Sharp Calculator 531W User Manual

ENGLISH  
: Appears when the entire equation cannot be displayed.  
/
Press </> to see the remaining (hidden) section.  
: Indicates that data can be visible above/below the screen.  
These indications may appear when menu, multi-line play-  
back, and statistics data are displayed. Press [/]  
to scroll up/down the view.  
SCIENTIFIC CALCULATOR  
EL-509W  
EL-531W  
EL-531WG  
EL-531WH  
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.  
MODEL  
OPERATION MANUAL  
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA  
04LGK (TINSE0706EH02)  
ALPHA: Indicates that K (STAT VAR), O or 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  
INTRODUCTION  
changes by SET UP menu.  
DEG/RAD/GRAD: Indicates angular units and changes each time  
Thank you for purchasing the SHARP Scientific Calculator Model  
EL-509W/531W/531WG/531WH.  
About the calculation examples (including some formulas and  
tables), refer to the reverse side of this English manual. Refer to  
the number on the right of each title on the manual for use.  
After reading this manual, store it in a convenient location for  
future reference.  
G is pressed.  
STAT  
: Appears when statistics mode is selected.  
M
: Indicates that a numerical value is stored in the independ-  
ent memory.  
Note: Some of the models described in this manual may not be  
BEFORE USING THE CALCULATOR  
available in some countries.  
Key Notation Used in this Manual  
Operational Notes  
In this manual, key operations are described as follows:  
Do not carry the calculator around in your back pocket, as it  
may break when you sit down. The display is made of glass  
and is particularly fragile.  
Keep the calculator away from extreme heat such as on a car  
dashboard or near a heater, and avoid exposing it to exces-  
sively humid or dusty environments.  
Since this product is not waterproof, do not use it or store it  
where fluids, for example water, can splash onto it. Raindrops,  
water spray, juice, coffee, steam, perspiration, etc. will also  
cause malfunction.  
To specify ex  
To specify ln :  
To specify F : Kü  
:
@e  
I
Functions that are printed in orange above the key require @ to  
be pressed first before the key. When you specify the memory,  
press K first. Numbers for input value 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 the Entry and Memories  
Clearing methods are described in the table as follows:  
Clean with a soft, dry cloth. Do not use solvents or a wet cloth.  
Do not drop it or apply excessive force.  
Never dispose of batteries in a fire.  
Keep batteries out of the reach of children.  
This product, including accessories, may change due to up-  
grading without prior notice.  
Clearing  
operation  
Entry  
(Display)  
M*1 A-F, X,Y*2  
ANS*3  
STAT*4  
STAT VAR*5  
NOTICE  
ª
×
×
×
×
SHARP strongly recommends that separate permanent  
written records be kept of all important data. Data may be  
lost or altered in virtually any electronic memory product  
under certain circumstances. Therefore, SHARP assumes  
no responsibility for data lost or otherwise rendered unusable  
whether as a result of improper use, repairs, defects, battery  
replacement, use after the specified battery life has expired,  
or any other cause.  
SHARP will not be liable nor responsible for any incidental or  
consequential economic or property damage caused by  
misuse and/or malfunctions of this product and its peripherals,  
unless such liability is acknowledged by law.  
@c  
@∏00*6  
@∏10*7  
RESET switch  
: Clear  
Independent memory M.  
Temporary memory A-F, X and Y.  
Last answer memory.  
× : Retain  
1
2
3
4
5
6
*
*
*
*
*
*
Statistical data (entered data).  
x¯, sx, σx, n, Σx, Σx2, ¯y, sy, σy, Σy, Σy2, Σxy, r, a, b, c.  
Press the RESET switch (on the back), with the tip of a ball-  
point pen or similar object, only in the following cases. Do not  
use an object with a breakable or sharp tip. Note that pressing  
the RESET switch erases all data stored in memory.  
All variables are cleared. See ‘About the Memory clear key’ for  
details.  
7
*
This key combination functions the same as the RESET switch.  
See ‘About the Memory clear key’ for details.  
When using for the first time  
After replacing the batteries  
To clear all memory contents  
When an abnormal condition occurs and all keys are inop-  
erative.  
[About the Memory clear key]  
Press @∏ to display the menu.  
MEM RESET  
0
1
If service should be required on this calculator, use only a SHARP  
servicing dealer, SHARP approved service facility, or SHARP  
repair service where available.  
To clear all variables (M, A-F, X, Y, ANS, STAT VAR), press  
00 or .  
To RESET the calculator, press 10 or .  
The RESET operation will erase all data stored in memory, and  
restore the calculator's default setting.  
Hard Case  
Entering and Correcting the Equation  
[Cursor keys]  
Press < or > to move the cursor. You can also return to  
the equation after getting an answer by pressing > (<).  
See the next section for using the [ and ] keys.  
In the SET UP menu and other locations, use the < or >  
key to move the flashing cursor, then press ® (= key).  
If you need to scroll up/down the view, use the [ or ]  
key.  
DISPLAY  
Symbol  
[Insert mode and Overwrite mode in the Equation display]  
Equation→  
Display  
This calculator has two editing modes: insert mode (default), and  
overwrite mode. Pressing @‘ switches between the two  
modes. A triangular cursor indicates that an entry will be inserted  
at the cursor, while the rectangular cursor indicates to overwrite  
preexisting data as you make entries.  
