Siemens SITRANS F Operating instructions

Additional Operating Instructions
SITRANS FX330 Ex-nA
Vortex flowmeters
08/2017Edition
SITRANS F
www.siemens.com/flow

CONTENTS
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SITRANS FX330
1 Safety instructions 3
1.1 General notes ................................................................................................................... 3
1.2 EU conformity ................................................................................................................... 3
1.3 Approval according to the IECEx scheme ........................................................................ 3
1.4 Safety instructions............................................................................................................ 4
2 Device description 5
2.1 Device description ............................................................................................................ 5
2.2 Marking............................................................................................................................. 5
2.3 Flammable products ........................................................................................................ 7
2.4 Equipment category .........................................................................................................7
2.5 Protection types................................................................................................................ 8
2.6 Ambient temperature / temperature classes.................................................................. 8
2.7 Electrical data................................................................................................................. 14
3 Installation 15
3.1 Mounting ......................................................................................................................... 15
4 Electrical connections 16
4.1 General notes ................................................................................................................. 16
4.2 Power supply .................................................................................................................. 16
4.3 Inputs / Outputs .............................................................................................................. 17
4.4 Grounding and equipotential bonding............................................................................ 18
4.5 Flow sensor circuits (remote version only) ................................................................... 19
5 Operation 20
5.1 Start-up........................................................................................................................... 20
5.2 Operation ........................................................................................................................ 20
5.3 Electrostatic charge .......................................................................................................20
6 Service 21
6.1 Maintenance ................................................................................................................... 21
6.2 Dismantling .................................................................................................................... 21
7 Notes 23

SAFETY INSTRUCTIONS 1
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1.1 General notes
These additional instructions apply to explosion-protected versions of vortex flowmeters in
protection type non-sparking "nA", equipment category II 3 G and EPL Gc. They complete the
standard documentation for the non-explosion protection versions.
The information given in this instruction contains only the data relevant to explosion protection
of category 3. The technical details given in the standard documentation for the non-explosion
protected versions apply unchanged unless excluded or superseded by these instructions.
1.2 EU conformity
The manufacturer declares with the EU declaration of conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas.
Conformity with harmonised standards was checked by a notified body in accordance with
EN 60079-0:2012 + A11, EN 60079-11:2012 and EN 60079-15:2010.
The EU declaration of conformity for the equipment category II 3 G is based on the type
examination certificate of the KIWA:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed the type examination certificate can be downloaded from the manufacturer's website.
1.3 Approval according to the IECEx scheme
Conformity of the vortex flowmeter for use in hazardous areas with gas was tested in accordance
with the IECEx Certification Scheme for Explosive Atmospheres acc. to IEC 60079-0: 2011 cor.
2013, IEC 60079-11: 2011 and IEC 60079-15: 2010. The number of the IEC certificate is:
The "X" after the certificate number refers to special conditions for safe use of the device, which
have been listed in these instructions.
If needed, the IEC certificate can be downloaded from the manufacturer's website.
KIWA 17 ATEX 0016X
KIWA 17 ATEX 0016XKIWA 17 ATEX 0016X
KIWA 17 ATEX 0016X
IECEx KIWA 16.0022X
IECEx KIWA 16.0022XIECEx KIWA 16.0022X
IECEx KIWA 16.0022X

1 SAFETY INSTRUCTIONS
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1.4 Safety instructions
If these instructions are not followed, there is a risk of explosion.
Assembly, installation, start-up and maintenance may only be performed by personnel trained in
explosion protection!
CAUTION!
Operating conditions and place of installation may require compliance with additional standards,
directives or laws. The responsibility for compliance rests solely with the operator or his agent.

DEVICE DESCRIPTION 2
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2.1 Device description
Vortex flowmeters measure and display the flow of flammable and non-flammable gases and
liquids. The signal converter includes either a 4...20 mA signal output with optional HART
®
communication or a bus connection. There are bus connections available according to the FISCO
model for connecting to the Foundation Fieldbus or Profibus PA. Signal converters with signal
output have a remote binary output and a remote current input.
The SITRANS FX330 remote version consists of the SITRANS FXS300 flow sensor and the
SITRANS FXT030 signal converter.
2.2 Marking
The marking of the devices in accordance with the description code is shown on the nameplates
below. On both the compact devices and the remote versions, the main plate is located on the
signal converter housing. On the remote versions there is an additional marking on the flow
sensor.
Compact devices with two signal converters for dual measurement (Dual Version) are each
marked with a nameplate, which is attached to each of the signal converter housings. The details
relevant to explosion protection are identical on both nameplates.
Figure 2-1: Example of nameplate for compact version
1 Device version SITRANS FX330
2 Production order number
3 Serial number
4 Year of manufacture
5 Marking acc. to KIWA 17 ATEX 0016 X or IECEx KIWA 16.0022X
6 Permissible ambient temperature range
7 Electrical connection data
8 Safety instructions, disposal and data matrix
9 Internet address of the manufacturer

