TnB
ErBcrRrcAL
SYsrru.
Normally
it
should never
be
necessary
to add sulphuric
acid
to the
cells,
unless
it is
definitely
known
that
some
of
the
acid has
been
lost
owing
to
slopping or spilling.
The addition
of
acid
to
the battery
should
only
be done
by an experienced
battery
man,
who
at the
same
time
will
carry
out any adjustments to
the acid
gravity.
Specific
Gravity of
Electrolyte.
Various
acid specific
gravity
figures are
given
for
reference in
the
following table,
and
they
apply to both makes of
batteries.
Acid
gravity
figures are
taken by
means
of
an hydrometer.
Specific
Gravity
of
Sulphuric Acid
Solution.
(Corrected
to
7o'
F.).
9r
Filling
in
for
First
Charge.
F ully
Charged.
Climate.
Temperate
Tropical
(i.".
where the
temperature is frequently
9oo
F. or over).
6 HZP1-S
6 MXP9R
r.z6o
r.r90
t.z8o
(r.z7o-r.285\
T.2TO
(t.zoo-r.zr5)
Charg ing.
The
output of the dynamo
on
the
car is controlled
so as to vary
with
the state
of charge
of
the
battery.
Overcharging
the
battery is
thus
automatically
avoided. The dynamo will, under
ordinary running
conditions,
provide
enough
current to ensure
re-charging of
the
battery,
but
in special cases,
e.9.,
when the
car is frequently standing with the
lights
on
and daylight
running
is of short
duration,
it
may
be
necessary
to take
the
battery off the car
from
time to time
for a
bench
re-charge.
This re-charge
can be done
by any well-equipped service
station.
-
Ghanging Battery
from an
outside
source,
It is possible
to
charge the
battery from a trickle
charger
whilst
in position on
the
car,
making
use of a
flexible lead and the special
two-pin
plug supplied,
which
fits
the
charging
plug
socket on the facia
board
arranged
just
above the
steering column.
Be certain that the direction
of
current
is correct, the socket
holes
are marked
*
and
respectively, and,
in
addition,
are
made
of
different
sizes
in
order to
clearly
distinguish
them.
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