Exponent  
Mantissa  
To insert a number in the insert mode, move the cursor to the  
place immediately after where you wish to insert, then make a  
desired entry. In the overwrite mode, data under the cursor will  
be overwritten by the number you enter.  
This mode setting will be retained until the next RESET operation  
is executed.  
During actual use, not all symbols are displayed at the same  
time.  
Certain inactive symbols may appear visible when viewed from  
a far off angle.  
Only the symbols required for the usage under instruction are  
shown in the display and calculation examples of this manual.  
 
[Deletion key]  
Determination of the Angular Unit  
In this calculator, the following three angular units (degrees,  
radians, and grads) can be specified.  
To delete a number/function, move the cursor to the number/func-  
tion you wish to delete, then press d. If the cursor is located at  
the right end of an equation, the d key will function as a back  
space key.  
DEG (°)  
Press G  
Multi-line Playback function  
(rad)  
RAD  
GRAD (g)  
This calculator is equipped with a function to recall previous equa-  
tions in the normal mode. 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 equations (after returning to the previous equa-  
tion, press ] to view equations in order). In addition, @[  
can be used to jump to the oldest equation.  
SCIENTIFIC CALCULATIONS  
Press m0 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  
selecting ‘NORM1’ from the SET UP menu.  
To edit an equation after recalling it, press > (<).  
To edit the displayed equation, press > (<) immediately  
after obtaining a calculation answer.  
Arithmetic Operations  
The closing parenthesis ) just before = or ; may  
The multi-line memory is cleared by the following operations:  
@c, @F (including the Automatic Power Off fea-  
ture), mode change, memory clear (@∏), RESET, @  
`, K (R) ?, constant calculation, chain calcula-  
tion, angle unit conversion, coordinate conversion, N-base con-  
version, numerical value storage to the temporary memories and  
independent memory, and input/deletion of statistical data.  
be omitted.  
Constant Calculations  
In constant calculations, the addend becomes a constant. Sub-  
traction 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.  
Priority Levels in Calculation  
This calculator performs operations according to the following priority:  
Functions  
Q Fractions (1 4, etc.) W Functions preceded by their argument  
l
Refer to the calculation examples of each function.  
Before starting calculations, specify the angular unit.  
x
(x-1, x2, n!, etc.) E Yx,  
¿
R Implied multiplication of a memory  
value (2Y, etc.) T Functions followed by their argument (sin, cos,  
etc.) Y Implied multiplication of a function (2sin30, etc.) U  
n
C
r
,
n
P
r
Random Function  
I ×, ÷ O +, – P AND { OR, XOR, XNOR } =, M+, M–, M,  
|DEG, |RAD, |GRAD, DATA, CD, rθ, xy and other calcula-  
tion ending instructions  
The Random function has four settings for use in the normal or  
statistics mode. (This function cannot be selected while using the  
N-Base function.) Press ª to exit.  
If parentheses are used, parenthesized calculations have prec-  
edence over any other calculations.  
The generated pseudo-random number series is stored in  
memory Y. Each random number is based on a number series.  
[Random Numbers]  
INITIAL SET UP  
A pseudo-random number, with three significant digits from 0 up to  
0.999, can be generated by pressing @`0®. To  
generate the next random number, press ®.  
Mode Selection  
Normal mode (NORMAL): m0  
[Random Dice]  
Used to perform arithmetic operations and function calculations.  
To simulate a die-rolling, a random integer between 1 and 6 can  
be generated by pressing @`1®. To generate  
the next random dice number, press ®.  
Statistics mode (STAT): m1  
Used to perform statistical calculations.  
When executing mode selection, temporary memories, statistical  
variables, statistical data and last answer memory will be cleared  
even when reselecting the same mode.  
[Random Coin]  
To simulate a coin flip, 0 (head) or 1 (tail) can be randomly  
generated by pressing @`2®. To generate the  
next random coin number, press ®.  
SET UP menu  
Press to display the SET UP menu.  
[Random Integer]  
TAB  
F0SE  
An integer between 0 and 99 can be generated randomly by  
pressing @`3®. To generate the next random  
integer number, press ®.  
A menu item can be selected by:  
• moving the flashing cursor by using ><, then press  
Angular Unit Conversions  
® (= key), or  
• pressing the number key corresponding to the menu item number.  
Each time @g are pressed, the angular unit changes in  
If  
or  
is displayed on the screen, press [ or ] to  
sequence.  
view the previous/next menu screen.  
Press ª to exit the SET UP menu.  
Memory Calculations  
This calculator has 8 temporary memories (A-F, X and Y), one  
independent memory (M) and one last answer memory (ANS).  
The independent memory and temporary memories are only avail-  
able in the normal mode.  
[Selecting the Display Notation and Decimal Places]  
The calculator has four display notation systems (Floating point,  
Fixed decimal point, Scientific notation and Engineering notation)  
for displaying calculation results.  
When the FIX, SCI, or ENG symbol is displayed, the number of  
decimal places (TAB) can be set to any value between 0 and 9.  
Displayed values will be reduced to the corresponding number of  
digits.  
If a floating point number does not fit in the specified range, the  
calculator will display the result using the scientific notation (ex-  
ponential notation) system. See ‘Setting the Floating Point Num-  
bers System in Scientific Notation’ for details.  