2 DEVICE DESCRIPTION
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Figure 2-2: Example of nameplate for remote version
1 Device version SITRANS FXT030 / SITRANS FXS300
2 Production order number
3 Serial number
4 Year of manufacture
5 Marking acc. to KIWA 17 ATEX 0016 X or IECEx KIWA 16.0022X
6 Permissible ambient temperature range
7 Electrical connection data
8 Safety instructions, disposal and data matrix
9 Internet address of the manufacturer

DEVICE DESCRIPTION 2
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2.3 Flammable products
Atmospheric conditions
An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under
atmospheric conditions.
It is defined by the following values T
atm
= -20...+60°C / -4...+140°F and P
atm
= 0.8...1.1 bar /
11.6...15.9 psi.
Outside of this range, for most mixtures no key figures are available for the ignition behaviour.
Operating conditions
Vortex flowmeters operate outside of atmospheric conditions, which means that explosion
protection according to the ATEX directive, regardless of the zone assignment, is fundamentally
not applicable due to the lack of key safety data for the interior of the measuring section.
2.4 Equipment category
Vortex flowmeters are designed in category II 3 G or EPL Gc according to EN 60079-0 und
EN 60079-15 for use in zone 2. The inside of the measuring unit is also approved for zone 2.
Vortex flowmeters are designed according to the "IECEx-Scheme" acc. to "Equipment Protection
Level [EPL] Gc".
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up on the inside of the flowmeter under operating conditions. The operator is responsible
to ensure that the flowmeter is operated safely in terms of the temperature and pressure of the
products used.
In case of operation with flammable products the measuring units must be included in the
periodic pressure tests of the system.
INFORMATION!
Definition of zone 2 acc. to EN 1127-1, Appendix B:
An area in which an explosive atmosphere as a result of the mixture of flammable substances in
the form of gas, steam or mist with air is not expected to occur under normal operation. If,
however, such an atmosphere does occur it only lasts for a brief period of time.

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2.5 Protection types
The vortex flowmeter is designed in the protection type "non-incendive" in accordance with
EN/IEC 60079-15:2010. Explosion protection is ensured in that there are no contacts or hot
surfaces with a sparking effect during operation.
2.6 Ambient temperature / temperature classes
Because of the influence of the temperature of the product, no fixed temperature class is
assigned to vortex flowmeters. The temperature class of these devices is rather a function of the
product temperature and ambient temperature that is present and the specific device version.
The classification is outlined in the following tables.
The tables take into account the following parameters:
•Ambient temperature T
amb
•Product temperature T
m
•Nominal size DN
•Heat resistance of the connecting cable
The marking for the non-incendive version of compact devices is acc. to
ATEX: II 3 G
II 3 GII 3 G
II 3 G
Ex nA ic IIC T6...T2 Gc
Ex nA ic IIC T6...T2 GcEx nA ic IIC T6...T2 Gc
Ex nA ic IIC T6...T2 Gc
IECEx: Ex nA ic IIC T6...T2 Gc
Ex nA ic IIC T6...T2 GcEx nA ic IIC T6...T2 Gc
Ex nA ic IIC T6...T2 Gc
The marking for the non-incendive version of remote versions is acc. to
ATEX: II 3 G
II 3 GII 3 G
II 3 G Ex nA [ic] IIC T6 Gc
Ex nA [ic] IIC T6 GcEx nA [ic] IIC T6 Gc
Ex nA [ic] IIC T6 Gc (signal converter)
II 3 G
II 3 GII 3 G
II 3 G Ex ic IIC T6...T2 Gc
Ex ic IIC T6...T2 GcEx ic IIC T6...T2 Gc
Ex ic IIC T6...T2 Gc (flow sensor)
IECEx: Ex nA [ic] IIC T6 Gc
Ex nA [ic] IIC T6 GcEx nA [ic] IIC T6 Gc
Ex nA [ic] IIC T6 Gc (signal converter)
Ex ic IIC T6...T2 Gc
Ex ic IIC T6...T2 GcEx ic IIC T6...T2 Gc
Ex ic IIC T6...T2 Gc (flow sensor)
The marking contains the following information:
The marking contains the following information:The marking contains the following information:
The marking contains the following information:
II
IIII
II Explosion protection, group II
3
33
3Equipment category 3
G
GG
GGas explosion protection
Ex nA
Ex nAEx nA
Ex nA Protection type "non-incendive equipment"
Ex ic
Ex icEx ic
Ex ic Protection type "Intrinsic safety", protection level "ic" (flow sensor circuit, compact device)
Ex [ic]
Ex [ic]Ex [ic]
Ex [ic] Protection type "Intrinsic safety", protection level "ic" (flow sensor circuit, remote version)
IIC
IICIIC
IIC Gas group, suitable for gas groups IIC, IIB and IIA
T6...T2
T6...T2T6...T2
T6...T2 Temperature class range
Gc
GcGc
Gc EPL, suitable for zone 2
INFORMATION!
In principle, operation is possible in all ranges of the temperature classes T1...T6.

