Microlectra Dinel ULM-70 Bedienungsanleitung

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

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.

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

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.

• 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

• 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.

• 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

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

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.

Andere Handbücher für Dinel ULM-70

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