5
1.4.6 Zones, gas groups and T rating
The BA364ND has been certified as Group II,
Category 3 G apparatus as defined in the ATEX
Directive and as Ex nL T5, Tamb –20 to 60
o
C.
‘L’ indicates that the BA364ND uses energy-
limiting techniques to achieve compliance as
defined in EN 60079-15. This technique is based
on the philosophy of
intrinsic safety
which limits
the current and voltage applied to components
which may generate a spark in normal operation.
e.g. switches and potentiometers.
These approvals confirm that the BA364ND is
safe in normal operation and may be installed in:
Zone 2
explosive gas air mixture not
likely to occur, and if it does
will only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1
450oC
T2
300oC
T3
200oC
T4
135oC
T5
100oC
At an ambient temperature between –20 and
+60
o
C.
This allows the BA364ND to be installed in Zone
2 hazardous areas (low risk) and to be used with
most common industrial gases.
1.4.7 Certification label Information
The certification label is fitted in a recess on the
top of the enclosure. It shows the ATEX
certification information, BEKA associates name
and web site address. The instrument serial
number and date of manufacture are recorded on
a separate label inside the terminal compartment