DEVICE DESCRIPTION 2
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The permitted ambient temperature range is indicated on the nameplate; depending on the
device version it is T
amb
= -40...+65°C / -40...+149°F.
The minimum product temperature is -40°C/-40°F.
INFORMATION!
The maximum permissible product temperatures listed in the tables are valid under
the following conditions:
• The measuring device is installed and operated in accordance with the manufacturer's
installation instructions.
• It must be ensured that the flowmeter is not heated by the effects of additional heat radiation
(sunshine, neighbouring system components) and thus operated above the permissible
ambient temperature range.
• Insulation must be limited to the piping. Unobstructed ventilation of the signal converter
must be ensured.

2 DEVICE DESCRIPTION
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Maximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connectionMaximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connection
box mounted above the flow sensor
box mounted above the flow sensorbox mounted above the flow sensor
box mounted above the flow sensor
Max. permissible product and ambient temperatures per temperature class in °C
Max. permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 80 65 100 100 135 135
1
200 200
1
165
1
240 200
1
165
1
DN40…50 80 65 100 100 135 135
1
200 175
1
150
1
240 175
1
150
1
DN65…100 80 65 100 100
1
135
1
130
1
200 150
1
130
1
235
1
150
1
130
1
DN150...300 75 65 100 100 135 135
1
200 185
1
155
1
240 185
1
155
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 176 149 212 212 275 275
1
392 392
1
329
1
464 392
1
329
1
DN40…50 176 149 212 212 275 275
1
392 347
1
302
1
464 347
1
302
1
DN65…100 176 149 212 212
1
275
1
266
1
392 302
1
266
1
455
1
302
1
266
1
DN150...300 167 149 212 212 275 275
1
392 365
1
311
1
464 365
1
311
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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Maximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connectionMaximum permissible product and ambient temperatures with signal converter or connection
Maximum permissible product and ambient temperatures with signal converter or connection
box mounted at side or underneath the flow sensor
box mounted at side or underneath the flow sensorbox mounted at side or underneath the flow sensor
box mounted at side or underneath the flow sensor
Max. permissible product and ambient temperatures per temperature class in °C
Max. permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 85 65 100 100 135 135 200 200 200 1 240 240 240 1
DN40…50 80 65 100 100 135 135 200 200 200 1 240 240 240 1
DN65…100 85 65 100 100 135 135 1 200 200 1 200 1 240 240 1 240 1
DN150...300 80 65 100 100 135 135 200 200 200 1 240 240 240 1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 185 149 212 212 275 275 392 392 392 1 464 464 464 1
DN40…50 176 149 212 212 275 275 392 392 392 1 464 464 464 1
DN65…100 185 149 212 212 275 275 1 392 392 1 392 1 464 464 1 464 1
DN150...300 176 149 212 212 275 275 392 392 392 1 464 464 464 1
1Permanent service temperature of connecting cable and cable entry min. 176°F

