Riels RIL330 User manual

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Before the rst use of the level meter please read carefully the instructions provided in this User's Guide
and keep it for future use. The manufacturer reserves the right to make changes without previous notice.
INSTRUCTION MANUAL
Ultrasonic Level Meters RIL330
Ultrasonic Level Meters RIL33

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
1 . Basic description ......................................................................................................................4
2 . Range of application .................................................................................................................5
3 . Variants .....................................................................................................................................5
4 . Dimensional drawing.................................................................................................................5
5 . Installation and putting into operation .......................................................................................6
6 . Mechanical mounting ................................................................................................................6
7 . Electrical connection .................................................................................................................10
7.1. Connection through ISO connector...................................................................................10
7.2. Connection through M12 connector..................................................................................11
7.3. Connection via PG 11 gland or gland for protective hoses...............................................12
8 . Control elements .......................................................................................................................14
9 . Settings .....................................................................................................................................15
9.1. Setting procedure for level meters RIL330
........................................................................15
9.2. Setting procedure for level sensors RIL331 .....................................................................17
10 . Function and status indication.................................................................................................19
11 . Protocol Modbus®....................................................................................................................20
12 . Order code ..............................................................................................................................20
13 . Correct specication examples ...............................................................................................21
14 . Accessories.............................................................................................................................21
15 . Safety, protection, compatibility and explosion proof ..............................................................22
16 . Use, manipulation and maintenance.......................................................................................22
17 . General conditions and warranty ............................................................................................23
18 . Marking of labels .....................................................................................................................23
19 . Technical specications ..........................................................................................................25
19 . Packing, shipping and storage ................................................................................................27

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 
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 equipment or may cause injury.
Information
This symbol indicates particularly important characteristics of the device.
Note
This symbol indicates helpful additional information.


All operations described in this instruction manual have to be carried out by trained personnel
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.
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.
The RIL330 ultrasonic level meters and the RIL331 ultrasonic level sensors are
compact measurement devices containing an electro-acoustic transducer and an
electronic module.
Using the electro-acoustic transducer, level meters and level sensors transmit a series of
ultrasonic pulses that spread towards the surface. The transducer then receives the reected
acoustic wave, which is subsequently processed in the electronic module. The current distance
to the surface level is calculated from the time of spread of individual pulses towards the surface
and back and the temperature measured in the tank. The output is then set on the basis of the
surface height.
The outputs of the RIL330 level meter are current 4 -20 mA, voltage 0 - 10 V and industrial
line RS-485 with Modbus RTU communication. The output of the RIL331 sensor consists of a
PNP transistor with an open collector and a two-state current switch 4 mA / 20 mA.

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 
RIL330 –_ –01–_ measurement range 0.1 m to 1m, all-plastic design, source of PVDF
(polyvinylidene uoride), mechanical connection with thread G ¾.
–_ –02–_ measurement range 0.20 m to 2m, all-plastic design, source of PVDF,
mechanical connection with thread G 1''.
–_ –06–_ measurement range 0.20 m to 6m, all-plastic design, source of PVDF,
mechanical connection with thread G 1 ½".
–_ –10–_ measurement range 0.4 m to 10m, all-plastic case, source of PVDF,
mechanical connection with thread G 2 ¼“.
–_ –20–_ measurement range 0.5 m to 20m, all-plastic case, source of PVDF,
mechanical connection with ange of aluminium alloy.
 
Thanks to the contactless measuring principle ultrasonic level meters are suitable for continuous
measurement or limit level sensing of liquids, waste water, sludge, suspensions, adhesives, resins
in various open and closed vessels, sumps, open channels and drains. Use for organic solvents or
substances, which contain organic solvents, should be consulted with the manufacturer. Usability
for level measurement of solid materials is limited, there is a shorter measuring range. We recom-
mend using the level meter for such a medium to consult with the manufacturer. Setting is carried
out either using two buttons or a magnetic pen or by remote setting in case of Modbus RTU output.
The device is equipped with optical indication of its state (RUN) and the setting process (STATE). It
is manufactured in designs for normal (N) and explosive atmospheres (Xi).
 
RIL330–_–02–_ RIL330–_–06–_RIL330–_–01–_
In the case of use for an aggressive medium is necessary to prove the chemical compatibility
of used materials of the sensor (Tab. Used materials on page 27). The guarantee ceases when
the product is chemically damaged.
RIL330
RIL330
RIL330
RIL330

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ground
terminal
RIL330–_–10–_ RIL330–_–20–_
Al alloy
 
