AFRISO SonarFox UST 20 User manual

Version: 04.2021.0
ID: 900.100.0991
Lindenstraße20
74363Güglingen
Phone[phone]
Service+497135102-211
Telefax+497135102-147
[e-mail]
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 specications .......................................................................................... 31
20 . EU Declaration of Conformity ................................................................................. 34
21 . EU-Type Examination Certicate ............................................................................ 36

SonarFox UST 20 AFRISO
4
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 modications.
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 classied according to
di󰀨erent 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.

5
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 specied 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 specied 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 di󰀨use surfaces (foam, bulk material)
• Use as overll 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 su󰀩cient 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 modications to the product which are not described in these operating
instructions.

SonarFox UST 20 AFRISO
6
3 . Transport and storage
The product may be damaged as a result of improper transport or storage.
NOTICE
INCORRECT HANDLING
• Verify compliance with the specied 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 e󰀨ects 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)

7
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)

9
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
reections 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 inowing 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 reected echo.

11
AFRISO SonarFox UST 20
Installation in silo or storage reservoir
Fig. 10: Installation in silo or hopper
In case the level of bulk solids is measured,
the measurement range is reduced Due to
absorption of acoustic waves by a bulk me-
dium, shortening of the measuring range
occurs by up to 50 % depending on the grain
size.
We therefore recommend selecting a level
meter with greater range than the maximum
range of measuring the medium. It is also ap-
propriate to use a directional horn, which re-
duces the shortening of the measuring range,
because it better concentrates acoustic energy
while preserving the same beam angle, and
improves the sensitivity when receiving the
reected echo.
Installation on uneven and wavy surfaces
Fig. 11: Moderately stirred surface
If the surface is slightly uneven or wavy (due
to agitator or lling ow), there may be interfer-
ing reections.
Fig. 12: Intensely stirred surface
The surface can be whirled up by the rotat-
ing blades of the agitator and this can lead to
interfering reections.
In the case of uneven surfaces, you must
perform a false signal suppression.
Measuring tunnel

SonarFox UST 20 AFRISO
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Installation in standpipe
Fig. 13: Installation in standpipe
By using a standpipe, the e󰀨ects of tank instal-
lations, foam formation and turbulence can be
prevented.
The standpipe must be made of a material
with a smooth inner surface. After installation,
you must perform a false signal suppression
using the "LEARN" menu item.
When using pipe sockets that protrude into the
closed container, the stand pipe must end at a
45° angle (Fig. 13 righthand).
Measurement in the standpipe is not suitable
for bulk solids that tend to adhere strongly.
ventilation holes
sleeves for
mounting

13
AFRISO SonarFox UST 20
6 . Electrical connection
DANGER
ELECTRIC SHOCK
• Verify that the degree of protection against electric shock (protection class, double insulation)
is not reduced by the type of electrical installation.
Failure to follow these instructions will result in death or serious injury.
DANGER
ELECTRIC SHOCK CAUSED BY LIVE PARTS
• Disconnect the mains voltage supply before performing the work and ensure that it cannot be
switched on.
• Verify that no hazards can be caused by electrically conductive objects or media.
• Products in the Ex area must be earthed.
Failure to follow these instructions will result in death or serious injury.
The product is connected to the downstream device (evaluation device) with a standard two-core
cable (2 x 0.5 ... 0.75 mm²) without shielding.
1. Use 2 pc. 2 × 0,25 mm² (twisted double-circuit line, shielded) for versions with Modbus commu-
nication.
If the product is connected to the RS-485 line as a terminal device with Modbus communication,
the installation of a terminating resistor 120 Ω is recommended. Set the lever labeled 120 Ω to the
ON position. Terminating resistors are not connected for products that are connected to the RS-
485 line as continuous devices.
Connect cable to the product
1. Unscrew the nut of the upper transparent lid.
2. Take the upper edge of the display module and take it out carefully by mild swinging up.
- If you cannot grasp the module, you can use a small screwdriver. Insert it as far as the
seam and use from several sides to slightly lift the module.
3. Loosen the cable gland and lead the cable through the cable gland under the display module.
4. Connect the phase to the + terminal and the neutral conductor to the - termina.
5. In the case of shielded cables, connect the shield to the ground terminal.
6. Connect communication lines A and B of the RS-485 line (for version "M" - Modbus) to termi-
nals A and B .
7. Tighten the terminals and the cable gland.
- For tightening torque, see technical parameters.
8. Insert the display module back into the head so that the connector is properly connected.
9. Slide silicone seal on the thread of the level meter body.
10. Tighten the nut of the upper lid
11. Connect the cable to downstream devices

