Burkert 8741 User manual

Operating Instructions
Bedienungsanleitung
Manuel d‘utilisation
Type 8741, 8742
büS/CANopen
Mass Flow Meter (MFM) / Mass Flow Controller (MFC)
Massendurchflussmesser (MFM) / Massendurchflussregler (MFC)
Débitmètre massique (MFM) / Régulateur de débit massique (MFC)

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert SAS, 2014–2022
Operating Instructions 2206/05_EU-ML_00810383 / Original EN

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Table of contents
Type 8741 / 8742
1 OPERATING INSTRUCTIONS............................................... 5
1.1 Denitionofterms ........................................................ 5
1.2 Symbols used............................................................... 5
2 INTENDED USE .................................................................... 6
2.1 Versions with explosion protection............................... 6
3 BASIC SAFETY INFORMATION............................................ 7
4 GENERAL INFORMATION .................................................... 8
4.1 Manufacturer’s name, manufacturer’s address
and international contacts............................................ 8
4.2 Warranty ....................................................................... 8
4.3 Information on the Internet ........................................... 8
5 DESCRIPTION OF THE DEVICE........................................... 9
5.1 Design of the device..................................................... 9
5.2 General description .................................................... 10
5.3 Operation of the MFM (Mass Flow Meter).................. 10
5.4 Operation of the MFC (Mass Flow Controller) ............ 10
5.5 Operation of the sensor in the device ........................ 12
6 TECHNICAL DATA............................................................... 13
6.1 Conformity.................................................................. 13
6.2 Standards ................................................................... 13
6.3 Certication ................................................................ 13
6.4 Operating conditions .................................................. 13
6.5 Mechanical data ......................................................... 14
6.6 Fluid data.................................................................... 14
6.7 Electrical data............................................................. 15
6.8 Markings..................................................................... 16
7 INSTALLATION.................................................................... 17
7.1 Safety instructions...................................................... 17
7.2 Before installation....................................................... 18
7.3 Mechanical installation ............................................... 18
7.4 Fluid system installation ............................................. 18
7.5 Installation and removal of the impact pro-
tection cover and blind plug on type 8742................. 20
7.6 Settinguptheeldbus ............................................... 21
7.7 Electrical installation................................................... 23
7.8 Connecting the functional earth ................................. 25
7.9 Connecting the cable screen...................................... 26
8 COMMISSIONING............................................................... 26
8.1 Safety instructions...................................................... 26
9 OPERATION AND FUNCTION ............................................ 27
9.1 Safety instructions...................................................... 27
9.2 Normal control mode.................................................. 27
9.3 Device status LED ...................................................... 27
9.4 Settinguptheeldbus ............................................... 28
9.5 Replaceablecongurationmemory............................ 28
9.6 Functions .................................................................... 30
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Type 8741 / 8742
10 MAINTENANCE................................................................... 34
10.1 Maintenance for operation with heavily con-
taminated media......................................................... 34
10.2 Cleaning and recalibration at the factory.................... 35
11 DEVICE STATUS/TROUBLESHOOTING............................. 36
11.1 Display of the device status ....................................... 36
11.2 Troubleshooting.......................................................... 38
12 ACCESSORIES /SPARE PARTS......................................... 39
12.1 Electrical Accessories................................................. 39
12.2 Fluid accessories........................................................ 40
12.3 BürkertCommunicator(PCsoftware) ........................ 40
12.4 Additional documentation .......................................... 41
12.5 Spare parts ................................................................. 41
13 DECOMMISSIONING.......................................................... 41
13.1 Safety instructions...................................................... 41
13.2 Dismantling the device ............................................... 42
14 TRANSPORT, STORAGE, DISPOSAL................................. 43
15 RETURNING THE DEVICE.................................................. 43
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Operating instructions
Type 8741 / 8742
1 OPERATING INSTRUCTIONS
The Operating Instructions describe the entire life cycle of the
device. Please keep the Operating Instructions in a safe place,
accessible to all users and any new owners.
Important safety information!
Please read the manual carefully. Pay particular attention to the
sections 3 Basic safety information and 2 Intended use.