 
• The device is installed in a vertical position into the upper lid of the tank or reservoir using a
lug, a fastening nut or a ange in such a way that the axis of the device is perpendicular to the
surface level of the measured liquid (Fig. 1). Tightening of the level meter in the welding ange
(or. by the xing nut) must be done only by hand *. The device shall be installed in places
with no risk of mechanical damage to the front of the sensor.
• The minimum distance from the tank wall when installing into the lid or the ceiling of the tank
are listed in Fig. 3. In the case of device installation close to smooth wall of the tank it is not
necessary to observe the minimum distance, conversely it is suitable to shorten this distance.
• When installing in an open channel (sump, drain, etc.), install the device onto a console as
close as possible to the expected maximum level.
• The reference plane for the measurement is the lower edge of the transducer (Fig.2). In compli-
ance with the measuring principle, no signals reec ted in the are a directl y b elow the device
(dead zone) can be evaluated. The dead zone (Fig. 2) determines the minimum distance possible
between the device and the highest level. The minimum distances to the medium are listed in
the chapter "Technical specications".
• The device shall be installed so that the surface does not interfere with the dead zone when
the tank is lled to the maximum. If the measured surface interferes with the dead zone, the
device will not measure properly.
*) To loosen the level meter can be used suitable wrench.
Please follow next 3 steps:
• 
• 
• 
• 

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Fig. 1: Correct installation of the sensor,
perpendicular to the liquid surface
RIL330–01 ; 02 ; 10 d > c/12
(min. 200 mm)
RIL330–06 d > c/8
(min. 200 mm)
RIL330–20 d > c/10
(min. 200 mm)
d – distance from tank wall
c – maximum reach of the device
m – dead zone
Fig. 2: Dead zone of the
device
Fig. 3: Distance of the device
from the tank wall
reference plane for
the measurement
• D o n o t i n s t a l l t h e d e v i c e in or a b o v e
the lling p o int ( Fig. 4) . T h e m e as-
urement could be a󰀨ected by the
inowing medium.
Fig. 4: Installation of the device out of reach of lling circulation
It is recommended to avoid placing the sensor into a narrow neck.
• Only if the maximum level in the tank gets into the dead zone, the device shall be mounted into
a higher installation neck. The tank can be then lled nearly up to the maximum volume. The
neck’s inner surface shall be even and smooth (without edges and welded joints), the inner
edge should be rounded in the spot where the ultrasonic wave leaves the pipe. Choose the
largest possible neck diameter, but keep the neck height as low as possible. The recommended
dimensions of the inlet neck are listed in Fig. 5.
Fig. 5: Installation of the device in the installation neck
RIL330–01; 02; 06; 10 a < 1.5b
b > 100 mm
RIL330–20 a < 1.5 b
b > 150 mm
!
a – neck height from source edge
b – neck width
m – dead zone
min. 10 mm

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• If the level sensor is mounted into narrow necks and into places with obstacles, close uneven
walls or the lling area, where the transmission signal could be distorted, we recommend us-
ing a guide tube (acoustic horn). The tube must be made from a single material with a smooth
inner surface (see image 6 a 7). The minimum tube diameter must have the dimension „h“
according to see to table at image 7. The construction of the guide tube we recommend
to consult with the manufacturer.
Fig. 6: Short guide tube
installation
h
ventilation
holes
sleeves for
mounting
h
Fig. 7: Total guide
tube installation
RIL330–01 h ≥ 50 mm
RIL330–02 h ≥ 70 mm
RIL330–06 h ≥ 100 mm
RIL330–10 h ≥ 150 mm
RIL330–20 h ≥ 200 mm
Fig. 8: Horn adapter installation
Horn adapter ST
• The site for installing the level meter needs to be chosen so that the emitted acoustic
signal is not a󰀨ected by nearby objects (reinforcements, supports, brackets, ladders,
heating elements, mixers, etc.). These obstacles may result in false rebounds, increasing
measurement inaccuracy (Fig. 9).
x – distance from the edge of the longest object
c – maximum reach of the level meter
RIL330–01 ;02 ; 10 x > c/12
(min. 200 mm)
RIL330–06 x > c/8
(min. 200 mm)
RIL330–20 x > c/10
(min. 200 mm)
Fig. 9: Minimum distance from close objects in the tank
• Horn adapter for improved reception of the transmitted
signal can be used in open channels, sumps, tanks,
etc. ST–G0,75 (G1, G1,5, G2,25) by type RIL330.
• Horn adapter ST increases the directivity of the emitted
acoustic waves, improves the reception of weak echoes
(unstable surface level, loose materials, foam on the
level) and reduces the risk of false reections.
• The horn adapter is installed on the device via process
connection G3/4“ (ST–G0,75) or G1” (ST–G1) or G1½”
(ST–G1,5), or G 2 ¼“ (ST–G2,25).