2 DEVICE DESCRIPTION
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Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /
signal converters or connection box mounted above the flow sensor
signal converters or connection box mounted above the flow sensorsignal converters or connection box mounted above the flow sensor
signal converters or connection box mounted above the flow sensor
Max. permissible product and ambient temperatures per temperature class in °C
Max. permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 70 65 100 95 1 120
1
115
1
120 120
1
115
1
120 120
1
115
1
DN40…50 70 65 100 95 1 115
1
105
1
120 115
1
105
1
120 115
1
105
1
DN65…100 70 65 100
1
90 1 105
1
95 1 120 105
1
95 1 120 105
1
95 1
DN150...300 65 65 95 90 1 120
1
110
1
120 120
1
110
1
120 120
1
110
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 159 149 212 203
1
248
1
239
1
248 248
1
239
1
248 248
1
239
1
DN40…50 159 149 212 203
1
239
1
221
1
248 239
1
221
1
248 239
1
221
1
DN65…100 158 149 212
1
194
1
221
1
203
1
248 221
1
203
1
248 221
1
203
1
DN150...300 149 149 203 194
1
248
1
230
1
248 248
1
230
1
248 248
1
230
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

DEVICE DESCRIPTION 2
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Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /Max. permissible product and ambient temperatures for devices with painted flow sensors /
Max. permissible product and ambient temperatures for devices with painted flow sensors /
signal converters or connection box mounted at side or underneath the flow sensor
signal converters or connection box mounted at side or underneath the flow sensorsignal converters or connection box mounted at side or underneath the flow sensor
signal converters or connection box mounted at side or underneath the flow sensor
Max. permissible product and ambient temperatures per temperature class in °C
Max. permissible product and ambient temperatures per temperature class in °F
Temperature class T6 T5 T4 T3 T2
T
amb
in °C60 65 60 65 60 65 40 60 65 40 60 65
Nominal size
DN15…25 65 65 95 90 120 120
1
120 120 120
1
120 120 120
1
DN40…50 65 65 85 80 120
1
120
1
120 120
1
120
1
120 120
1
120
1
DN65…100 65 65 95 90 1 120
1
120
1
120 120
1
120
1
120 120
1
120
1
DN150...300 65 65 85 85 120 120
1
120 120 120
1
120 120 120
1
1Permanent service temperature of connecting cable and cable entry min. 80°C
Temperature class T6 T5 T4 T3 T2
T
amb
in °F140 149 140 149 140 149 104 140 149 104 140 149
Nominal size
DN15…25 149 149 203 194 248 248
1
248 248 248
1
248 248 248
1
DN40…50 149 149 185 176 248
1
248
1
248 248
1
248
1
248 248
1
248
1
DN65…100 149 149 203 248
1
248
1
248
1
248 248
1
248
1
248 248
1
248
1
DN150...300 149 149 185 248 248 248
1
248 248 248
1
248 248 248
1
1Permanent service temperature of connecting cable and cable entry min. 176°F

2 DEVICE DESCRIPTION
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2.7 Electrical data
Signal circuits
Signal circuitsSignal circuits
Signal circuits
The vortex flowmeter signal circuits may only be connected to circuits with the following
maximum values. A safety value of U
m
= 253 V is considered for the power supply units.
Flow sensor circuits
Flow sensor circuitsFlow sensor circuits
Flow sensor circuits
With the compact device, the intrinsically safe flow sensor circuits are designed as internal
circuits.
When it comes to the remote versions, the intrinsically safe flow sensor circuits are led through.
The maximum permissible safety values of the flow sensor circuits are listed below:
Remote signal converter, sensor circuit (terminal 1 to 7, color coded)
Remote signal converter, sensor circuit (terminal 1 to 7, color coded)Remote signal converter, sensor circuit (terminal 1 to 7, color coded)
Remote signal converter, sensor circuit (terminal 1 to 7, color coded)
U
o
=6.65V;I
o
= 1107 mA; P
o
= 650 mW; C
o
=1.5µF; L
o
=73µH
Remote flow sensor (terminal 1 to 7, color coded)
Remote flow sensor (terminal 1 to 7, color coded)Remote flow sensor (terminal 1 to 7, color coded)
Remote flow sensor (terminal 1 to 7, color coded)
U
i
=7V;I
i
= 1107 mA; P
i
= 650 mW; C
i
=0;L
i
=0
Device version Circuit
Terminals
Nominal voltage Nominal current
SITRANS FX330
SITRANS FXT030
4...20 mA version
Current output 4...20 mA
C1, C2 12...32 VDC 4...20 mA
Binary output
M1, M2, M3, M4 8...32 VDC ≤100 mA
Current input
I1, I2 9...32 VDC 4...20 mA
SITRANS FX330
SITRANS FXT030
Foundation Fieldbus version
1
Bus connection
A1, A2
B1, B2
9...32 VDC 20 mA
SITRANS FX330
SITRANS FXT030
Profibus PA version 2
1Further information for operation of the FF transmitter are provided in separate supplementary instructions.
2Further information for operation of the PA transmitter are provided in separate supplementary instructions.
INFORMATION!
The verification of intrinsic safety is not necessary for the interconnection of vortex flow sensor
connected to the signal converter, if the cable length doesn't exceed 50 m / 164 ft using the
supplied cable.

