Burkert 8718 User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation

LFC, Liquid Flow Controller

LFM, Liquid Flow Meter
Type 8719
Type 8709
Type 8718
Type 8708

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous resérve de modification techniques.
© 2009 Bürkert Werke GmbH & Co. KG
Operating Instructions 0910/01_EU-ML_00805765

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Co n t e n t s
 
 
 
 
 
 
 
 
 
 
 
 
 
5.1.1. LFC,LiquidFlowController..................................................................................................................11
5.1.2. LFM,LiquidFlowMeter.........................................................................................................................11
 
5.2.1. FunctionoftheLFC,LiquidFlowController.....................................................................................11
5.2.2. FunctionoftheLFM,LiquidFlowMeter............................................................................................12
5.2.3. Functionofthesensor............................................................................................................................12
5.2.4. Controlelectronics..................................................................................................................................13
 
 
 
6.1.1. Inscriptionontheratingplate/calibrationplate..............................................................................16
 


english


4
 
 
 
 
 
 
 
 
 
 
 
7.5.1. Settingthebusaddressondeviceswithoutrotaryswitchforsettingtheaddress.................30
7.5.2. Settingthebusaddressondeviceswithrotaryswitchforsettingtheaddress
(Types8718/8708)..............................................................................................................................30
7.5.3. Pinassignment.........................................................................................................................................31
 
 
 
8.2.1. LEDs...........................................................................................................................................................35
8.2.2. Inputs/Outputs.........................................................................................................................................35
 
8.3.1. Standardcontrolmode..........................................................................................................................39
8.3.2. Autotunefunction....................................................................................................................................39
8.3.3. Safetyfunction.........................................................................................................................................40
8.3.4. Set-pointvalueprofile............................................................................................................................40
8.3.5. Controlmode...........................................................................................................................................40
 
 
 
9.2.1. Maintenancewhenoperatingwithhighlysoiledfluids...................................................................42
9.2.2. Cleaningandrecalibrationatthefactory...........................................................................................43
 
english


5
 
 
10.1.1.Electricalaccessories.............................................................................................................................45
10.1.2.Fluidaccessories.....................................................................................................................................46
10.1.3.MassFlowCommunicator(PCsoftware).........................................................................................46
10.1.4.Documentation.........................................................................................................................................47
 
 
 
 
 

 
 
 
english


6
Operating Instructions

Theoperatinginstructionsdescribetheentirelifecycleofthedevice.Keeptheseinstructionsinalocationwhichis
easilyaccessibletoeveryuserandmaketheseinstructionsavailabletoeverynewownerofthedevice.


Failuretoobservetheseinstructionsmayresultinhazardoussituations.
Theoperatinginstructionsmustbereadandunderstood.•



Failuretoobservethewarningresultinafatalorseriousinjury.•


Failuretoobservethewarningmayresultinseriousinjuriesordeath.•


Failuretoobservethiswarningmayresultinamediumorminorinjury.•


Failuretoobservethewarningmayresultindamagetothedeviceortheequipment.•
indicatesimportantadditionalinformation,tipsandrecommendations.
referstoinformationintheseoperatinginstructionsorinotherdocumentation.
designatesaprocedurewhichyoumustcarryout.
→
english


7
Authorized use



TheLFCTypes8718and8719aredesignedforcontrollingtheflow-rateofcleanandlow-viscosityliquids.•
TheLFMTypes8708and8709areusedexclusivelyformeasuringtheflow-rateofcleanandlow-viscosityliquids.•
Onlythefluidsstatedontheratingplateandonthecalibrationprotocolmaybeusedforoperation.•
Ifusedoutdoors,thedevicemustbeprotectedfromtheelements.Protectagainsthumidityanddirect•
sunlightandobservethepermittedambienttemperature.
Duringuseobservetheauthorizeddataandoperatingconditionsspecifiedinthecontractdocumentsand•
operatinginstructions,aswellastherangeofapplicationsdescribedinChapter5.1. .
Correcttransportation,storageandinstallation,andcarefuluseandmaintenance,areessentialforreliable•
andfaultlessoperation.
Usethedeviceonlyasintended.•

Ifexportingthesystem/device,observeanyexistingrestrictions.

