5. INSTALLATION
5.1 Location
The BA354NE Rate Totaliser is housed in a robust
IP66 glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings suitable for exterior mounting
in industrial installations at ambient temperatures
between -20 and +70ºC. The instrument will
continue to totalise and has been certified at -40ºC,
but the display ceases to function delow -20ºC. The
BA354NE should be positioned where the display is
not in continous direct sunlight.
The BA354NE is surface mounting, but may be pipe
mounted using one of the accessory kits described
in section 10.5 of this manual. 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.
Terminals 2 and 4 are internally joined and may be
used for linking the return 4/20mA wire - see Fig 2.
Similarly terminals 5 and 6 are internally joined and
may be used for linking cable screens. The Rate
Totaliser’s earth terminal is connected to the carbon
loaded GRP enclosure. If this enclosure is not bolted
to an earthed post or structure, the earth terminal
should be connected to the plant potential equalising
conductor.
The enclosure is fitted with a bonding plate to
ensure electrical continuity between the three
conduit / cable entries.
5.2 Installation Procedure
Fig 4 illustrates the installation procedure.
1. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
2. Mount the instrument on a flat surface and
secure with screws or bolts through the two 'B'
holes. Alternatively use one of the pipe
mounting kits described in section 10.5.
3. Remove the temporary hole plug and install
Ex n or Ex e cable gland or conduit fitting. If
more than one entry is required, one or both of
the Ex e stopping plugs may be replaced with
an Ex n or Ex e cable gland or conduit fitting.
4. Connect the field wiring to the terminals as
shown in Fig 5 and replace the instrument
terminal cover. Evenly tighten the two 'A'
screws.
Fig 4 BA354NE installation procedure
Fig 5 Dimensions and terminal connections
5.3 EMC
The BA354NE Rate Totaliser complies with the
requirements of the European EMC Directive
2004/108/EC. For specified immunity all wiring
should be in screened twisted pairs, with the
screens earthed in the safe area.
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