Endress+Hauser PROline promag 53 Mode D'emploi page 21

XA 039D/06/a3/11.01
50100736
FM+SGML 6.0
PROline promag 53
II3G
Ex documentation
for the BA 053D and BA 054D operating instructions
according to Directive 94/9/EC (ATEX)
Instrument groups
applies to instruments used in underground mining operations, as well as
I their above ground operations, which can be endangered by mine gas
and/or flammable dusts.
applies to instruments used in the remaining areas which can be
II
endangered by a potentially explosive atmosphere.
Instrument category
Instruments of this category are for use in areas where ignitable
1G 1D
atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, can exist all of the time or for long periods of
(0) (20)
time or else frequently.
Instruments of this category are for use in areas where ignitable
2G 2D
atmospheres caused by a mixture of air and gases, vapours or mists
(1) (21)
or by dust/air mixtures, can exist some of the time.
Instruments of this category are for use in areas where ignitable
3G 3D atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, are not likely to exist. However, if they do
(2) (22)
occur then in all probability, only seldom or for short periods of time.
(The figures in brackets refer to IEC)
Built according to European norm = E
Explosion protected electrical equipment = Ex
Type of protection
EN
nA non-sparking apparatus
nR
restricted breathing
nL low energy apparatus
nP apparatus with simple
pressurised encapsulation
Explosion groups
EN Gases and vapours
IEC (examples)
- Ammonia
IIA
- Acetone, aircraft fuel, benzene, crude oil,
IIA
diesel oil, ethane, ethanoic acid, ether, gaso-
lines, heating oil, hexane, methane, propane
- Ethylene, isoprene, town gas
IIB
- Acetylene, carbon disulphide, hydrogen
IIC
Temperature class
EN / IEC
T1 450 °C
T2 300 °C
T3 200 °C
T4
135 °C
T5 100 °C
T6 85 °C
as an example:
Definition
EN
nC sparking apparatus in which the
contacts are protected appropriately
but not, however, through restricted
breathing, low energy or pressurised
encapsulation
Minimum
ignition
energy [mJ]
--
0,18
0,06
0,02
Maximum surface temperature
842 °F
572 °F
392 °F
275 °F
212 °F
185 °F
<
II 3G E Ex nC IIB T4