TheLFC/LFMTypes8718,8719/8708,8709mustnotbeusedforcontrolling/measuringtheflow-rateof•
fluidscontainingparticles(particlesize>20µm).
Donotoperatethedevicewithoutthestainlesssteelmeshfilterdiscinstalledatthefactory.•
Donotfeedanyotherfluidsintothesystemotherthanthedesignatedoperatingfluidindicatedonthedevice•
typeplate.
Exception:Agentforcleaninganddecontaminatingthedevice(seealsoChapter9.2.1. ).
Indoingso,observetheresistanceofthematerialsusedinthedevice.TheChemicalResistanceChartcanbe
foundontheInternetat:
www.burkert.com Documentation Brochures&Catalogues
Ifindoubt,contactthemanufacturer.
Donotoperatethedeviceinanmountingpositionwhichdeviatesfromthecalibrationconditions.•
Donotputanyloadsonthehousing(e.g.byplacingobjectsonitorstandingonit).•
Donotmakeanymodificationstothedevicehousings.Donotpaintthehousingpartsorscrews.•
english
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8
Basic Safety Instructions

Thesesafetyinstructionsdonotmakeallowanceforany
contingenciesandeventswhichmayariseduringtheinstallation,operationandmaintenanceofthedevices.•
localsafetyregulations–theoperatorisresponsibleforobservingtheseregulations,alsowithreferencetothe•
installationpersonnel.

Beforelooseningthelinesandvalves,turnoffthepressureandventthelines.•

Beforeremovingcovers,• switchoffthepowersupplyandsecuretopreventreactivation!
Observeapplicableaccidentpreventionandsafetyregulationsforelectricalequipment!•

Ifcontactismadewiththeoperatingfluidanditsreactionproducts,includinginvaporform(touching,inhaling),•
thereisanacuteriskofinjury.
Observeapplicableaccidentpreventionandsafetyregulationsfortheoperatingfluidsused.•

Topreventinjury,ensurethat:
Thesystemcannotbeactivatedunintentionally.•
Installationandrepairworkmaybecarriedoutbyauthorizedtechniciansonlyandwiththeappropriatetools.•
Afteraninterruptioninthepowersupplyorfluidsupply,ensurethattheprocessisrestartedinadefinedor•
controlledmanner.
Thedevicemaybeoperatedonlywheninperfectconditionandinconsiderationoftheoperatinginstructions.•
Thegeneralrulesoftechnologyapplytoapplicationplanningandoperationofthedevice.•


Thedevicecontainselectroniccomponentswhichreactsensitivelytoelectrostaticdischarge(ESD).Contact
withelectrostaticallychargedpersonsorobjectsishazardoustothesecomponents.Intheworstcasescenario,
theywillbedestroyedimmediatelyorwillfailafterstart-up.
ObservetherequirementsinaccordancewithEN61340-5-1and5-2tominimizeoravoidthepossibilityof•
damagecausedbysuddenelectrostaticdischarge!
Alsoensurethatyoudonottouchelectroniccomponentswhenthepowersupplyvoltageispresent!•
TheLFC/LFMTypes8718,8719/8708,8709weredevelopedwithdueconsiderationgiventotheaccepted
safetyrulesandarestate-of-the-art.Nevertheless,dangeroussituationsmayoccur.
Failuretoobservethisoperatingmanualanditsoperatinginstructionsaswellasunauthorizedtampering
withthe device, releaseus from anyliability and alsoinvalidate thewarranty covering thedevices and
accessories!
english


9
General Information


Checkimmediatelyuponreceiptofthedelivery,thatthecontentsarenotdamagedandthatthetypeandscope
agreewiththedeliverynoteandpackinglist.
Ifthereareanydiscrepancies,pleasecontactusimmediately.

Contactaddress:
BürkertFluidControlSystems
SalesCenter
Chr.-Bürkert-Str.13-17
D-74653Ingelfingen
Tel.+49(0)7940-1091111
Fax+49(0)7940-1091448
E-mail:[email protected]

Contactaddressescanbefoundonthefinalpagesoftheprintedoperatinginstructions.
Andalsoontheinternetat:
www.burkert.com Bürkert Company Locations

Thisdocumentcontainsnopromiseofguarantee.Pleaserefertoourgeneraltermsofsalesanddelivery.Thewar-
rantyisonlyvalidiftheLFC/LFMTypes8718,8719/8708,8709areusedasintendedinaccordancewiththe
specifiedapplicationconditions.
ThewarrantyextendsonlytodefectsintheLFC/LFMTypes8718,8719/8708,8709anditscomponents.
Weacceptnoliabilityforanykindofcollateraldamagewhichcouldoccurduetofailureormalfunctionof
thedevice.

