APPENDIX 1
ATEX dust
certification
A1.0 ATEX dust certification
In addition to ATEX certification permitting
installation in explosive gas atmospheres which is
described in the main section of this instruction
manual, the BA484DF-F FOUNDATION™ fieldbus
display is available ATEX certified for use in the
presence of combustible dusts.
If ATEX dust
certification is required it must be requested when
the BA484DF-F FOUNDATION™ fieldbus display
is purchased.
WARNING
Before installing a BA484DF-F Fieldbus
Display in the presence of a combustible
dust,
ensure
that
the
certification
information label which is located on the
top of the instrument specifies dust
certification - see section A1.2
A1.1 Zones and Maximum Surface
Temperature
The BA484DF-F has been ATEX certified as
Group II, Category 1 D apparatus Tamb = -40 to
60ºC, with a Maximum Surface Temperature of
125ºC.
When
installed
as
specified
by
IEC 60079-14, the Fieldbus Display may be
installed in:
Zone 20 explosive atmosphere in the
form of a cloud of
combustible dust in air is
continuously present, or for
long periods or frequently.
Zone 21 explosive atmosphere in the
form of a cloud of
combustible dust in air is
likely to occur occasionally
in normal operation.
Zone 22 explosive atmosphere in the
form of a cloud of
combustible dust in air is not
likely to occur in normal
operation, but if it does
occur, will only persist for a
short period.
Be used with dusts having a Minimum Ignition
Temperature of:
Dust cloud
188ºC
Dust layer on BA484DF-F 200ºC
up to 5mm thick
Dust layer on BA484DF-F Refer to
over 5mm thick.
EN 60079-14
At an ambient temperature between -40 and +60ºC
Note:
Operating temperature range of BA484DF-F
is –20ºC and +60ºC.
A1.2 Certification Label Information
The certification label is fitted in a recess on the
top outer surface of the enclosure. It shows the
ATEX dust certification information including the
maximum
surface
temperature
and
ingress
protection, plus the ATEX gas certification
information. Non European information may also
be shown.
The instrument serial number and date of
manufacture are recorded on a separate label
inside the terminal compartment.
A1.3 Calibration & maintenance
The ATEX dust certification relies on the
BA484DF-F FOUNDATION™ fieldbus display
enclosure being dust-tight.
Therefore the control
and terminal covers should only be removed when
dust cannot enter the instrument enclosure. Before
replacing the control and terminal covers ensure
that the sealing gaskets are undamaged and are
free from foreign bodies.
18
Summary of Contents for FOUNDATION BA484DF-F
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