3. INTRINSIC SAFETY CERTIFICATION
3.1 ATEX certificate
The BA378C has been issued with an EC-Type
Examination Certificate number BAS02ATEX1185X
by EECS showing compliance with the European
ATEX Directive 94/9/EC for Group II, Category 1
gas atmospheres, EEx ia IIC T5. The instrument
bears the Community Mark and, subject to local
codes of practice, may be installed in any of the
European Economic Area (EEA) countries. i.e.
Austria, Belgium, Denmark, Finland, France,
Germany, Greece, Ireland, Italy, Luxembourg, The
Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom. ATEX
certificates are also accepted in Norway, Iceland,
Liechtenstein, Switzerland and the Czech Republic.
This manual describes installations which conform
with BS EN60079: Part 14: 1997 Electrical
Installation in Hazardous Areas. When designing
systems for installation outside the UK, the local
Code of Practice should be consulted.
3.2 Other intrinsic safety certifications
Please contact BEKA for a list of non-European
intrinsic safety approvals.
3.3 Zones, Gas Groups and T rating
The BA378C and accessories have been certified
EEx ia IIC T5. When connected to an approved
system the transmitter may be installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture likely
to occur in normal operation.
Zone 2 explosive gas air mixture not
likely to occur, and if it does,
it 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
450
o
C
T2
300
o
C
T3
200
o
C
T4
135
o
C
T5
100
o
C
This allows the BA378C to be installed in all Zones
and to be used with most common industrial gases
at ambient temperature between -40 and +60
o
C.
Note: minimum operating temperature is -20
o
C.
3.4 Certification information label
The certification information label, which is fitted on
the side of the instrument, shows the ATEX
certification information plus the instrument serial
number and date of manufacture.
3.5 Input terminals 1, 2, 3 & 4
When the BA378C is installed in a hazardous area
the input terminals may be connected to any
floating or earthed sensor complying with the
requirements for
simple apparatus
as defined in
Clause 5.4 of EN50020:1994
.
i.e. the sensor
generates less than 1.5V, 100mA, or 25mW.
Thermocouples and resistance thermometers are
simple apparatus
and any floating or earthed
device may be connected to the BA378C, providing
that both are installed within the hazardous area.
The permitted maximum parameters for the cables
connecting the transmitter to the sensor are 4µF
and 9.2mH in the most onerous gas group IIC
(hydrogen). These are large and are very unlikely
to be exceeded on any thermocouple or resistance
thermometer installation.
If the transmitter input is to be connected to a
device which does not comply with the
requirements for simple apparatus, a system
certificate should be obtained, or the safety of the
system assessed using the entity concept. The
certified safety description of the BA378C input
terminals is:
Uo
=
8.61V
Io
=
62mA dc
Po
=
0.14W
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