Thebrandslistedbelowaretrademarksofthecorrespondingcompanies/associations/organisations
PROFIBUS  PROFIBUSNutzerorganisatione.V.
DeviceNet  ODVAOpenDeviceNetVendorAssociation
CANopen  CiACANinAutomation
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10
General Information

OperatinginstructionsanddatasheetsforTypes8718,8719,8708und8709canbefoundontheInternetat:
www.burkert.comDocumentation Type
ThecompletedocumentationisalsoavailableonCDwhichcanbeorderedbyquotingpartno.804625.
english
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11
System Description

 
TheLFC/LFMTypes8718,8719/8708,8709aredevicesforcontrollingormeasuringtheflow-rateofliquids
inprocesstechnology.
Thedevicesarespecifiedforthecontrolandmeasurementoflowflow-rates.

Theactualflow-ratevaluesuppliedbytheintegratedsensoriscomparedinthedigitalcontrolelectronicswiththe
set-pointflow-ratevaluespecified,viaastandardsignalorfieldbus.Theactualflow-ratevalueisalsoavailableas
anoutput,viaastandardsignalorfieldbus.
Ifthereisacontroldeviation,theactuatingvariableoutputtotheproportionalvalveismodifiedviaacontrol
algorithm.Asaresult,theactualflow-rateisadjustedtotheset-pointvalueandtheflow-ratecanbeheldona
fixedvalueorfollowapredefinedprofilesequence,irrespectiveofpressurechangesorotherdisturbancesinthe
system.
Alow-frictionproportionalvalvewithahighresponsesensitivityisusedasanactuatingelement.

Theactualflow-ratevaluesuppliedbytheintegratedsensorisavailableasanoutput,viaastandardsignalorfield
bus.


TheLFCTypes8718and8719arecompactdevicesforcontrollingtheflow-rateofliquids.
Theycorrectastipulatedset-pointflow-ratevalueindependentlyofdisturbancevariables,suchaspressurefluc-
tuationsorfluctuatingflowresistance,e.g.duetofiltersoiling.
TheLiquidFlowControllerconsistsofthefollowingcomponents:
Flowsensor(Qsensor),•
Controlelectronics(withsignalprocessing,controlandvalveactuationfunctions),•
Proportionalsolenoidvalveasanactuatingelement.•
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12
System Description






Control
electronics
Qsensor Actuatingelement
(proportionalvalve)
Components of the Liquid Flow ControllerFig. 1:

Theset-pointdefaultvalue(w)isimplementedelectricallyviaastandardsignalorafieldbus.
Theactualvalue(x)measuredbythesensoriscomparedwiththeset-pointvalueinthecontroller.
Thecontrollersuppliestheactuatingelementwithapulse-widthmodulatedvoltagesignalasanactuating
variable.Thepulse-dutyfactorofthevoltagesignalisvariedaccordingtotheestablishedcontroldeviation.
Theactualvalueisalsosuppliedexternallyasxoutviaananalogueelectricalinterfaceorafieldbusandisavailable
totheuserformonitoringpurposesorotherevaluations(e.g.consumptiondeterminationbyintegration).

TheLFMTypes8708and8709lacktheproportionalvalvecomponent,comparedtothecorrespondingLFC
Types8718and8719.
Thedevicescanthereforeonlymeasuretheflow-rateandnotcorrectitindependently.
Thepropertiesoftheothercomponents,inparticularthesensordescribedbelow,areidenticaltothoseofthe
LFCTypes.

Theflow-rateismeasuredaccordingtothedifferentialpressuremethod.
Ameasuringorificeinthemainductgeneratesapressuredropinaflow-ratefromp1top2;thispressuredropis
measuredbythedifferentialpressuresensor(seeFig. 2: Flow-rate measurement; Differential pressure method).
Thedifferentialpressuresensor,constructedfromtwoindividualpressuremeasuringcells,suppliesapreciseand
temperature-compensatedmeasuringsignalwhichisusedtocalculatetheflow-rate.
Irrespectiveofthecontrolstatus,theflow-ratevaluemeasuredbythesensorissentviaastandardanaloguesignal
outputordigitallyviathefieldbus.
Tomaintainadynamicorquietactualvalueoutputsignal,thedampingoftheoutputsignalcanbe
changedwiththe"MassFlowCommunicator"software(seechapter10.1.3. Mass Flow Communicator
(PC software)).
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13
System Description

Fig. 2: Flow-rate measurement; Differential pressure method

Thismeasuringmethodhasveryshortresponsetimesandthereforealsoallowsveryshortsamplingratesby•
thecontrolelectronics.
Themeasurementoccursstatically,nomovingpartsarerequiredinthefluid.•

