Burkert 8756 User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Type 8756
büS / CANopen
Analogue
Mass Flow Meter (MFM) for liquids / Mass Flow Controller (MFC) for liquids
Massendurchflussmesser (MFM) für Flüssigkeiten / Massendurchflussregler (MFC) für Flüssigkeiten
Débitmètre massique (MFM) pour liquides / Régulateur de débit massique (MFC) pour liquides

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert SAS, 2020
Operating Instructions 2010/01_EU-ML_00573797 / Original EN

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Table of contents
Type 8756
1 THE OPERATING INSTRUCTIONS ............................................. 6
1.1 Denitionofthetermproduct........................................ 6
1.2 DenitionofthetermbüS.............................................. 6
1.3 AboutNamurandtheNamurRecommendationNE1076
1.4 Symbolsused ................................................................ 6
2 INTENDED USE .................................................................... 7
3 BASIC SAFETY INSTRUCTIONS.......................................... 8
4 GENERAL INFORMATION .................................................... 9
4.1 Contact .......................................................................... 9
4.2 Warranty ........................................................................ 9
4.3 InformationontheInternet ............................................ 9
5 DESCRIPTION..................................................................... 10
5.1 Productvariants........................................................... 10
5.1.1 MassFlowMeter(MFM)................................... 10
5.1.2 MassFlowController(MFC)............................. 11
5.2 PumpofanMFC ......................................................... 11
5.3 Productstatus-indicator .............................................. 12
5.4 Memorycard ............................................................... 13
5.5 Bürkert-Communicatorsoftware ................................. 13
5.5.1 büS/CANopenvariant ..................................... 14
5.5.2 Analoguevariant............................................... 15
6 TECHNICAL DATA............................................................... 16
6.1 Conformity ................................................................... 16
6.2 Standards .................................................................... 16
6.3 Operatingconditions ................................................... 16
6.4 Mechanicaldata .......................................................... 17
6.5 Fluiddata..................................................................... 17
6.5.1 MassFlowMeter.............................................. 17
6.5.2 Pressureloss,MFM.......................................... 18
6.5.3 MassFlowController ....................................... 19
6.5.4 Pressureloss,MFC .......................................... 21
6.6 Electricaldata .............................................................. 21
6.6.1 büS/CANopenvariant ..................................... 21
6.6.2 Analoguevariant............................................... 22
6.7 Markings ...................................................................... 23
6.7.1 Calibrationlabel................................................ 23
6.7.2 Typelabel ......................................................... 23
6.7.3 Additionalmarkings.......................................... 24
6.8 Servicelifeofthepump............................................... 24
7 INSTALLATION .................................................................... 24
7.1 Safetyinstructions ....................................................... 24
7.2 Installationsteps.......................................................... 25
7.3 Additionaldocumentation ........................................... 25
7.4 Fluidinstallation........................................................... 25
7.4.1 G1/8''threadeduidconnections.................... 27
7.4.2 NPT1/8''threadeduidconnections................ 27
7.4.3 Fluidconnectionswithvacuumttings............ 27
7.4.4 Fluidconnectionswithdouble-ferrulettings .. 28
8 ELECTRICAL INSTALLATION ............................................. 28
8.1 Safetyinstructions ....................................................... 28
8.2 WiringthebüS/CANopenvariant................................ 29
8.2.1 WithbüSextensioncablesfromBürkert.......... 29
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Type 8756
8.2.2 WithbüScablesfromBürkert .......................... 30
8.2.3 WithCANopencables ...................................... 31
8.3 WiringtheAnaloguevariant......................................... 32
8.3.1 Digitalinput ...................................................... 34
8.3.2 Relayoutput ..................................................... 35
8.4 Connectingthefunctionalearth .................................. 35
9 START-UP............................................................................ 36
9.1 Safetyinstructions ....................................................... 36
9.2 Start-upsteps.............................................................. 36
10 OPERATION ........................................................................ 37