INSTALLATION 3
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3.1 Mounting
Installation and setup must be carried out according to the applicable installation standards (e.g.
EN 60079-14) by qualified personnel trained in explosion protection. The information given in the
manuals and the supplementary instructions must be observed at all times.
Vortex flowmeters must be installed in such a way that
•no external forces are affecting the indication unit.
•the device is accessible for any necessary visual inspections and can be viewed from all sides.
•the nameplate is clearly visible.
•it can be operated from a location with secure footing.
Aligning the signal converter
The signal converter and the connection box of remote systems may be aligned on the base up to
a maximum of ±180 . For this reason, the M4 hexagon socket screw connecting the base, the
converter and connection box must be loosened. Once the signal converter and the connection
box has been turned, it must be screwed back on to the base again (tightening torque 2 Nm).
•De-energise the signal converter.
•Loosen the hexagon socket screw 1.
•Turn the signal converter or connection box.
•Screw signal converter or connection box back to the base again.
CAUTION!
The manufacturer is not liable for any damage resulting from improper use or use other than the
intended purpose. This applies in particular to hazards due to insufficient corrosion resistance
and suitability of the materials in contact with product.
1 Allen screws M4 on connection housing

4 ELECTRICAL CONNECTIONS
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4.1 General notes
Rated values for insulation
•The insulation of the vortex flowmeter SITRANS FX330 . .. - Ex is rated in compliance with
IEC 60 664-1. The following rating parameters are taken into account:
•Overvoltage category for signal and instrument loops: II
•Pollution degree of the insulation: 2
Terminal compartment
The signal circuit is electrically connected in the terminal compartment of the signal converter.
The protection type of the terminal compartment is "nA". Unused entries shall be closed in
compliance with EN 60079-15.
Connecting cables
The connecting cables should be selected according to the applicable installation standards (e.g.
EN 60079-14 / VDE 0165) and the maximum operating temperature.
The connecting cable between the measuring sensor and wall bracket with remote systems is
part of the supply.
•The connecting cables must be fixed and laid so they are sufficiently protected against
damage.
•Lay cables so as to ensure that there is sufficient distance between surfaces of the
measuring unit and the connecting cable.
•Supplied blind plugs / cable entries guarantee protection against foreign objects and water
(protection category) IP66 / 67 according to EN 60529.
•The outer diameter of the connecting cable must be within the sealing range of the cable
entry (6...12 mm / 0.24...0.47").
•Unused cable entries are to be closed in accordance with EN 60079-15 (>IP66 / 67).
•Before connecting or loosening the equipotential bonding cable, ensure there are no
differences in potential.
Ensure that the gaskets and incised gasket ring are tight.
Connection terminals
The capacity of the connection terminals is 0.5 mm²to 2.5 mm².
The torque of the connection terminals is 0.6 Nm.
4.2 Power supply
The vortex flowmeter does not require a separate power supply. The required supply for the
built-in electronics is provided via the 4...20 mA current output or the bus connection.
CAUTION!
The IP protection category of the signal converter housing is largely determined by the cable
gland used and the installation.

