Veto GUT741 User manual

Instruction Manual
GUT741 Ultrasonic level sensor

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Contents
I. General Information............................................2
II. Characteristics....................................................2
III. Specifications and ambient condition...............3
IV.Menu, code and its meaning...............................3
V. installation and attention.....................................4
VI. Wiring diagrams................................................7
VII. Trouble shooting..............................................9
Manufacturer Certificate.......................................12
Warranty card........................................................13

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I. General information
Ultrasonic level sensor is special designed for small spaces. It
is small volume, light weight and provides perfect measuring
function （such as transmitting ,receiving ,auto temperature
compensation, digital filter…）. Supporting RS485 serial menu
adjustment, it bring convenient of displaying. According to onsite
condition, it can divide into small blind high prices sensor and
standard sensor.
II. Characteristics
●Optional increment/difference distance measurement to measure
distance or level
●Direct display of weight inside container after setting specific gravity
parameters
●4～20mA output, RS485S serial data output or 0～5V analog output
●through PC software to set menu and adjustment
●Free adjustment the range of current or voltage output
●PC serial output and adapters, capable of PC networking
●Optional increment/difference measurement to measure distance or
level
●1-15 transmitted pulse intensity depending on working conditions
●free setting of full-scale start point and end point

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III. Specifications and ambient condition
Sense range ：1m、5m or 12m
Unusable area：<0.06、<0.4、<0.6m
output：4～20mA or RS485
frequency：20～350KHz（difference type）
Max load impedance：>300Ω
Error（standard condition）：±0.3％×max range
Work temperature：－10～65℃
Wore pressure：normal
dimension：Φ74mm×119mm×M60
installation：M60X2 or 61mm diameter hole
work voltage ：DC12～24V
power consumption：<1W
IV Menu, code and its meaning
Menu and Function
One level
Two stage menu
Three level
Four level
Mounting
Work Mode
Range Mode
Water Level
Mode
Input Mounting
Height
Input Level
Value
Output
Analog
F0
FS
Serial
Address

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Baud Rate
9600(default)
Check
NONE(default)
Switch
No.1 D
No.1 H
No.2 D
No.2 H
No.3 D
No.3 H
Display
Display Unit
m(default)
Reserved
Decimal
Number
3(default)
Contrast
Display Delay
means:close
display
15minute(default)
Probe
Filtering
Fast(default)
V. installation and attention
Correct
Wrong
Vertical to liquid level

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Correct
Using a waveguide to avoid mixer
Wrong
Correct
Wrong
Vertical to surface and avoid feed inlet

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Difference between Difference mode and increment mode
(Note: This product is no debug button)
a、under difference mode ，
set bAd=B (m),B ，A is the
distance between sensor
surface and liquid level. Dis
the height of liquid，D= B -
A，at this moment, display
value is the distance from
button of container to sensor
surface and equals to liquid
height （D）.
chatrt 4
b、Under increment mode, set bAd=0，display value is distance
from sensor surface to liquid surface（A）.
1. This instrument is easy to install, only a properly positioned hole
ofΦ50mm is needed in the working surface. Insert the front end of the
instrument and install the damping washer, and tighten the nylon ring. For a
long, stable and efficient operation, it is preferred to use a 12-24V
regulated power supply.DC must touch ground.
2. Refer to the tags attached on the instrument for wiring. In order to
keep it working reliable and display precise , please electrify ＞15
minutes before work. After commissioning, “B” must be pressed to turn
off the display to minimize power consumption (Press “B” again to turn on
the display), and tighten the back cover to prevent water or dust from
entering. When operated outdoors, it should be placed under a sun screen to

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avoid direct under sunshine and rain. Lightning proof measures should also
be taken outdoor.
3. Adjust the end of sensor repeatedly to vertical to the surface of
measured level. The distance between the probe and surface depends on the
maximum displacement of the surface to be measured, blind zone of the
instrument and range of probe.
4. If the liquid to be measured is sewage or containing afloat impurities,
a wire-fence should be placed under the probe to keep them out of the
normal measurement range of the probe. Otherwise correct and stable display
can not be obtained.
5. If the liquid level to be measured fluctuates, keep the measurement
range far away from the fluctuation as much as possible, or use a
waveguide to minimize the fluctuation of liquid level.
6. The transmitted pulse intensity should be set properly; otherwise it
will not work normally.
VI. Wiring diagrams
1. Wiring diagram of current (voltage) output connecting with
secondary instrument
Supply +
Output
Supply _
DC12V／100mA voltage output
Input
GND
Instrument secondary instrument

