14
5. INSTALLATION
5.1
Location
The BA384NG 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 Zone 2 on-shore and
off-shore installations. The Rate Totaliser should be
positioned where the display is not in continuous
direct sunlight.
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 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 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 BA384NG Rate Totaliser may be pipe mounted
using a BA393G pipe 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 a pipe
mounting kit which is available as an
accessories.
C. Remove the temporary hole plug and install an
appropriate IP and temperature rated certified
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 certified
M20 x 1.5mm cable gland or conduit fitting.
D. Pass the field wiring through the cable entry in
the back-box and connect it to the instrument
terminals as shown in Fig 7. Replace the
instrument assembly on the back-box and
evenly tighten the four 'A' screws.
Fig 6 BA384NG installation procedure
Fig 7 Dimensions and terminal connections