2
DEVICE DESCRIPTION
8
SITRANS FX330
www.siemens.com/flow 08/2017 - A5E42667474-AA EN
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
3 Equipment category 3
G
GG
G Gas 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.
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