Heathkit IM-4180 - Page 14

Page 51
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PICTORIAL 8-2
BATTERY ae
CHARGER/ELIMINATOR J
IMA-4180-1
BATTERY CARE AND CHARGING
Refer
to
Pictorial
8-2
as
you
read
the
following
information.
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As explained in
a! (piained
rechargeable
nickelcadmicmn
(Nicad)
batteries
nay
be
recharged.
If
you
do
not
have
rechargeable
batteries
in
your
Deviation
Meter,
you
may
omit
reading
this
section.
If
you
do
have
them,
and
donct
keep
your
Battery
Charger/Eliminator
Accessory
connected
to
the
Deviation
Meter
at
all
times,
you
quently
check
the
condition
of
your
battery
should ireque
pack. When the meter reading indicates that the
battery
energy
is
low,
just
plug
the
Battery
Charger/Eliminator
Accessory
into
the
Deviation
shallow
discharges,
and
by
minimizing
overcharges
and
heat.
Meter
rear
panel
15
VDC
jack,
plug
the
Charger
into
an
AC
outlet,
and
charge
the
batteries
for
several
hours.
To
check
the
condition
ofr
ctatea
af
charaa
an
tha
MEO
NARS
NAANS
SONPAASAAR
RES
UE
OGL
Ul
UGS
ULE
LL
batteries
alone,
the
Charger
must
be
temporarily
dis-
connected
from
the
Meter.
Nickel-cadmium
(NICAD)
batteries
are
sealed,
and
contain
no
free
electrolyte.
+
r
s
will
retain
about
50%
of
their
charge
for
three
months.
However,
a
few
charge
and
discharge
cycles
will
restore
their
full
capacity.
To
increase
their
charge
time,
store
the
bat-
teries
at
low
temperatures.
High
temperatures
de-
crease
their
life.
The
useful
life
of
a
NICAD
is
from
300
to
1000
charge
and
discharge
cycles.
You
can
extend
its
life
with
shallow
discharges,
and
by
minim
and heat.
cycles.
This
is
known
as
the
“memory”
or
‘“hys-
teresis’”
effect
and
can
ue
romeaie
d
ae
a
few
deep
rannndattianing oxvyele
reconaiuoning cCycies.
a
charge
it
to
1.0
volts
at
a
rate
‘of
36
sae
oe
Then
re-
charge it at a rate of 360 mA for 14 to 16 hours.
When
a
cell
is
discharged
to
less
than
1.0
volt,
the