10.1Safetyinstructions ....................................................... 37
10.2Functions ..................................................................... 38
10.2.1Empty-pipedetection....................................... 38
10.2.2Bubbledetection .............................................. 38
10.2.3Flushbubblesfromthepipe............................. 39
10.2.4Cut-o .............................................................. 39
10.2.5Fillthepipewithoutdamagingthe
pump(MFC) ..................................................... 39
10.2.6Emergencystopofthepump(MFC) ................ 40
10.3SettingsspecictothebüS/CANopenvariant ........... 40
10.3.1SettheCANopencommunicationor
thebüScommunication ................................... 40
10.3.2Increasethedatatransmissionspeed ............. 40
10.4OperatingmodesofanMFC ....................................... 41
10.5Normaloperatingmode(MFC) .................................... 42
10.5.1büS/CANopenvariant ...................................... 42
10.5.2Analoguevariant............................................... 42
10.6Optimisethecontrolparameters(MFC) ............................ 43
10.7Specifythesourcethatgivestheset-pointvalue
(MFC) ........................................................................... 43
10.8Set-pointvalueswithoutcommunication(büS/
CANopenMFC) ........................................................... 44
11 MAINTENANCE................................................................... 45
11.1Maintenanceforoperationwithheavilycontami-
nateduids .................................................................. 45
11.2Replacingthememorycard ........................................ 46
11.3Troubleshootingiftheproductstatus-indicator
showsaproblem ......................................................... 47
11.3.1Troubleshootingiftheproductsta-
tus-indicatorisred ........................................... 47
11.3.2Troubleshootingiftheproductsta-
tus-indicatorisorange...................................... 48
11.3.3Troubleshootingiftheproductsta-
tus-indicatorisyellow ...................................... 49
11.3.4Troubleshootingiftheproductsta-
tus-indicatorisblue.......................................... 50
11.4Troubleshootingofotherproblems.............................. 51
11.4.1Productstatus-indicatorisOFF,is
ashingorgoesoutperiodically ...................... 51
11.4.2Replacementproductadoptsnoneor
notallofthevaluesfromthedefective
product............................................................. 51
11.4.3Nomassowrate............................................. 52
11.4.4Unstablemeasuredvalue................................. 52
11.4.5Set-pointproblems,MFCvariants ................... 53
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Type 8756
12 ACCESSORIES /SPARE PARTS......................................... 54
12.1Electricalaccessories .................................................. 54
12.2Additionalsoftware ...................................................... 54
13 DECOMMISSIONING.......................................................... 55
13.1Safetyinstructions ....................................................... 55
13.2Dismantling.................................................................. 55
14 TRANSPORT....................................................................... 56
15 STORAGE, DISPOSAL ........................................................ 57
16 RETURNING THE PRODUCT ............................................. 57
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The Operating instructions
Type 8756
1 THE OPERATING INSTRUCTIONS
The Operating Instructions describe the entire life cycle of the
product.PleasekeeptheOperatingInstructionsinasafeplace,
accessibletoallusersandanynewowners.
Important safety information.
PleasecarefullyreadtheOperatingInstructionsPayparticular
attentiontothechpt."Basicsafetyinstructions"and"Intended
use".
▶ReadtheOperatingInstructions.Ifyoudonotunderstandthe
contentoftheOperatingInstructions,contactBürkert.
1.1 
Theterm"product"asusedintheOperatingInstructions,refers
tooneorseveralofthefollowingproducts:
•aType8756-büS/CANopenMassFlowMeter(MFM)
•aType8756-AnalogueMassFlowMeter(MFM)
•aType8756-büS/CANopenMassFlowController(MFC)
•aType8756-AnalogueMassFlowController(MFC)
1.2 
Theterm"büS"usedintheseOperatingInstructionsreferstothe
Bürkertsystembus,thatisbasedontheCANopenprotocol.
FormoreinformationonbüS,readthecablingguideavailablein
EnglishandGermanatcountry.burkert.comsearchfor"Guidefor
planningbüSnetworks".
FormoreinformationonCANopenwhichisrelatedtothe
product,refertotheOperatingInstructions"CANopenNetwork
conguration"atcountry.burkert.com.
1.3 

Standardscommitteeformeasurementandcontroltechnology
(NAMUR)isaninternationalassociationofusersofautomation
systemsfortheprocessindustry.
NAMURrecommendation(NE)107:self-monitoringanddiag-
nosisofelddevices.
1.4 
DANGER
The symbol warns of an immediate danger.
▶Failuretoobservethewarningresultsinfatalorseriousinjuries.
WARNING
The symbol warns of a potentially dangerous situation.
▶Failuretoobservethewarningmayresultinseriousorfatal
injuries.
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Intended use
Type 8756
CAUTION
The symbol warns of a possible danger.
