INTRODUCTION
About operation examples, please refer to the attached sheet.
Refer to the number on the right of each title for use.
After reading this manual, store it in a convenient location for future
reference.
Operational Notes
To ensure troublefree operation, please observe the following
points:
1. Do not carry the calculator in the back pocket of slacks or
trousers.
2. Do not subject the calculator to extreme temperatures.
3. Do not drop it or apply excessive force.
4. Clean only with a soft, dry cloth.
5. Do not use or store the calculator where fluids can splash onto it.
o
Press the RESET switch only in the following cases:
• When using for the first time
• After replacing the batteries
• To clear all memory contents
• When an abnormal condition occurs and all keys are inopera
tive.
If service should be required on this calculator, use only a SHARP
servicing dealer, SHARP approved service facility, or SHARP re
pair service where available.
Hard Case
DISPLAY
Equation
Display
Symbol
Mantissa
Exponent
(During actual use not all symbols are displayed at the same time.)
If the value of mantissa does not fit within the range ±0.000000001
– ±9999999999, the display changes to scientific notation. The
display mode can be changed according to the purpose of the
calculation.
/
: Appears when the entire equation cannot be displayed.
Press
<
/
>
to see the remaining (hidden) section.
xy
/
r
θ
: Indicates the mode of expression of results in the com
plex calculation mode.
2ndF
: Appears when
@
is pressed, indicating that the func
tions shown in orange are enabled.
HYP
: Indicates that
h
has been pressed and the hyperbolic
functions are enabled. If
@
H
are pressed, the
symbols “2ndF HYP” appear, indicating that inverse hy
perbolic functions are enabled.
ALPHA: Indicates that
@
K
or
O
(
R
) has been
pressed, and entry (recall) of memory contents and recall
of statistics can be performed.
FIX/SCI/ENG: Indicates the notation used to display a value and
changes each time
@
f
are pressed.
DEG/RAD/GRAD: Indicates angular units and changes each time
G
is pressed.
STAT
: Appears when statistics mode is selected.
M
: Indicates that a numerical value is stored in the inde
pendent memory.
: Appears when the calculator shows the angle as a result
in the complex calculation mode.
i
: Indicates an imaginary number is being displayed in the
complex calculation mode.
BEFORE USING THE CALCULATOR
Key Notation Used in this Manual
In this manual, key operations are described as follows:
e
x
XE
To specify
e
x
:
@e
ln
To specify E (HEX) : E
To specify ln
:
I
To specify X
:
@KX
Functions that are printed in orange above the key require
@
to
be pressed first before the key. Numbers are not shown as keys,
but as ordinary numbers.
Power On and Off
Press
ª
to turn the calculator on, and
@ F
to turn it off.
Clearing Methods
There are three clearing methods as follows:
Clearing
Entry
M*
1
AD, X,Y*
2
operation
(Display)
STAT, ANS
ª
×
×
@c
×
RESET
: Clear
×
: Retain
*
1
Independent memory M.
*
2
Temporary memories AD, X and Y, statistical data, and last an
swer memory.
Editing the Equation
• Press
<
or
>
to move the cursor. You can also return to
the equation after getting an answer by pressing
>
(
<
).
See below for Multiline playback function.
• If you need to delete a number, move the cursor to the number
you wish to delete then press
d
.
The number under the cursor will be deleted.
• If you need to insert a number, move the cursor to the place
immediately after where you wish to insert the number then enter
the number.
Multiline Playback function
(1)
This calculator is equipped with a function to recall previous equa
tions. Equations also include calculation ending instructions such
as “=” and a maximum of 142 characters can be stored in memory.
When the memory is full, stored equations are deleted in the order
of the oldest first. Pressing
[
will display the previous equation
and the answer. Further pressing
[
will display preceding equa
tions (after returning to the previous equation, press
]
to view
equations in order). In addition,
@[
can be used to jump to
the oldest equation.
• The multiline memory is cleared by the following operations:
@c
,
@F
(including the Automatic Power Off fea
ture), mode change, RESET,
@`
,
@?
, constant
calculation, angle conversion/change, Nbase conversion, coor
dinate conversion, numerical value storage to the temporary
memories and independent memory, and input/deletion of statis
tical data.
