ProMinent DULCOTEST CTE 1-mA Mode D'emploi page 35

Assembling
the sensor
®
ProMinent
Place the electrode shaft vertically onto the filled membrane cap.
Do not cover the vent hole below the rubber seal with your fingers.
Screw on the membrane cap by hand as far as possible. There should
not be a visible gap between the electrode shaft and membrane cap.
When you screw on the cap, excess electrolyte will leak out through the
hole below the rubber seal. (see fig. 3).
Wipe away any electrolyte with a soft paper tissue or similar.
Rinse the nozzle thoroughly with a clean, warm water jet so that no
electrolyte remains on the inside and outside of the nozzle.
IMPORTANT
• Depressurise the system before inserting the sensor into
the in-line probe housing. Close the stop valves before
and after the in-line probe housing.
• Insertion and withdrawal of the sensor into or out of the
in-line probe housing should be carried out slowly.
• Do not exceed the maximum operating pressure of 1 bar
(DLG III) or 3 bar (DGM).
• Do not allow the flow to fall below the minimum rate of
20 l/h. Monitor the flow with the connected measuring
device/controller. If the sensor's signal is used for
controlling, switch off the controller or adjust it to
constant load when the flow rate falls below the lower
limit.
• To guarantee the required flow conditions, the sensor
should be used only in the following in-line probe housing
models: DLG III A (914955), DLG III B (914956) or DGM
(25 mm module).
Correct function cannot be guaranteed if the sensor is
used with other in-line probe housings.
• Avoid installations which allow air bubbles to enter the
sample water.
Air bubbles clinging to the sensor membrane can lower
the resultant measured value and cause incorrect dosing
within the control system.
Assembly
35