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2. Wiring diagram of serial output connection with PC
3.Wiring definitions
Definition lead
pin/color
applied
Supply +
Red
■Yes／□No
Supply -
Black
■Yes／□No
Current output
White
■Yes／□No
Voltage output
□Yes／□No
Serial output
□Yes／□No
Supply +
Output A
output B
Supply -
Standard
Serial port
External power instrument 485－232 PC
A
B
DC regulated voltage

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VII. Trouble shooting
No.
problem
probable reason
remedy
1
Not working
when power
on, no display,
no sound of
sensor
①power is not
connected or
“+””-”polarities are
connected reversely;
②too low voltage
resulting no working
or too high resulting
damage
①check to
ensure correct
wiring as
instructed.
②use 12-24V
DC supply,
contact with
distributor
2
can’t serial
communication
①no power, serial
A、B reverse
connection
②different serial
setting with host and
slave instrument
damaged
①check line
②check host
and slave
instruments’
setting
③contact with
distributor
3
no change with
distance or
irregular
fluctuation of
values
①too deflective
installation
②improper setting of
pulse intensity,
leading to great
residual vibration or
diffraction ③more
than 2 instruments on
①adjust the
axis of sensor
vertical to
surface to be
measured ②in
general with
range of 1-3m,
transmit

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stream, interfering
each other ④too
much
electromagnetic
disturbance in
working area
intensity is 2-5.
③Try to
eliminate
interference;
④find out
disturbance
source and
shield from it.
4
With sound of
sensor, “Lon”
or” out”
displayed
①exceeding
measure range ②too
close between
surface and sensor.③
improperly used for
high dust, foam or
steam content fields,
or too high or too
low working
temperature;
improper setting of
pulse intensity
①adjust actual
range with
permitted ②
adjust working
conditions as
required ③
change
transmitting
intensity until
stable display
5
With sound of
sensor, display
deviations
exceeding
10cm
①non vertical
installation, leading
to multiple reflection
②installed too close
to wall, sonic
wave reflected
midway ③check for
①adjust
installation
positions
repeat. ②
correctly set E
value ③for
large

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correct setting of E
④check for correct
display of
temperature
temperature
difference,
adjust “CB” to
proper value.
6
Abnormal
4-20mA
output; too
high or low,
fluctuating
①too large load
resistance
②measurement
range FS changed,
output tuning AL or
AH changed
③undesired supply
rectification and
filtering④electrify
time not enough
①lower load
resistance
②readjust FS,
AL or AH③
replace with
DC regulated
supply with
larger
capacity④
electrify ＞15
minutes before
work

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Manufacturer Certificate
Main specifications
measurement range：FS= 6 m
unusable zone：□mm；■500mm；□other
accuracy：□±0.1% X FS ■0.3％； □other
signal output：□0-20mA；□4-20mA；□0-5V；□1-5V；
□RS485；□other
working temperature：■normal；□-20-80℃；□other
working pressure：■normal；□other
working humidity：≤95%RH
storage temperature：0—45℃
storage humidity：≤70%RH
working voltage：□12VDC；□24VDC
normal power consumption：＜1.5W

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Warranty card
Purchaser
Telephone
Address
Post code
Product
Type
Item No.
Delivery
date
Repair
record
Notes
1. According to THREE GUARANTEES, When there
are problems with the product under correct operation,
it can be refunded, changed and repaired free of charge
within one week, three months and one year
respectively from the day it was bought.
2. For the problems caused by improper use, only the cost
of material will be charged.
3. The product can not be dismantled or unsealed without
manufacturer’s agreement; otherwise the repair
service is not available.
4. The freight out and home in relation to repair will be
paid by customer.