Microlectra Dinel ULM-70 User manual

Read carefully the instructions published in this manual before the rst use of the level meter. Keep the manual
at a safe place. The manufacturer reserves the right to implement changes without prior notice.
INSTRUCTION MANUAL
ultrasonic level meters ulm – 70
Firmware: v.2.0

TABLE OF CONTENTS
1 . Measuring principle........................................................................................................................................... 3
2 . Range of applications........................................................................................................................................ 3
3 . Variants of sensors............................................................................................................................................ 3
4 . Dimensional drawings ...................................................................................................................................... 4
5 . Installation and putting into operation....................................................................................................... 4
6. Installation instructions .................................................................................................................................. 5
7. Electrical connection ......................................................................................................................................... 9
8. Examples of ULM-70 connection..................................................................................................................... 10
 8.1 . Wiring diagram of the level meter with current output and PDU unit ................................................ 10
 8.2 . WiringdiagramofthelevelmeterwithcurrentoutputandPDUunit .............................................
in versions for explosive areas ................................................................................................................... 11
 8 .3 . WiringdiagramofthelevelmeterwithcurrentoutputandMGUunit............................................... 13
 8 .4 . WiringdiagramofthelevelmeterwithModbus/RS485andMGUunit............................................ 13
 8 .5 . WiringdiagramofthelevelmeterwithModbus/RS485andPDUunit ............................................. 13
9 . Set-up elements ................................................................................................................................................. 14
10. Status signalization ......................................................................................................................................... 14
11 . Operation and setting .................................................................................................................................... 15
 10.1 . Basicconguration................................................................................................................................... 15
 10.2 . Servicesettings ......................................................................................................................................... 18
 10 .3 . Additionalfunctions................................................................................................................................. 20
12. HART® communication protocol ................................................................................................................... 22
13. Modbus® communication protocol .............................................................................................................. 23
14 . Order code......................................................................................................................................................... 23
15 . Accessories ........................................................................................................................................................ 23
16 . Safety, protection, compatibility and explosion proof........................................................................... 24
17 . Use, manipulation and maintenance ......................................................................................................... 24
18 . Marking of labels ............................................................................................................................................. 25
19 . Menu structure ................................................................................................................................................ 27
20 . Specications.................................................................................................................................................... 28
21 . Packing, shipping and storage...................................................................................................................... 30

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© Dinel,s.r.o.ULM–70
1 . MEASURING PRINCIPLE
UltrasoniclevelmeterULM®is a compact measuring device consisting of two parts - main level
meter(thebodywithmeasuringelectronics)anddisplaymodule.Usingtheelectroacoustic
converter, the level meters transmit the sequence of ultrasonic pulses that spread towards the
surfacelevel.Theconverterrecuperatesreectedacousticwavesthataresubsequentlypro-
cessedintheelectronicmodule.Theintelligentevaluationblockltersoutinterferingsignals,
comparesthecleanedreceivedsignalwiththefalsereectionmap(e.g.frommixers,ladders,
reinforcementetc.)andselectsasuitablereection(echo).Basedontheperiodduringwhich
theindividualpulsesspreadtowardsthesurfacelevelandbackandbasedonthemeasured
temperatureinthetank,theinstantdistancetothesurfaceleveliscalculated.Accordingtothe
levelheight,thelevelmeteroutputissetandthemeasuredvalueisdisplayedonthedisplay.
2 . RANGE OF APPLICATIONS
For continuous non-contact level measurement of liquids (water solutions, sewerage water,
etc.),mashandpastematerials(sediments,sticks,resinsetc.)inclosedoropenvessels,sumps,
reservoirsandopenchannels.Incasethelevelofbulk-solidmaterialsismeasured,themeas-
urementrangeisreduced.Thelevelmeterscancontinuouslymeasurelevelsofbulk-solidma-
terialswithalowconcentrationofdustparticles.Consultthemanufactureronrecommended
useofthelevelmeterforbulk-solidmaterials.
3 . VARIANTS OF SENSORS
Alloperationsdescribedinthisinstructionmanualhavetobecarriedoutonlyby
trainedpersonneloranaccreditedperson.Warrantyandpostwarrantyservicemust
beexclusivelycarriedoutbythemanufacturer.
Improper use, installation or set-up of the level meter can result in crashes in the ap-
plication(overllingofthetankordamageofsystemcomponents).
Themanufacturerisnotresponsibleforimproperuse,lossesofworkcausedbyeither
direct or indirect damage, and for expenses incurred during installation or use of the
level meter.
SAFETY
ULM –70_ –02 Measuring range from 0.15m to 2m, plastic PVDF transmitter,
mechanicalconnectionwiththreadG1".
ULM –70_–06 Measuring range from 0.25m to 6m, plastic PVDF transmitter,
mechanicalconnectionwiththreadG1½".
ULM –70_–10 Measuring range from 0.4m to 10m, plastic PVDF transmitter,
mechanical connection with thread G2¼".
ULM–70_–20 Measuring range from 0.5m to 20m, plastic PVDF transmitter,
mechanicalconnectionwithaluminiumalloyange.

