Design And Function - ProMinent DULCOTEST CGE 2-mA-10 ppm Operating Instructions Manual

Safety / Design and function
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Design The CGE chlorine sensor consists of 2 main components, the electrode
adaptor and the membrane cap. The membrane cap filled with electrolyte
constitutes the measuring compartment into which the electrodes are dipped.
A microporous membrane isolates the compartment from the sample
medium.
The probe has integrated temperature compensation.
The amplifier electronics are located in the upper part of the adaptor,
embedded in plastic. The amplifier electronics:
mA-Variant - convert the probe's primary current to an output signal of 4-20 mA.
The mA model is a probe with a passive 4-20 mA two-wire interface, i.e. the
power supply comes from an external controller, e.g. DULCOMETER
D2C, DULCOMARIN
4P-Variant - Converted for the D_4a controller. The voltage is supplied by the D_4a
controller.
Measured variable Free chlorine (HOCl, OCI) and organically bound chlorine (to cyanuric acid in the
form of trichloroisocyanuric acid or sodium dichloroisocyanurate-bound chlorine).
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• Avoid uncontrolled dosage caused by a probe defect.
Switch off secondary control systems or adjust them to
manual operation before assembling the probe. A probe
defect can result in an incorrect input variable for the
controller/measuring device and cause uncontrolled
dosage.
• Depressurise the system before assembling the probe.
Close stop valves in front of and behind the in-line probe
housing. Fluid could escape if the probe is assembled
under pressure.
• In case of an emergency, first switch off the controller at
the mains. If fluid escapes from the in-line probe housing
(DGM/DLG), close the stop valves installed on-site at the
batching in-flow and out-flow.
• Follow the plant operator's safety advice before opening
the DGM/DLG.
• Do not exceed the maximum operating pressure of 1 bar
(DLG) or 3 bar (DGM).
• Do not allow the flow to fall below the minimum rate.
Monitor the flow in the connected measuring device/
controller. If the measured variable is used as a control,
switch off the controller or adjust it to constant load when
the flow rate falls below the minimum.
• Check the probe regularly for dirt, algae and air bubbles.
Eliminate air bubbles by tapping the probe against the
DLG/DGM. Eliminate dirt by cleaning the probe in a jet of
water.
• Once the sensor has been put into operation, it must be
kept damp.

Design and function

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