▶Failuretoobservethewarningmayresultinmoderateorminor
injuries.
NOTICE
The symbol warns of damage to property.
▶Failuretoobservethewarningmayresultindamagetothe
productorsystem.
Indicatesimportantadditionalinformation,tipsand
recommendations.
ReferstoinformationintheOperatingInstructions,orin
otherdocuments.
▶Designatesaninstructionforriskprevention.
→Designatesaworkstepthatyoumustcarryout.
Indicatesaresult.
MenuDesignatesatextofauserinterface.
2 INTENDED USE
Improper use of the product may be a hazard to people,
nearby equipment and the environment.
Type 8756 MFM is used exclusively to measure the mass ow
rate of liquids.
Type 8756 MFC is used exclusively to measure and regulate
the mass ow rate of liquids.
▶Observethedatainthecontractdocuments,intheOper-
atingInstructions,ontheTypelabelandonthecalibration
label:
-additionaldata
-operatingconditions
-serviceconditions
▶Onlyusetheproductindoors.
▶Onlyusetheproductuptoanaltitudeof2000m.
▶Onlyusetheproductwithexternalinstrumentsthattheprod-
uctmanufacturerrecommends.
▶Onlyusetheproductwithcomponentsthattheproduct
manufacturerrecommends.
▶Operatetheproductcarefullyandensureregularandprofes-
sionalmaintenance.
▶Operatetheproductonlyinperfectworkingorder.Ensure
appropriatestorage,transport,installationanduse.
▶Onlyusetheproductforitsintendedpurpose.
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Basic safety instructions
Type 8756
3 BASIC SAFETY INSTRUCTIONS
Thesafetyinstructionsdonottakeintoaccountanycontin-
genciesoroccurrencesthatmayariseduringinstallation,use
andmaintenanceoftheproduct.
Theoperatingcompanyisresponsiblefortherespectofthelocal
safetyregulationsincludingforthepersonnelsafety.
Risk of injury that is due to pressure in the installation or in
the product.
▶Beforeworkingontheinstallationorproduct,cutthepres-
sure.Ventanddrainthepipes.
Risk of injury from electric shocks.
▶Beforeworkingontheinstallationorproduct,switchothe
power.Makesurethatnobodycanswitchthepoweron.
▶Observeallapplicableaccidentprotectionandallapplicable
safetyregulationsforelectricalequipment.
Burn hazard and re hazard that are due to hot surface of the
product.
▶Donottouchthehotsurfacewithbarehands.
▶Wearsafetyglovestotouchtheproduct.
▶Keeptheproductawayfromanyhighlyammablematerials
oruids.
Risk of injury that is due to escape of the uid.
Youcanbeinjuredthroughcontactwiththeoperatinguid,its
reactionproducts,andvapours.
Youcanbeinjuredthroughinhalationofvapours.
▶Observeallapplicableaccidentprotectionandallapplicable
safetyregulationsrelatingtotheoperatinguidused.
Various dangerous situations.
Toavoidpersonalinjury,obeythefollowinginstructions:
▶Onlyoperatetheproductwithaltereduid.
▶Makesuretheproductoperating-pressureisnothigherthan
theoperatingpressurevalueontheproductdata-sheet.
Findthedatasheetonourhomepage:
country.burkert.com
▶Onlyusetheproductforuidsthatarecompatiblewiththe
productmaterials.
▶Donotmakeanymodicationstotheproductanddonot
subjecttheproducttomechanicalstress.
▶Protecttheinstallationandtheproductfromaccidental
actuation.
▶Onlytrainedpersonnelmayperformtheinstallationworkand
themaintenancework.
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General information
Type 8756
Various dangerous situations.
Toavoidpersonalinjury,obeythefollowinginstructions:
▶Afteraninterruptionintheelectricalsupplyorintheuid
supply,ensureacontrolledrestartoftheprocess.
▶Observebestindustrypractice.
NOTICE
Components or assemblies at risk from electrostatic
charges.
Theproductcontainselectroniccomponentswhicharesuscep-
tibletoelectrostaticdischarge(ESD).Contactwithelectrostati-
callychargedpersonsorobjectsendangersthesecomponents.
Intheworstcase,theywillbecomedefectiveimmediatelyorwill
failwhenenergized.
•Tominimiseorevenavoidanydamagecausedbyanelec-
trostaticdischarge,takealltheprecautionsdescribedinthe
EN61340-5-1.
