BEKA BA524D, Manual

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move between digits, set the revised input current
in mA. Press
E to return to the sub-menu from
which another break-point can be selected.
Repeat this procedure for all the break-point input
currents to be changed, and then return to the
'InPut' prompt in the sub-menu by pressing
E.
8.4 Tare function
The tare function is a factory fitted software
accessory, primarily intended for use with weighing
systems.
When the tare software is installed, pushing and
holding the
P button for more than 3 seconds sets
the indicator display to zero irrespective of the
input current, and activates the tare annunciator,
an arrow on the top left hand corner of the display.
Subsequent operation of the
P push-button for less
than 3 seconds will toggle the indicator between
the normal gross display and the net display with
the tare annunciator activated.
The tare function allows an operator to quickly zero
the indicator display at any input current so that
subsequent readings only show the change in
input since the
P push-button was operated. For
example when used with a weighing system, it
allows the weight of a container to be automatically
subtracted from the total gross weight so that only
the net weight of the contents is displayed.
8.5 Display backlight
The BA524D can be supplied with LED
backlighting to improve display contrast when the
indicator is installed in poorly illuminated areas.
The backlight is electrically isolated from the
measuring circuit and may be powered from any 18
to 30V dc supply. The backlight brilliance may be
reduced by reducing the supply voltage below 18V,
or by fitting a current limiting resistor in series with
the supply.
Fig 15 Backlight powered by Zener barrier
8.6 External switches
For applications requiring frequent access to the
programme menus the BA524D can be supplied
with an external membrane keypad. These
switches, which maintain the IP66 integrity, allow
all functions to be controlled without removing
either of the enclosure covers.
8.7 Pipe mounting kits
Two pipe mounting kits are available for securing
the BA524D to a horizontal or vertical pipe.
BA392D Stainless steel bracket secured by two
worm drive hose clips. Will clamp to
any pipe with outside diameter between
60 and 80mm.
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.
8.8 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. Primarily intended for use
with flow transmitters, the kit enables the BA524D
indicator to be mounted directly onto the
transmitter.
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