- 50 -
ADDENDUM FOR "EX SAFETY" ASPECTS AND "IP" PROTECTION (EUROPE)
c) Certificate ATEX II 1/2 GD, EEx d IIC T6
IP67
T85
°
C
(-40
°
C
≤
Ta
≤
+75
°
C)
CESI Certificate number CESI 02ATEX 027
The meaning of ATEX code is as follows:
II :
Group for surface areas (not mines)
1/2 :
Category - It means that only a part of the transmitter complies with category 1 and a
second part complies with category 2 (see next application sketch)
G :
Gas (dangerous media)
D :
Dust (dangerous media)
T85
°
C:
Maximum surface temperature of the transmitter enclosure with a Ta (ambient temperature) +75
°
C
for Dust (not Gas) with a dust layer up to 50 mm depth.
(Note: the number close to the CE marking of the transmitter safety label identifies the Notified Body which has
responsibility for the Surveillance of the production)
The other marking refers to the protection type used according to relevant EN Standards:
EEx d:
Flameproof
IIC :
Gas group
T6 :
Temperature class of the transmitter (which corresponds to 85
°
C max) with a Ta (ambient temperature) +75
°
C.
About the applications, this transmitter can be used in Zone “0” (Gas) classified areas (continuous hazard) with its “process
part” only, whereas the remaining part of the transmitter, i.e. its enclosure, can be used in Zone 1 (Gas), only (see sketch
below). Reason of this is the process part of the transmitter (normally called primary transducer) that provides inside separation
elements to seal off the electrical sensor from the continuously hazardous process, according to the EN50284 and EN50018.
About Dust application, the transmitter is suitable for "Zone 21" according to the EN 50281 as it is shown on the relevant part of
the sketch:
APPLICATION FOR PRESSURE TRANSMITTER EEx d CATEGORY 1/2 GD
+
Zone "0"
dangerous
medium
(process)
Tank
IP code
About the degree of protection provided by the enclosure of the pressure transmitter, the 2600T SERIES has been certified IP67
according to EN 60529 standard.
The first characteristic numeral indicates the protection of the inside electronics against ingress of solid forein objects including
dusts. The assigned “6” means an enclosure dust-tight (no ingress of dust).
The second characteristic numeral indicates the protection of the inside electronics against ingress of water. The assigned “7”
means an enclosure water-protected against a temporary immersion in water under standardized conditions of pressure and time.
2600T Tx
category
1/2G EEx d
Zone 0 / Zone 1
Separation
elements
Zone "1"
primary
transducer
Zone "20"
dangerous
medium
(process)
Silo
2600T Tx
category 1/2D
IP6x
(EEx d)
Zone "21"
Application with Gas
Application with Dust
+
Note: the protection is mainly assured by the "IP
degree" associated to the low power from the supply.
Summary of Contents for 264B
Page 53: ... 53 ...
Page 54: ... 54 ...
