BEKA BA314NG, Manual

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5. INSTALLATION
5.1 Location
The BA314NG Tachometer is housed in a 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 Tachometer should be positioned where the
display is not in continuous direct sunlight.
Field wiring terminals are located on the rear of the
Tachometer assembly as shown in Fig 7.
To ensure electrical continuity between the two
conduit or cable entries, the enclosure back-box is
fitted with a bonding plate which includes an M4 earth
stud. The bonding plate 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 to the plant potential equalising
conductor.
An insulated M4 stud is provided in the bottom right
hand corner the back-box for interconnecting cable
screens.
The BA314NG Tachometer may be pipe mounted
using a BA393G pipe mounting kit.
5.2 Installation Procedure
Fig 6 illustrates the instrument installation procedure.
A. Remove the Tachometer 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
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. Feed the field wiring through a gland in the
back-box and tighten to maintain ingress
protection. 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 BA314NG installation procedure
Fig 7 Dimensions and terminal connections
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