Microprocessorelectronicsprocessthecurrentset-pointandactualflow-ratesandcontroltheactuatingelement.
Thesensorsignalisprocessedbythecontrolelectronicsandisconvertedbythecalibrationcurvestoredinthe
deviceintoavaluecorrespondingtotheactualflow-rate.
Tocontrolcriticalprocesses,wherequickflow-ratechangesarenotpermitted,arampfunctioncanbeactivated
viathe "Mass FlowCommunicator"software (see Chapter10.1.3. Mass Flow Communicator (PC software)).
Indoingso,theparametersforanascendingandadescendingset-pointvaluecanbesetseparately.
Moredetailedinformationontherampfunctionandonallotherfunctionscanbefoundinthesoftware
documentationfortheLFC/LFM.

Controldeviation = Set-pointvalue – Actualvalue
   
ThecontroldeviationisprocessedaccordingtoaPIcontrolalgorithm.
Thecontrolparametersaresetatthefactory.
Totakeaccountofthepropertiesofthecontrolpath,thecontrolleroperateswithpath-dependentamplification
factors.Whentheautotunefunctionruns,thesearedeterminedautomatically.
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14
System Description

Thedevicehasastoredparameterwhichcanchangethecontroldynamicswiththeaidofthe"MassFlowCommuni-
cator"software(seeChapter10.1.3. Mass Flow Communicator (PC software)).Itsextremeeffectsare
averyquickadjustmentinwhichovershootsareaccepted,1.
asloweradjustmenttotherequiredflow-rate.2.
Theformermayresultinthecontrollerrespondingimmediatelytoverylowcontroldeviations,causingthecontrol
tobeveryturbulent.
Iftheprocessislessdynamic,thebehaviourofthecontrollermaybedampedsothatminorfluctuationsofthe
actualvalueorset-pointvalueareadjustedslowly.

Theactuatingvariableisavailableasapulse-widthmodulated(PWM)signaltotheproportionalvalve.Thefrequency
ofthissignalisadjusteddependingonthevalveused.
Thepulse-dutyfactorofthePWMsignalisusedasanactuatingvariable.
Thepulse-dutyfactoristhequotientoftheswitch-ontimeandthecycleduration.
Thegreatertheswitch-ontime,i.e.thelongerthevalvecoilisactuated,thegreatertheaveragecoilcurrent.The
coilcurrentisthecauseoftheresultingmagneticfieldinthecoil.
Agreatercoilcurrentresultsinagreatermagneticfield,whichincreasesthevalve'smagneticforce,whichfinally
movesthevalvearmature(alsoknownasvalvecore)upagainstaspringforce.

Anoverallbriefcorrectiontimeisachievedbytheproportionalvalverespondingrapidlyasanactuatingelement
andbythebriefresponsetimeofthemeasuringelement(seeChapter6.6. Fluidic Data).

Toensurethesealingfunctionofthevalve,azeropointshut-offisintegrated.Thisisactivatedifthefollowing
conditionsoccuratthesametime:
Set-pointvalue<10%ofnominalflow-rateQnom and Actualvalue<10%ofnominalflow-rateQnom
Ifzeropointshut-offisactive,thePWMsignalissetto0%sothatthevalveiscompletelyclosed.
Thevalveisadirect-acting,normallyclosedvalve.
Areturnspringpressesthevalvearmatureontothevalveseatandsealsit,providedthecoilisnotactuated,i.e.it
cannotgenerateamagneticforcecounteractingtheresetforce.
Asoftseatsealintegratedinthevalvearmatureensuresthatthevalvereliablyshutsoffthefluidflow.

Theset-pointvalueisspecified,accordingtothedevicemodel,eitherasananaloguesignalviathestandard
signalinputordigitallyviatheserialinterfaceorthefieldbusinterface.
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15
System Description

