8
3. CERTIFICATION
The BA384NG has ATEX, IECEx and ETL Ex nA gas
and Ex tc dust certification. The main sections of
this instruction manual describes ATEX Ex nA gas
certification. ATEX dust certification is described in
Appendix 1, IECEx gas and dust certification in
Appendix 2 and ETL certification in Appendix 3.
3.1 ATEX Ex nA certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA384NG with a Type Examination
Certificate number ITS16ATEX48409X. This has
been used to confirm compliance with the European
ATEX Directive for Group II, Category 3G
equipment. The instrument carries the Community
Mark and, subject to local codes of practice, may be
installed in any of the European Economic Area
(EEA) member countries and in EFTA states,
Iceland, Liechtenstein and Norway. ATEX
certificates are also acceptable in Switzerland and
Turkey. The European Commission's Blue Guide
lists the member states, overseas countries and
territories that have adopted harmonisation
legislation.
This section of the instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN 60079-14
Electrical installations
design, selection and erection
. When designing
systems for installation outside the UK the local
Code of Practice should be consulted.
3.2 Zones, gas groups and T rating
The BA384NG Rate Totaliser has been certified as
Group II Category 3G Ex ic nA IIC T5 Gc
Ta -40ºC to +60°C apparatus. This is non-sparking
apparatus complying with EN 60079-15
Equipment
protection by type of protection 'n'
that minimises the
risk of arcs or sparks capable of creating an ignition
hazard occurring during conditions of normal
operation.
The Rate Totaliser's front panel push button contacts
are non incendive and have been certified
intrinsically safe Ex ic without Zener barriers or
galvanic isolators as shown on the Type
Examination Certificate. This allows the Rate
Totaliser to be adjusted and configured live when
installed in Zones 2.
When connected to a suitable system the BA384NG
Rate Totaliser 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
In gases that may safely be used with equipment
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
At ambient temperatures between -40 and +60
o
C.
This allows use with
all commonly used industrial
gases except carbon disulphide CS
2
.
3.3 Safety parameters
The certificate specifies input safety parameters in
normal operation i.e. without faults for all the
instrument terminals. Where only a voltage or only
a current is specified, the unspecified parameter will
be defined by components within the BA384NG
Rate Totaliser.
3.4 Special conditions for safe use
The Ex nA certificate has an ‘X’ suffix indicating that
the certificate defines special conditions for safe
use. These state that the BA384NG Rate Totaliser
should be:
a. Supplied from a
limited energy
circuit with
output parameters in normal operation equal
to, or less than the instrument’s input
parameters. The certificate states that It is
not
necessary to power the instrument from
an intrinsically safe interface, such as a
certified shunt diode safety barrier or a
galvanic isolator to comply with this
requirement.
b. Fitted with cable entry glands or conduit
fittings which maintain the impact and ingress
protection of the enclosure. Certified Ex e or
Ex n components satisfy these requirements.
The BA384NG is supplied fitted with one
certified M20 stopping plug and one
temporary hole plug which should be replaced
with the required gland or conduit fitting.
