6
5.2 Installation Procedure
Fig 4 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 M6 screws through the two 'B'
holes. Alternatively use one of the pipe or
stem mounting kits described in sections
8.5 and 8.6
c.
Remove the temporary hole plug and
install an Ex n or Ex e cable gland or
conduit entry. If more than one entry is
required, replace one or both IP66
stopping plugs with an Ex n or Ex e cable
gland or conduit entry.
d.
Connect the field wiring to the terminals as
shown in Fig 5.
f.
Ensure that the instrument terminal cover
sealing gasket is undamaged and free
from dirt and foreign bodies. Replace the
terminal cover and tighten the two 'A'
screws.
Fig 4 BA304ND installation procedure
5.3 EMC
The BA304ND complies with the requirements of
the European EMC Directive 2004/108/EC. For
specified immunity all wiring should be in screened
twisted pairs.
Fig 5 Dimensions and terminal connections
6. CALIBRATION
The BA304ND will be supplied calibrated as
requested at time of ordering. If calibration is not
requested, the indicator will be set to display 00.0
with 4.000mA input, and 100.0 with 20.000mA
input.
The indicator is conditioned and calibrated by plug-
in links and two multi-turn potentiometers located
behind the control cover which is secured by two
'C' screws - see Figs 4 & 6.
CAUTION!
The plug-in links and the two
potentiometers are energy limited and
will not cause ignition in normal
operation. Ex 'n' certification requires
that the instrument enclosure provides
IP54 protection, the control cover may
therefore only be removed for calibration
when there is no possibility of dust or
water ingress. Before replacing the
cover ensure that the sealing gasket is
undamaged and free from dirt and
foreign bodies.
