5
Fig 3 Remote indication from a flowmeter
3.3 Reset terminals
The BA558C total display may be reset to zero by
connecting a switch between reset terminals RS1
and RS2 as shown in Fig 3. There is no practical
limit on the distance that the reset switch may be
from the rate totaliser.
Alternatively, the BA558C may be programmed so
that the total display is reset to zero when the Up
and Down push-buttons are operated
simultaneously for two seconds.
4. INSTALLATION
4.1 Location
The BA558C rate totaliser is housed in a robust
aluminium enclosure with a polyester membrane
front panel surrounded by a Noryl bezel. The front
of the instrument provides IP65 protection, and a
gasket seals the joint between the instrument
enclosure and the panel. The instrument may be
installed in any panel providing the environmental
limits shown in the specification are not exceeded.
Fig 4 shows the overall dimensions of the BA558C
and the panel cut-out. To achieve an IP65 seal
between the instrument enclosure and the panel
the smaller cut-out must be used and the
instrument secured with four panel mounting clips.
The BA558C liquid crystal display has maximum
contrast when viewed from directly ahead and
slightly below the centre line of the instrument. For
reflective displays there is little degradation of
contrast when viewed from above the centre line,
but slight degradation may be noticeable when the
instrument is fitted with a backlight.
Fig 4 BA558C dimensions
