ABB VA Master FAM540 User manual

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ABB MEASUREMENT & ANALYTICS | OPERATING INSTRUCTION
VA Master FAM540
Metal Cone Variable Area Flowmeter
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ABB Limited
Measurement & Analytics
Howard Road, St. Neots
Cambridgeshire, PE19 8EU
UK
Tel: [phone]
Fax: [phone]
Email: [email protected]m
ABB Automation Products GmbH
Measurement & Analytics
Schillerstr. 72
32425 Minden
Germany
Tel: [phone]
Fax: [phone]
abb.com/flow
ABB Inc.
Measurement & Analytics
125 E. County Line Road
Warminster, PA 18974
USA
Tel: [phone]
Fax: [phone]
Device firmware: Version B.20 or
higher
Measurement made easy
OI/FAM540-EN Rev. E 08.2019
—
FAM540 Introduction
Metal cone variable area flowmeter for the
measurement of the flow rate of operating
volume or mass flow units (at constant pressure /
temperature), if a physical mass flow unit has
been selected.
Additional Information
Additional documentation on VA Master FAM540 is
available for download free of charge at
www.abb.com/flow.
Alternatively simply scan this code:
—
We reserve the right to make technical changes or modify the contents of this document
without prior notice. With regard to purchase orders, the agreed particulars shall prevail.
ABB does not accept any responsibility whatsoever for potential errors or possible lack of
information in this document.
We reserve all rights in this document and in the subject matter and illustrations contained
therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole
or in parts – is forbidden without prior written consent of ABB.
© ABB 2019 3KXF154001R4201

2 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
Table of contents
Change from one to two columns
1Safety..........................................................................4
General information and instructions..................................4
Warnings....................................................................................4
Intended use .............................................................................5
Improper use.............................................................................5
Warranty provisions.................................................................5
Notes on data safety ...............................................................6
Manufacturer’s address..........................................................6
2Use in potentially explosive atmospheres in
accordance with ATEX and IECEx ............................ 7
Device overview ........................................................................ 7
Ex marking............................................................................8
Installation instructions........................................................10
Protection against electrostatic discharges................10
Sensor insulation...............................................................10
Opening and closing the transmitter housing ............ 11
Cable entries ...................................................................... 11
Type of protection Ex d - flameproof (enclosure)....... 12
Electrical connections ...................................................... 12
Safety specifications ATEX / IECEx ....................................14
Special conditions for type of protection ‘Ex td’ (dust
explosion protection) .......................................................14
Table 1: Analog indicator with transmitter, with /
without LCD indicator ......................................................14
Table 2: Analog indicator with alarm signaling unit....16
Table 3: Analoganzeiger mit Grenzwertgeber.................. 17
Table 4: Analoganzeiger mit Grenzsignalgeber ..............18
Table 5: Analoganzeiger ohne Grenzsignalgeber ...........19
Operating instructions..........................................................19
Protection against electrostatic discharges................19
Changing the type of protection....................................20
3Use in potentially explosive atmospheres in
accordance with FM and cCSAus ........................... 21
Device overview ...................................................................... 21
Ex marking..........................................................................22
Installation instructions........................................................23
Sensor insulation...............................................................23
Opening and closing the transmitter housing ............23
Cable entries ......................................................................23
Type of protection XP ‘Explosion proof’ .......................23
Electrical connections ......................................................24
Safety specifications FM, cCSAus .......................................27
Operating instructions..........................................................32
Protection against electrostatic discharges................32
Changing the type of protection....................................32
4Design and function ................................................ 33
General .....................................................................................33
Device overview ......................................................................34
5Product identification ............................................ 35
Name plate ..............................................................................35
Factory tag ..............................................................................36
6Transport and storage ............................................37
Inspection ............................................................................... 37
Transport ................................................................................ 37
Storage .................................................................................... 37
Returning devices .................................................................. 37
7Installation............................................................... 38
Installation conditions.......................................................... 38
Sensor insulation .............................................................. 38
Operating conditions............................................................ 39
Temperature Data ............................................................ 39
Pressure loss...................................................................... 39
Prevention of compression oscillations when
measuring gases............................................................... 39
Pressure shocks ................................................................ 39
Solids content in the measuring medium ....................40
Float designs ..........................................................................40
Mounting.................................................................................40
Installation of the flowmeter.......................................... 41
Material loads for process connections ....................... 41
Electrical connections........................................................... 42
Analog indicator with alarm signaling unit.................. 42
Switching amplifier .......................................................... 43
Analog indicator with transmitter................................. 43
HART output ......................................................................44
8Commissioning ....................................................... 45
General Notes......................................................................... 45
Switching on the power supply........................................... 45
Inspection after power-up of the power supply ......... 45
Adjusting the alarm signalling unit ....................................46
Configuring the programmable output ............................46
Operating instructions ......................................................... 47
9Operation................................................................. 47
Menu navigation .................................................................... 47
User levels ..........................................................................48
Parameterization of the device...........................................49
Parameter Overview.........................................................49
Description of menus and parameters.............................. 54
‘Prog.Output’ Menu ..........................................................54
‘Operating mode’ Menu ................................................... 54
‘Standard density’ and ‘Operating density’ Menu ......54
‘Low flow cut off’ Menu....................................................54
‘Current output’ Menu...................................................... 55
‘Function test’ Menu......................................................... 55
‘Totalizer“ und „Overflow’ Menu..................................... 56
‘Damping’ Menu ................................................................ 56
10Diagnosis / error messages .................................. 56
Calling up the error description .......................................... 56
Error messages ...................................................................... 57