[Temporary memories (A-F, X and Y)]  
Press O and a corresponding variable key to store a value in  
memory.  
Press R and a corresponding variable key to recall a value  
from the memory.  
To place a variable in an equation, press K, followed by a  
desired variable key.  
[Independent memory (M)]  
Press , followed by 0, to display the following sub-  
In addition to all the features of temporary memories, a value can  
be added to or subtracted from an existing memory value.  
Press ªOM to clear the independent memory (M).  
menu:  
]
FIX  
0
NORM2  
4
SC1I E2NG  
N3ORM1  
[Last answer memory (ANS)]  
[Setting the Floating Point Numbers System in Scientific Notation]  
The calculator has two settings for displaying a floating point number:  
NORM1 (default setting) and NORM2. In each display setting, a  
number is automatically displayed in scientific notation outside a  
preset range:  
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.  
NORM1: 0.000000001 x9999999999  
NORM2: 0.01 x9999999999  
100000÷3=  
[Floating point (NORM1)]  
[Fixed decimal point]  
[TAB set to 2]  
[SCIentific notation]  
[ENGineering notation]  
[Floating point (NORM1)] ”03  
3÷1000=  
ª100000/3= 33’333.33333  
Random function ................. Y memory  
rθ, xy ................................ X memory (r or x),  
Y memory (θ or y)  
”00  
”1 2  
33’333.33333  
33’333.33  
3.33×1004  
33.33×1003  
33’333.33333  
”01  
”02  
Temporary memories and last answer memory are cleared  
even when the same mode is reselected.  
Use of R or K will recall the value stored in memory  
using up to 14 digits.  
[Floating point (NORM1)]  
ª3/1000=  
0.003  
3. ×10–03  
0.003  
Chain Calculations  
[Floating point (NORM2)] ”04  
This calculator allows the previous calculation result to be used  
 
[Floating point (NORM1)] ”03  
in the following calculation.  
The previous calculation result will not be recalled after enter-  
ing multiple instructions.  
In the case of utilizing postfix functions (¿ , sin, etc.), you can  
perform a chain calculation even when the previous calculation  
result is cleared by the use of the ª key.  
0 (SD)  
: Single-variable statistics  
1 (LINE) : Linear regression calculation  
2 (QUAD) : Quadratic regression calculation  
3 (EXP) : Exponential regression calculation  
4 (LOG) : Logarithmic regression calculation  
5 (PWR) : Power regression calculation  
Fraction Calculations  
This calculator performs arithmetic operations and memory cal-  
culations using fractions, and conversion between a decimal  
number and a fraction.  
6 (INV)  
: Inverse regression calculation  
If the number of digits to be displayed is greater than 10, the  
number is converted to and displayed as a decimal number.  
The following statistics can be obtained for each statistical calcula-  
tion (refer to the table below):  
Binary, Pental, Octal, Decimal, and Hexadecimal  
Operations (N-Base)  
Single-variable statistical calculation  
Statistics of Q  
This calculator can perform conversions between numbers ex-  
pressed in binary, pental, octal, decimal and hexadecimal sys-  
tems. It can also perform the four basic arithmetic operations,  
calculations with parentheses and memory calculations using bi-  
nary, pental, octal, decimal, and hexadecimal numbers. In addi-  
tion, the calculator can carry out the logical operations AND, OR,  
NOT, NEG, XOR and XNOR on binary, pental, octal and hexa-  
decimal numbers.  
Linear regression calculation  
Statistics of Q and W 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 Q and W. 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.)  
Conversion to each system is performed by the following keys:  
: Converts to the binary system. “ ” appears.  
: Converts to the pental system. “ ” appears.  
: Converts to the octal system. “ ” appears.  
: Converts to the hexadecimal system. “ ” appears.  
: Converts to the decimal system. “ ”, “ ”, “ ”, and  
Quadratic regression calculation  
Statistics of Q and W and coefficients a, b, c in the quadratic  
regression formula (y = a + bx + cx2). (For quadratic regression  
calculations, no correlation coefficient (r) can be obtained.) When  
there are two x´ values, press @≠.  
” disappear from the display.  
When performing calculations using a, b and c, only one numeric  
value can be held.  
Conversion is performed on the displayed value when these keys  
are pressed.  
Note: In this calculator, the hexadecimal numbers A – F are  
¯x  
Mean of samples (x data)  
A
B
C
D
E
sx  
σx  
n
Sample standard deviation (x data)  
Population standard deviation (x data)  
Number of samples  
entered by pressing , , L, ÷, l, and  
F
I, and displayed as follows:  
Q
Σx  
Sum of samples (x data)  
Sum of squares of samples (x data)  
Mean of samples (y data)  
Sample standard deviation (y data)  
Population standard deviation (y data)  
Sum of samples (y data)  
Sum of squares of samples (y data)  
Sum of products of samples (x, y)  
Correlation coefficient  
A ï, B , C ó, D ò, E ô, F ö  
Σx2  
In the binary, pental, octal, and hexadecimal systems, fractional  
parts cannot be entered. When a decimal number having a frac-  
tional part is converted into a binary, pental, octal, or hexadeci-  
mal number, the fractional part will be truncated. Likewise, when  
the result of a binary, pental, octal, or hexadecimal calculation  
includes a fractional part, the fractional part will be truncated. In  
the binary, pental, octal, and hexadecimal systems, negative num-  
bers are displayed as a complement.  
