AFRISO SonarFox UST 20 User manual
Version: 04.2021.0
ID: 900.100.0991
Lindenstraße20
74363Güglingen
Phone+497135102-0
Service+497135102-211
Telefax+497135102-147
info@afriso.com
www.afriso.com
Copyright 2021 AFRISO-EURO-INDEX GmbH. All rights reserved.
0123
Operating
instructions
Ultrasonic level indicator
SonarFox® UST 20
SonarFox UST 20 AFRISO
2
Content
1 . About these operating instructions ......................................................................... 4
2 . Information on safety ................................................................................................ 4
3 . Transport and storage ............................................................................................... 6
5 . Mounting ..................................................................................................................... 8
6 . Electrical connection ................................................................................................. 13
7 . Operating elements ................................................................................................... 15
8 . Settings ....................................................................................................................... 16
9 . HART®communikation protocol .............................................................................. 24
10 . Modbus® protocol ................................................................................................... 25
11 . Ordering data ............................................................................................................ 26
12 . Accessories .............................................................................................................. 26
13 . Safety, Protections, Compatibility and Explosion safety ..................................... 27
17 . Indications on the nameplate ................................................................................. 28
18 . Menu structure ......................................................................................................... 30
19 . Technical specications .......................................................................................... 31
20 . EU Declaration of Conformity ................................................................................. 34
21 . EU-Type Examination Certicate ............................................................................ 36
SonarFox UST 20 AFRISO
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1 . About these operating instructions
These operating instructions describe the ultrasonic level meter UST-20 (also referred to as "pro-
duct" in these operating instructions). These operating instructions are part of the product.
• You may only use the product if you have fully read and understood these operating instruc-
tions.
• Verify that these operating instructions are always accessible for any type of work performed
on or with the product.
• Pass these operating instructions as well as all other product-related documents on to all
owners of the product.
• If you feel that these operating instructions contain errors, inconsistencies, ambiguities or
other issues, contact the manufacturer prior to using the product.
These operating instructions are protected by copyright and may only be used as provided for by
the corresponding copyright legislation. We reserve the right to modications.
The manufacturer shall not be liable in any form whatsoever for direct or consequential damage
resulting from failure to observe these operating instructions or from failure to comply with directi-
ves, regulations and standards and any other statutory requirements applicable at the installation
site of the product.
2 . Information on safety
2 .1 . Safety messages and hazard categories
These operating instructions contain safety messages to alert you to potential hazards and risks.
In addition to the instructions provided in these operating instructions, you must comply with all
directives, standards and safety regulations applicable at the installation site of the product. Verify
that you are familiar with all directives, standards and safety regulations and ensure compliance
with them prior to using the product.
Safety messages in these operating instructions are highlighted with warning symbols and warn-
ing words. Depending on the severity of a hazard, the safety messages are classied according to
dierent hazard categories.
DANGER
DANGER indicates a hazardous situation, which, if not avoided, will result in death or
serious injury.
NOTICE
NOTICE indicates a hazardous situation, which, if not avoided, can result in equipment
damage.
In addition, the following symbols are used in these operating instructions::
This is the general safety alert symbol. It alerts to injury hazards or equipment
damage. Comply with all safety instructions in conjunction with this symbol to
help avoid possible death, injury or equipment damage.
This symbol alerts to hazardous electrical voltage. If this symbol is used in a
safety message, there is a hazard of electric shock.
This symbol alerts to general information.
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AFRISO SonarFox UST 20
2 .2 . Intended use
This product may be used for non-contact level measurement of liquid, mushy and pasty media in
open or closed containers, tanks or silos.
Any use other than the application explicitly permitted in these operating instructions is not permit-
ted and causes hazards.
Verify that the product is suitable for the application planned by you prior to using the product. In
doing so, take into account at least the following:
• All directives, standards and safety regulations applicable at the installation site of the product
• All conditions and data specied for the product
• The conditions of the planned application
In addition, perform a risk assessment in view of the planned application, according to an ap-
proved risk assessment method, and implement the appropriate safety measures, based on the
results of the risk assessment. Take into account the consequences of installing or integrating the
product into a system or a plant.
When using the product, perform all work and all other activities in conjunction with the product in
compliance with the conditions specied in the operating instructions and on the nameplate, as
well as with all directives, standards and safety regulations applicable at the installation site of the
product.
2 .3 . Predictable incorrect application
The product must never be used in the following cases and for the following purposes:
• Measurements of acoustically diuse surfaces (foam, bulk material)
• Use as overll prevention system according to WHG
2 .4 . Qualification of personnel
Only appropriately trained persons who are familiar with and understand the contents of these
operating instructions and all other pertinent product documentation are authorized to mount,
commission, maintain and decommission this product.
These persons must have sucient technical training, knowledge and experience and be able to
foresee and detect potential hazards that may be caused by using the product.
All persons working on and with the product must be fully familiar with all directives, standards
and safety regulations that must be observed for performing such work.
2 .5 . Personal protective equipment
Always wear the required personal protective equipment. When performing work on and with the
product, take into account that hazards may be present at the installation site which do not directly
result from the product itself.