Priority Levels in Calculation
This calculator performs operations according to the following pri
ority:
1
∠
2
Functions preceded by their argument (x
1
, x
2
, n!, etc.)
3
Y
x
,
x
¿
4
Implied multiplication of a memory value (2Y, etc.)
5
Functions followed by their argument (sin, cos, etc.)
6
Implied
multiplication of a function (2sin30, etc.)
7
n
C
r
,
n
P
r
8
×
, ÷
9
+, –
F
AND
G
OR, XOR, XNOR
H
=, M+, M–,
⇒
M,

DEG,

RAD,

GRAD, DATA, CD,
→
r
θ
,
→
xy and other calculation ending in
struction
• If parentheses are used, parenthesized calculations have prec
edence over any other calculations.
SCIENTIFIC CALCULATIONS
• Press
@
m
0
to select the normal mode.
• In each example, press
ª
to clear the display. And if the FIX,
SCI, or ENG indicator is displayed, clear the indicator by press
ing
@
f
.
Arithmetic Operations
(2)
• The closing parenthesis
)
just before
=
or
;
may be
omitted.
Constant Calculations
(3)
• In the constant calculations, the addend becomes a constant.
Subtraction and division are performed in the same manner. For
multiplication, the multiplicand becomes a constant.
• When performing calculations using constants, constants will be
displayed as K.
Functions
(4)
• Refer to operation examples of each function.
• Before starting calculation, specify the angular unit.
• The results of inverse trigonometric functions are displayed within
the following range:
Random Numbers
A pseudorandom number with three significant digits can be gen
erated by pressing
@`=
. To generate the next random
number, press
=
. You can perform this function in the normal
and statistics modes. (You cannot perform this function while you
are using the NBase function.)
• Random numbers use memory Y. Each random number is gen
erated on the basis of the value stored in memory Y (pseudo
random number series).
Angular Unit Conversions
(5)
Each time
@g
are pressed, the angular unit changes in
sequence.
Memory Calculations
(6)
This calculator has 6 temporary memories (AD, X and Y), one
independent memory (M) and one last answer memory (ANS).
COMPLEX NUMBER CALCULATIONS
(13)
To carry out addition, subtraction, multiplication, and division using com
plex numbers, press
@m1
to select the complex number
mode.
There are two modes of expression of the results of complex number calcula
tions.
1
Rectangular coordinate mode. (
xy
appears on the display.)
@}
2
Polar coordinate mode. (r
θ
appears on the display.)
@{
Complex number entry
1
Rectangular coordinates
xcoordinate
+
ycoordinate
Ü
or xcoordinate
+
Ü
ycoordinate
2
Polar coordinates
r
Ö
θ
r: absolute value
θ
: argument
• Upon changing to another mode, the imaginary portion of any
complex number stored in the independent memory (M) will be
cleared.
• A complex number expressed in rectangular coordinates with
the yvalue equal to zero, or expressed in polar coordinates with
the angle equal to zero, is treated as a real number.
STATISTICAL CALCULATIONS
Statistical calculations are performed in the statistics mode. Press
@m2
to select the statistics mode. This calculator per
forms the seven statistical calculations indicated below. After se
lecting the statistics mode, select the desired submode by press
ing the number key corresponding to your choice.
When changing to the statistical submode, press the correspond
ing number key after performing the operation to select the statis
tics mode (press
@m2
).
0
(STAT 0) : Singlevariable statistics
1
(STAT 1) : Linear regression calculation
2
(STAT 2) : Quadratic regression calculation
3
(STAT 3) : Exponential regression calculation
4
(STAT 4) : Logarithmic regression calculation
5
(STAT 5) : Power regression calculation
6
(STAT 6) : Inverse regression calculation
Entered data are kept in memory until
@
c
or
@
m
2
are pressed. Before entering new data, clear the memory
contents.
[Data Entry]
Singlevariable data
Data
k
Data
&
frequency
k
(To enter multiples of the same
data)
Twovariable data
Data
x
&
Data
y
k
Data
x
&
Data
y
&
frequency
k
(To enter multiples
of the same data
x
and
y
.)
[Data Correction]
Correction prior to pressing
k
:
Delete incorrect data with
ª
.