ULM–70© Dinel, s.r.o.
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4 . DIMENSIONAL DRAWINGS
ULM–70_–02
Pg11 cablegland
Groundterminal
variant ULM-70
with protective conductor
ULM–70_–06
ULM–70_–20
ULM–70_–10
This procedure includes the following three steps.
• INSTALLATION
• ELECTRIC CONNECTION
• SETTING
5 . INSTALLATION AND PUTTING INTO OPERATION

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© Dinel,s.r.o.ULM–70
Fig. 2: Level meter dead zone
m–Deadzone
(blindzone,blocking
distance)
6 . INSTALLATION INSTRUCTIONS
• Install the level meter in the vertical positionintotheupperlidofthetankorreservoirusing
aweldingange,afasteningnutoraangesothatthelevelmeteraxiscanbeperpendicular
tothesurfacelevelofthemeasuredliquid(Fig.1).
• The min. dimensional parameters to install the
levelmeterintoalidoraceilingofatankaregiven
in Fig. 3.
• When installing in an open channel (reservoir,
drainetc.),installthelevelmeterontoabracketas
closeaspossibletotheexpectedmax.level.
• The reference plane for the measurement is the
lower edge of the transducer (Fig.2). In connec-
tion with the measurement principle, no signals
reectedintheareaimmediatelyunderthelevel
meter can be evaluated. The zone(Fig.2)deter-
mines the min. distance possible between the
level meter and the highest surface level. The min.
distances to the medium are given in the chapter
"Specications".
• Itisnecessarytoinstallthelevelmetersothatthe
binlevelcannotinterferewiththedeadzonewhen
lleduptothemaximum.Ifthemeasuredlevelin-
terfereswiththedeadzone,thelevelmeterwillnot
workproperly.
Fig. 1: Recommended installation in
the tank
Fig. 3: Installation distance from the tank wall
• Ifthemaximumsurfacelevelinthetankinterfereswiththedeadzone,thelevelmeterhas
tobemountedintoahigherinstallation neck.Inthisway,thetankcanbellednearlyup
tothemaximumvolume.Theinnernecksurfacehastobeevenandsmooth(withoutedg-
esandweldedjoints);theinneredgeshouldberoundedwheretheultrasonicwaveleaves
thepipe.Theneckdiametershouldbeaslargeaspossiblebuttheneckheightshouldbe
aslowaspossible.RecommendeddimensionsoftheinputneckaregiveninFig.4.
ULM–70–
02 ; 10
d > 1/12 c
(min. 200 mm)
ULM–70–06 d > 1/8 c
(min. 200 mm)
ULM–70–20 d > 1/10 c
(min. 200 mm)
Fig. 4: Possible installation of the installation neck
a–Neckheight
b– Neckwidth
m – Deadzone(blindzone,
blockingdist.)
ULM–70–
02 ; 06
a < 3 b
b > 100 mm
ULM–70–10 a < 1,5 b
b > 100 mm
ULM–70–20 a < 1,5 b
b > 150 mm
d–Distancefrom
thetankwall
c–Maximumreach
of the level meter
reference plane for
the measurement

ULM–70© Dinel, s.r.o.
7
• Iftheemittedacousticsignalofthelevelmeterisaectedbynearobjects(roughnesson
wallsofthetank,variouspartitions,mixers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 (direct the mixer paddle to the ultrasonic signal
beam)(Fig.5and6).
• Donotinstallthelevelmeterinorabovethellingpoint(Fig.7).
Fig. 5: False echo from obstacles in the tank Fig. 6: False echo from the mixer paddle
Fig. 7: Level meter installation outside the inuence of lling
• 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 max-
imum range of measuring the medium. It is
also appropriate to use a directional horn
(see image 8), which reduces the shorten-
ingofthemeasuringrange,becauseitbet-
terconcentratesacousticenergywhilepre-
servingthesamebeamangle,andimproves
thesensitivity when receiving thereected
echo. We recommend to consult the use with
the manufacturer.
Fig. 8: Level meter installation in silo or hopper
horn
adapter