¯
y
sy  
σy  
Σy  
Σy2  
Σxy  
r
W
a
b
c
Coefficient of regression equation  
Coefficient of regression equation  
Coefficient of quadratic regression equation  
Time, Decimal and Sexagesimal Calculations  
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.  
Use K and R to perform a STAT variable calculation.  
Notation for sexagesimal is as follows:  
Data Entry and Correction  
Entered data are kept in memory until @c are pressed or  
mode selection. Before entering new data, clear the memory con-  
tents.  
degree  
second  
minute  
[Data Entry]  
Single-variable data  
Data k  
Coordinate Conversions  
Data & frequency k (To enter multiples of the same  
Before performing a calculation, select the angular unit.  
data)  
Two-variable data  
Y
Y
P (x,y)  
P (r,θ)  
r
Data x & Data y k  
y
θ
Data x & Data y & frequency k (To enter multiples  
of the same data x and y.)  
X
X
0
0
x
Rectangular coord.  
Polar coord.  
Up to 100 data items can be entered. With the single-variable  
data, a data item without frequency assignment is counted as  
one data item, while an item assigned with frequency is stored as  
a set of two data items. With the two-variable data, a set of data  
items without frequency assignment is counted as two data items,  
while a set of items assigned with frequency is stored as a set of  
three data items.  
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  
Modify Function  
[Data Correction]  
In this calculator, calculation results are internally obtained in  
scientific notation with up to 14 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.  
Correction prior to pressing k immediately after a data entry:  
Delete incorrect data with ª, then enter the correct data.  
Correction after pressing k:  
Use [] to display the data previously entered.  
Press ] to display data items in ascending (oldest first)  
order. To reverse the display order to descending (latest first),  
press the [ key.  
Each item is displayed with ‘Xn=’, ‘Yn=’, or ‘Nn=’ (n is the sequen-  
tial number of the data set).  
STATISTICAL CALCULATIONS  
Display the data item to modify, input the correct value, then  
press k. Using &, you can correct the values of the data  
set all at once.  
Statistical calculations are performed in the statistics mode. Press  
m1 to select the statistics mode. This calculator performs  
the seven statistical calculations indicated below. After selecting  
the statistics mode, select the desired sub-mode by pressing the  
number key corresponding to your choice.  
When changing to the statistical sub-mode, press the correspond-  
ing number key after performing the operation to select the statis-  
tics mode (press m1).  
When  
or  
appears, more data items can be browsed by  
pressing [ or ].  
To delete a data set, display an item of the data set to delete,  
then press @J. The data set will be deleted.  
To add a new data set, press ª and input the values, then  
press k.  
 
Do not fit partially used batteries, and be sure not to mix  
batteries of different types.  
Statistical Calculation Formulas  
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.  
Do not throw batteries into a fire as they may explode.  
Type  
Linear  
Exponential  
Logarithmic  
Power  
Regression formula  
y = a + bx  
y = a ebx  
y = a + b • ln x  
y = a xb  
Replacement Procedure  
1
y = a + b —  
x
y = a + bx + cx2  
Inverse  
1. Turn the power off by pressing @ F.  
2. Remove two screws. (Fig. 1)  
Quadratic  
3. Slide the battery cover slightly and lift it to remove.  
4. [EL-509W/531W/531WG] Remove the used batteries by pry-  
ing them out with a ball-point pen or other similar pointed  
device. (Fig. 2)  
[EL-531WH] Remove the used battery.  
5. [EL-509W/531W/531WG] Install two new batteries. Make sure  
the “+” side is facing up.  
[EL-531WH] Install one new battery. First insert the “ – ” side  
toward the spring. (Fig. 3)  
6. Replace the cover and screws.  
ERROR AND CALCULATION RANGES  
7. Press the RESET switch (on the back).  
Errors  
Make sure that the display appears as shown below. If the  
display does not appear as shown, remove the batteries rein-  
stall them and check the display once again.  
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):  
(Fig. 1)  
(Fig. 2)  
(Fig. 3)  
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 10100  
.
An attempt was made to divide by 0 (or an intermediate calculation  
resulted in zero).  
The calculation ranges were exceeded while performing calculations.  
Automatic Power Off Function  
This calculator will turn itself off to save battery power if no key is  
pressed for approximately 10 minutes.  
Depth error (Error 3):  
The available number of buffers was exceeded. (There are 10 buffers*  
for numeric values and 24 buffers for calculation instructions).  
*5 buffers in STAT mode.  
SPECIFICATIONS  
Data items exceeded 100 in the statistics mode.  
Calculations:  
Scientific calculations, statistical calcula-  
tions, etc.  
Equation too long (Error 4):  
The equation exceeded its maximum input buffer (142 characters).  
An equation must be shorter than 142 characters.  