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• Foam may be produced on the surface of the measured
liquid during lling, mixing and other processes. The thick
foam signicantly absorbs the ultrasound signal and may
cause malfunction of the device (Fig. 10). In those cases
it is necessary to test the device in advance or contact the
manufacturer . In case of a thin layer of foam, it is also
possible to use directional horn for improving receipt of the
reected echo.
!
Fig. 10: Thick foam on the surface
• The ultrasonic signal can be scattered or attenuated if
the surface is moderately stirred or rippled (due to a
mixer, inow of liquid, etc.). This may result in reduction
of the measurement range or unreliable operation of the
device (Fig. 11). For a rippled or swirling level, you can
use the directional horn to eliminate scattering of the
ultrasonic signal.
Fig. 11: Moderately stirred
surface
!
• False surface reections of the ultrasonic
signal and unreliable operation of the de-
vice might result from the mixer’s rotating
blades t h a t r i p p l e t h e s u r f ac e l e v e l (Fi g . 12) .
• The device should not be installed in places
with the risk of false reections of the
ultrasonic signal from the mixer’s blades
(Fig. 13).
!
Fig. 12: Strongly stirred
surface
Fig. 13: False reection
from mixer blades
• The measuring device shall not be installed in
places with direct sunlight and shall be protected
against weather conditions. Direct sunlight af-
fects the built-in temperature compensation!
• If installation in places with direct sunlight is
inevitable, it is necessary to mount a shielding
cover above the device (Fig. 14).
• It is advisable to keep cable under the cable
gland (s a g ging d own) a s show n in Fig. 15 to p re -
ven t p e n etrat i o n of m o i s ture. R a i n a n d c o n d ens-
ing water can be therefore drained away freely.
• The cable gland as well as the connector shall
be tightened su󰀩ciently to prevent penetra-
tion of moisture.
Fig. 14: Shielding cover against direct
sunlight
Fig. 15: Protection against
penetration of moisture

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 

wire cross-section 0.5 to 0.75 mm
2), via a detachable ISO connector
with inner screw terminals, which is part of the delivery. The
connection diagram and the inner view of the connector are
shown in Fig.16 and 17. Non-detachable connector IP67 with
PVC cable 5 m long can be supplied as an extra option.
Connecting the cable to the device:
1. Unscrew the connector from the device body using a suitable screwdriver.
2. Remove the inner part of the connector using a at screwdriver (insert the screwdriver in the
gap marked with an arrow).
3. Unscrew the cable gland and pull the supply cable inside the connector.
4. Connect the cable wires to the screw terminals as shown in Fig. 16 (current output 4-20 mA),
Fig. 17 (voltage output 0-10 V), Fig. 18 (S type output) or Fig. 19 (P) type output. Tighten the
terminals rmly.
5. Insert the terminals back in the connector so that the NC terminal points away from the cable
gland. Fasten the cable gland.
6. Check the sealing on the connector and attach the connector back to the device body.
Valid for: RIL33_-_-_ _-_-_-G-_
Performance„G“
with connector ISO
0 V (2)
+U (1)
meter (variant –I) and inside view of the connector
BN ()1
BU ()2
mA +U
0V
V
+U
0V
U
Uout
V
+U
0V
U
Uout
mA +U
0V
0V
BN (1)
BU (2)
+U
0V
BN (1)
BU (3)
BK (4)
BN ()1
BU (3)
BN ()1
BU ()2
BK (3)
BN ()1
BU (3)
BK (4)
BN ()1
BU ()2
mA +U
0V
mA +U
0V
BN ()1
BU (3)
Uout (3)
+U (1)
0 V (2)
BN ()1
BU ()2
mA +U
0V
V
+U
0V
U
Uout
V
+U
0V
U
Uout
mA +U
0V
+U
0V
BN (1)
BU (2)
BK (3)
+U
0V
BN (1)
BU (3)
BK (4)
BN ()1
BU (3)
BN ()1
BU ()2
BK (3)
BN ()1
BU (3)
BK (4)
BN ()1
BU ()2
mA +U
0V
mA +U
0V
BN ()1
BU (3)
+U (1)
Fig. 18: Connection diagram of the RIL331 sensor with S
type output (two-state current switch 4 mA / 20 mA)
BN ()1
BU ()2
mA +U
0V
V
+U
0V
U
Uout
V
+U
0V
U
Uout
mA +U
0V
+U
0V
BN (1)
BU (2)
BK (3)
+U
0V
BN (1)
BU (3)
BK (4)
BN ()1
BU (3)
BN ()1
BU ()2
BK (3)
BN ()1
BU (3)
BK (4)
BN ()1
BU ()2
mA +U
0V
mA +U
0V
BN ()1
BU (3)
0 V (2)
Type RIL331–_–_ _–_–S–G–_
Positive supply pole +U is connected
to the brown wire or to connector pin
1, negative pole to the blue wire or to
connector pin 2.
The RIL330 level meter or RIL331 level sensor with a G type
cable gland are connected to processing (display) units by
means of a cable with an outer diameter of 6 to 8 mm (recommended
Fig. 16: Connection diagram of the RIL330 level Fig. 17: Connection diagram of the RIL330 level
meter (variant –U) and inside view of the connector