•Donottouchanyoftheliveelectricalcomponents.
4 GENERAL INFORMATION
4.1 
Thenameofthemanufacturerisdisplayedasinsetwritingonthe
coverandthehousingoftheproduct.
Tocontactthemanufactureroftheproduct,usethefollowing
address:
Germany
BürkertFluidControlSystems
SalesCenter
Christian-Bürkert-Str.13-17
D-74653Ingelngen
Germany
Tel.+49(0)7940-1091111
Fax+49(0)7940-1091448
Email:[email protected]
Theaddressesofourinternationalsalesocesareavailableon
theinternetat:country.burkert.com
4.2 
Thewarrantyisconditionaloncompliantuseoftheproductin
observanceoftheoperatingconditionsspeciedintheOper-
atingInstructions.
4.3 
OperatingInstructionsanddatasheetsfortheproductcanbefound
onlineat:country.burkert.com
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Description
Type 8756
5 DESCRIPTION
5.1 
5.1.1 
3
10
11
4
2
6
9
8
7
13
5
12
1
1. Electricalconnection,Analoguevariantonly:5-pinM12
femaleconnector,Acoding
2. Electricalconnection:5-pinM12maleconnector,Acoding
3. Possibleuidconnections:
•G-threadeduidconnectionsaccordingtoDINISO228/1
•NPT-threadeduidconnectionsaccordingtoASME/
ANSIB1.20.1
•uidconnectionswithmalevacuum-ttings
•uidconnectionswithmalecompression-ttings
4. M4screwforfunctionalearthconnection
5. Baseblock
6. Productstatus-indicator.Theindicatoroperatesaccording
toNamurNE107.
7. StatusindicatoroftheconnectiontotheEthernetport1
8. Statusindicatoroftheeldbuscommunication
9. StatusindicatoroftheconnectiontotheEthernetport2
10.M3screw
11. Cover
12. büS-interfaceforBürkert-Communicatorsoftware
13. Slotforthememorycard
Fig. 1: Mass Flow Meter variants
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11
Description
Type 8756
5.1.2 
3
11
12
4
2
7
10
9
8
14
5
13
1
6
1. Electricalconnection,Analoguevariantonly:5-pinM12
femaleconnector,Acoding
2. Electricalconnection:5-pinM12maleconnector,Acoding
3. Possibleuidconnections:
•G-threadedconnectionsaccordingtoDINISO228/1
•NPT-threadedconnectionsaccordingtoASME/
ANSIB1.20.1
•malevacuum-ttingconnections
•malecompression-ttingconnections
4. M4screwforfunctionalearthconnection
5. Baseblock
6. Pump
7. Productstatus-indicator.Theindicatoroperatesaccording
toNamurNE107.
8. StatusindicatoroftheconnectiontotheEthernetport1
9. Statusindicatoroftheeldbuscommunication
10.StatusindicatoroftheconnectiontotheEthernetport2
11. M3screw
12. Cover
13. büS-interfaceforBürkert-Communicatorsoftware
14. Slotforthememorycard
Fig. 2: Mass Flow Controller variants
5.2 
Thepumpisamicro-annulargearpump.
NOTICE
The micro-annular gear pump is not completely tight.
▶Toavoidpossibleproblemsthatareduetoleackage,make
surethatthereisnouidowwhenthepumpisswitched
o.Takeintoaccountthestaticpressure.
NOTICE
Risk of damage to the pump due to the suction pressure.
▶Thesuctionpressuremustbeaslowaspossibleandalways
lowerthan200mbar.
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Description
Type 8756
5.3 
Theproductstatusindicatorshowstheproductstate.ThecolouroftheproductstatusindicatorisbasedontheNAMURNE107recom-
mendation.RefertoTab.1.Ifdierentproductstateshavebeengenerated,thecolouroftheproductstatusindicatorshowstheproduct
statewiththehighestpriority.Messagesrelatedtotheproductstatesarelistedandpossiblytransmittedonanyconnectedeldbus.
Iftheproductstatusindicatorashes,thentheproductisselectedinaman-machineinterfacesuchastheBürkertCommunicator
software.
Tab. 1: Product status indicator in accordance with NAMUR NE107, edition 2006-06-12, active diagnostics
Colour of the product
status indicator
Colour code
(for a PLC) Product status Meaning
Green 1- Noeventhasbeengenerated.
