11
5. INSTALLATION
5.1 Location
The BA334D rate totaliser is housed in a
robust IP66 glass reinforced polyester (GRP)
enclosure incorporating an armoured glass
window and stainless steel fittings. It is
suitable for exterior mounting in most industrial
environments, including off-shore and waste
water treatment. Please consult BEKA
associates if high vibration is anticipated.
The BA334D enclosure is surface mounting.
Accessory kits described in sections 9.7 & 9.8
of this manual enable the instrument to be
mounted onto a vertical or horizontal pipe, or
directly onto a flowmeter conduit entry.
The field terminals and the two mounting holes
are located in a separate compartment with a
sealed cover allowing the instrument to be
installed without exposing the display
assembly.
The BA334D earth terminal is connected to the
internal EMC filters. For maximum radio
frequency interference rejection this terminal
should be connected to a local earth, or to a
cable screen which is earthed in the safe area.
The BA334D enclosure is supplied with a
bonding plate to ensure electrical continuity
between the three conduit / cable entries.
5.2 Installation Procedure
Fig 6 illustrates the instrument installation
procedure.
a.
Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b.
Mount the instrument on a flat surface
and secure with two M6 screws through
the 'B' holes. Alternatively use one of the
mounting kits described in section 9.7
c.
Remove the temporary dust seals from
the three cable entries and install the
required glands, conduit fittings or
blanking plugs.
Note
: The temporary dust seals fitted for
transit do not maintain the IP66
protection of the BA334D enclosure.
d.
Connect the field wiring to the terminals
as shown in Fig 7.
e. Replace the instrument terminal cover
and evenly tighten the two 'A' screws.
Fig 6 BA334D installation procedure
5.3 EMC
The BA334D complies with the requirements of
the European EMC Directive 89/336/EEC. For
specified immunity all wiring should be in
screened twisted pairs and the BA334D earth
terminal should be locally earthed or connected
to a cable screen which is earthed in the safe
area.
To prevent circulating currents, cable screens
should only be earthed at one point in the safe
area.
Summary of Contents for BA334D
Page 12: ...12 Fig 7 Dimensions and terminal connections ...
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