9
©
Dinel, s.r.o. CLS–23
Applies to: CLS–23_–20, 21, 30
(for electrode length up to 300 mm)
For electrodes with a length
over 300 mm
for the detection in non-conductive containers (sensors
in vertical position) must be used the auxiliary electrode (e.g. conductivity probe). The
auxiliary
electrode
is connected to the sensor housing. Recommended length of the auxiliary electrode
and the distance from the sensor are shown in the picture.
Suitable types of auxiliary electrode probes are e.g. Dinel CNP–18F–30 with M18 thread.
max.
min.
E
b
E
E
k
c
d
>5
E
a
Ep
>5
>5
Electrical connection to
the sensor housing
Conductive probe
CNP–18F–30
Non-conductive tank
30
E
30
a
E
Ep
20
E
40
b
50
E
10
c
40
E
40
d
20
E
20
k
+
≈
>
+
≥
=
+
≥
=
+
≥
=
+
≥
=
E – Electrode length in mm
30
E
30
a
E
Ep
20
E
40
b
50
E
10
c
40
E
40
d
20
E
20
k
+
≈
>
+
≥
=
+
≥
=
+
≥
=
+
≥
=
max.
min.
E
b
E
E
k
c
d
>5
E
a
Ep
>5
>5
Auxiliary electrode PDE–18
7 . e
lectrical
connection
For “A” variant with the fixed cable, the individual colour cores of the connecting cable are con
-
nected to the respective terminals of the related equipment (supply unit).
For “C” variant with the connector, the cable can be supplied with the sensor (length 2 or 5 m), fitted
with the pressed connector socket or dismountable connector socket without the cable (see acces
-
sories). In this case the cable is connected to the inside pins of the socket according to Fig. 10.
The sensor with related equipment is interconnected by a suitable three-core (P variation) or two-
core (S and R variations) cable. The length of the cable for the Xi and XiT variations must be
selected with respect to the maximum permitted parameters (usually inductance and capacity) of
the outside intrinsically safe circuit of supply units (NSSU, NDSU, NLCU). If using a dismountable
connector socket, the outside diameter of the cable is a maximum of 6 mm
Sensors CLS–23 are equipped with protection against over-voltages and current overload. The capacity
loads and low resistance (bulb) are evaluated by sensors with output type „P“ and „S“ as short circuit.
Sensors with output type „R“ are designed for interconnect to intrinsically safe supply units.
In case of strong ambient electromagnetic interference, paralleling of conductors with power distribu-
tion, or for the distribution to distance over 30 m, we recommend to use shielded cable.
Fig. 6: Auxiliary electrode in non-conductive tanks