Internal calculations:  
Pending operations:  
Mantissas of up to 14 digits  
24 calculations 10 numeric values  
(5 numeric values in STAT mode)  
[EL-509W/531W]  
Calculation Ranges  
Power source:  
Within the ranges specified, this calculator is accurate to  
1
3V (DC):  
of the least significant digit of the mantissa. However, a  
calculation error increases in continuous calculations due  
to accumulation of each calculation error. (This is the same  
Alkaline batteries (LR44 or equivalent) × 2  
[EL-531WG]  
Built-in solar cells  
for yx, x , n!, ex, ln, etc., where continuous calculations are  
¿
3 V (DC):  
performed internally.)  
Backup batteries  
Additionally, a calculation error will accumulate and become  
larger in the vicinity of inflection points and singular points  
of functions.  
(Alkaline batteries (LR44 or equivalent) × 2)  
[EL-531WH]  
1.5V (DC):  
Calculation ranges  
Heavy duty manganese battery  
(size AA or R6) × 1  
10–99  
~
9.999999999×1099 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.  
Power consumption:  
Operating time:  
[EL-509W/531W]  
0.0002 W  
[EL-531WH]  
0.0001 W  
[EL-509W/531W]  
Approx. 5000 hours  
BATTERY REPLACEMENT  
[EL-531WH]  
Notes on Battery Replacement  
Approx. 17000 hours  
when continuously displaying 55555. at  
25°C (77°F).  
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.  
Varies according to use and other factors.  
Operating temperature: 0°C – 40°C (32°F – 104°F)  
External dimensions:  
[EL-509W/531W/531WG]  
79.6 mm (W) × 154.5 mm (D) × 13.2 mm (H)  
3-1/8” (W) × 6-3/32” (D) × 17/32” (H)  
[EL-531WH]  
79.6 mm (W) × 154.5 mm (D) × 18.2 mm (H)  
3-1/8” (W) × 6-3/32” (D) × 23/32” (H)  
[EL-509W/531W]  
Approx. 95 g (0.21 lb) (Including batteries)  
[EL-531WG]  
Approx. 97 g (0.22 lb) (Including batteries)  
[EL-531WH]  
Approx. 110 g (0.25 lb) (Including battery)  
[EL-509W/531W/531WG]  
Batteries × 2 (installed), operation manual,  
quick reference card and hard case  
[EL-531WH]  
Batteries are factory-installed before shipment, and may be ex-  
hausted before they reach the service life stated in the specifica-  
tions.  
Weight:  
Notes on erasure of memory contents  
When the battery is replaced, the memory contents are erased.  
Erasure can also occur if the calculator is defective or when it is  
repaired. Make a note of all important memory contents in case  
accidental erasure occurs.  
Accessories:  
When to Replace the Batteries  
[EL-509W/531W/531WH] If the display has poor contrast, the  
batteries require replacement.  
[EL-531WG] 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.  
Battery × 1 (installed), operation manual,  
quick reference card and hard case  
Cautions  
FOR MORE INFORMATION ABOUT  
SCIENTIFIC CALCULATOR  
Fluid from a leaking battery accidentally entering an eye could  
result in serious injury. Should this occur, wash with clean water  
and immediately consult a doctor.  
Should fluid from a leaking battery come in contact with your skin  
or clothes, immediately wash with clean water.  
If the product is not to be used for some time, to avoid damage to  
the unit from leaking batteries, remove them and store in a safe  
place.  
Visit our Web site.  
SHARP CORPORATION  
Do not leave exhausted batteries inside the product.  
 
ENGLISH  
sutSUTVGhH  
Ile¡•L÷⁄™$  
#!qQ%  
EL-509W  
EL-531W  
EL-531WG  
EL-531WH  
sin60[°]=  
ªs 60 =  
0.866025403  
π
Gu (V/ 4  
cos–[rad]=  
4
)=  
0.707106781  
50.  
–1  
tan 1=[g]  
G@T 1 =  
G
(cosh 1.5 +  
2
ª(hu 1.5 +h  
sinh 1.5)  
=
s 1.5 )L=  
20.08553692  
5
@Ht( 5  
–1  
tanh – =  
7
/ 7 )=  
0.895879734  
2.995732274  
1.698970004  
20.08553692  
50.11872336  
ln 20 =  
I 20 =  
l 50 =  
@e 3 =  
1.7 =  
log 50 =  
3
e
=
1.7  
10  
=
1
1
6 @•+ 7 @  
– + – =  
6
7
•=  
0.309523809  
–2  
4
2
8
– 3 × 5  
=
8 ™  
2 - 3 ™  
4 * 5 L=  
–2’024.984375  
1
3
12 3 4  
4
(12 ) =  
@•=  
6.447419591  
512.  
3
8
=
8÷=  
4
=
49 - 4 @$  
49 81  
81 =  
4.  
3.  
3
27 =  
@# 27 =  
4 @!=  
4! =  
24.  
P
=
10 @q 3 =  
5 @Q 2 =  
500 * 25 @%  
120 / 400 @%  
720.  
10.  
10  
5
3
C
=
2
500×25%=  
120÷400=?%  
125.  
30.  
500+(500×25%)= 500 + 25 @%  
400–(400×30%)= 400 - 30 @%  
625.  
280.  
[]  
13(5+2)=  
23×5+2=  
33×5+3×2=  
1  
2  
3  
ª 3 ( 5 + 2 )=  
21.  
17.  
21.  
21.  
17.  
21.  
17.  