2 .6 . Modifications to the product
Only perform work on and with the product which is explicitly described in these operating instruc-
tions. Do not make any modications to the product which are not described in these operating
instructions.
SonarFox UST 20 AFRISO
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3 . Transport and storage
The product may be damaged as a result of improper transport or storage.
NOTICE
INCORRECT HANDLING
• Verify compliance with the specied ambient conditions during transport or storage of the
product.
• Use the original packaging when transporting the product.
• Store the product in a clean and dry environment.
• Verify that the product is protected against shocks and impact during transport and storage.
Failure to follow these instructions can result in equipment damage.
Store the device in its original packaging in dry areas covered from weather conditions, with
humidity of up to 85 % without eects of chemically active substances. The storage temperature
range is -10 °C to +50 °C.
4 . Product description
4 .1 . Measuring principle
The product is intended for non-contact measurement of level, distance and volumn. The product
works according to the echo transit time method.
Communication with the product is possible either via an integrated RS 485 interface (Modbus
RTU) or via the HART protocol. This allows parameter data to be received, saved, changed and
transferred back to the product.
Measurement of bulk material is limited.
4 .2 . Variants of Level Sensors
• UST 20_–01 Measuring range 0.15 – 2 m, 120 kHz, plastic PP, mechanical connection
with thread G1.
• UST 20_–11 Measuring range 0.25 – 6 m,, 75 kHz, plastic PP, mechanical connection
with thread G1½.
• UST 20_–21 Measuring range 0.4 – 10 m, 50 kHz, plastic PP, mechanical connection
with thread G2¼.
• UST 20_–31 Measuring range 0.5 – 20 m, 30 kHz, aluminium alloy ange EN 1092-1
DN100 PN16.
The product is also produced in explosion-proof version:
• EX – intrinsically safe explosion-proof version for or use in hazardous areas (gas and dust EX)
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AFRISO SonarFox UST 20
4 .3 . Dimensions
UST 20_–01 UST 20_–11 UST 20_–21
UST 20_–31 Variant UST 20 with
protective conductor
cable gland
M16x1,5
Ground
terminal
aluminium alloy
SonarFox UST 20 AFRISO
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5 . Mounting
⇒Verify that the product is protected from direct sunlight and other heat sources.
⇒Verify that the product is protected from direct weather when installed outdoors.
⇒Verify that the environmental conditions are observed.
Fig. 1: Weather protection in direct sunlight
Fig. 2: Avoid penetration of moisture
It is suitable to run the cable under a cable bushing
(obliquely down in slack) to prevent
penetration of humidity. Then the rain and condensing
water can ow o freely.
5 .1 . Preparing mounting
The product is mounted in the container using a welding ange, fastening nut or ange. In the
case of closed containers, the product must be installed in such a way that the sensor face cannot
be ooded.
The sensor face of the product is the starting point for level measurement. The dead zone (see
technical data) determines the minimum distance between the sensor face and the maximum
lling level.
⇒Verify that there are no xtures, welds or similar within the beam angle.
⇒Verify that the sensor face of the product is mounted perpendicular to the surface of the
medium.
⇒Verify that the product is attached to a bracket (e.g. mounting bracket) with open channels or
collecting containers.
Fig. 3: Recommended installation in the tank
Mount the product in a way that the dead zone
is not reached even when it is lled to the
maximum. The product cannot measure in the
area of the dead zone.
UST 20-01, -21 d > 1/12 c (min. 200 mm)
UST 20-11 d > 1/8 c (min. 200 mm)
UST 20-31 d > 1/10 c (min. 200 mm)
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AFRISO SonarFox UST 20
Fig. 4: Level meter dead zone
m = Dead zone
A = reference plane for the measurement
Fig. 5: Distance from the tank wall
d = Distance from the tank wall
c = Maximum reach of the level meter
Installation in closed containers
When installing in closed containers, the sensor face must not be ooded. Use a pipe socket if the
distance cannot be maintained in any other way.
Fig. 6: Possible installation in the container
a = Height of pipe socket
b = Wide pipe socket
m = Dead zone (Incorrect
measurement)
UST 20-01, -11 a < 3 b
b > 100 mm
UST 20-21 a < 1,5 b
b > 100 mm
UST 20-31 a < 1,5 b
b > 150 mm
Vessel installations
Vessel installations can cause strong false echoes that are superimposed over the useful echo
signals (roughness on container walls, various partitions, agitator etc.) It is necessary to map false
reections by activating the mode "TEACHING".
In case of installed mixers, it is necessary to put the mixers to position under the level meter (di-
rect the agitator paddle to the ultrasonic signal beam).
A
SonarFox UST 20 AFRISO
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Fig. 7: False echoes of obstacles Fig. 8: Flse echoes of agitator paddle
Installation with inowing medium
Do not install the level meter in or above the lling point.
Foam formation
Fig. 9: Foam on the surface
During lling, mixing and other processes,
foam can arise on the surface level of the
measured liquid.
The foam considerably absorbs the ultrasonic
signal which might cause malfunction of the
level meter. For such cases, it is necessary to
set up "SENSITIVITY" mode to "high" or con-
tact the manufacturer if need.
In case of a thin layer of foam, it is also pos-
sible to use the directional horn for improving
receipt of the reected echo.
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