English (GB)
6
7. Product introduction
7.1 Intended use
The DID is designed for online monitoring of water quality and
controlling of disinfectants in clean media, such as drinking water.
The required components - sensors and control unit CU 382 - are
assembled with required flow cells, mounting fittings and
pipework on a compact panel.
In all types of applications, the respective acceptable limits, which
are provided in the technical data in the respective manuals, have
to be observed. All applications falling outside of these limits, and
which are not authorised by the manufacturer in written form, do
not fall under the manufacturer’s liability.
The device must only be used for the purpose described in this
manual. Use in applications not described in this manual, or
modification of the device without written agreement from the
manufacturer, is not allowed. The manufacturer is not liable for
claims following from such unauthorised use. In such a case, the
risks are the sole responsibility of the operator.
7.2 Functional principle
The control unit CU 382 is equipped with a display and can be
operated via 7 buttons on the front panel of the device. The
operating software starts automatically when the CU 382 is
powered on.
The CU 382 collects readings from all sensors using a digital bus
connection. It displays the data and makes it available for dosing
purpose. The CU 382 also includes a PID (Proportional-Integral-
Derivative) controller which is capable of dosing disinfectants to
the monitored water (drinking-, bathing-, waste-water, ...).
The hydraulic part of the station manages the complete water
flow from the inlet to the outlet of the DID. This includes filtration,
pressure reduction, flow restriction and flow control as well as
specific designed flow cells for proper mounting of the sensors
and appropriate sampling.
7.3 Components
Fig. 3
Components of measurement and control system with
flow cell
.
Fig. 4
Components of measurement system immersed
sensor
TM
06 592
6 031
6
8
9
5
4
3
2
1
11
10
10
12
13
14
15
15
15
15
7
6
6a
OK
8
18
TM
06 60
38 051
66
Pos. Description
1
Water inlet 1/2"
2
Inlet valve 1/4" NPT
3
Inlet strainer with screw cap for sieve removal/cleaning
4
Flow restrictor (mechanical)
5
Flow detector (digital) indicates alarm on the control unit if
water flow decreases below minimal flow rate (approx.
0.25 l/min.
6
Flow cell for one or three sensors. Combined flow cell for
up to 3 sensors provides quick connect / disconnect
design by safety pins to reduce offline time during sensor
maintenance. Includes also ½” outlet and a sampling point
(6a).
7
Sensors
8
Control unit CU 382 for 1 or 3 sensors
9
Opening in the panel to pass through power supply and /
or sensor cables
10 Screw joints to open cable terminal compartment
11 Clip to open housing cover
12 Cable bushing for power supply
13 Connector for s::can sensors
14 Cable bushing for signal outputs
15 Holes for wall mounting
16 Sensor holder
17 Protective cover
18 Flat panel
8
11
10
10
12
13
14
OK
8
7
16
17