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 3
11Maintenance.............................................................58
Safety instructions.................................................................58
Cleaning ...................................................................................58
Sensor ......................................................................................58
12Repair........................................................................59
Safety instructions.................................................................59
Spare parts..............................................................................59
Replacing the analog indicator............................................59
Installation / disassembly of the analog indicator.... 60
Returning devices.................................................................. 60
13Dismounting and disposal...................................... 61
Dismounting ...........................................................................61
Disposal ...................................................................................61
14Specification ............................................................62
15Additional documents ............................................62
16Appendix...................................................................63
Intrinsic Safety Control Drawing SDM-10-A0253..............63
Return form ............................................................................ 64

4 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
1Safety
hange from one to two columns
General information and instructions
These instructions are an important part of the product and
must be retained for future reference.
Installation, commissioning, and maintenance of the product
may only be performed by trained specialist personnel who have
been authorized by the plant operator accordingly. The specialist
personnel must have read and understood the manual and must
comply with its instructions.
For additional information or if specific problems occur that are
not discussed in these instructions, contact the manufacturer.
The content of these instructions is neither part of nor an
amendment to any previous or existing agreement, promise or
legal relationship.
Modifications and repairs to the product may only be performed
if expressly permitted by these instructions.
Information and symbols on the product must be observed.
These may not be removed and must be fully legible at all times.
The operating company must strictly observe the applicable
national regulations relating to the installation, function testing,
repair and maintenance of electrical products.
Warnings
The warnings in these instructions are structured as follows:
DANGER
The signal word ‘DANGER’ indicates an imminent danger.
Failure to observe this information will result in death or
severe injury.
WARNING
The signal word ‘WARNING’ indicates an imminent danger.
Failure to observe this information may result in death or
severe injury.
CAUTION
The signal word ‘CAUTION’ indicates an imminent danger.
Failure to observe this information may result in minor or
moderate injury.
NOTICE
The signal word
‘
NOTIC
E
’
indicates possible material damage.
Note
‘Note’ indicates useful or important information about the
product.

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 5
Intended use
This device is intended for the following uses:
• To transmit fluid or gaseous measuring media.
• To measure volume flow rate in operating units, standard
units or mass flow units.
The device has been designed for use exclusively within the
technical limit values indicated on the identification plate and in
the data sheets.
When using measuring media, the following points must be
observed:
• Measuring media may only be used if, based on the state
of the art or the operating experience of the user, it can
be assured that the chemical and physical properties
necessary for operational security of the materials of the
wetted parts of the temperature sensor will not be
adversely affected during the operating time.
• Media containing chloride in particular can cause
corrosion damage to stainless steels which, although not
visible externally, can damage wetted parts beyond repair
and lead to the measuring medium escaping. It is the
operator's responsibility to check the suitability of these
materials for the respective application.
• Measuring media with unknown properties or abrasive
measuring media may only be used if the operator is able
to perform regular and suitable tests to ensure the safe
condition of the device
The operator bears sole responsibility for the use of the devices
in relation to suitability, intended use and corrosion resistance
of the materials in relation to the measuring medium.
The manufacturer is not liable for damage arising from improper
or non-intended use.
Repairs, alterations, and enhancements, or the installation of
replacement parts, are only permissible insofar as these are
described in this manual. Approval by ABB Automation Products
GmbH must be sought for any activities beyond this scope.
Repairs performed by ABB-authorized specialist shops are
excluded from this.
Improper use
The following are considered to be instances of especially
improper use of the device:
• Operation as a flexible compensating adapter in piping,
for example for compensating pipe offsets, pipe
vibrations, pipe expansions, etc.
• For use as a climbing aid, for example for mounting
purposes.
• For use as a bracket for external loads, for example as a
support for piping, etc.
• Material application, for example by painting over the
housing, name plate or welding/soldering on parts.
• Material removal, for example by spot drilling the
housing.
Warranty provisions
Using the device in a manner that does not fall within the scope
of its intended use, disregarding this manual, using
underqualified personnel, or making unauthorized alterations
releases the manufacturer from liability for any resulting
damage. This renders the manufacturer's warranty null and void.