ELECTRICAL CONNECTIONS 4
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4.3 Inputs / Outputs
The terminal assignment of the built-in electrical equipment is described in the standard
documentation. The signal circuits of the vortex flowmeter may only be connected to
downstream devices or circuits that satisfy the requirements of protective extra-low voltage
(PELV).
Only circuits that are suitable for operation in zone 2 hazardous areas may be connected.
Outside of the vortex flowmeter, measures must be taken for the circuits to prevent the rated
voltage from being exceeded by more than 40% due to temporary faults.
Connecting power supply and I/O functions
•Before connecting or disconnecting the electrical connection cables of the device, make sure
that all cables leading to the signal converter are isolated from the ground of the hazardous
area. This also applies to protective earth (PE) and equipotential bonding conductors (PA).
•All connecting cable conductors and shields that are not securely connected to the
equipotential grounding system of the hazardous area shall be carefully isolated from each
other and from ground (test voltage 1500 V
eff
for non-intrinsically safe cables).

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4.4 Grounding and equipotential bonding
In the case of compact flowmeters and measuring units with flange connections, the flow sensor
is conductively connected to the pipeline. For compact flowmeters and "sandwich" type
measuring units, a separate conductor connected either to the internal or external PA terminal
must be provided to connect to the equipotential bonding.
For remote systems the connection of the flow sensor can either be made via the PA connection
in the signal converter terminal compartment or via the external PA connection.
CAUTION!
Equipotential bonding
Equipotential bondingEquipotential bonding
Equipotential bonding
Vortex signal converters and flow sensors must be included in on-site equipotential bonding acc.
to EN 60079-14! They are connected to the PA terminals.
Ground connection of compact version
1 Electrical grounding connection on connection piece between flow sensor and signal converter
2 Electrical grounding terminal in the housing
Ground connection of remote version
1 Electrical grounding connection on flow sensor
2 Electrical grounding connection on signal converter housing

ELECTRICAL CONNECTIONS 4
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4.5 Flow sensor circuits (remote version only)
Observe the following points when connecting the flow sensor to the signal converter:
•Use only the supplied connecting cable (max. length 50 m / 164 ft).
•Before connecting or loosening the equipotential bonding cable, ensure there are no
differences in potential.
•Connect the connecting cable shield to the equipotential bonding of the hazardous area in the
wall bracket. On the flow sensor side, the shield must be carefully isolated from the earth
(test voltage 500 V
eff
) and connected via the terminal end to the corresponding connector on
the terminal block.
•The terminal compartments of the flow sensor circuits are supplied with a bridge between
the internal PA connection and the terminal with the designation "gnye". This connection
must not be separated.
The flow sensor circuit is designed in protection type intrinsically safe Ex ic IIC.
Figure 4-1: Connection of remote version
1 Terminal connection of flow sensor
2 Terminal connection of signal converter
3 Terminal end pair shielding of flow sensor
4 Filler wire pair shielding (protected with heat shrink tubing)
5 Fork clamp pair shielding on signal converter side
6 Heat shrink tubing

5 OPERATION
20
SITRANS FX330
www.siemens.com/flow 08/2017 - A5E42667474-AA EN
5.1 Start-up
Start-up may only initiate when the vortex flowmeter:
•is correctly installed in the system and connected.
•has been checked for the proper state with regard to its installation and connection
requirements.
•has been correctly locked to the electronics and terminal compartment.
The user of the system must have it checked before start-up in compliance with the national
regulations for checks before startup.
If the device needs to be configured due to the existence of an explosive atmosphere, this can be
done using the supplied bar magnets. There is no need to open the housing as it can be done
through the glass window of the electronics compartment or digitally via the signal output
(HART
®
interface).
5.2 Operation
Vortex flowmeters must be operated in such a way that they remain within the maximum and
minimum permissible temperatures and pressures and the electrical limit values.
Vortex flowmeters may only be operated if the equipment parts necessary for safety are effective
in the long run, and are not rendered inoperable during operation.
In case of operation with flammable products the measuring units must be included in the
periodic pressure tests of the system.
During operation it is only permitted to open the indicator if no explosive atmosphere is present.
5.3 Electrostatic charge
In order to avoid ignition hazards due to electrostatic charge, vortex flowmeters may
not be used in areas with:
•processes that generate strong charges,
•mechanical friction and cutting processes,
•spraying of electrons (e.g. in the vicinity of electrostatic painting systems) or
•pneumatically conveyed dust is exposed.
CAUTION!
Electrostatic charging of the housing surface by friction must be avoided. The devices must not
be dry cleaned.