▶The Operating Instructions must be read and understood.
1.1 Denition of terms
The term "device" as used within the Operating Instruc-
tions,alwaysreferstotheMFM/MFCtype8741/8472with
büS/CANopendigitalcommunication.
1.2 Symbols used
The following symbols are used in these instructions.
DANGER!
Warns of immediate danger!
▶If ignored, death or serious injury will result.
WARNING!
Warns of a situation which is possibly dangerous!
▶If ignored, serious injury or death may result.
CAUTION!
Warns of possible danger!
▶Failure to observe this warning can result in substantial or
minor injuries.
NOTE!
Warns of damage to property!
Important advice and recommendations.
Refers to information in this operating manual, or in other
documents.
▶Indicates a risk prevention statement.
→Indicates a procedure that must be carried out.
Indicates a result.
MenuIdentiesatextofauserinterface.
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Intended use
Type 8741 / 8742
2 INTENDED USE
Improper use of the device may be a hazard to people, nearby
equipment and the environment.
MFM type 8741/8742 is used exclusively to measure the mass
ow of clean dry gases.
MFC type 8741/8742 is used exclusively to control the mass
ow of clean dry gases.
▶Observe the additional data, operating and service conditions
speciedinthecontractdocuments,theOperatingInstructions
and on the name plate and calibration plate.
The device
▶Use only for the media indicated on the name plate and in
the calibration protocol.
▶only use indoors.
▶onlyuseuptoanaltitudeof2000m.
▶Use only in conjunction with external instruments and compo-
nents recommended by Bürkert.
▶Operate carefully and ensure regular, professional
maintenance.
▶Operate only in perfect working order and ensure appropri-
ate storage, transport, installation and control.
▶Use only for its intended purpose.
2.1 Versions with explosion protection
DANGER!
Danger of explosion in the event of improper use in poten-
tially explosive areas!
▶Observethespecicationsoftheconformitycerticate.
▶ForEx.certiedversions,thespecicationsintheATEXsup-
plement for type 8742 available at country.burkert.com must
be observed.
2.1.1 Ex. certication
TheEx.certicationisonlyvalidiftheBürkertdeviceisusedas
describedintheATEXsupplement.
Ifunauthorizedchangesaremadetothedevice,theEx.certication
becomes invalid.
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Basic safety information
Type 8741 / 8742
3 BASIC SAFETY INFORMATION
These safety instructions do not take the following into account:
• any contingencies or occurrences that may arise during instal-
lation, use and maintenance.
• Location-specicsafetyregulations,adherencetowhich,also
on the part of the mounting personnel, is the responsibility of
the operator.
Danger due to high pressure in the installation/device.
▶Before working on the installation or device, cut the pressure
and vent and drain the pipes.
Risk of injury from electric shocks.
▶Before working on the installation or device, switch o the
power and ensure that it cannot be reactivated.
▶Observe the applicable accident protection and safety regu-
lations for electrical equipment!
Burns/re hazard due to hot surface of the device!
▶Keepthedeviceawayfromanyhighlyammablematerials
or media and avoid any contact with bare hands.
Danger due to escape of the medium.
▶Observe the applicable accident protection and safety regu-
lations relating to the operating medium used.
Various dangerous situations.
To avoid personal injury, take care:
▶Not to operate the device without the factory installed input
lters.
▶Only to operate the device in the installation position given
on the calibration plate.
▶That the operating pressure of the device is not higher than
the maximum calibration pressure (MFM) specied on the
calibration plate or the tightness pressure of the proportional
valve (MFC).
▶Toonlyusethedeviceforthemediumspeciedastheoperating
medium in the calibration protocol.
▶Only to use agents that are stable with the device materials
for cleaning and decontamination
The compatibility chart can be found on our homepage:
country.burkert.com.
In the event of any ambiguity please contact your local sales
oce.
▶Donotmakeanymodicationstothedeviceanddonotsubject
the device to mechanical loads.
▶Protect the installation/device from accidental actuation.
▶Only trained personnel may perform installation and mainte-
nance work.
