ProMinent DULCOTEST PAA 1-mA-200 ppm Operating Instructions Manual page 34

Assembly
Diaphragm cap
Assembling the
diaphragm cap
34
Fig. 3:
Bleed hole
Pipette
Set the electrode shaft vertically on the filled diaphragm cap.
Ensure your fingers do not cover the bleed hole located beneath
the rubber seal.
Screw in the diaphragm cap by hand so that there is no empty
space visible between the diaphragm cap and electrode shaft.
As the diaphragm cap is screwed into position, any excess
electrolyte should be able to escape freely through the bleed
hole beneath the rubber seal (see fig. 3).
IMPORTANT
• Depressurise the system before installing the measuring
cell in the flow housing. Close stop valves to the front and
rear of the in-line probe housing.
• Placing/removing the measuring cell into/from the in-line
probe housing should be done slowly.
• Do not exceed the maximum permitted operating pressure
of 1 bar (DLG III) or 3 bar (DGM)!
• Ensure the flow does not fall below the minimum flow rate
of 20 l/h! Monitor the flow on the connected measurement
and control equipment. If the measured value is used as a
control, switch off the control by reducing to below the
minimum flow rate or switch to basic load.
• Use the measuring cell only in in-line probe housing types
DLG III A (914955), DLG III B (914956) or DGM (module 25 mm)
in order to guarantee the required flow conditions!
There is no guarantee provided for use with other in-line
probe housings.
• Avoid installations, which allow air bubbles to build up in the
sample water.
Air bubbles that cling to the diaphragm of the sensor can
cause the measured value to be too small and thus lead to
incorrect metering in the control system.
Diaphragm
cap
ProMinent ®