Blue 2Maintenancerequired
→Dotherequiredmaintenanceoperation.
• MFM:Theproductcontinuestomeasure.
• MFC:Theproductcontinuestoregulate,butafunctionistemporarilyrestricted.
Yellow 3Outofspecication
Theambientconditionsorprocessconditionsfortheproductareoutsidethespec-
iedranges.
Productinternaldiagnosticspointtoproblemsintheproductorwiththeprocess
properties.
Orange 4Functioncheck
Workisdoneontheproduct.
• MFM:Theoutputsignalistemporarilyinvalid.
• MFC:Theproductcannotregulatetemporarily.
Red 5Failure,error,
malfunction
• MFM:Duetoamalfunctionoftheproductoritsperiphery,themeasuredvalues
arenotvalid.
• MFC:Duetoamalfunctionoftheproductoritsperiphery,themeasuredvalues
arenotvalidandtheproductcannotregulateanymore.
→Tosolveaproblemindicatedbytheproductstatus-indicator,refertochpt11.3Troubleshootingiftheproductstatus-indicator
showsaproblem.
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Description
Type 8756
5.4 
NOTICE
Ifthememorycardisdefectiveorlost,thenbuyanewmemory
cardfromyourBürkertsalesoce.
Theproduct is deliveredwith a memory cardthat is insertedin
theproduct.
Atproductstart-up,therearetwopossibilities:
•Ifproduct-specicdataisstoredontheinsertedmemorycard,
theproductadoptsthedata.Atproductdelivery,thememory
cardcontainsproduct-specicdata.Togetalistofthestored
data,refertotheHelpfortheInitiationlethatcanbedown-
loadedfromcountry.burkert.com.
•Iftheinsertedmemorycardisempty,theproductloadsits
owndataonthememorycard.Anewmemorycardisempty.
Thedataonthememorycardcanbetransferredtoanotherproduct
withthesamearticlenumber.Forexample,thedatacanbetrans-
ferredfromadefectiveproducttoanewproduct.
5.5 
TheMassFlowCommunicatorisanotherPCsoftwarethat
isnotcompatiblewiththeproduct.Youcannotusethe
PCsoftwareMassFlowCommunicatortocongureor
operatetheproduct.
TheType8920Bürkert-CommunicatorisaPC-softwareand
enablesthefollowingactions,forexample:
•Settingtheparametersoftheproduct,forexamplethebasic
settingsfortheproductstart-up
•Runningthediagnostics,andreadtheerrormemoriesfor
example
•Updatingtheproductsoftware
TousetheType8920Bürkert-Communicatorsoftware,referto
thechapterthatisrelatedtotheproductvariant:
•büS/CANopenvariant,refertochpt.5.5.1.
•Analoguevariant,refertochpt.5.5.2.
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Description
Type 8756
5.5.1 
TodothesettingswiththeType8920Bürkert-Communicator
software,dothefollowingsteps:
→BuytheUSB-büS-interfacesetwitharticlenumber00772426
fromBürkert.SeeFig.3.
büSstickwithtermina-
tion-resistanceswitch
Fig. 3: USB-büS-interface set with article number 00772426
→DownloadthelatestversionoftheType8920Bürkert-Com-
municatorsoftwarefromcountry.burkert.com
→Duringinstallation,thebüSstickmustnotbeinsertedatthe
PC.InstalltheBürkert-CommunicatorsoftwareonaPC.
ObeytheinstallationrecommendationsgivenintheUSB-
büS-interfaceset.
Fig.4showstheelectricalconnectionpartsthatareusedfrom
theUSB-büS-interfaceset.
→Insertthemicro-USBplugintothebüSstick.
→InserttheappropriatepoweradapterintotheAC/DCadapter.
→Connectthejackmale-connectoroftheAC/DC-adapter
cabletothejackfemale-connectoroftheM12female-con-
nectorcable.
→ConnecttheM12femaleconnectortothebüSnetwork.
micro-USB
connector
jackmale-connector
jack
female-connector AC/DCadapter
5-pinM12female
connector
Fig. 4: Electrical connection parts of the USB-büS-interface set with
article number 00772426
→IftheproductisconnectedtooneortheotherendofbüS,
thensetthetermination-resistanceswitchofthebüSstick
toON.Elsesetthetermination-resistanceswitchofthebüS
sticktoOFF.
→InsertthebüSstickintoaUSBportofthePC.