6 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 1 Safety
Notes on data safety
This product is designed to be connected to and to
communicate information and data via a network interface.
It is operator’s sole responsibility to provide and continuously
ensure a secure connection between the product and your
network or any other network (as the case may be).
Operator shall establish and maintain any appropriate measures
(such as but not limited to the installation of firewalls,
application of authentication measures, encryption of data,
installation of anti-virus programs, etc.) to protect the product,
the network, its system and the interface against any kind of
security breaches, unauthorized access, interference, intrusion,
leakage and / or theft of data or information.
ABB Automation Products GmbH and its affiliates are not liable
for damages and / or losses related to such security breaches,
any unauthorized access, interference, intrusion, leakage and /
or theft of data or information.
Manufacturer’s address
ABB Automation Products GmbH
Measurement & Analytics
Schillerstr. 72
32425 Minden
Germany
Tel: [phone]
Fax: [phone]
Customer service center
Tel: [phone]
Email: [email protected]

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 7
Change from tw o to one column
2Use in potentially explosive atmospheres in accordance with ATEX and IECEx
Note
Further information on the Ex-Approval of devices can be found in the type examination certificates or the relevant certificates at
www.abb.com/flow .
Device overview
The devices are designed for maximum versatility. This is achieved through a combination of several types of protection within each
device. All devices are suitable for use in potentially explosive atmospheres with combustible dust. For detailed installation
instructions and terminal assignments, refer to Electrical connections on page 12.
Zone 1 Zone 2 Standard / No explosion protection Order code*
Potential equalization
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.

8 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
… Device overview
Ex marking
Note
• Depending on the design, a specific marking in accordance with ATEX or IECEx applies.
• ABB reserves the right to modify the Ex-marking. Refer to the name plate for the exact marking.
Model FAM54xAx (analog indicator without alarm signaling unit)
Marking Type of protection Order code* Limit value table
ATEX II 1/2 G Ex h T6 ... T1 Gb Constructional safety A4, A9, B1 Table 5 on page 19
II 2 D Ex h T85°C ... Tmedium Db Constructional safety
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
Model FAM54xB/C/Dx (analog indicator with alarm signaling unit)
Marking Type of protection Order code* Limit value table
ATEX II 1/2 G Ex h ia IIC T6 ... T1 Ga/Gb Intrinsically Safe A4 Table 2 on page 16
II 1/3 G Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials Table 4 on page 18
II 2D Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 2 on page 16,
Table 4 on page 18
IECEx Ex h ia IIC T6 ... T1 Ga/Gb Intrinsically Safe Table 2 on page 16
Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials Table 4 on page 18
Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 2 on page 16,
Table 4 on page 18
ATEX II 1/2 G Ex db h IIC T6 ... T1 Ga/Gb Flameproof / Explosion-Proof A9 Table 3 on page 17
II 1/2 G Ex h ia IIC T6 ... T1 Ga/Gb Intrinsically Safe Table 2 on page 16
II 1/3 G Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials Table 4 on page 18
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 2 on page 16,
Table 3 on page 17,
Table 4 on page 18
IECEx Ex db h IIC T6 ... T1 Ga/Gb Flameproof / Explosion-Proof Table 3 on page 17
Ex h ia IIC T6 ... T1 Ga/Gb Intrinsically Safe Table 2 on page 16
Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials Table 4 on page 18
Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 2 on page 16,
Table 3 on page 17,
Table 4 on page 18
ATEX II 1/3 G Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials B1 Table 4 on page 18
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 4 on page 18
IECEx Ex ec h IIC T6 ... T1 Ga/Gc Non-sparking materials Table 4 on page 18
Ex h tb IIIC T85°C ... Tmedium Db Dust-explosion protection Table 4 on page 18
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 9
Model FAM54xE/Fx (analog indicator with transmitter and with or without LCD indicator)
Marking Type of protection Order code* Limit value table
ATEX II 1/2 G Ex h ia IIC T4 ... T1 Ga/Gb Intrinsically Safe A4 Table 1 on page 14
II 1/3 G Ex ec h ic T6 ... T1Ga/Gc Non-sparking materials
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
IECEx Ex h ia IIC T4 ... T1 Ga/Gb Intrinsically Safe
Ex ec h ic IIC T6 ... T1Ga/Gc Non-sparking materials
Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
ATEX II 1/2 G Ex db h IIC T6 ... T1 Ga/Gb Flameproof / Explosion-Proof A9 Table 1 on page 14
II 1/2 G Ex h ia IIC T4 ... T1 Ga/Gb Intrinsically Safe
II 1/3 G Ex ec h ic IIC T6 ... T1 Ga/Gc Non-sparking materials
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
IECEx Ex db h IIC T6 ... T1 Ga/Gb Flameproof / Explosion-Proof
Ex h ia IIC T4 ... T1 Ga/Gb Intrinsically Safe
Ex ec h ic IIC T6 ... T1 Ga/Gc Non-sparking materials
Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
ATEX II 1/3 G Ex ec h ic IIC T6 ... T1 Ga/Gc Non-sparking materials B1 Table 4 on page 18
II 2 D Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
IECEx Ex ec h ic IIC T6 ... T1 Ga/Gc Non-sparking materials
Ex h tb IIIC T85°C ... Tmedium Db Dust explosion protection
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
Change from one to two columns

