) is measured on the
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) generates an electric
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