KROHNE DK 32-DK 34 ATEX II3G Ex nA-ic EN - Manual (Page 6)

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DEVICE DESCRIPTION
6
DK32 DK34
www.krohne.com 03/2013 - 4002148602 AD DK32/34 II3G R03 en
2.6 Protection types
Variable area flowmeters can be operated as protection type "non-sparking" or "intrinsic safety
protection level ic". Explanations of the individual protection types appear below.
The variable area flowmeter is designed with protection type "non-sparking" in accordance with
EN 60079-15. Protection against explosion is ensured in that no sparking contacts or hot
surfaces lead to ignition under normal operating conditions.
The marking is: II 3G Ex nA IIC T6 Gc II 3G Ex nA IIC T6 Gc II 3G Ex nA IIC T6 Gc II 3G Ex nA IIC T6 Gc
The variable area flowmeter is designed with protection type "intrinsic safety, protection level ic"
in accordance with EN 60079-11. The explosion protection is ensured by way of limiting the
current and voltage so that no energy capable of ignition can occur.
The marking is: II 3G Ex ic IIC T6 Gc II 3G Ex ic IIC T6 Gc II 3G Ex ic IIC T6 Gc II 3G Ex ic IIC T6 Gc
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 Group II explosion protection
3333 Equipment category 3
G G G G Gas explosion protection
nA nA nA nA Non-sparking equipment
IIC IIC IIC IIC Gas groups IIA, IIB, IIC
T6 T6 T6 T6 Temperature classes T6 ... T1
Gc Gc Gc Gc Equipment protection levels (EPL)
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 Group II explosion protection
3333 Equipment category 3
G G G G Gas explosion protection
ic ic ic ic Intrinsically safe equipment, protection level ic
IIC IIC IIC IIC Gas groups IIA, IIB, IIC
T6 T6 T6 T6 Temperature classes T6 ... T1
Gc Gc Gc Gc Equipment protection levels (EPL)
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