Function - ProMinent DULCOTEST CLO 1 Instrucciones De Servicio

Functional Description
2.3

Function

Gold wires with a diameter of 2 mm are
used as the working electrode (cathode)
and counter electrode (anode); a silver
ring coated with a layer of silver halide is
used as reference electrode. After the
sensor has been electrically connected to
the controller, a potentiostat is used to
ensure there is a constant polarisation
voltage for the required electrode reaction
on the working electrode, independent of
the current flow. The current flow (depo‐
larisation current) produced, which under
constant conditions is proportional to the
concentration of the hypochlorous acid, is
converted into a standard output signal
(4...20 mA) by the sensor electronics and
is displayed by the measuring device/con‐
trol device.
The photometric DPD-I method is used to
calibrate the DULCOTEST ® sensor for
free chlorine CLO 1 / CLO 2.
15