10 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
Installation instructions
The installation, commissioning, maintenance and repair of
devices in areas with explosion hazard must only be carried out
by appropriately trained personnel.
The safety instructions for electrical apparatus in potentially
explosive areas must be complied with, in accordance with
Directive 2014/34/EU (ATEX) and IEC60079-14 (Installation of
electrical equipment in potentially explosive areas).
To ensure safe operation, the requirements of EU Directive
ATEX 118a (minimum requirements concerning the protection of
workers) must be met.
When using in potentially explosive atmospheres, please note:
• Observe the information in Installation conditions on
page 38 when installing the device.
• The maximum ambient temperature for use with
combustible dusts (category II 2D) is Tamb = +60 °C.
• During commissioning, refer to EN 60079-0 regarding use in
areas with combustible dust.
• For explosion-protected apparatus with PTFE liner, a
minimum medium conductivity of > 10-8 S/m must be
guaranteed.
• If Zone 0 is present in the meter tube, the devices may only
be installed in an environment that provides sufficient
ventilation to guarantee Zone 1.
• Variable area flowmeters used in accordance with maximum
electric values for a category 3 device (zone 2) can also be
retrofitted without modification as category 2 devices in
zone 1 (see Changing the type of protection on page 20).
Protection against electrostatic discharges
DANGER
Risk of explosion!
The painted surface of the device can store electrostatic
charges.
As a result, the housing can form an ignition source due to
electrostatic discharges in the following conditions:
• The device is operated in environments with a relative
humidity of ≤30 %.
• The painted surface of the device is thereby relatively free
from impurities such as dirt, dust or oil.
• Instructions on avoiding ignition in potentially explosive
environments due to electrostatic discharges in
accordance with PD CLC/TR 60079-32-1 and IEC TS 60079-
32-1 must be complied with!
Instructions on cleaning
The painted surface of the device must be cleaned only using a
moist cloth.
Sensor insulation
The device may be insulated. The maximum permissible
thickness of the insulation corresponds to the flange diameter.
Refer to Sensor insulation on page 23.

