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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, a full
battery charge can be'expected to supply about
5 hours of accumulated working time.
2. The Calculator may be used while its battery is
charging.
3. Batteries that have been neither used nor charged
for as long as 2 or 3 months will suffer substantial
loss of operating time through a tendency to
self-discharge. As a general rule, batteries lose
about 1% charge per day due to self-discharge,
at normal temperatures.
4. For optimum performance and long life;
a. Alternate frequently between Battery and
ACpower.
b. Operate at or near normal room temperatures.
c. Charge as soon as possible upon appearance
of the Low-Battery indicator.
5. Recharge time is 7 hours for a fUlly discharged
battery, with
the
calculator
off.
6. The LOW-Battery indicator is designed to appear
as soon as battery voltage drops to the lowest
value that will support optimum performance of
the Calculator. Should further discharge occur,
through continued operations or self-discharge.
the Low-Battery indicator may fail
to
appear.
Do not continue to operate on batteries when
this condition is noted. or a damaged battery
may result.
7. As a general rule, if improper operation occurs.
first try the Calculator with its charger connected.
If operation is then normal, this indicates the
batteries are low.
8. Do not store the unit in high temperature areas
such as the top of radiators or the rear deck of
automobiles exposed to the sun. The Calculator
will operate satisfactorily over an ambient tem-
perature range of
O·
to 50°C (32° to 122°F) and
relative humidity to 95%.
6
7
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