RST DLS-35 Series User manual

Read the instructions published in this manual carefully before the rst use of the sensor.
Keep the manual in a safe place. The manufacturer reserves the right to make changes without prior notice.
INSTRUCTION MaNUal
CapaCitive level sensors Dls–35

CONTENT
1. Brief ............................................................................................................................................4
2. Variants of sensors .....................................................................................................................5
3. Dimensional drawings ................................................................................................................6
4. Mounting recommendation.........................................................................................................8
5. Range of application...................................................................................................................12
6. Electrical connection...................................................................................................................13
7. Sensor settings...........................................................................................................................15
8. Function and status signalization ...............................................................................................17
9. Order code..................................................................................................................................18
10. Correct specication examples.................................................................................................18
11. Accessories...............................................................................................................................19
12. Safety, protections, compatibility and explosion proof..............................................................19
13. Use, manipulation and maintenance ........................................................................................19
14. General conditions and warranty..............................................................................................19
15. Marking of labels ......................................................................................................................20
16. Specications ...........................................................................................................................22
17. Packaging, shipping and storage .............................................................................................23

DLS–35 © Dinel, s.r.o.
4
All operations described in this instruction manual have to be carried out by trained person-
nel or by an accredited person only. Warranty and post warranty service must be exclusively
carried out by the manufacturer.
Improper use, installation or set-up of the sensor can lead to crashes in the application,
(overlling of the tank or damage of system components).
The manufacturer is not responsible for improper use, loss of work caused by either direct
or indirect damage, and for expenses incurred at the time of installation or during the period
of use of the level sensors.
Safety
USed SymbolS
To ensure maximum safety of control processes, we have dened the following safety instructions
and information. Each instruction is labelled with the appropriate pictogram.
Alert, warning, danger
This symbol informs you about particularly important instructions for installation and operation
of equipment or dangerous situations that may occur during the installation and operation.
Not observing these instructions may cause disturbance, damage or destruction of equip-
ment or may cause injury.
Information
This symbol indicates particularly important characteristics of the device.
Note
This symbol indicates helpful additional information.
1 . brief
Capacitive level sensors DLS® are designed for limit sensing of the level of liquids and bulk solids in
tanks, tubes, hoppers, silos, sumps, etc. The sensors are made in several modication of sensing
electrodes (bar, rod and rope). The electrodes can be given an insulating coating, a useful feature
in case of adhesive, aggressive or conductive media sensing.
Sensors are manufactured in the following designs: N – for non-explosive areas, NT– high-temperature
design for non-explosive areas.

5
© Dinel, s.r.o. DLS–35
2 . VariantS of SenSorS
DLS–35_–10 Uncoated short bar electrode for sensing non-adhesive bulk solids (sand, sugar)
and non-conductive liquids (petroleum products, oils). Horizontal mounting.
Electrode length 50 mm or 100 mm.
DLS–35_–11 Fully coated short bar electrode, for sensing conductive liquids (water).
Horizontal mounting into tanks and tubes.
Electrode length 30 mm.
DLS–35_–14 like DLS-35_-10, but higher pressure resistance
DLS–35_–20
Semi-coated rod electrode for sensing slightly adhesive bulk solids (cement,
our) and non-conductive liquids. Horizontal, slant or vertical mounting.
Electrode length 0.1 m ... 1 m.
DLS–35_–21 Fully coated rod electrode (FEP insulation) for sensing conductive liquids
(water solutions, water), adhesive and aggressive materials. Horizontal or
vertical mounting.
Electrode length 0.1 m ... 1 m.
DLS–35_–22
Fully coated rod electrode (PFA insulation) with enhanced resistance to
permeation (diffusion) of vapours and gases. For measuring the level of water
and other conductive liquids in the food, pharmaceutical and chemical industries.
Suitable for high-temperature applications (hot steam), volatile aggressive
liquids, etc. Horizontal or vertical mounting. Electrode length 0.1 m ... 1 m.
DLS–35_–23 like DLS-35_-20, but higher pressure resistance
DLS–35_–24 like DLS-35_-21, but higher pressure resistance
DLS–35_–25 like DLS-35_-22, but higher pressure resistance
DLS–35_–30 Dismountable uncoated rod electrode for sensing bulk solids and conductive
or non-conductive liquids. Vertical or horizontal slant mounting.
Electrode length 0.1 m ... 3 m.
DLS–35_–31 Fully coated rod electrode for sensing aggressive conductive liquids (water,
chemicals). Vertical mounting.
Electrode length 0.1 m ... 3 m.
DLS–35_–40 Uncoated stainless steel rod electrode with reference tube, for sensing non-
conductive liquids (petroleum products, oil) in non-conductive tanks. Vertical
mounting. Maximum electrode length 1 m.
DLS–35_–41 Fully coated stainless steel rod electrode with reference tube, for sensing
conductive liquids in non-conductive tanks. Vertical mounting. Maximum
electrode length 1 m.
DLS–35_–43 like DLS-35_-40, but higher pressure resistance
DLS–35_–44 like DLS-35_-41, but higher pressure resistance
DLS–35_–50
Uncoated rope electrode and weight for general purpose in deeper storage
tanks (bulk solids sensing e.g. sand, gravel, cement) or sumps (sensing liquids).
Vertical mounting.
Maximum electrode length 6 m.