SonarFox UST 20 AFRISO
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Fig. 14: Electrical connection 4-20 mA
• +U to terminal (+)
• 0 V to terminal (-)
• Shield (only
shielded cables ) to termial
GND
In case of strong ambient electromagnetic interference, paralleling of conductors
with power distribution, or for the distribution to distance over 30 m, we recommend
using shielded cable.
Inside view of screw terminals
• A = Metal clip
• B = Display unit connector
• C = Terminal block
Fig. 15: Electrical connection Modbus
+ABIS
GND
ON
120
• +U to terminal (+)
• 0 V to terminal (-)
• Shield (only
shielded cables ) to termial
GND
• Communication wires A
• and B of the line RS-485 (for version "M"
- Modbus) are connected to the terminals
A and B.
During electrical installation, measures must also be taken to reduce the e󰀨ects
of static electricity to a safe level.
The product must be installed in accordance with EN 60079-14 in potentially
explosive atmospheres (Electrical installations for explosive gaseous atmos-
pheres - Part 14).
A
B
C
Display unit connector
Terminal blocks
Metal clip
Switch 120 Ω

15
AFRISO SonarFox UST 20
7 . Operating elements
Settings are performed using 3 buttons located on the display module.
Button
• Set-up mode access
• Conrmation of selected menu item
Saving of set-up data
Button
• Navigation in the menu
• Change values
Button
• Cancelling of carried out changes
• Switch on upper level
measured values
Operatin elements
Teaching
mode activation Units
Echo receiving* product locked
* Slow ashing while the reected signal (echo) is received from the measured level.
Display Funktion
"NO ECHO" ashing – the product cannot receive an echo for a long period of time. Incorrect
installation of the product
"DEAD ZONE" ashing – the measured level is within the dead zone or the sensor surface is
contaminated.
"NO PASSWORD The product is ptotected against unauthorized setting. Enter password
Symbol "T" 1) Illuminates continuously – "LEARNING" mode is activated.
Symbol "E" 1) ashing – orrect reception of the reected echo.
Symbol 1)
Illuminates continuously – The product is ptotected against unauthorized setting. Enter
password to unlock the product.
1) Icon is shown in the lower left corner of the display

SonarFox UST 20 AFRISO
16
8 . Settings
The product is manually controlled using 3 buttons located on the
removable display module.
The text "SAVED" at the bottom of the display indicates that the values
have been saved. Values not conrmed by pressing button will not be
saved! After 5 minutes of inactivity, the level meter automatically switches
back to the measuring mode. If the password is activated, the level meter
will also lock itself. Once it is locked, it is not possible to make any
changes to the settings. When any editing is attempted, the display will
show the text "NO PASSWORD". The unlocking procedure is described
on page 23.
After connecting the supply voltage, the product display will show the manufacturer's logo and
the text "Starting" (approx. 30 s). Then the menu switches to the measuring mode and the display
shows the current measured value.
Basic settings
The basic setting is required after the product has been commissioned
for the rst time (Setting the measuring range, selecting the units or
damping, sensitivity and teaching).
MIN LEVEL and MAX LEVEL
The minimum / maximum distance to the level is set here („LEVEL“ for currents 4 mA / 20 mA),
Then the value can be assigned on the display under the menu item "DISPLAY". The units are set
in the "UNITS" menu.
MIN CURRENT LEVEL
02870mm
OUTPUT: 04.00 mA
LEVEL 06000 mm
DISPLAY: 00000 %
MAX CURRENT LEVEL
02870mm
OUTPUT: 20:00 mA
LEVEL 00250 mm
DISPLAY: 00100 %
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
• CURRENT: currently measured
distance to the level
• OUTPUT: Current 4 mA / 20 mA
• LEVEL: Denition OF MIN/MAX
distance to the level
• DISPLAY: Value on the display
If the message "OUT OF LIMITS" appears in the lower part of the display when entering values,
then the value entered in the "LEVEL" menu item is outside the measuring range. If the message
"PAN TOO SMALL" appears, enter a larger range of min / max values, see chapter. "Specica-
tions".
The decimal point position is xed in the menu item "LEVEL" is xed in the menu item "LEVEL"
(based on the selected units). The position of the menu item “DISPLAY” is freely adjustable.
1. Press the OK button to open the "BASIC SETTINGS" menu.
2. Use the arrow buttons to select the "MIN LEVEL" or "MAX LEVEL" menu and press OK.
3. Press the OK button and the arrow buttons to set the distance for the dened current "LEVEL".
The value is shown on the "DISPLAY" display.
4. Press the OK button to save the values.
5. Press the ESC button to exit the menu. The product switches back to the measurement mode.
STARTING
AFRISO®
UNITS
UNITS mm
DISPLAY: %
SAVED
BASIC SETTINGS
SERVICE
DIAGNOSTIC
CLONE SETTINGS
PASSWORD
LANGUAGE
INFO