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 11
Opening and closing the transmitter housing
DANGER
Danger of explosion if the device is operated with the
transmitter housing open!
Before opening the transmitter housing, bear in mind the
following:
• A valid fire permit must be present.
• Make sure that there is no explosion hazard.
• Switch off the power supply and wait for t > 2 minutes
before opening.
WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
• Before opening the housing, switch off the power supply.
Before opening the housing cover, remove the cover protector,
and reattach it after closing the housing cover.
Only original spare parts must be used to seal the housing.
Note
Spare parts can be ordered from ABB Service.
www.abb.com/contacts
Cable entries
The devices are connected electrically using a cable gland or
alternatively by using conduit systems with pipe fittings.
For this purpose, the devices are delivered with cable glands or
alternatively with ½“ NPT connection threads for pipe fittings.
ATEX / IECEx-approved flameproof cable glands made from
metal are supplied with device versions that have type of
protection Ex-d ‘Flameproof enclosure’ (order code A9).
ATEX / IECEx-approved cable glands made from plastic are
supplied with device versions that have the Ex-ia and Ex-nA type
of protection.
The various connection possibilities depend on the device-
specific configuration of the explosion protection and the
‘Housing material / cable connection’ option in accordance with
the ordering information in data sheet DS/FAM540.
To ensure proper routing of cables, the following cable
diameters are required:
• Ex-d design: 7.2 to 11.7 mm (0.28 to 0.46 in)
• Other designs: 5.0 to 9.0 mm (0.20 to 0.35 in)
Devices with ½” NPT threads and ATEX and IECEx approvals can
be ordered and operated without cable glands (with the
exception of ‘Ex d’). In this case, the operator is responsible for
properly installing pipe fittings in accordance with national
regulations (e.g. NEC, CEC, ATEX137, IEC60079-14, etc.).

12 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
… Installation instructions
Type of protection Ex d - flameproof (enclosure)
Model FAM540, order code A9
The flowmeter is electrically connected via the ATEX / IECEx-
approved cable gland with Ex-d type of protection (see Figure 1)
located on the device.
Alternatively, the flowmeter can be connected using conduit
systems. In Ex-d type of protection, the connection must be
made using an ATEX / IECEx approved pipe fitting with a flame
barrier. The mechanical ignition barrier must be installed directly
on the housing.
The preinstalled cable gland must be removed before connecting
a pipe fitting. The M25 × 1.5 / ½ in NPT adapter remains
unchanged on the device.
Note
Pipe fittings with flame barriers are not included in the scope of
supply.
Only ATEX / IECEx approved pipe fittings with a flame barrier
may be used with Ex-d type of protection. The use of cable and
wire entries, pipe fittings or sealing plugs without an Ex-d type
examination certificate is prohibited.
Unused openings must be closed with Ex-d-approved sealing
plugs.
1 Strain relief
2 Adapter M25 × 1.5 / ½ in NPT
3 Gasket
4 Sleeve
5 Union nut
Figure 1: Connection using a flameproof cable gland
The outside diameter of the unshielded connection cable must
be in a range from 7.2 to 11.7 mm (0.3 to 0.5 in). After installing
the cable in the fitting, tighten the union nut using a torque of
3.25 Nm (2.40 lb/ft). Use additional strain relief in the housing to
secure the connection cable.
Electrical connections
Potentially explosive atmosphere Non-hazardous area
1Namur switching amplifier
2Safety barrier
3Potential equalization
Figure 2: ATEX / IECEx electrical connection
Terminal Function
31 / 32 Power supply / current output / HART output
41 / 42 Programmable binary output
Alarm signaling unit (min.)
51 / 52 Alarm signaling unit (max.)

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 13
Figure 3: Terminals 31 / 32, power supply / load
UVPower supply
RBMaximum permissible load in the power supply (z. B. indicator)
The minimum voltage UV= 0 V is based on a load of 0 Ω.
Signal cable
The Ex calculations are based on temperatures of 80 °C (176 °F)
at the cable input. For this reason, cables with a specification of
80 °C (176 °F) must be used.
For cables limited to 70 °C (158 °F), a maximum ambient
temperature of Tamb = 60 °C (140 °F) applies.
The resulting new maximum measuring medium temperatures
are determined as follows:
• Calculate a new ambient temperature:
Tamb new = Tamb + 10 °C (18 °F).
• Use the calculated ambient temperature Tamb new to
determine the new associated permissible measuring
medium temperatures in the tables.
• Please use the limit value tables with the original ambient
temperature Tamb to determine the relevant temperature
class. See Safety specifications ATEX / IECEx on page 14,
Tables 1 to 5.
Example:
• Tamb = 50 °C (122 °F) becomes Tamb new = 60 °C (140 °F).
• Determine the measuring medium temperature Tamb = 60
°C (140 °F).
• Determine the temperature class for Tamb = 50 °C (122 °F).
Earthing
1Ground terminal
2Potential equalization in accordance with EN 60079-0
Figure 4: Grounding
The FAM540 housing must be correctly earthed in order to
ensure proper function and safe operation.
Copper wires with a minimum cross-section of 6 mm2(AWG 10)
must be used to connect to the potential equalization.
Note
The operator must make sure that when connecting the
protective ground (PE), there are no potential differences
between protective ground (PE) and potential equalization, even
in the event of a fault.
Change from tw o to one column

