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double-function
key,
and it is
required
to
depress this key after
entry
of
a and
again after
entry
of
x.
x
can be
any
real
number,
and
a can
be any positive real number
.
II
Square Key
Used for finding a
square of
the displayed
conten ts.
a
Square Root Key
Used for finding
a square
ro
ot
of the displayed
con ten ts.
a
Cube Root Key
Used
for
finding
a cube
root of the displayed
con ten ts.
I!
Decimal Degree Key
Used
for
conve
rti
ng
a
value
in
degree/
minute
/
second into a value
in
decimal degree. A
value to be converted
shou
Id be entered as
x
x.
yy
zz (x
,
degree;
y,
minute;
z,
second).
!:i
Degree Key
Used for converting
a value in
radian into
a
value
in degree
.
f!
Radian Key
Used for converting
a value in
degree
into a
value
in
radi
an.
I!
Rectangular Key
Used for converting
rand
e
of polar coordi-
nates into
x
and
y
of
rectangular
coordinates.
Depress this key
afte
r
entry
of
r
and then enter
e
and depress this
key again
to find
x;
depress
this
key once more again to find
y
.
~
Polar K
ey
Used for converting
x
and
y
of rectangular
coordinates into rand
e
of polar
coordinates.
Depress this key
after entry of
x
and
then enter
y
and depress this key again to find r; depress
this key
once
more again to find
B.
~L'
Round-Off Switch
~
..
Used for round-up, round
-off
or round-down to
the preselected decimal digits of
t
he
results.
Rounding is performed, according to
desig-
nation, at the
stage of obtaining
the final
result.
Set the
switch to
the left
for rounding up,
to
th
e
center for rounding off,
and
to the right
for rounding down
_
•
Decimal Point Selector
Used for designating the decimal point position
in the calculation
result.
D
esignated sett ings are
0,
1, 2, 3, 4, 5, 6
and
F (floating) positions
below the decimal
point.
OV~t"'"
Overflow L
am
p
Lights
up
in
the following
cases,
preventing
further entries or calculations.
(1) When the entered numeral overflows:
Lights
up
when
the 13th digit
is
entered.
Depress the
II
key
to
shift
down by 1
digit and resume calculation.
(2)
When double
entry is mistaken
l
y made:
Depress
the
II
key
to sh
i
ft down by
digit and make a
re-entry.
(3) When the calculation result overflows:
The overflow
lamp lights
up when the
integers of the
results
exceeds the 12th
digit. In this case, clear
with
the
@]
key.
(4) When the memory overflows:
The overflow I
amp
I
ights up when
the
integers of .the
memory content exceeds
the
12th digit. In
this
case,
clear
with the
§]
key
o
Memory Lamp
Thi
s lamp
lights up when data is entered in the
memory and indicates that the memory
is
in
use_
c::J
Minus Sign
This
sign is
displayed immediately in
front
of
the
displayed
numeral
when
it becomes a
negative
number.
When the full 12 digits
are
displayed, the minus
sign is
indicated
at
the right-most of the display
panel; when the number of display digits is less
than 12, the minus
sign
is displayed floatingly
just before the displayed figure.
(J
3--Digit Automatic Punctuation
Lamps
They automatically light
to
mark off displayed
figures
into
groups of 3 digits,
starting
from
the
decimal
point.
"'\
-'
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