Burkert 8742 Operating manual

Additional Instructions
Zusatzanleitung
Instructions supplémentaires
Type 8742 / 8746
Mass Flow Meter or Mass Flow Controller, with ATEX approval
Massendurchflussmesser oder Massendurchflussregler mit ATEX-Zulassung
Débitmètre massique ou régulateur de débit massique, avec certification ATEX

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert SAS 2016
Operating Instructions 1604/00_EU-ml_00567738 / Original DE

1
Type 8742 / 8746
1. ADDITIONAL INSTRUCTIONS ..................................................................2
1.1. Definition of terms / abbreviation ..............................................2
2. SYMBOLS ............................................................................................................2
3. INTENDED USE ................................................................................................3
3.1. Identification (variable key PX03) ..............................................3
4. PARTICULAR SAFETY INSTRUCTIONS ..............................................4
4.1. Particular conditions .........................................................................5
4.2. Instructions for use in Ex. areas .................................................5
4.2.1. Safety instructions ................................................................ 5
4.2.2. Adhesive label for Ex. areas ................................................ 5
4.2.3. Ambient temperature and temperature class in
the Ex. area .............................................................................6
4.2.4. IP code in Ex. areas .............................................................. 6
4.2.5. Media in the Ex. area ............................................................ 6
4.2.6. Cleaning in the Ex. area ....................................................... 6
4.2.7. Tightening torque of the M12 sealing cap ......................6
4.3. Ex. certification .....................................................................................6
English