17
AFRISO SonarFox UST 20
UNITS
The product can display and calculate a large number of physical quantities. The setting is made
in the "UNITS" menu.
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
UNITS
LEVEL mm
DISPLAY: %
LEVEL: Unit selection (mm, cm, m, in, ft)
DISPLAY: unit shown on the display
(%, mm, cm, m, in, ft, l, hl, m3, gal, bbl,
mA)
1. Press the OK button to open the "BASIC SETTINGS" menu.
2. Use the arrow buttons to select the „UNIS“ and press OK.
3. Press the OK button and the arrow buttons to set the units.
4. Press the OK button to save the values.
5. Press the ESC button to exit the menu. The product switches back to the measurement mode.
DAMPING
Setting of the echo velocity during the measurement. The function suppresses unstable display
with unsteady input of rapid or sudden level changes. (e.g surface turbulence). The subsequent
reaction time depends on the exponential curve. The damping with a dened delay in seconds
describes the period in which the exponential curve reaches 2/3 of its maximum value.
DAMPING
05
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
The damping time can be set in a range
of 0 to 99 s.
1. Press the OK button to open the "BASIC SETTINGS" menu.
2. Use the arrow buttons to select the „DAMPING“ and press OK.
3. Press the OK button and the arrow buttons to set damping in secunds.
4. Press the OK button to save the values.
5. Press the ESC button to exit the menu. The product switches back to the measurement mode.
SENSITIVITY
Sensitivity level meter is dened in four steps:
• "LOW“ – reduced sensitivity in case of environmental disturbances which impair the measure-
ment.
• "MEDIUM“ – medium sensitivity (suitable for most applications).
• "HIGH“ – increased sensitivity 󰀨or media that partially reduce the echo (foam).
SENSITIVITY
LOW
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
You can set the sensitivity in four de-
grees:
LOW – MEDIUM – HIGH.
1. Press the OK button to open the "BASIC SETTINGS" menu.
2. Use the arrow buttons to select the „SENSITIVITY“ and press OK.

SonarFox UST 20 AFRISO
18
3. Press the OK button and the arrow buttons to set the sensitivity
4. Press the OK button to change from „SENSITIVITY“ to the sub menu USER. The arrow keys can
be used to navigate between the sensitivity levels.
5. Press the OK button to save the values.
6. Press the ESC button to exit the menu. The product switches back to the measurement mode.
TEACHING
This operation mode is to false echo avoidance. Partition walls, agitators or other obstacles can
inuence the reection. After activating this operating mode, false echoes are automatically recog-
nized and masked out.
TEACHING
MIN LEVEL
MAX LEVEL
UNITS
DAMPING
SENSITIVITY
TEACHING
If there are no signicant obstacles in
the tank, this operating mode is not
necessary.
1. Press the OK button to open the "BASIC SETTINGS" menu.
2. Use the arrow buttons to select the „TEACHING“ and press OK.
3. Press the OK button. The display shows the query whether the menu should be started.
4. Press the OK button to start the menu.
During the acquisition, the message "RUNNING" ashes on the display. When the false echo has
been detected, the display shows the message "DONE".
5. Press the ESC button to exit the menu. The product switches back to the measurement mode.
TEACHING
EMPTY TANK:
06000 mm
RUNNING DONE
PRESS TO EXIT ESC
TEACHING: The mode "TEACHING" will stop auto-
matically after ca. 1000 measurements.
If during the scanning of the tank in the bottom of the display appears the dialog "press OK to
stop" (see gure) the level meter already found no further obstacles and "TEACHING" mode may
be terminated. If it is not terminated, the level meter is still ready for the possible presence of
obstacles (e.g. paddles of the agitator).
Once it registers a further obstacle, the dialogue disappears and the
obstacle is erased. This process may be repeated up to 1000 cycles.
After this the "TEACHING" mode is automatically stopped.
TEACHING:
EMPTY TANK:
06000 mm
BACK OK
EMPTY TANK:

