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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-P is available ATEX
certified for use in the presence of combustible
dusts. If ATEX dust certification is required it must
be reequested when the BA484DF-P Fieldbus
Display is purchased.
WARNING
Before installing a BA484DF-P 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-P has been ATEX certified as
Group II, Category 1 GD apparatus Tamb = -20
to 60
o
C, with a Maximum Surface Temperature of
125
o
C. When installed as specified by EN 50281
Part 1-2 ‘Selection, installation and maintenance of
electrical apparatus protected by enclosures’, 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
188
o
C
Dust layer on BA484DF-P 200
o
C
up to 5mm thick
Dust layer on BA484DF-P Refer to
over 5mm thick.
EN 61241
part 14.
At an ambient temperature between -20 and +60
o
C
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 Fieldbus
Display enclosure being dust-tight. Therefore the
control and terminal covers should only be
removed when dust can not enter the instrument
enclosure. Before replacing the control and
terminal covers ensure that the sealing gaskets are
undamaged and are free from foreign bodies.
Summary of Contents for BA484DF-P
Page 9: ...9 Fig 6 Dimensions and terminal connections...
Page 15: ...15...
