KROHNE H250 M40 ATEX II3G Ex nA EN - Manual (Page 7)

DEVICE DESCRIPTION
2
7
H250 M40
www.krohne.com 01/2012 - 4001485201- MA H250/M40-Ex-II3G-AD R01 en
2.6 Protection types
The variable area flowmeter is designed in protection type "non-sparking" according to
EN 60079-15:2005. Explosion protection is ensured by the absence of sparking contacts and hot
surfaces during normal operation.
The marking is: II 3G Ex nA IIC T6 Gc or II 3G Ex nA IIB T6 Gc II 3G Ex nA IIC T6 Gc or II 3G Ex nA IIB T6 Gc II 3G Ex nA IIC T6 Gc or II 3G Ex nA IIB T6 Gc II 3G Ex nA IIC T6 Gc or II 3G Ex nA IIB 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
Ex nA Ex nA Ex nA Ex nA Non-sparking equipment
IIC IIC IIC IIC Gas group, Suitable for gas groups IIC, IIB and IIA
IIB IIB IIB IIB Gas group, Suitable for gas groups IIB and IIA
T6 T6 T6 T6 Temperature class, suitable for temperature classes T6 ... T1
Gc Gc Gc Gc EPL, suitable for zone 2
AD_H250_M40_II3G_R01_en_4001485201_PRT.book Page 7 Tuesday, January 24, 2012 8:46 AM