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Description
Type 8756
→WaituntiltheWindowspilotofthebüSstickhasbeencom-
pletelyinstalledonthePC.
→ConnecttheAC/DCadaptertothepowersupply.
→StarttheBürkert-Communicatorsoftware.
→Clickon intheBürkert-Communicatorsoftwareto
establishthecommunicationbetweentheBürkert-Communi-
catorsoftwareandtheproduct.Awindowopens.
→SelectbüS-Stick.
→ChoosetheportBürkert büS Stick,clickonFinishandwait
untiltheproductsymbolappearsinthelistofdevices.
→Inthelistofdevices,clickonthesymbolrelatedtothe
product:themenustructurefortheproductisdisplayed.
5.5.2 
→BuytheUSB-büS-interfacesetwitharticlenumber00772551
fromBürkert.
→DownloadthelatestversionoftheType8920Bürkert-Com-
municatorsoftwarefromcountry.burkert.com
→InstalltheBürkert-CommunicatorsoftwareonaPC.During
installation,thebüSstickmustnotbeinsertedatthePC.
→AssemblethepartsoftheUSB-büS-interfaceset.Referto
Fig.5.
Fig. 5: Assembled parts of the USB-büS-interface set with article
number 00772551
→Setthetermination-resistanceswitchofthebüSsticktoON.
→InsertthebüSstickintoaUSBportofthePC.
→Energizetheproduct.Refertochpt.8Electricalinstallation.
→Insertthemicro-USBconnectorintothebüS-interfaceforthe
BürkertCommunicatorsoftware.ThelocationofthebüS-in-
terfaceisgiveninchpt.5.1onpage10.
→WaituntiltheWindowspilotofthebüSstickhasbeencom-
pletelyinstalledonthePC.
→StarttheBürkert-Communicatorsoftware.
→Clickon intheBürkert-Communicatorsoftwareto
establishthecommunicationbetweentheBürkert-Communi-
catorsoftwareandtheproduct.Awindowopens.
→SelectbüS-Stick.
→ChoosetheportBürkert büS Stick,clickonFinishandwait
untiltheproductsymbolappearsinthelistofdevices.
→Inthelistofdevices,clickonthesymbolrelatedtothe
product:themenustructurefortheproductisdisplayed.
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Technical data
Type 8756
6 TECHNICAL DATA
6.1 
TheproductcomplieswiththeEUdirectivesaccordingtotheEU
declarationofconformity(ifapplicable).
6.2 
Theappliedstandards,whichverifyconformitywiththeEUdirec-
tives,canbefoundontheEUtypeexaminationcerticateand/or
theEUdeclarationofconformity(ifapplicable).
6.3 
WARNING
Risk of injury caused by pressure, uid escape.
▶Donotexceedthemaximumoperatingpressure.Thevalue
oftheoperatingpressureisgivenintheproductdatasheet.
WARNING
Risk of injury from malfunction that is due to outdoor use.
▶Donotusetheproductinoutdoorareas.
Tab. 2: Operating conditions of the product
Ambienttemperature 0°C...+50°C
Fluidtemperature
•MFM •–10°C...+70°C,onlyinliquidstate
•MFC •–10°C...+60°C,onlyinliquidstate
Ambienthumidity <95%,non-condensing
IP-Codeaccordingto
EN60529
Underthefollowingconditions:
•Cablesmustbeconnected.
•Matingconnectorsmustbeplugged
inandtightened.
•MFM •IP651),IP671)
•MFC •IP401)
Operatingpressure
•MFM •Max.16bar
•MFC
- Inlet pressure - 0 bar
- Outlet pressure - Max. 10 bar
1) The IP-Code is determined by Bürkert. The IP-Code is not evaluated
according to UL61010.
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Technical data
Type 8756
6.4 
Dimensions,weight:seedatasheetoftheproduct
Tab. 3: Materials of the product
Productpart Material
Base-block Stainlesssteel316L
Housing Paintedaluminium,stainlesssteel
Sealing RefertotheTypelabel
Product
status-indicator Polycarbonate
Tab. 4: Specic materials of an MFC
Wettedparts Carbide,epoxy-resinadhesive
6.5 
6.5.1 
Tab. 5: Fluid data, MFM
Calibrationconditions
•Calibrationuid •Water
•Temperatureofthecali-
brationuid
•25°C
•Calibrationpressure •4bar
Operatinguid Liquids
Qualityoftheoperatinguid
•Liquids •Cleanliquids
•Maximumparticlesize •10μm
•Minimumdynamicviscosity •0.3mPa.s
•Maximumdynamicviscosity •200mPa.s
Takethepressurelossinto
account.Refertochpt.6.5.2.
