364Ax-Gx Instruction Manual
57
Certificate ATEX II 1/2G Ex d IIC T6 and II 1/2D Ex tD A21 IP67 T85°C
ZELM certificate number ZELM 06 ATEX 0302 X
The meaning of ATEX code is as follows:
II :
Group for surface areas (not mines)
1/2 :
Category - It m eans that onl y a part of the tr ansmitter complies w ith
category 1 and a second part complies with category 2 (see the picture on
the right)
G :
Gas (dangerous media)
D :
Dust (dangerous media)
T85°C: Maximum surface temperature of the t ransmitter enclosure with Ta
(ambient temperature) +75°C for Dust (not Gas) with a dust layer up to 5
mm. For application with dust la yer between 5 and 50 mm, ma ximum
surface temperature must be consider according to IEC 61241-14 chapter
6.3.3.3.
Note: the number close to the C E 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 E N
Standards:
Ex d:
Explosion proof/Flameproof
Ex tD A21 : C onstruction with flameproof of protection method suitable for Dust-
Zone 21
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 c an 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 suitab le for "Zone 21" according to the EN
50281 as it is shown on the relevant part of pictures on the right.
Application with Gas
Application with Dust
Note: the protection is mainly assured by the "IP degree"
associated to the low power from the supply
Certificate ATEX II 3G Ex nL IIC T6 and II 3D Ex tD A22 IP67 T85°C
ZELM certificate number ZELM 06 ATEX 0302 X
The meaning of ATEX code is as follows:
II :
Group for surface areas (not mines)
3 :
Category
G :
Gas (dangerous media)
D :
Dust (dangerous media)
T85°C: Maximum surface temperature of the t ransmitter enclosure with Ta
(ambient temperature) +75°C for Dust (not Gas) with a dust layer up to 5
mm. For application with dust la yer between 5 and 50 mm, ma ximum
surface temperature must be consider according to IEC 61241-14 chapter
6.3.3.3.
The other marking refers to the protection type used according to the standards:
Ex nL :
Type of protection "n" with "energy limitation" technique
Ex tD A22 : C onstruction with flameproof of protection method suitable for Dust-
Zone22
IIC :
Gas group
T6 :
Temperature class of the transmitter ( which corresponds to 85 °C
max) with a Ta (ambient temperature) +40°C
Note: when installed this transmitter must be supplied by a voltag e limiting device
which will prevent the rated voltage of 42 V d.c. being exceeded.
About the applications, this transmitter can be used in “Zone 2” (Gas) and "Zone 22"
(Dust) classified areas (unlikely/infrequent hazard) as it is shown on the picture on
the right.
Application with Gas
Note: the transmitter must be connected to a supply with 42
V d.c. max output voltage as above indicated. The current
of the transmitter is less than 25 mA.
Application with Dust
Note: the protection is mainly assured by the "IP degree"
associated to the low power from the supply.
Zone “2”
2600T Tx
Category 3G
(Ex nL)
2600T Tx
Category 3D
IP 6x
(Ex nL)