3 * 5 + 2 =  
3 * 5 + 3 * 2 =  
@[  
]
]
2  
[
+-*/()  
E
45+285÷3=  
ª 45 + 285 / 3 =  
140.  
18+6  
=
( 18 + 6 )/  
15–8  
( 15 - 8 =  
3.428571429  
–90.  
42×(–5)+120=  
42 *  
5 + 120 =  
1
*1 (5  
)
*
θ = sin–1 x, θ = tan–1 x  
θ = cos–1 x  
(5×103)  
÷
(4×10–3)= 5 E 3 / 4 E  
DEG  
–90 ≤ θ ≤ 90  
0 ≤ θ ≤ 180  
0 ≤ θ ≤ π  
1’250’000.  
3 =  
π
2
π
2
RAD  
≤ θ ≤  
GRAD  
–100 ≤ θ ≤ 100  
0 ≤ θ ≤ 200  
34+57=  
45+57=  
34 + 57 =  
91.  
102.  
g
45  
=
90°→ [rad]  
[g]  
[°]  
ª 90 @g  
@g  
1.570796327  
79–59=  
56–59=  
79 - 59 =  
20.  
–3.  
100.  
90.  
56  
=
@g  
56÷8=  
92÷8=  
56 / 8  
=
7.  
11.5  
–1  
sin 0.8 = [°]  
@S 0.8 =  
53.13010235  
0.927295218  
59.03344706  
53.13010235  
92  
=
[rad]  
[g]  
[°]  
@g  
@g  
68×25=  
68×40=  
68 * 25 =  
1’700.  
2’720.  
@g  
40 =  
 
KRO;:?  
êûîìíãâ†ä  
àá  
A=56  
B=68  
A÷2+B×4=  
ª 56 OA  
68 OB  
56.  
68.  
b
DEC(25)BIN  
ª@í 25 @ê  
11001  
KA/ 2 +  
HEX(1AC)  
BIN  
PEN  
OCT  
DEC  
1AC  
@ê  
@û  
@î  
@í  
KB* 4 =  
300.  
b
P
0
110101100  
3203  
ª 8 * 2 OM  
24 /KM=  
KM* 5 =  
16.  
1.5  
80.  
24÷(8×2)=  
(8×2)×5=  
654  
428.  
ªOM  
0.  
450.  
250.  
35.  
BIN(1010–100)  
×11 =  
@ê( 1010 - 100 )  
b
b
$150×3:M1  
+)$250:M2 =M1+250  
–)M2×5%  
150 * 3 ;  
* 11 =  
10010  
250 ;  
BIN(111)NEG  
ã 111 =  
1111111001  
R M * 5 @ %  
@:RM  
M
665.  
HEX(1FF)+  
OCT(512)=  
HEX(?)  
1FF @î+  
0
512 =  
1511  
349  
$1= ¥110  
¥26,510=$?  
$2,750=¥?  
110 OY  
110.  
241.  
302’500.  
H
@ì  
26510 /RY=  
2750 *RY=  
2FEC–  
2C9E=(A)  
+)2000–  
1901=(B)  
(C)  
ªOM@ì 2FEC -  
H
2C9E ;  
2000 -  
1901 ;  
RM  
34E  
r = 3cm  
3 OY  
3.  
2
πr = ?  
VKYL=  
28.27433388  
H
H
6FF  
A4d  
(r Y)  
24 /( 4 + 6 )  
=
24  
= 2.4...(A)  
4+6  
1011 AND  
101 = (BIN)  
ª@ê 1011 †  
2.4  
b
H
b
101 =  
1
db  
3 *K?+ 60 /  
K?=  
3×(A)+60÷(A)=  
32.2  
5A OR C3 = (HEX) 5A ä C3 =  
NOT 10110 =  
(BIN)  
@êâ 10110 =  
1111101001  
0
24 XOR 4 = (OCT) 24 à 4 =  
20  
B3 XNOR  
2D = (HEX)  
DEC  
B3 á  
H
2D =  
FFFFFFFF61  
–159.  
@í  
6+4=ANS  
ANS+5  
ª 6 + 4 =  
10.  
15.  
+ 5 =  
8×2=ANS  
ANS  
8 * 2 =  
16.  
256.  
2
L=  
44+37=ANS  
44 + 37 =  
81.  
9.  