▶After an interruption in the electrical and media supply, ensure
a controlled restart of the process.
▶Observe best industry practice.
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General information
Type 8741 / 8742
NOTE!
Components / assemblies at risk from electrostatic charges!
The device contains electronic components which are susceptible
to electrostatic discharge (ESD). Contact with electrostatically
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 all damage due to an electro-
static 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 Manufacturer’s name,
manufacturer’s address and
international contacts
The name of the manufacturer is displayed as inset writing on the
cover and the housing of the device.
The manufacturer of the device can be contacted at the following
address:
Bürkert SAS
Rue du Giessen
F-67220 TRIEMBACH-AU VAL
Theaddressesofourinternationalsalesocesareavailableon
the internet at: country.burkert.com.
4.2 Warranty
The warranty is conditional on compliant use of the device in
observanceoftheoperatingconditionsspeciedinthismanual.
4.3 Information on the Internet
Operating manuals and data sheets for the type 8741/8742 can be
found online at: country.burkert.com.
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Description of the device
Type 8741 / 8742
5 DESCRIPTION OF THE DEVICE
5.1 Design of the device
Connector*
for electrical con-
nection (4-pin screw
terminals)
Functional earth con-
nection:
M3 screw**
M4 screw**
Fluid connection
Flow direction
LED to display
the device status
(according to
NamurNE107)
Conguration
memory
Setting
Fieldbus
* The removable connector is part of the device
** For cable shielding and earthing of the device
Fig. 1: Design of the device type 8741
34 567
91011
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21
büS ↔CAN
1. Congurationmemory
2. Settingoftheeldbus
3. Mounting screws
4. Impactprotectioncover(onlynecessaryonATEXversions)
5. M12sealingcap(onlyATEXversions)
6. Blindplug(accesstothecongurationmemoryandeldbus
switch)
7. Connector (counterpart is not part of the device) for
electrical connection (5-pin M12 plug)
8. LED to display the device status (according to NAMUR
NE107)
9. Flow direction
10. Functional earth connection: M4-screw for cable shielding
and device earthing
11. Fluid connection
Fig. 2: Design of the device type 8742
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Description of the device
Type 8741 / 8742
5.2 General description
The device is available in two basic versions.
• As a Mass Flow Meter (MFM) the device measures the mass
owofthegasesforwhichithasbeencalibrated.
• As a Mass Flow Controller (MFC) the device measures and
controlsthemassowofthegasesforwhichithasbeen
calibrated. In contrast to the MFM, the MFC also contains a
regulation valve. The gas must be in a dry and clean state.
Digital communication with the device (for example for transfer
of the setpoint or measured value) is achieved via CANopen*- or
büS**.
*CANopen-AeldbusbasedonCAN(ControllerArea
Network) that is used in automation technology for
networking of devices.
**BÜS-ACANopen-basedeldbuswithadditional
functionalities.
5.3 Operation of the MFM (Mass Flow
Meter)
AsensorisintegratedintotheMFMtomeasurethemassow.The
measured value is transmitted to an external device via a digital
output(eldbus).
5.4 Operation of the MFC (Mass Flow
Controller)
Design:
• Themassowismeasuredbyasensor.
• TheMFCisttedwithelectronicsandalow-frictionpropor-
tional valve with a high response sensitivity to control the mass
ow.
NOTE!
Malfunction due to contamination.
Forproblem-freefunctioningoftheMFC,altermustbe
installed in front of the device for contaminated operating
media.
Seechapter6.4.1 Quality of the operating medium.
Operation:
Thesensormeasuresthe mass ow and relays the measured
value to the integrated electronics. The electronics compares the
measured current value (x) with the desired setpoint value (w) and
calculates the control value to be transmitted to the proportional
valve (Y) in order to control its opening.
Themassowiseitherkeptstableataconstantvalueoraltered
accordingtoapredenedprole.
Theregulationisperformedindependentofpressureuctuationsor
increasedowresistance,suchasmightbecausedbydirtylters.
The short response time of the proportional valve and the dynamics
of the sensor determine the setting time.
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