Correction after pressing
k
:
Press
>
to confirm the latest entry and press
@
J
to
delete it.
Statistical Calculation Formulas
(17)
Refer also to the operation examples sheet.
In the statistical calculation formulas, an error will occur when:
• the absolute value of the intermediate result or calculation result
is equal to or greater than 1
×
10
100
.
• the denominator is zero.
• an attempt is made to take the square root of a negative number.
• no solution exists in the quadratic regression calculation.
ENGLISH
EL520VA
SCIENTIFIC CALCULATOR
OPERATION MANUAL
MODEL
DEG (
°
)
GRAD (g)
RAD (Radians)
Press
G
Modify Function
(12)
In this calculator, all calculation results are internally obtained in
scientific notation with up to 12 digits for the mantissa. However,
since calculation results are displayed in the form designated by
the display notation and the number of decimal places indicated,
the internal calculation result may differ from that shown in the
display. By using the modify function, the internal value is con
verted to match that of the display, so that the displayed value can
be used without change in subsequent operations.
INITIAL SETUP
Mode Selection
Normal mode (NORMAL):
@m0
Used to perform arithmetic operations and function calculations.
Complex number mode (CPLX):
@m1
Used to perform arithmetic operations with complex numbers.
Statistic mode (STAT):
@m2
Used to perform statistical calculations.
When executing mode selection, temporary memories, statistical
data and last answer memory will be cleared even when reselecting
the same mode.
π
2
π
2
θ
= sin
–1
x
,
θ
= tan
–1
x
θ
= cos
–1
x
DEG
–90
≤
θ
≤
90
0
≤
θ
≤
180
RAD
– —
≤
θ
≤
—
0
≤
θ
≤
π
GRAD
–100
≤
θ
≤
100
0
≤
θ
≤
200
Mode
ANS
M
AD, X,Y
Normal
Complex
×
Statistic
×
×
: Available
×
: Unavailable
↔
Rectangular coord.
Polar coord.
• The calculation result is automatically stored in memories X and Y.
Value of
r
or
x
: X memory
Value of
θ
or
y
: Y memory
ERROR AND CALCULATION RANGES
Errors
An error will occur if an operation exceeds the calculation ranges,
or if a mathematically illegal operation is attempted. When an error
occurs, pressing
<
(or
>
) automatically moves the cursor
back to the place in the equation where the error occurred. Edit the
equation or press
ª
to clear the equation.
Error Codes and Error Types
Syntax error (Error 1):
•

An attempt was made to perform an invalid operation.
Ex. 2
@{
Calculation error (Error 2):
•
The absolute value of an intermediate or final calculation result equals
or exceeds 10
100
.
•
An attempt was made to divide by 0.
•
The calculation ranges were exceeded while performing calculations.
Depth error (Error 3):
•
The available number of buffers was exceeded. (There are 8 buffers*
for numeric values and 16 buffers for calculation instructions). *4
buffers in STAT and the complex number mode.
Equation too long (Error 4):
•
The equation exceeded its maximum input buffer (142 characters).
An equation must be shorter than 142 characters.
[Temporary memories (AD, X and Y)]
A stored value can be recalled as a value or variable for the use in
equations.
• In case you store an infinite decimal in the memory, recall it as a
variable to obtain accurate answers.
Ex.)
1
/
3
O
Y
(0.3333...is stored to Y)
3
*
R
Y
=
0.999999999
3
*
@
K
Y
=
1.
[Independent memory (M)]
In addition to all the features of temporary memories, a value can
be added to or subtracted from an existing memory value.
[Last answer memory (ANS)]
The calculation result obtained by pressing
=
or any other
calculation ending instruction is automatically stored in the last
answer memory.
Note:
Calculation results from the functions indicated below are auto
matically stored in memories X or Y. For this reason, when using
these functions, be careful with the use of memories X and Y.
•
Random numbers .................. Y memory
•
→
r
θ
,
→
xy ............................... X memory, Y memory
Temporary memories and last answer memory are cleared even
when the same mode is reselected.
Chain Calculations
(7)
This calculator allows the previous calculation result to be used in
the following calculation.
The previous calculation result will not be recalled after entering
multiple instructions.