Densitymeasurement
•Densityrange •0...5kg/l
•Measurementaccuracyfor
massowratevalueshigher
than1.5kg/h
•±0.01kg/l
•Repeatabilityformassow
ratevalueshigherthan
1.5kg/h
•±0.005kg/l
Temperaturemeasurement
•Temperaturerange •–10...70°C
•Measurementaccuracyfor
massowratevalueshigher
than1.5kg/h
•±1.0°C
•Repeatabilityformassow
ratevalueshigherthan
1.5kg/h
•±0.5°C
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Technical data
Type 8756
Massflowratemeasurement
•Massowraterange •0.1...25kg/h
•Measurementaccuracyafter
1minutewarm-uptime
•±0.2%ofthemeasured
valuePLUS±0.0014kg/h.
0.0014kg/h=zero-point
stability
•Maximummeasurement
range
•1:250
Themeasurementrange
isdenedastheratioof
Qnominaloftheproductto
Qmin.Qmin=0.1kg/h.Refer
toFig.6.
•Repeatability •±0.1%ofthemeasured
valuePLUS±0.0007kg/h
0.0007kg/h=zero-point
stability
Responsetime(t95%) <300ms
Theresponsetimedependson
theoperatinguidused
02.5 5 7.5 10 12.5 15 22.517.5 20
25
[kg/h]
100
50
150
200
250
NominalowrateQ
Measurementrange
Fig. 6: MFM: Measurement range depending on nominal ow rate
6.5.2 
AMassFlowMeter(MFM)hasapressurelossthatdependsonthe
followingparameters:
•theow-ratevalue
•theproductuid-connectionsize
•theproductuid-connectiontype
•theproductbaseblock
•theoperatinguid
ThepressurelossinanMFMcanbereadfromthediagramin
Fig.7.
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19
Technical data
Type 8756
[kg/h]
∆p [bar]
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0510 15 20
25
1/8''
Fig. 7: Pressure loss diagram, MFM, for water, in the measurement
range 0...25kg/h
6.5.3 
Tab. 6: Fluid data, MFC
Calibrationconditions
•Calibrationuid •Water
•Temperatureofthecali-
brationuid
•25°C
•Calibrationpressure •4bar
Operatinguid Liquids
Qualityoftheoperatinguid
•Liquids •Cleanliquids
•Maximumparticlesize •10μm
•Minimumdynamic
viscosity
•0.3mPa.s
•Maximumdynamic
viscosity
•200mPa.s,withreduced
ow-raterange.Iftheowrate
isequalto8kg/h,thenthe
uidviscositymustbemax.
50mPa.s.
Takethepressurelossinto
account.Refertochpt.6.5.4.
Densitymeasurement
•Densityrange •0...5kg/l
•Measurementaccuracy
formassowratevalues
higherthan1.5kg/h
•±0.01kg/l
•Repeatabilityformassow
ratevalueshigherthan
1.5kg/h
•±0.005kg/l
Temperaturemeasurement
•Temperaturerange •–10...60°C
•Measurementaccuracy
formassowratevalues
higherthan1.5kg/h
•±1.0°C
•Repeatabilityformassow
ratevalueshigherthan
1.5kg/h
•±0.5°C
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20
Technical data
Type 8756
Massflowratemeasurement
•Massowraterange •0.1...8kg/h
•Controlaccuracyafter
1minutewarm-uptime
•±0.2%ofthemeasured
valuePLUS±0.0014kg/h.
IfQmin<0.3kg/h,thenthe
controlaccuracy canbe
higher.
0.0014kg/h=zero-point
stability
•Maximummeasurement
range
•1:80
Themeasurementrangeis
denedastheratioofQnominal
oftheproducttoQmin.
Qmin=0.1kg/h.RefertoFig.8.
Settlingtime(t95%) <1s,forwaterat20°C
Thesettlingtimedependson
theoperatinguidused.
NominalowrateQ
Measurementrange
012345
678
[kg/h]
40
20
60
80
10
30
50
70
Fig. 8: MFC: Measurement range depending on nominal ow rate
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