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Additional instructions
Type 8742 / 8746
1 ADDITIONAL INSTRUCTIONS
The additional instructions for the use in potentially explosive envi-
ronments 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.
Important safety information.
Read the additional instructions carefully and thoroughly. Study in
particular the chapters entitled Particular safety instructions and
Authorized use.
▶The additional instructions must be read and understood.
The additional instructions describe safety instructions and information
for the use in a potentially explosive environment.
All other descriptions and instructions can be found in the Operating
Instructions of the device for the type 8742 or the type 8746.
The Operating Instructions can be found on the Internet at:
www.buerkert.com
1.1 Definition of terms / abbreviation
In these instructions, the term "device" always refers to the Mass
Flowmeter (MFM) or the Mass Flow Controller (MFC) type 8742 or
type 8746.
In these instructions, the abbreviation "Ex" always refers to
"potentially explosive".
2 SYMBOLS
The following symbols are used in these instructions.
Danger!
Warns of an immediate danger.
▶Failure to observe the warning will result in a fatal or serious injury.
Warning!
Warns of a potentially dangerous situation.
▶Failure to observe the warning may result in a serious or fatal
injury.
Caution!
Warns of a possible danger.
▶Failure to observe this warning may result in a moderate or minor
injury.
note!
Warns of material damage.
Important advice and recommendations.
Refers to information in these instructions or in other
documentation.
▶Designates instructions for risk prevention.
→Designates a procedure which you must carry out.
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3
Intended use
Type 8742 / 8746
3 INTENDED USE
Incorrect use of the Mass Flowmeter (MFM) or the Mass Flow
Controller (MFM) type 8742 or type 8746 can be dangerous to
people, nearby equipment and the environment.
MFM type 8742/8746 is used exclusively to measure the mass
flow of clean dry gases.
MFC type 8742/8746 is used exclusively to control the mass
flow of clean dry gases.
▶The device was designed for the use in explosion group II 3G
Ex nA IIC T* Gc X and in explosion group II 3D Ex tc IIIC T***°C
Dc X (see the information given on the certification sticker and
in chap. 4.2.3 Ambient temperature and temperature class in
the Ex. area).
▶Observe the admissible data, the operating conditions and
conditions of use specified in the contract documents, in the
Operating Instructions and on the name plate of the type 8742
or the type 8746.
▶Use the device only in conjunction with third-party instruments and
components recommended and authorized by Bürkert.
▶Correct transportation, storage and installation, as well as care-
ful use and maintenance are essential for reliable and faultless
operation.
▶Use the device as intended.
3.1 Identification (variable key PX03)
The identification (variable key PX03) is on the name plate of the
device.
Construction code
Seal material
Power supply
Operating medium
Direct current
Conformity marking
Type number
Output signal
Nominal flow rate (Qn)
and units
Serial number
Order code of the device
PX03
8746 GFM 24V ... 1W FKM
0500 Nl/min AIR
büS/CANopen Made in France
S/N 1000 W1ZMG F-67220 Triembach
00273175
ATEX-Identification in the command key of an
ATEX version
Bild 1: Example of a name plate
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Particular safety instructions
Type 8742 / 8746
4 PARTICULAR SAFETY
INSTRUCTIONS
Danger!
Risk of explosion when removing the female connector.
▶After wiring of the device, screw the impact protection cover to
protect the M12 female connector from disconnection without
tools.
▶Before removing the female connector disconnect the power
supply.
Risk of explosion when opening the device.
▶Only open the blind plug if no Ex. atmosphere is present.
▶No Ex. atmosphere must be present when setting the type of field
bus or replacing the configuration memory.
▶Before commissioning tighten the mounting screws to protect the
shock protection cover against removal without tools.
Risk of explosion due to electrostatic discharge.
In the event of a sudden discharge, electrostatically charged
devices or persons present a risk of explosion in the Ex. area.
▶Take appropriate measures to ensure that there can be no elec-
trostatic charging in the Ex. area.
▶Only clean the surface of the devices by gently wiping with a damp
or anti-static cloth.
Danger!
To prevent the risk of explosion, observe not only the safety
instructions in the Operating Instructions for operation in the
Ex. area, but also the following:
▶Observe information on temperature class, ambient temperature,
protection rating, torque and voltage.
▶Do not use devices in areas where there is gas or dust with a
lower ignition temperature than indicated on the label for Ex. area.
▶Installation, operation and maintenance must be performed by
qualified technicians only.
▶Observe the applicable safety regulations (also national safety
regulations) as well as the general rules of technology for construc-
tion and operation.
▶Do not repair the device yourself, but replace it with an equivalent
device.
▶The device must only be repaired by the manufacturer.
▶Do not expose the device to any mechanical and/or thermal loads
which will exceed the limits given in the Operating Instructions.
▶Use only cables which have been approved for the respective
application area and which have been connected according to
the related mounting instructions.
▶The IP protection rating is only guaranteed if a round connector
compliant with IEC 61076-2-101 or the provided M12 sealing
cap is used.
▶In an Ex. atmosphere, the M12 fixed connector must be
equipped with a female connector compliant with
IEC 61076-2-101, overmolded with plastic, or with the provided
M12 sealing cap.
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5
Particular safety instructions
Type 8742 / 8746
Danger!
▶The mechanical strength is only guaranteed if the shock protection
cover is mounted and securely tightened with the fastening screws.
▶Use adequate measures to prevent transient overvoltages greater
than 40% of the rated voltage.
4.1 Particular conditions
Observe the special ambient temperatures for use in Ex. areas. See
chap. 4.2.3
4.2 Instructions for use in Ex. areas
4.2.1 Safety instructions
Use in an Ex. area (Gas) 2 gives rise to:
Danger!
Risk of explosion in Ex. areas due to sudden discharge of
electrostatically charged devices or persons.
▶Take appropriate measures to ensure that there can be no elec-
trostatic charging in the Ex. area.
▶Only clean the surface of the devices by gently wiping with a damp
or anti-static cloth.
4.2.2 Adhesive label for Ex. areas
WARNING: Do not open under
explosive atmosphere
POTENTIAL ELECTROSTATIC
CHARGING HAZARD (SEE MANUAL)
II 3G Ex nA IIC T4 Gc X
II 3D Ex tc IIIC T135°C Dc X
II 3G Ex nA IIC T* Gc X
II 3D Ex tc IIIC T***°C Dc X
Explosion group
Marking for gas explosion protection
Marking for dust explosion protection
Ignition protection category
Gas group
Temperature class
Device protection level
Particular
conditions
WARNING: Do not open under
explosive atmosphere
POTENTIAL ELECTROSTATIC
CHARGING HAZARD (SEE MANUAL)
II 3G Ex nA IIC T* Gc X
II 3D Ex tc IIIC T***°C Dc X
Bild 2: Adhesive label for Ex. areas
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Particular safety instructions
Type 8742 / 8746
4.2.3 Ambient temperature and
temperature class in the Ex. area
Type of the device Ambient temperature range
Type 8742 with valve type 2871 -10 °C...+50 °C
Tab. 1: Ambient temperature range for devices with device
protection level T3 / 160 °C
Type of the device Ambient temperature range
Type 8742 without a valve -10 °C...+50 °C
Type 8742 with valve type 2873 -10 °C...+45 °C
Type 8742 with valve type 2875 -10 °C...+50 °C
Type 8746 without a valve -10 °C...+50 °C
Type 8746 with valve type 2873 -10 °C...+45 °C
Type 8746 with valve type 2875 -10 °C...+50 °C
Type 8746 with valve type 2836 -10 °C...+50 °C
Tab. 2: Ambient temperature range for devices with device
protection level T4 / 135 °C
4.2.4 IP code in Ex. areas
Type 8742 Ex and Type 8746 Ex: IP65
4.2.5 Media in the Ex. area
The use of potentially explosive media can result in an addi-
tional risk of explosion.
4.2.6 Cleaning in the Ex. area
Check that cleaning agent have approval for use in
explosive atmospheres.
4.2.7 Tightening torque of the M12
sealing cap
When screwing on the M12 sealing cap again, apply a
tightening torque 0.4 N•m (0.29 lbf•ft).
4.3 Ex. certification
The Ex. certification is only valid if the Bürkert device is used as des-
cribed in these additional instructions.
If unauthorized changes are made to the device, the Ex. certification
becomes invalid.
English

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