7
WARNING
Only BA491 batteries should be fitted.
No attempt should be made to
recharge or to open the battery
assembly.
The discharged battery may be removed and
the replacement fitted while the BA544D rate
totalisers is in situ. Fig 5 together with the
following notes illustrate the replacement
sequence:
a.
If the instrument has an external
keypad, remove the switch cover by
unscrewing the two ‘C’ screws and
unplug the ribbon cable from the outer
row of pins.
b.
CAUTION
The total and grand total are
automatically stored in
permanent memory once
every hour. If the instrument
is still operational i.e. has a
display other than ‘bAtt’,
turning the instrument off
may result in up to 59 minutes
of flow being lost from these
displays.
Entering and leaving the
programme menu by pressing
P and E followed by E, will
force the BA544D to
immediately store the totals in
permanent memory thus
preventing data loss.
Remove the terminal cover by
unscrewing the two ‘A’ screws and turn
the instrument OFF by moving the
slide switch to the left – see Figs 3 & 4.
c.
Remove the four ‘D’ screws and lift-off
the front of the enclosure.
d.
Remove the two ‘E’ screws securing
the BA491 battery and gently pull the
battery away from the instrument
printed circuit board – see Fig 5.
e.
Before installing a replacement BA491
battery it should be conditioned to
remove the oxide layer that forms on
the internal electrodes, please see
instruction sheet supplied with each
replacement BA491. Battery
conditioning is also described in
Appendix 1.
f.
Plug the replacement BEKA BA491
battery into the instrument. Ensure
that the two pins on the instrument
printed circuit board are correctly
aligned with the socket on the battery
and then replace the two ‘E’ screws.
g.
Reassemble the instrument enclosure.
Before replacing the terminal cover
turn the instrument ON by moving the
slide switch to the right.
Fig 5 Replacement of internal battery
4.5 Disposal of used batteries
The BEKA BA491 battery contains
Lithium
Thionyl Chloride cells that should not be
included with standard industrial waste. Do not
incinerate.
More information about disposal is available
from The British Battery Manufacturers
Association
www.rebat.com
Summary of Contents for BA544D
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