Special Battery-Saver Feature
If
you
do
not
actuate
the
keyboard
for
approx-
imately
30
seconds
while
performing
a
calculation,
the
display
will
turn
off
automatically,
leaving
only
the
"Time-Out
Indicator",
previously
described,
on.
This
feature
decreases
unnecessary
power
consumption,
and
extends
battery
life
between
charges.
The
displayed
information
can
be
recalled
by
touching
the
!it
key
once,
The
information
or
function
mode
Will
not
be
affected.
Overflow
indicator
Indicates
a
calculation
result
that
contains
more
than
ten
digits.
Appears
as
Note;
A
negative
result
of
more
than
ten
digits
can
indicate
overflow
as
,'\0
BATTERY
NOTES
1.
With normal use
at
room temperature, afull
batterycharge can be'expected to supplyabout
5hours
of
accumulated working time.
2.
The Calculator may be used whileits battery is
charging.
3.
Batteriesthat have been neitherused
nor
charged
for
as
long
as
2
or
3monthswill suffersubstantial
loss
of
operating time through atendency to
self-discharge.
As
ageneral rule, batteries lose
about
1%
charge perday due to self-discharge,
atnormal temperatures.
4.
For optimumperformance and long life;
a.
Alternate frequentlybetween Batteryand
ACpower.
b.
Operate at
or
nearnormal room temperatures.
c.
Charge
as
soon
as
possible uponappearance
of
the Low-Battery indicator.
5.
Recharge time is 7hours for afUlly discharged
battery, with the calculator off.
6.
The LOW-Battery indicatorisdesigned to appear
as
soon
as
batteryvoltagedrops to the lowest
value thatwill supportoptimum performance
of
the Calculator.Should furtherdischargeoccur,
through continued operations
or
self-discharge.
the Low-Batteryindicatormay fail
to
appear.
Do notcontinueto operate on batteries when
thiscondition is noted.
or
adamaged battery
may result.
7.
As
ageneral rule, if improperoperation occurs.
first try theCalculatorwith its charger connected.
Ifoperation is then normal, this indicates the
batteriesare low.
8.
Do notstore the unitin hightemperature areas
such
as
thetop
of
radiators
or
the reardeck
of
automobilesexposed to the sun. The Calculator
will operatesatisfactorilyover
an
ambient tem-
perature range of
O·
to
50°C (32°
to
122°F) and
relative humidity
to
95%.
67
