English (GB)
6
7. Function
7.1 Description of the AQC-D6
Fig. 5
AQC-D6
7.2 Design of the measuring cell
Fig. 6
Measuring cell
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
2
) is measured on the
noble-metal electrode.
The material to be determined (ClO
2
) generates an electric
current:
• The electric current is in the µA range.
• The electric current is proportional to the concentration of the
ClO
2
parameter.
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.
T
M
0
6
81
13
46
16
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
T
M
03
71
52
08
13
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
1
2
3
5
4
1
2
3
4
5
6
6
7
8
Summary of Contents for AQC-D6
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