Evoqua WALLACE & TIERNAN DEPOLOX 5 E 700 P Series, Инструкция по эксплуатации

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WT.050.810.040.DE.IM.0519
Description
DEPOLOX
®
5 E flow cell
3.
3.3.2 DEPOLOX
®
5 E flow cell
The function description of DEPOLOX
®
5 E flow cell is described below
from the sample water inlet to the sample water outlet.
The sample water is connected on the input side to the shut-off ball valve
(A) via the G1/2” connection. The input pressure must be around 0.25 to
3.0 bar. To guarantee a constant flow, the minimum input pressure must
not be less than 0.25 bar. Otherwise, an optional booster pump must be
used. If the admission pressure exceeds 3.0 bar, an optional pressure
reducing valve must be used.
The sample water flows in the flow direction to the check valve housing
(C) through the filter unit (B) or through the built-in fine filter (membrane
sensors only). In the filter unit a stainless steel fine filter (sample water
fine filter) with a mesh size w=500 µm can be installed. The fine filter is
only used in conjunction with the membrane sensors.
The check valve housing (C) provides a kick-back function and guides
the ball for monitoring the flow rate.
The multi-sensor (D) monitors the correct flow by the float principle with
reed switch and measures the temperature with the Pt1000. The large-
surface transducer grounding is through the stainless steel sensor hous -
ing.
The flow control valve (E) ensures a flow of the sample water that is not
dependent on the operating pressure. The correct sample water flow of
33 l/h is factory-preset, checked and logged. If the admission pressure
rises, the valve ball moves towards the closing direction; if the admission
pressure drops, the ball moves towards the opening direction.
In the cell body (G) the 3-electrode measuring cell (H) with external
potentiostatic control circuit and refillable electrolyte tank is fitted. Work -
ing and counter electrodes are designed as half-ring electrodes and con -
sist of a special platinum alloy. The reference electrode is a silver–silver
chloride electrode, which is connected to the sample water via two mem -
branes. The reference electrode immerses in an electrolyte solution and
can also be refilled during operation.
The sample water that flows tangentially into the 3-electrode measuring
cell (H) ensures continuous hydromechanical cleaning of the sensor
electrodes with special cleaning sand, thereby preventing natural soiling
of the electrode surfaces. Clean electrode surfaces and a constant flow
of sample water are decisive criteria for a qualitative good oxidizing agent
measurement and quick response.
The 3-electrode measuring cell (H) is connected to 700 P electronics
module or 700 M electronics module through DFMe electronics
module (I) (DES sensor module for 3-electrode measuring cell). The
adjustable cell voltage Upot is output through the potentiostatic control
circuit. A measuring cell current (µA signal) that is proportional to the dis -
infectant concentration in the sample water is evaluated with the 700 P
electronics module or 700 M electronics module.
A
B
C
D
E
F
G
H
I
J
K