o_  
=
ANS  
⁄=  
12°39’18.05”  
[10]  
ª 12 o 39 o 18.05  
@_  
12.65501389  
123.678  
[60]  
123.678 @_  
123°40’40.8”  
\|  
3h30m45s +  
6h45m36s = [60]  
3 o 30 o 45 + 6 o  
45 o 36 =  
10°16’21”  
ª 3 \ 1 \ 2 +  
4 \ 3 =  
\
1
2
4
3
b
c
3– + – = [a–]  
4
5
6 *  
l
l
1234°56’12” +  
0°0’34.567” = [60]  
1234 o 56 o 12 +  
[a.xxx]  
[d/c]  
4.833333333  
29  
0 o 0 o 34.567 =  
1234°56’47”  
2°3’36”  
@|  
6
l
3h45m –  
1.69h = [60]  
3 o 45 - 1.69 =  
2
2 \ 3  
@_  
103  
=
=
4.641588834  
sin62°12’24” = [10]  
s 62 o 12 o 24  
(–)5  
7
7 \ 5 5 =  
16807 3125  
=
5
l
=
0.884635235  
1
3
1
8
1 \ 8 1 \ 3  
=
(–)  
=
1
2
l
64  
225  
64 \ 225 =  
8
15  
=
l
{},≠  
3
4
( 2 3 )\  
2
=
( 3 4 )=  
8
81  
3
l
ª 6 @, 4  
x = 6  
y = 4  
r =  
θ = [°]  
@{[r ]  
7.211102551  
33.69006753  
7.211102551  
1.2  
2.3  
=
1.2 \ 2.3 =  
12 23  
l
@≠[θ]  
@≠[r ]  
1°2’3”  
2
=
1 o 2 o 3 \ 2  
=
0°31’1.5”  
14 @, 36  
@}[x]  
@≠[y]  
@≠[x]  
3
r = 14  
x =  
1×10  
2×10  
11.32623792  
8.228993532  
11.32623792  
=
1 E 3 \ 2 E 3 =  
1
2
l
3
θ = 36[°]  
y =  
A = 7  
ª 7 OA  
4 \KA=  
7.  
4
=
4
7
l
A
2
1.25 + 2 \ 5 =  
1.65  
13 20  
l
1.25 + – = [a.xxx]  
5
b
\
1
1
l
l
[a–]  
c
1.65  
ª 1.65 =  
\
1.65  
b
[a–]  
c
13 20  
l
[d/c]  
@|  
\
33 20  
l
[a.xxx]  
1.65  
5
6
* 4  
5
6=4—  
l
l
 
j”  
Σx2 – nx2  
Σx  
5÷9=ANS  
ANS×9=  
[FIX,TAB=1]  
ª”00”1 1  
5 / 9 =  
x =  
σx =  
n
0.6  
5.0  
n
* 9 =*1  
Σx2 – nx2  
n – 1  
1
2
n
Σx = x + x + ··· + x  
Σx2 = x 2 + x 2 + ··· + x  
n
2
sx =  
1
2
5 / 9 =@j  
0.6  
5.4  
* 9 =*2  
Σy2 – ny2  
Σy  
n
”03  
σy =  
y =  
n
1
*
*
5.5555555555555×10–1×9  
0.6×9  
Σxy = x y + x y + ··· + x y  
1
1
2
2
n
n
2
Σy2 – ny2  
n – 1  
Σy = y + y + ··· + y  
1
2
n
sy =  
Σy2 = y 2 + y 2 + ··· + y  
2
1
2
n
k&~£pnzw^  
¢PZWvrab©  
xy≠  
Function  
Funktion  
Fonction  
Función  
Função  
Funzioni  
Functie  
Függvény  
Funkce  
Funktion  
Dynamic range  
zulässiger Bereich  
Plage dynamique  
Rango dinámico  
Gama dinâmica  
Campi dinamici  
Rekencapaciteit  
DATA  
95  
80  
80  
75  
75  
m10  
95 k  
0.  
1.  
2.  
3.  
4.  
5.  
80 k  
k
75 & 3 k  
50 k  
Megengedett számítási tartomány  
Dynamický rozsah  
75  
50  
Definitionsområde  
Dynaaminen ala  
ÑË̇Ï˘ÂÒÍËÈ ‰Ë‡Ô‡ÁÓÌ  
Dynamikområde  
x=  
σx=  
n=  
Σx=  
Σx2=  
sx=  
sx2=  
R~  
Rp  
Rn  
Rz  
Rw  
R£  
L=  
75.71428571  
12.37179148  
7.  
530.  
41’200.  
13.3630621  
178.5714286  
Funktio  
îÛÌ͈Ëfl  
Funktion  
Fungsi  
Fungsi  
Julat dinamik  
Kisaran dinamis  
(95–x)  
( 95 -K~)  
/K£ * 10  
+ 50 =  
×10+50=  
sx  
DEG:  
RAD:  
| x | < 1010  
64.43210706  
(tan x : | x | 90 (2n–1))*  
π
sin x, cos x,  
tan x  
| x | < ––– × 1010  
x
y
m11  
2 & 5 k  
k
0.  
1.  
2.  
3.  
4.  
180  
π
2
(tan x : | x | – (2n–1))*  
10  
2
5
5
GRAD:  
| x | < × 1010  
9
2
(tan x : | x | 100 (2n–1))*  
12 & 24 k  
21 & 40 & 3 k  
15 & 25 k  
Ra  
12 24  
21 40  
21 40  
21 40  
15 25  
sin–1x, cos–1x  
| x | 1  
5.  
1.050261097  
1.826044386  
0.995176343  
8.541216597  
15.67223812  
tan–1x, 3¿x  
| x | < 10100  
Rb  
In x, log x  
10–99 x < 10100  
Rr  
R£  
y > 0:  
y = 0:  
y < 0:  
–10100 < x log y < 100  
R¢  
0 < x < 10100  
x
y
x = n  
x=3 y’=?  
y=46 x’=?  
3 @y  
6.528394256  
24.61590706  
1
x
(0 < | x | < 1: – = 2n–1, x 0)*,  
46 @x  
–10100 < x log | y | < 100  
x
y
1
y > 0: –10100 < – log y < 100 (x 0)  
m12  
12 & 41 k  
8 & 13 k  
5 & 2 k  
23 & 200 k  
15 & 71 k  
Ra  
0.  