Fraction Calculations
(8)
This calculator performs arithmetic operations and memory calcu
lations using a fraction, and conversion between a decimal number
and a fraction.
• In all cases, a total of up to 10 digits including integer, numera
tor, denominator and the symbol (
l
) can be entered.
• If the number of digits to be displayed is greater than 10, the
number is converted to and displayed as a decimal number.
• A decimal number, variable, or exponent cannot be used in a
fraction.
Binary, Octal, Decimal, and Hexadecimal Operations
(NBase)
(9)
This calculator can perform conversions between numbers ex
pressed in binary, octal, decimal and hexadecimal systems. It can
also perform the four basic arithmetic operations, calculations with
parentheses and memory calculations using binary, octal, decimal,
and hexadecimal numbers. In addition, the calculator can carry out
the logical operations AND, OR, NOT, NEG, XOR and XNOR on
binary, octal and hexadecimal numbers.
Conversion to each system is performed by the following keys:
@ê
: Converts to the binary system. “ ” appears.
@î
: Converts to the octal system. “
” appears.
@ì
: Converts to the hexadecimal system.“ ” appears.
@í
: Converts to the decimal system. “ ”, “
”, and “ ”
disappear from the display.
Conversion is performed on the displayed value when these keys
are pressed.
Note: In this calculator, the hexadecimal numbers A – F are entered
by pressing
™
,
⁄
,
É
,
é
,
ç
, and
å
,
and displayed as follows:
A
→
ï
, B
→
∫
, C
→
ó
, D
→
ò
, E
→
ô
, F
→
ö
In the binary, octal, and hexadecimal systems, fractional parts can
not be entered. When a decimal number having a fractional part is
converted into a binary, octal, or hexadecimal number, the fractional
part will be truncated. Likewise, when the result of a binary, octal, or
hexadecimal calculation includes a fractional part, the fractional part
will be truncated. In the binary, octal, and hexadecimal systems,
negative numbers are displayed as a complement.
Time, Decimal and Sexagesimal Calculations
(10)
Conversion between decimal and sexagesimal numbers can be
performed. In addition, the four basic arithmetic operations and
memory calculations can be carried out using the sexagesimal
system.
The following statistics can be obtained for each statistical calcula
tion (refer to the table below):
Singlevariable statistical calculation
(14)
Statistics of
1
Linear regression calculation
(15)
Statistics of
1
and
2
and, in addition, estimate of
y
for a given
x
(estimate
y´
) and estimate of
x
for a given
y
(estimate
x´
)
Exponential regression, Logarithmic regression,
Power regression, and Inverse regression calculation
Statistics of
1
and
2
. In addition, estimate of
y
for a given
x
and
estimate of
x
for a given
y
. (Since the calculator converts each
formula into a linear regression formula before actual calculation
takes place, it obtains all statistics, except coefficients
a
and
b
,
from converted data rather than entered data.)
Quadratic regression calculation
(16)
Statistics of
1
and
2
and coefficients
a
,
b
,
c
in the quadratic
regression formula (
y
=
a
+
bx
+
cx
2
). (For quadratic regression
calculations, no correlation coefficient (
r
) can be obtained.) When
there are two
x´
values, press
@≠
.
When performing calculations using a, b and c, only one numeric
value can be held.
BATTERY REPLACEMENT
Notes on Battery Replacement
Improper handling of batteries can cause electrolyte leakage or
explosion. Be sure to observe the following handling rules:
• Replace both batteries at the same time.
• Do not mix new and old batteries.
• Make sure the new batteries are the correct type.
• When installing, orient each battery properly as indicated in the
calculator.
When to Replace the Batteries
If the display has poor contrast or nothing appears on the display
even when
ª
is pressed in dim lighting, it is time to replace the
batteries.
PRINTED IN CHINA / GEDRUCKT IN CHINA
01CUP (TINSZ0468EHZZ)
EL520VA (Z0468E)_ENGLISH_1
Coordinate Conversions
(11)
• Before performing a calculation, select the angular unit.
