27
To adjust an alarm setpoint select 'SPx1' or
'SPx2' and press
P
which will reveal the current
setting. Each digit of the setpoint may be
adjusted using the
Up
and
Down
push-buttons,
and the
P
button to move to the next digit.
When the required setpoint has been entered,
pressing
E
will return the display to the 'SPx1' or
'SPx2' prompt from which the other setpoint may
be selected, or the indicator may be returned to
the display mode by pressing
E
again.
Direct access to the alarm setpoints is only
available when the
menu is enabled - see
section 8.2.11
8.3 Display backlight
The BA554D can be supplied with LED
backlighting to improve display contrast when
the instrument is installed in a poorly illuminated
area. The backlight is electrically segregated
from the measuring circuit and may be powered
from any 18 to 30V dc supply.
Fig 14 Display backlight
Reducing the supply voltage below 18V, or
fitting a curent limiting resistor in series with the
supply will reduce the display brilliance.
8.4 External push-buttons
For applications requiring frequent access to the
programme menus the BA554D can be supplied
with an external membrane keypad. These
switches, which maintain the IP66 integrity of
the enclosure, allow all functions to be controlled
without removing either of the enclosure covers.
8.5 Pipe mounting kits
Two pipe mounting kits are available for
securing the BA554D to a horizontal or vertical
pipe.
BA392D Stainless steel bracket secured by
two worm drive hose clips for 60 to
80mm outside diameter pipes.
BA393
Heavy duty stainless steel bracket
secured by a single 'V' bolt. Will
clamp to any pipe with an outside
diameter between 40 and 80mm.
8.6 Stem mounting kit
The BA395 stem mounting kit comprises a short
length of stainless steel conduit with a male M20
x 1.5 thread at both ends which enables the
BA554D to be mounted directly onto a flow
transmitter.
