DEVICE DESCRIPTION
2
9
OPTISWIRL 4200
www.krohne.com
01/2017 - 4004274302 - AD OPTISWIRL4200 Ex-II2G R02 en
2.6 Protection types
2.7 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 is:
ATEX
II 2 G Ex ia IIC T6...T2 Gb
II 2 G Ex ia IIC T6...T2 Gb
II 2 G Ex ia IIC T6...T2 Gb
II 2 G Ex ia IIC T6...T2 Gb (compact device; flow sensor in remote version)
or
II 2 G Ex ia IIC T6 Gb
II 2 G Ex ia IIC T6 Gb
II 2 G Ex ia IIC T6 Gb
II 2 G Ex ia IIC T6 Gb (signal converter in remote version)
IECEx
Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb
Ex ia IIC T6...T2 Gb (compact device; flow sensor in remote version)
or
Ex ia IIC T6 Gb
Ex ia IIC T6 Gb
Ex ia IIC T6 Gb
Ex ia IIC T6 Gb (signal converter in remote version)
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
2222
Equipment category 2
G
G
G
G
Gas explosion protection
Ex ia
Ex ia
Ex ia
Ex ia
Intrinsically safe, protection level "ia"
IIC
IIC
IIC
IIC
Gas group, suitable for gas groups IIC, IIB and IIA
T6...T2
T6...T2
T6...T2
T6...T2
Temperature class range
(compact device; flow sensor in remote version)
T6
T6
T6
T6
Temperature class
(signal converter in remote version)
Gb
Gb
Gb
Gb
EPL, suitable for zone 1
INFORMATION!
In principle, operation is possible in all ranges of the temperature classes T1...T6.