14 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
Safety specifications ATEX / IECEx
Special conditions for type of protection ‘Ex td’ (dust explosion protection)
Model FAM54xB/C/D/E/Fx
The following differing temperature data applies to usage in areas with combustible dust.
Order code Ambient temperature Tamb Maximum permissible measuring medium temperature Tmedium
A4, A9, B1 −50 °C to +60 °C 250 °C
−50 °C to +40 °C 340 °C
−50 °C to +20 °C 430 °C
Table 1: Analog indicator with transmitter, with / without LCD indicator
Model FAM54xE/Fx
Type of protection: flameproof enclosure, intrinsic safety, non-sparking equipment, dust explosion protection.
Order
code*
Marking Terminals Electrical values Tamb
−20 °C to (−50 °C to )
Temp. class Tmedium
Maximum
Insulation
A4, A9 ATEX:
II 1/2 G Ex h ia IIC T4 ... T1 Ga/Gb
II 1/3 G Ex ec h ic T6 ... T1Ga/Gc
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex h ia IIC T4 ... T1 Ga/Gb
Ex ec h ic IIC T6 ... T1Ga/Gc
Ex h tb IIIC T85°C ... Tmedium Db
31 / 32** Ui= 30 V
Ii= 110 mA
Pi= 770 mW
Ci= 5.3 nF
Li= 266 µH
40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
41 / 42** Ui= 30 V
Ii= 30 mA
Pi= 115 mW
Ci= 4.8 nF
Li= 133 µH
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 125 °C yes
A9 ATEX:
II 1/2 G Ex db h IIC T6 ... T1 Ga/Gb
II 1/2 G Ex h ia IIC T4 ... T1 Ga/Gb
II 1/3 G Ex ec h ic IIC T6 ... T1 Ga/Gc
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex db h IIC T6 ... T1 Ga/Gb
Ex h ia IIC T4 ... T1 Ga/Gb
Ex ec h ic IIC T6 ... T1 Ga/Gc
Ex h tb IIIC T85°C ... Tmedium Db
31 / 32*** Umax = 46 V 40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
41 / 42*** Umax = 30 V
Imax = 30 mA
Pmax = 115 mW
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
60 °C T4 130 °C yes
60 °C T5 95 °C yes
60 °C T6 80 °C yes

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 15
A4, A9, B1 ATEX:
II 1/3 G Ex ec h ic IIC T6 ... T1 Ga/Gc
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex ec h ic IIC T6 ... T1 Ga/Gc
Ex h tb IIIC T85°C ... Tmedium Db
31 / 32*** Umax = 46 V 40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
41 / 42*** Umax = 30 V
Imax = 30 mA
Pmax = 115 mW
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
** for connection to an intrinsically safe circuit
*** for connection to a non-intrinsically safe circuit If the device is to be operated subsequently with type of protection "intrinsically safe", then Umax = 60 V may
not be exceeded.

16 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
… Safety specifications ATEX / IECEx
Table 2: Analog indicator with alarm signaling unit
Model FAM54xB/C/Dx
Type of protection: intrinsic safety, dust explosion protection.
Order
code*
Marking Terminals Electrical values Tamb
−20 °C to (−50 °C to )
Temp. class Tmedium
Maximum
Insulation
A4, A9 ATEX:
II 1/2 G Ex h ia IIC T6 ... T1 Ga/Gb
II 2D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex h ia IIC T6 ... T1 Ga/Gb
Ex h tb IIIC T85°C ... Tmedium Db
41 / 42**
51 / 52**
Ui= 16 V
Ii= 25 mA
Pi= 64 mW
Ci= 50 nF
Li= 250 µH
40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
70 °C T5 95 °C yes
60 °C T6 80 °C yes
41 / 42**
51 / 52**
Ui= 16 V
Ii= 52 mA
Pi= 169 mW
Ci= 50 nF
Li= 250 µH
40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
60 °C T5 60 °C yes
50 °C T5 90 °C No
40 °C T6 60 °C yes
41 / 42**
51 / 52**
Ui= 16 V
Ii= 76 mA
Pi= 242 mW
Ci= 50 nF
Li= 250 µH
40 °C T1 440 °C No
40 °C T1 310 °C yes
40 °C T2 190 °C yes
50 °C T2 340 °C No
50 °C T2 230 °C yes
60 °C T2 230°C No
60 °C T3 160 °C yes
70 °C T4 120 °C No
70 °C T4 100 °C yes
40 °C T5 60 °C yes
30 °C T6 30 °C yes
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
** for connection to an intrinsically safe circuit