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© Dinel,s.r.o.ULM–70
• Scattering or attenuation of
the ultrasonic signal can result
if the surface level has been
moderately stirred or rippled
(by a mixer, coming liquid etc.).
It can result in reduction of the
measurement range or unreli-
ablefunctionofthelevelmeter
(Fig.10).
• Rotatingmixer blades can cause
that the surface is stirred, which
resultsinfalsereectionsofthe
ultrasonic signal from the surface
levelandunreliableoperationof
thelevelmeter(Fig.13).(obr.11).
For a rippled or swirling level,
you can use the directional
horn to eliminate scattering of
the ultrasonic signal.
• During lling, mixing and other processes, foam
can arise on the surface level of the measured liquid.
The foam considerably absorbs the ultrasonic sig-
nal which might cause malfunction of the level meter
(Fig.9).Forsuchcases,itisnecessarytosetup"SENSITIV-
ITY"modeto"high"orcontactthemanufacturerifneed.
Incaseofathinlayeroffoam,itisalsopossibletouse
thedirectionalhornforimprovingreceiptofthereec-
ted echo.
Fig. 9: Foam on the surface
Fig. 10: Moderately stirred
surface
Fig. 11: Intensely stirred surface
• If the level sensor is mounted to
bottlenecks and places with ba-
rriers, or near uneven walls or the
llingarea,wherethetransmissi-
onsignalcouldbedistorted, we
recommend using a guide tube
(acoustic horn). The tube must
be made from a single material
with a smooth inner surface (see
image 12a, 12b ). The minimum
tubediametermusthavethedi-
mension "b" according to image
4onpage5.Afterinstalling,you
must perform the procedure
"LEARNING".  We recommend
consulting with the manufacture
on the construction of the guide
tube.
Fig. 12a: Short guide tube installation
ventilation
holes
sleeves for
mounting
Fig. 12b: Total guide tube
installation

ULM–70© Dinel, s.r.o.
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• Thelevelmetermustnotbeinstalledinplaceswithdirect
solar radiationandmustbeprotectedagainstweather
eects.
• If the installation in places with direct solar radiation is in-
evitable,itisnecessarytomountashielding coverabove
thelevelmeter(Fig.13).
• It is suitable to run the cable under a cable bushing
(obliquelydowninslack)accordingtoFig.14toprevent
penetration of humidity. Then the rain and condensing
watercanowofreely.
• Thecablebushingandconnectorhavetobesuciently
tightenedtopreventpenetrationofhumidity.
• To lower the minimum distance to the measured medium,
a reection board made from solid, even and smooth
materialcanbeinstalledtothelevelmeter.Thenthetank
canbellednearlyuptothemaximumheight.Thesolu-
tionissuitableforopentanksandreservoirs(Fig.15).
H+L=mrtvázóna
Fig. 13: Solar radiation
shielding cover
Fig. 14: Prevention to avoid
intrusion of humidity
Fig. 15: Reection board

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© Dinel,s.r.o.ULM–70
7 . ELECTRICAL CONNECTION
Thelevelmeterisconnectedtoconsequential(evaluating)devicewithasuitablecablewith
theouterdiameterof6to8mmusingscrewterminalslocatedunderthedisplaymodule.The
recommended cross section of cores for the current version 2 x 0,5 ÷ 0,75 mm2and for the ver-
sionwithModbuscommunication2x2x0,25mm2
(twistedpair,shielded).Pluspole(+U)isconnected
to the terminal (+),minuspole(0 V)totheterminal
(-)andtheshielding(onlyforshieldedcables)tothe
terminal ( ).CommunicationwiresAandBofthe
lineRS-485(forversion"M"-Modbus)areconnected
totheterminalsAandB.
Procedure to connect the cable to the level meter:
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.
3. 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.
4. Releasethecableoutletandthreadthestripped
supplycablein.
5. Connect the cable to the screw terminals ac-
cordingto thediagramin Fig.17or 18.Firmly
tightentheterminalsandthecableoutlet.
6. IfthelevelmeterwithModbusisinvolvedasa
terminal for RS-485, we recommend (to avoid
reectionsontheline)to connect120Ωtermi-
nationresistor.Thisisdonebymovingasmall
leveroftheswitchmarked120ΩtotheONposi-
tion.Onthelevelmetersconnectedtotheline
RS-485asanintermediatedevice,thetermina-
tion resistors are not connected (switch remains
o).
7. Insertthedisplaymodulebackintotheheadso
thattheconnectorisproperlyconnected.
8. Slidesiliconesealonthethreadofthelevelme-
terbody,thentightenthenutoftheupperlid.
Connectthecabletoconsequentialdevice.
displayunitconnector
Terminalblock
metal
clip
Fig. 17: Inside view of screw terminals of the level
meter with current output ULM-70_-_-_-I
Fig. 16: Wiring diagram of the level meter
with current output ULM-70 _-_-_- I
+ABIS
GND
ON
120
displayunitconnector
Terminalblock
metal clip
120Ωswitch
Fig. 18: Wiring diagram of the level meter
with Modbus ULM-70_-_-_-M
Fig. 19: Inside view of screw terminals of the level meter
with Modbus ULM-70_-_-_-M
Electricalconnectionmustbedoneinde-energizedstate!
Withregardtopossibleoccurrenceofelectrostaticchargeonnon-conductiveparts
of the level meter, all level meters for explosive spaces (ULM–70Xi type) must be
grounded.Itwillbedoneusingascrewplacedontheheadofthelevelmeterunder
thecableoutlet.