19
AFRISO SonarFox UST 20
Before starting the mode it is necessary to empty
the tank as much as possible (preferably comple-
tely).
In case of installed agitator, it is necessary to posi-
tion the agitator under the level meter (direct the
agitator blade to the ultrasonic signal beam).
Note: If there are signicant obstacles in the upper
half of the tank, multiple false reections can occur
especially in closed tanks. In such cases it is ne-
cessary to reduce the level in the tank as much as
possible to correctly mask these possible multiple
false reections.
1/2 of Tank
obstacles
Tolerance zone for
"LEVEL DISTANCE" value
distance to surface
Fig. 16: Enter value „Set level distance
8 .1 . Service settings
The following points can be set or evaluated in the service setting:
• Length of the electrode
• Electrode type
• Change or shortening of the electrode
• Fault conditions of HART®, MODBUS communication
• Default setting
• Reset
BASIC SETTINGS
SERVICE
DIAGNOSTIC
CLONE SETTINGS
PASSWORD
LANGUAGE
INFO
MEDIUM TEMPERATURE
If for instance in the tank there is a di󰀨erence of 10 °C between the temperature of the measured
material (medium) and the temperature at the mounting site of the level meter (see the mode
"DIAGNOSTICS), the measuring accuracy will be reduced by around 1 % of the set range. If this
function is activated, this temperature di󰀨erence can be compensated.
Inactive compensation (initial state), the
word "NO" appears on the display.
See the "UNITS" menu for temperature
unit selection (°C or °F).
MEDIUM TEMPERATRE
FAILURE MODE
HART
FACTORY DEFAULT
RESET
Medium Temperature:
YES
+ 20 °C
After start of the zone temperature compensation mode it is necessary to set the temperature of
the surface of the medium. The level meter then calculates the average value from the medium
temperature and the temperature at the installation place of the level meter. With such an average
temperature it counts in calculating of the velocity of acoustic waves propagation and for determi-
nation of the level position.

SonarFox UST 20 AFRISO
20
FAILURE MODE
Determines the current value at the output of the product in the event of an echo loss ("NO
ECHO").
MEDIUM TEMPERATRE
FAILURE MODE
HART
FACTORY DEFAULT
RESET
FAILURE MODE
NO ECHO: 3.75 mA
DEAD ZONE: 22 mA
NO ECHO: Current in case of echo loss
DEAD ZONE: Dead zone current
The values can be set in three steps:
3.75 mA, 22 mA and LAST (last mea-
sured data).
HART
This menu item belongs to the menu of the product with the current output UST-20. HART®-Pro-
tocol setting (point to point, multidrop) and address for the multidrop mode. Up to 15 units can be
connected to one two-wired cable in the multidrop mode.
MEDIUM TEMPERATRE
FAILURE MODE
HART
FACTORY DEFAULT
RESET
HART:
POLLING ADDRESS
00
In case of the address "00", the point to
point mode is enabled. The range from
"01" to "15" is reserved for addresses in
the multidrop mode.
MODBUS
This menu item belongs to the menu of the product with the output Modbus UST 20. Modbus
mode is intended for the settings of the level Modbus addresses, baud rate and parity settings.
MEDIUM TEMPERATRE
FAILURE MODE
HART
FACTORY DEFAULT
RESET
MODBUS: ADDRESS: 1 to 247 (default 1) 4800, 9600,
19200 (default 9600)
FORMAT : 8N1, 8O1, 8E1, 8N2 (default 8N1)
FORMAT: number of Stopbits:
FACTORY DEFAULT
To reset the initial values of the level meter set by the manufacturer, press the OK button (see the
Factory default table).
MEDIUM TEMPERATRE
FAILURE MODE
HART
FACTORY DEFAULT
RESET
FACTORY DEFAULT
ARE YOU SURE?
After you press the OK button, "RUN-
NING" will be displayed for about 3 sec.
After the initial values are set, "DONE"
will be appear on the display.
FACTORY DEFAULT
DONE
PRESS TO EXIT
RUNNING
FACTORY DEFAULT
ADDRESS: 001
BAUD RATE: 9600
FORMAT: 8N1
parity N – non parity
O – odd parity
E – even parity
data: 8 - number of bits