Evoqua WALLACE & TIERNAN DEPOLOX 5 E, Инструкция по эксплуатации

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WT.050.810.040.DE.IM.0817
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 fil-
ter (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 non-
pressurized version and 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 housing.
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.
Working and counter electrodes are designed as half-ring elec-
trodes and consist of a special platinum alloy. The reference elec-
trode is a silver–silver chloride electrode, which is connected to the
sample water via two membranes. The reference electrode
immerses in an electrolyte solution and can also be refilled during
operation.
A
B
C
D
E
F
G
H
I
J
K