TheLFCusesdirectacting,lifting-armature,proportionalvalvesasactuatingelements,takenfromtheBürkert
rangeofvalves.
Thelow-frictionguideofthevalvearmatureensures(inconjunctionwiththePWMcontrol)acontinuous,mainly
linearcharacteristic,aswellashighresponsesensitivity.Bothareimportantfortheoptimumfunctionalityofthe
LFCclosedcontrolcircuit.
Theorificesofthevalvesarebasedontherequirednominalflow-rateQnom,thepressureconditionsintheappli-
cationandthedensityoftheoperatingfluid.
Aproportionalvalveisselectedbythemanufactureronthebasisofthisdata,sothattheflow-ratecoefficientkVof
theLFC(accordingtotheflow-rateequationsatthespecifiedpressureconditions)allowsamaximumflow-rateof
atleasttherequirednominalflow-rateQnom.
Ifthedeviceisoperatedwithinthespecifiedpressurerange,theproportionalvalvesimultaneouslytakes
overthesealingfunctiontogetherwiththecontrolfunction.
Inthecaseofspecial,hardsealmaterials,thesealfunctioncouldnotbeensured.Inthiscaseanaddi-
tionalshut-offvalvemayberequired.
TheLFCorLFMistypicallycalibratedtounitswhichareusefulforlowflow-ratessuchasl/horml/min.
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Technical Data



Importantdevice-specifictechnicaldataisindicatedontheratingplateandthecalibrationplate
(seeChapter6.1.1. Inscription on the rating plate / calibration plate).
Observepermittedfluidaccordingtoratingplate(dependingonsealmaterial).•
Observepermittedpressurerangeonthecalibrationplateofthedevice.•


8719 LFC WASSER
Made in Germany
00202378 W1XLP
24V DC 0-10V FKM
6,0 l/h
S/N 1006
Calibrationplate
Calibration
Date29. 01. 2009
Pressure   2.0 bar
Horizontalmountingposition
Ratingplate
8719 LFC WASSER
Made in Germany
00202378
W1XLP
24V DC 0-10V
6,0 l/h
S/N 1006
Rating plate, calibration plateFig. 3:
 
Exampleofratingplate
8719 LFC WASSER
Made in Germany
00202378 W1XLP
24V DC 0-10V FKM
6,0 l/h
S/N 1006
Type
Briefdescriptionofthedevice
Operatingfluid
Finalvalue(Qnom)andunit
Powersupplyvoltage,actualvalue
Sealmaterial
Serialnumber,CEidentification
Barcode
Identificationnumberofthedevice
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17
Technical Data
Exampleofcalibrationplate
Calibration
Date28. 01. 2009
Pressure   2.0 bar
Horizontalmountingposition
Calibrationdate
Calibrationpressure
Mountingposition



TheLFC/LFMisnotdesignedforunrestricteduseoutdoors.
Ifthedeviceisnotprotectedfromtheelements,thereisariskofinjuryfromthedevicefailing.
Protectthedevicefromdirectsunlight.•
Ensurethattheambienttemperaturepermittedforthedeviceisobserved.•
Protectthedevicefromhumidityinconsiderationoftheprotectionclassindicatedbelow.•

Ambienttemperature:     Operation: 0–+55°C
Storage: -10–+70°C
Fluidtemperature:      +10–+40°C
Permittedairhumidity:     0–95%,withoutcondensation
Operatingfluids:      cleanandlow-viscosityliquids
Protectionclassin
accordancewithDINEN60529: Types8709and8719:IP65(onlyifcables,plugsandsocketshavebeen
connectedcorrectly)
Types8708and8718:IP40

CEmarkconformstoEMCDirective2004/108/EEC(previously:89/336/EEC)
(onlyifcables,plugsandsocketshavebeenconnectedcorrectly)
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

18
Technical Data

Mountingposition:   horizontalorvertical
(seecalibriationplate/calibrationprotocol)
Material:      Housing:Types8709and8719:Stainlesssteel1.4404
Types8708and8718:Stainlesssteel1.4404
         Cover: Types8709and8719:PTB
Types8708and8718:PC
Sealingmaterial   FKM,EPDM,FFKM(seeratingplate)
Weight:      Types8709and8719:approx.1200g(stainlesssteel)
Types8708and8718:approx.1000g(stainlesssteel)
Dimensions:
(LxHxW)     Types8709and8719:115mmx137.5mmx37mm 
Types8708and8718:107mmx115.5mmx28mm
Types8708and8718withflangedconnection:107mmx115.5mmx43mm
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

19
Technical Data


M4-8deep
A
A
71
10
97
23
42
M4-8deep
4
10
12.5
37
115

G1/4 G1/8
NPT1/4 NPT1/8
137.5
Installation dimensions LFC Type 8719 and LFM Type 8709Fig. 4:
english


20
Technical Data


G1/4 G1/8
NPT1/4 NPT1/8
M4-8deep
A
A
71
10
137.5
97
23
42
M4-8deep
4
10
12.5
37
115
112
16.5
Installation dimensions LFC Type 8719 and LFM Type 8709, field bus versionFig. 5:
english