DLS–35 © Dinel, s.r.o.
6
3 . dimenSional drawingS
DLS – 35_ – 10, 14 DLS – 35_ – 11 DLS – 35_ – 20, 23 DLS – 35_ – 21, 22,
24, 25
thread *
* types of threads: G 3/4''
M27x2
M30x1.5
NPT 3/4
 3510
13
10
42
E50 / E100
22
15
35
16
36
6,5
64
E100 - E1000
10
10
6
4646
E100 - E3000
E100 - E3000
8
DLS – 35_ – 30 DLS – 35_ – 31
13
30
E100 - E1000
E/3
10
8
Measuring electrode
Insulating bushing
Sensor housing
End of sensor
Cable gland

7
© Dinel, s.r.o. DLS–35
DLS – 35_ – 40, 43 DLS – 35_ – 41, 44 DLS – 35_ – 50
Design “A” with short stainless
steel gland Design "B" with plastic
threaded cable gland
Design "C"
with connector M12
+
-
6,5
12
18
12
20
+
-
15
20
+
-
M12
13
22
105
E500 - E6000
50 10
3
5
Design „H“ with cable gland for protected
hoses – for use in an outdoor environment
or in an area with increased moisture.
Design “V” with plastic cable gland
with spiral relief – in case of increased
mechanical wear on the cable.
spiral relief
protective hose
(ø 13 mm)

DLS–35 © Dinel, s.r.o.
8
4 . moUnting recommendationS
DLS® level sensors can be xed in a vertical, horizontal or slanted position into the wall of a vessel,
storage tank or on a xation console in a sump by screwing into the welding ange, using a xing
nut or TriClamp®process connection.
Basic application recommendations are mentioned below.
During assembly into the metal tank or the storage tank, it is not necessary to separately ground the base
of the level sensor. In case of installation in concrete sumps or silos, it is appropriate to install the level
sensor onto a metallic auxiliary construction (console, lid, etc.), and then connect to a metallic, constantly
submerged object, or with steel with steel reinforcements in concrete (armouring).
In the case of the reading of an aggressive medium, we recommend that the producer be consulted.
If the sensors are  tted with protective caps at the ends of the electrodes, remove the caps
before commissioning.
In case of vertical mounting, sensors can be mounted into open,
closed and pressurized tanks. The stated distances relate to the
electrode length (longer electrode).
All vertically mounted sensors
mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









E– Electrode length in mm
Figure 1: Vertical mounting
Figure 2: Correct and incorrect installation with a long tube
In the case of side wall mounting. it
is necessary to avoid long tting tubes,
where sensed medium could accumulate
(g. on right). We recommend mounting
the sensor so that the whole sensing
electrode and insulation is inside the
storage tank (Figure 2 – on left).
All from side mounted sensors
k
d
E
c

9
© Dinel, s.r.o. DLS–35
m
p
s
E
Figure 3: Correct and incorrect installation into storage tank side wall
mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









E– Electrode length in mm
Figure 4: Protective roof mounting
Protective roof mounting is recommended to prevent
mechanical damage of the sensor electrode when
vertical movement of material could damage the
sensing electrode (abrasive materials, bulk-solid
materials forming blocks, piece goods).
For: DLS–35_–10, 14, 20, 23
All from side mounted sensors
In case of side wall mounting (Fig. 3), place the sensor
outside the ow of bulk solids or liquids.
In the case of slant wall mounting it is necessary to eliminate tting tubes, thereby reducing
medium sedimentation. The wrong example of mounting is shown in Figure 5 on the left. The ap-
propriate mounting on the auxiliary vertical plate is shown in the middle. In some cases the variant
is allowed as shown in Fig. 5 on the right. But this is recommended only for measuring bulk-solid
materials by a sensor of the DLS–35_–10 type, which do not mechanically damage the electrode
and do not form separate blocks.
For types: DLS–35_–10, 14, 20, 23
Figure 5: Slant wall mounting
DLS–35_–10
!

DLS–35 © Dinel, s.r.o.
10
h
In case of vertical installation for sensing the level
of unknown (conductive and non-conductive)
liquids in tanks or sumps, it is appropriate to bend
the electrode into a right angle. This will increase
the local sensitivity and accuracy of sensing the
level at the spot of the bend.
For: DLS–35_–30
h = 50 to 200 mm
Figure 7: Bending of the electrode end to sense
unknown uids
When weather conditions (wind, rain, snow) clearly
inuence the electrode (open sumps), we recom-
mend using types with an insulated electrode
(DLS-35_-21,22,24,25,31).
mm20050h
E
3
2
m
E
4
3
p
E
3
4
s
E
3
1
E
10
1
a
20
E
40b
50
E
10c
40
E
40d
20
E
20k









Mounting in a bypass measuring tube. We recommend upholding the tube diameter.
For types: DLS–35_–20,21,22,23,24,25, 30, 31
E– Electrode length in mm
Figure 8: Bypass measuring tube
b
E