
15
5.
INSTALLATION
5.1
Location
The BA334G Rate Totaliser is housed in robust IP66
glass reinforced polyester (GRP) enclosure
incorporating an armoured glass window and
stainless steel fittings making it suitable for exterior
mounting in most industrial on-shore and off-shore
installations. The Rate Totaliser should be
positioned where the display is not in continuous
direct sunlight. Special conditions apply for Zone 0
installations, see section 3.2.
Field wiring terminals are located on the rear of the
Rate Totaliser assembly as shown in Fig 7.
To ensure electrical continuity between the two
conduit or cable entries, the enclosure is fitted with a
bonding plate which includes an M4 earth stud.
This may be mounted on the inside or outside of the
enclosure. If the carbon loaded GRP enclosure is
not bolted to an earthed post or structure, this earth
stud should be connected to a local earth or the
plant potential equalising conductor.
An insulated M4 stud is provided in the bottom right
hand corner of the back-box for interconnecting
cable screens.
The BA334G Rate Totaliser may be pipe mounted
using a BA393G pipe mounting kit, or panel
mounted using a BA394G or BA395G panel
mounting kit.
5.2
Installation Procedure
Fig 6 illustrates the instrument installation
procedure.
A. Remove the Rate Totaliser assembly by
unscrewing the four captive 'A' screws.
B. Mount the enclosure back-box on a flat surface
and secure with screws or bolts through the
four 'B' holes. Alternatively use one of the pipe
or panel mounting kits which are available as
accessories.
C. Remove the temporary hole plug and install an
appropriate IP and temperature rated M20 x
1.5mm cable gland or conduit fitting. If two
entries are required, the supplied IP66
stopping plug should be replaced with an
appropriate IP and temperature rated M20 x
1.5mm cable gland or conduit fitting.
D. Connect the field wiring to the terminals as
shown in Fig 7. Replace the instrument
assembly on the back-box and evenly tighten
the four 'A' screws.
Fig 6 BA334G installation procedure
Fig 7 Dimensions and terminal connections
Содержание BA334E
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