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 17
Table 3: Analoganzeiger mit Grenzwertgeber
Model FAM54xB/C/Dx
Type of protection: flameproof enclosure, dust explosion protection.
Order
code*
Marking Terminals Electrical values Tamb
−20 °C to (−50 °C to )
Temp. class Tmedium
Maximum
Insulation
A9 ATEX:
II 1/2 G Ex db h IIC T6 ... T1 Ga/Gb
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex db h IIC T6 ... T1 Ga/Gb
Ex h tb IIIC T85°C ... Tmedium Db
41 / 42**
51 / 52**
Umax = 16 V
Imax = 25 mA
Pmax = 64 mW
40 °C T1 440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
70 °C T5 95 °C yes
60 °C T6 80 °C yes
No
41 / 42**
51 / 52**
Umax = 16 V
Imax = 52 mA
Pmax = 169 mW
40 °C T1 440 °C
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
60 °C T5 60 °C yes
50 °C T5 90 °C No
40 °C T6 60 °C yes
41 / 42**
51 / 52**
Umax = 16 V
Imax = 76 mA
Pmax = 242 mW
40 °C T1 440 °C No
40 °C T1 310 °C yes
40 °C T2 190 °C yes
50 °C T2 340 °C No
50 °C T2 230 °C yes
60 °C T2 230°C No
60 °C T3 160 °C yes
70 °C T4 120 °C No
70 °C T4 100 °C yes
40 °C T5 60 °C yes
30 °C T6 30 °C yes
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
** for connection to a non-intrinsically safe circuit If the device is to be operated subsequently with type of protection "intrinsically safe", then Umax = 60 V may
not be exceeded.

18 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
… Safety specifications ATEX / IECEx
Table 4: Analoganzeiger mit Grenzsignalgeber
Model FAM54xB/C/Dx
Type of protection: non-sparking materials, dust explosion protection.
Order
code*
Marking Terminals Electrical values Tamb
−20 °C to (−50 °C to )
Temp. class
Tmedium
Maximum
Insulation
A4, A9, B1 ATEX:
II 1/3 G Ex ec h IIC T6 ... T1 Ga/Gc
II 2D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex ec h IIC T6 ... T1 Ga/Gc
Ex h tb IIIC T85°C ... Tmedium Db
41 / 42**
51 / 52**
Umax = 16 V
Imax = 25 mA
Pmax = 64 mW
40 °C T1
440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
70 °C T5 95 °C yes
60 °C T6 80 °C yes
41 / 42**
51 / 52**
Umax = 16 V
Imax = 52 mA
Pmax = 169 mW
40 °C T1
440 °C No
40 °C T1 375 °C yes
40 °C T1 260 °C yes
50 °C T1 300 °C yes
50 °C T2 290 °C yes
50 °C T2 220°C yes
60 °C T2 320 °C No
60 °C T2 230 °C yes
60 °C T3 170 °C yes
70 °C T3 195 °C No
70 °C T3 150 °C yes
70 °C T4 130 °C yes
60 °C T5 60 °C yes
50 °C T5 90 °C No
40 °C T6 60 °C yes
A4, A9, B1 ATEX:
II 1/3 G Ex ec h IIC T6 ... T1 Ga/Gc
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex ec h IIC T6 ... T1 Ga/Gc
Ex h tb IIIC T85°C ... Tmedium Db
41 / 42**
51 / 52**
Umax= 16 V
Imax = 76 mA
Pmax = 242 mW
40 °C T1 440 °C No
40 °C T1 310 °C yes
40 °C T2 190 °C yes
50 °C T2 340 °C No
50 °C T2 230 °C yes
60 °C T2 230°C No
60 °C T3 160 °C yes
70 °C T4 120 °C No
70 °C T4 100 °C yes
40 °C T5 60 °C yes
30 °C T6 30 °C yes
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
** for connection to a non-intrinsically safe circuit If the device is to be operated subsequently with type of protection "intrinsically safe", then Umax = 60 V may
not be exceeded.

VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E 19
Table 5: Analoganzeiger ohne Grenzsignalgeber
Model FAM54xAx
Type of protection: constructional safety, dust explosion protection
Order
code*
Marking Terminals Electrical values Tamb
−20 °C to (−50 °C to )
Temp. class Tmedium
Maximum
Insulation
A4, A9, B1 ATEX:
II 1/2 G Ex h T6 ... T1 Gb
II 2 D Ex h T85°C ... Tmedium Db
II 2 D Ex h tb IIIC T85°C ... Tmedium Db
IECEx:
Ex h tb IIIC T85°C ... Tmedium Db
n.a. n. a 70 °C T1 440 °C yes
70 °C T2 290 °C yes
70 °C T3 190 °C yes
70 °C T4 130 °C yes
70 °C T5 95 °C yes
70 °C T6 80°C yes
* Order code ‘Explosion protection and approvals’ (versions 9, 10); refer to Ordering information in the data sheet on page 62.
Change from one to two columns
Operating instructions
Protection against electrostatic discharges
DANGER
Risk of explosion!
The painted surface of the device can store electrostatic
charges.
As a result, the housing can form an ignition source due to
electrostatic discharges in the following conditions:
• The device is operated in environments with a relative
humidity of ≤30 %.
• The painted surface of the device is thereby relatively free
from impurities such as dirt, dust or oil.
• Instructions on avoiding ignition in potentially explosive
environments due to electrostatic discharges in
accordance with PD CLC/TR 60079-32-1 and IEC TS 60079-
32-1 must be complied with!
Instructions on cleaning
The painted surface of the device must be cleaned only using a
moist cloth.

20 VA Master FAM540 METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
Change from tw o to one column
… 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
… Operating instructions
Changing the type of protection
Depending on the model, the device may be designed to be installed in one of the applications listed. If you plan to use a device that
was installed in one type of protection rating in a different type of protection rating, some measures must be taken before
connecting voltage to the device.
Measures for devices with alarm signaling unit FAM540-B/C/D
Original installation New installation Necessary test steps
XP or Ex d
UM= 60 V
IS or Ex ia* • 500 V AC / 1min test between terminals 51 / 52 and 41 / 42 and terminals 51 / 52 / 41 / 42 and
the housing.
• Visual inspection: no explosion, no damage.
NI or Ex ec • 500 V AC / 1min test between terminals 51 / 52 and 41 / 42 and terminals 51 / 52 / 41 / 42 and
the housing.
• Visual inspection: no explosion, no damage.
IS or Ex ia XP or Ex d • Visual inspection: no damage to threads (cover, surface, ½” NPT cable input), cable gland,
glass, housing, locking device for cover, suited cable, etc.
NI or Ex ec No special measures required.
NI or Ex ec
UM= 60 V
IS or Ex ia* • 500 V AC / 1min test between terminals 51 / 52 and 41 / 42 and terminals 51 / 52 / 41 / 42 and
the housing.
• Visual inspection: no explosion, no damage.
XP or Ex d • Visual inspection: no damage to threads (cover, surface, ½” NPT cable input), cable gland,
glass, housing, locking device for cover, suited cable, etc.
* Possible only if the maximum signal levels of UM≤60 V (e.g., PELV or SELV circuits) were not previously up-scaled.
Measures for devices with transmitter with or without LCD display FAM540-E/F
Original installation New installation Necessary test steps
XP or Ex d
UM= 60 V
IS or Ex ia* • 500 V AC / 1min test between terminals 31 / 32 and 41 / 42 and terminals 31 / 32 / 41 / 42 and
the housing.
• Visual inspection: No damage, especially to electronic boards.
• Visual inspection: no explosion, no damage.
NI or Ex ec • 500 V AC / 1min test between terminals 31 / 32 and 41 / 42 and terminals 31 / 32 / 41 / 42 and
the housing.
• Visual inspection: No damage, especially to electronic boards.
• Visual inspection: no explosion, no damage.
IS or Ex ia XP or Ex d • Visual inspection: no damage to threads (cover, surface, ½” NPT cable input), cable gland,
glass, housing, locking device for cover, suited cable, etc.
NI or Ex ec
No special measures required.
NI or Ex ec
UM= 60 V
IS or Ex ia* • 500 V AC / 1min test between terminals 31 / 32 and 41 / 42 and terminals 31 / 32 / 41 / 42 and
the housing.
• Visual inspection: No damage, especially to electronic boards.
XP or Ex d • Visual inspection: no damage to threads (cover, surface, ½” NPT cable input), cable gland,
glass, housing, locking device for cover, suited cable, etc.
* Possible only if the maximum signal levels of UM≤60 V (e.g., PELV or SELV circuits) were not previously up-scaled.
Change from one to two columns