↔
P (
x
,
y
)
X
Y
0
y
x
P (
r
,
θ
)
X
Y
0
r
θ
x
Mean of samples (
x
data)
sx
Sample standard deviation (
x
data)
1
σ
x
Population standard deviation (
x
data)
n
Number of samples
Σ
x
Sum of samples (
x
data)
Σ
x
2
Sum of squares of samples (
x
data)
y
Means of samples (
y
data)
sy
Sample standard deviation (
y
data)
σ
y
Population standard deviation (
y
data)
Σ
y
Sum of samples (
y
data)
2
Σ
y
2
Sum of squares of samples (
y
data)
Σ
xy
Sum of products of samples (
x
,
y
)
r
Correlation coefficient
a
Coefficient of regression equation
b
Coefficient of regression equation
c
Coefficient of quadratic regression equation
1
x
Type
Regression formula
Linear
y
=
a
+
bx
Exponential
y
=
a
•
e
bx
Logarithmic
y
=
a
+
b
• ln
x
Power
y
=
a
•
x
b
Inverse
y
=
a
+
b
—
Quadratic
y
=
a
+
bx
+
cx
2
Caution
• Keep batteries out of the reach of children.
• Exhausted batteries left in the calculator may leak and damage
the calculator.
• Explosion risk may be caused by incorrect handling.
• Batteries must be replaced only with others of the same type.
• Do not throw batteries into a fire as they may explode.
Replacement Procedure
1. Turn the power off by pressing
@
F
.
2. Remove two screws. (Fig. 1)
3. Slide the battery cover slightly and lift it to remove.
4. Remove the used batteries by prying them with a ballpoint pen
or other similar pointed device. (Fig. 2)
5. Install two new batteries. Make sure the “+” side facing up.
6. Replace the cover and screws.
7. Press the RESET switch (on the back).
• Make sure that the display appears as shown below. If the
display does not appear as shown, remove the batteries reinstall
them and check the display once again.
(Fig. 1)
(Fig. 2)
Automatic Power Off Function
This calculator will turn itself off to save battery power if no key is
pressed for approximately 10 minutes.
SPECIFICATIONS
Calculations:
Scientific calculations, complex number
calculations, statistical calculations, etc.
Internal calculations:
Mantissas of up to 12 digits
Pending operations:
16 calculations 8 numeric values
(4 numeric values in STAT and complex
number mode)
Power source:
Builtin solar cells
3V
¶
(DC):
Backup batteries (Alkaline batteries (LR44)
×
2)
Operating temperature:
0°C – 40°C (32°F – 104°F)
External dimensions:
78.6 mm (W)
×
152 mm (D)
×
10.5 mm (H)
33/32” (W)
×
531/32” (D)
×
13/32” (H)
Weight:
Approx. 78 g ( 0.172 lb)
(Including batteries)
Accessories:
Batteries
×
2 (installed), operation
manual, operation examples sheet, quick
reference card and hard case
FOR MORE INFORMATION ABOUT THIS
CALCULATOR
Visit our Web site.
http://sharpworld.com/calculator/
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
A
B
Calculation Ranges
(18)
Refer also to the operation examples sheet.
• Within the ranges specified, this calculator is accurate to ±1 in
the least significant digit of the mantissa. When performing con
tinuous calculations (including chain calculations), errors accu
mulate leading to reduced accuracy.
• Calculation ranges
±10
99
– ±9.999999999
×
10
99
and 0.
If the absolute value of an entry or a final or intermediate result of a
calculation is less than 10
–99
, the value is considered to be 0 in
calculations and in the display.
Selecting the Display Notation and Decimal Places
The calculator has four display notation systems for displaying
calculation results. When FIX, SCI, or ENG symbol is displayed,
the number of decimal places can be set to any value between 0
and 9. Displayed values will be reduced to the corresponding
number of digits.
100000÷3=
[Floating point]
ª
100000
/
3
=
33333.33333
→
[FIXed decimal point]
@f
33333.33333
[TAB set to 2]
@i
2
33333.33
→
[SCIentific notation]
@f
3.33
×
10
4
→
[ENGineering notation]
@f
33.33
×
10
3
→
[Floating point]
@f
33333.33333
• If the value for floating point system does not fit in the following
range, the calculator will display the result using scientific notation
system:
0.000000001
≤

x

≤
9999999999
Determination of the Angular Unit
In this calculator, the following three angular units can be speci
fied.