BEKA BA317NE, Manual

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3. CERTIFICATION
The BA317NE has ATEX and IECEx Ex nA gas and
Ex tc dust certification. The main sections of this
instruction manual describes ATEX gas certification.
ATEX dust certification is described in Appendix 1 and
IECEx gas and dust certification in Appendix 2.
3.1 ATEX Ex nA certification
Notified Body Intertek Testing and Certification Ltd
have issued the BA317NE 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 the EEA 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 Tachometer has been certified as Group II
Category 3G Ex ic nA IIC T5 Gc –40°C
≥ Ta ≥ +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 Tachometer's front panel push button contacts
are non incendive and have been certified intrinsically
safe Ex ic, without the need for an external Zener
barrier or galvanic isolator, as shown on the Type
Examination Certificate. This allows the Tachometer
to be adjusted and configured live when installed in a
Ex n panel enclosure located in Zone 2.
When connected to a suitable system and correctly
mounted in a panel enclosure complying with the
requirements for Type of protection 'n', the panel
enclosure containing the BA317NE Tachometer 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
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.
3.3 Special conditions for safe use
Special conditions for safe use are specified by the
Ex nA certificate indicated by the certificate number's
'X' suffix. These state that the BA317NE
Tachometer should be:
a. Mounted such that the instrument terminals
are protected by at least an IP54 enclosure
certified to IEC 60079-0 or IEC 60079-15 as
appropriate.
b. Be supplied from limited energy circuits with
output parameters in normal operation equal
to, or less than the instruments input
parameters.
These special conditions for safe use can be
satisfied by mounting the BA317NE in an Ex n, Ex e
or Ex p panel enclosure. For ATEX Category 3
installations in Zone 2, self or third party certified
Ex n, Ex e or Ex p panel enclosures may be used.
Additional requirement apply for non-metallic panel
enclosures.
3.4 Power supply
The input safety parameters for the power supply
terminals 1 and 2 are:
Ui = 30dc
Ii = 100mA
This allows the BA317NE to be powered from any dc
supply which in normal operation has an output
voltage of less than 30V. See section 4.1 for power
supply recommendations.
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