Texas Instruments TI-30XIIB Owners Manual - Page 11

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Automatic Turn-Olt Electronic control (as opposed to switch control) of ON arid OFF, allows the calculator to minimize power consumption by displaying a number for only a limited length of time. The display reverts to a traveling decimal point after typically 25 to SO seconds of nonuse. As soon as any key is pressed, the display is restored The safest method of reactivating the display is to press )13Ecd twice. This insures that calculations in progress are not affected and that processing continues as though nothing had happened to the display. The benefit is a substantial increase in the operating life of your battery. If not interrupted, the traveling decimal display continues for a period of 7 to 14 minutes then automatically turns the calculator completely off. Data Entry For maximum versatility, your calculator operates with a floating decimal point When entering numbers. the decimal remains to the right of the mantissa untilFA is pressed. Then the fractional part of the number is entered and the decimal point floats with the entered number. o I through [13 Digit Keys - Enter numbers 0 through 9. Decimal Point Key - Enters a decimal point. Fr-7 Change Sign Key - When pressed after number entry or a calculation. changes the sign of the displayed number. The sign of the exponent is changed when this key is pressed after the RTC key. I Pi Key -Enters the value of pi correct to 11 digits. (This value is rounded to 8 digits for display.) 9

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Automatic
Turn
-Olt
Electronic
control
(as
opposed
to
switch
control)
of
ON
arid
OFF,
allows
the
calculator
to
minimize
power
consumption
by
displaying
a
number
for
only
a
limited
length
of
time.
The
display
reverts
to
a
traveling
decimal
point
after
typically
25
to
SO
seconds
of
nonuse.
As
soon
as
any
key
is
pressed,
the
display
is
restored
The
safest
method
of
reactivating
the
display
is
to
press
)13Ecd
twice.
This
insures
that
calculations
in
progress
are
not
affected
and
that
processing
continues
as
though
nothing
had
happened
to
the
display.
The
benefit
is
a
substantial
increase
in
the
operating
life of
your
battery.
If
not
interrupted,
the
traveling
decimal
display
continues
for
a
period
of
7
to
14
minutes
then
automatically
turns
the
calculator
completely
off.
Data
Entry
For
maximum
versatility,
your
calculator
operates
with
a
floating
decimal
point
When
entering
numbers.
the
decimal
remains
to
the
right
of
the
mantissa
until
FA
is
pressed.
Then
the
fractional
part
of
the
number
is
entered
and
the
decimal
point
floats
with
the
entered
number.
o
I
through
[13
Digit
Keys
—
Enter
numbers
0
through
9.
Decimal
Point
Key
-
Enters
a
decimal
point.
Fr
-7
Change
Sign
Key
-
When
pressed
after
number
entry
or
a
calculation.
changes
the
sign
of
the
displayed
number.
The
sign
of
the
exponent
is
changed
when
this
key
is
pressed
after
the
RTC
key.
I
Pi
Key
-Enters
the
value
of
pi
correct
to
11
digits.
(This
value
is
rounded
to
8
digits
for
display.)
9