1.  
2.  
3.  
4.  
x
y = 0: 0 < x < 10100  
12 41  
8
5
13  
2
x
¿y  
y < 0: x = 2n–1  
1
(0 < | x | < 1 : – = n, x 0)*,  
x
23 200  
15 71  
1
–10100 < – log | y | < 100  
x
5.  
5.357506761  
–3.120289663  
0.503334057  
x
e
–10100 < x 230.2585092  
–10100 < x < 100  
Rb  
R©  
x
10  
x=10y’=?  
y=22x’=?  
10 @y  
22 @x  
@≠  
24.4880159  
9.63201409  
–3.432772026  
9.63201409  
sinh x, cosh x,  
tanh x  
| x | 230.2585092  
@≠  
sinh–1 x  
| x | < 1050  
cosh–1 x  
1 x < 1050  
tanh–1 x  
| x | < 1  
k[]  
x2  
| x | < 1050  
DATA  
30  
40  
40  
50  
m10  
30 k  
0.  
1.  
2.  
3.  
x3  
| x | < 2.15443469×1033  
0 x < 10100  
40 & 2 k  
50 k  
¿x  
x–1  
n!  
| x | < 10100 (x 0)  
0 n 69*  
DATA  
30  
45  
45  
45  
]]]  
45 & 3 k  
]
0 r n 9999999999*  
X2 = 45.  
N2 = 3.  
nPr  
n!  
—– < 10100  
(n-r)!  
60  
] 60 k  
X3 = 60.  
 
In Europe:  
• • • •  
0 r n 9999999999*  
0 r 69  
nCr  
n!  
—– < 10100  
(n-r)!  
DEG, D°M’S  
0°0’0.00001” | x | < 10000°  
x2 + y2  
x, y r, θ  
< 10100  
0 r < 10100  
DEG:  
RAD:  
| θ | < 1010  
r, θ → x, y  
π
10  
—–  
10  
| θ | <  
× 10  
180  
GRAD : | θ | < –– × 1010  
9
DEGRAD, GRADDEG: | x | < 10100  
DRG |  
π
RADGRAD: | x | < – × 1098  
2
DEC  
BIN  
PEN  
OCT  
HEX  
AND  
OR  
XOR  
XNOR  
DEC  
BIN  
:
:
| x | 9999999999  
1000000000 x 1111111111  
0 x 111111111  
2222222223 x 4444444444  
0 x 2222222222  
4000000000 x 7777777777  
0 x 3777777777  
PEN  
OCT  
HEX  
:
:
:
FDABF41C01 x FFFFFFFFFF  
0 x 2540BE3FF  
BIN  
:
:
:
:
1000000000 x 1111111111  
0 x 111111111  
2222222223 x 4444444444  
0 x 2222222221  
4000000000 x 7777777777  
0 x 3777777777  
FDABF41C01 x FFFFFFFFFF  
0 x 2540BE3FE  
PEN  
OCT  
HEX  
NOT  
Tento pístroj vyhovuje poÏadavkÛm smûrnice 89/336/EEC v platném  
znûní 93/68/EEC.  
BIN  
:
:
:
:
1000000001 x 1111111111  
0 x 111111111  
2222222223 x 4444444444  
0 x 2222222222  
4000000001 x 7777777777  
0 x 3777777777  
FDABF41C01 x FFFFFFFFFF  
0 x 2540BE3FF  
Nur für Deutschland/For Germany only:  
PEN  
OCT  
HEX  
Umweltschutz  
NEG  
Das Gerät wird durch eine Batterie mit Strom versorgt.  
Um die Batterie sicher und umweltschonend zu entsorgen,  
beachten Sie bitte folgende Punkte:  
• Bringen Sie die leere Batterie zu Ihrer örtlichen Mülldeponie,  
zum Händler oder zum Kundenservice-Zentrum zur  
Wiederverwertung.  
• Werfen Sie die leere Batterie niemals ins Feuer, ins Wasser  
oder in den Hausmüll.  
* n, r: integer / ganze Zahlen / entier / entero / inteiro / intero /  
geheel getal / egész számok / celé číslo / heltal /  
kokonaisluku / ˆÂÎ˚ / heltal /  
/
/
/
integer / bilangan bulat  
Seulement pour la France/For France only:  
Protection de l’environnement  
L’appareil est alimenté par pile. Afin de protéger  
l’environnement, nous vous recommandons:  
• d’apporter la pile usagée ou à votre revendeur ou au service  
après-vente, pour recyclage.  
• de ne pas jeter la pile usagée dans une source de chaleur,  
dans l’eau ou dans un vide-ordures.  
Endast svensk version/For Sweden only:  
Miljöskydd  
Denna produkt drivs av batteri.  
Vid batteribyte skall följande iakttagas:  
• Det förbrukade batteriet skall inlämnas till er lokala handlare  
eller till kommunal miljöstation för återinssamling.  
• Kasta ej batteriet i vattnet eller i hushållssoporna. Batteriet  
får ej heller utsättas för öppen eld.  
OPMERKING: ALLEEN VOOR NEDERLAND/  
NOTE: FOR NETHERLANDS ONLY  
 

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