Sharp Calculator EL W531 User Manual

Memory clear key  
DISPLAY  
Press @ P to display the menu.  
To initialize the display settings,  
press 0. The parameters set  
as follows:  
ENGLISH  
Symbol  
• Angular unit: DEG  
• Display notation: NORM1  
• N-base: DEC  
To clear all variables and memories (A−F, M, X, Y, D1−D4, ANS,  
and STAT) at once, press 1 0.  
To RESET the calculator, press 2 0. The RESET  
operation will erase all data stored in memory and restore the  
calculator’s default settings.  
Dot  
matrix  
display  
SCIENTIFIC CALCULATOR  
EL-W531  
EL-W531G  
EL-W531H  
EL-W531HA  
EL-W535  
Mantissa  
Exponent  
• During actual use, not all symbols are displayed at the same  
time.  
• Only the symbols required for the usage under instruction are  
shown in the display and calculation examples of this manual.  
MODEL  
1
ENTERING, DISPLAYING, AND EDITINGTHE EQUATION  
OPERATION MANUAL  
The WriteView Editor  
:
Indicates that some contents are hidden in the  
directions shown.  
/
/
Entry and display  
In the WriteView editor, you can  
enter and display fractions or certain  
functions as you would write them.  
Notes:  
• The WriteView editor can only be  
used in NORMAL mode.  
• If the equation grows too large, it may extend off the edge of the  
display after you obtain the result. If you want to see the entire  
equation, press l or r to return to the editing screen.  
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA  
07BGK (TINSE1278EHZZ)  
2ndF: Appears when @ is pressed, indicating that the  
functions shown in orange are enabled.  
HYP:  
Indicates that H has been pressed and the  
hyperbolic functions are enabled. If @ > is  
pressed, the symbols “2ndF HYP” appear, indicating  
that inverse hyperbolic functions are enabled.  
INTRODUCTION  
ALPHA: Indicates that ;, x or t has been pressed,  
and entry (recall) of memory contents and recall of  
statistics can be performed.  
Thank you for purchasing the SHARP Scientific Calculator  
Model EL-W531/W531G/W531H/W531HA/W535.  
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 in the  
manual for use.  
After reading this manual, store it in a convenient location for  
future reference.  
Notes:  
Displaying calculation results  
DEG/RAD/GRAD: Indicates angular units.  
BUSY: Appears during the execution of a calculation.  
W-VIEW: Indicates that the WriteView editor is selected.  
When possible, calculation results will be displayed using  
fractions, r, and π. When you press U, the display will cycle  
through the following display styles:  
• Mixed fractions (with or without π) improper fractions (with  
M:  
Indicates that a numerical value is stored in the  
independent memory (M).  
or without π) decimal numbers  
• Proper fractions (with or without π) decimal numbers  
• Irrational numbers (square roots, fractions made using square  
roots) decimal numbers  
ENG/SCI/FIX/N2/N1: Indicates the notation used to display a  
value and changes by SET UP menu. N1 is displayed  
on-screen as “NORM1”, and N2 as “NORM2”.  
• Some of the models described in this manual may not be  
available in some countries.  
• This product uses a period as a decimal point.  
Notes:  
• In the following cases, calculation results may be displayed  
using r:  
• Arithmetic operations and memory calculations  
Trigonometric calculations  
Operational Notes  
BEFORE USING THE CALCULATOR  
• 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.  
When using for the first time, press the RESET switch (on the  
back), with the tip of a ball-point pen or similar object.  
• In trigonometric calculations, when  
entering values such as those in  
the table to the right, results may be  
shown using r.  
• Calculation results may extend off  
the edges of the screen.You can  
see those parts by pressing l  
Entry value  
• Keep the calculator away from extreme heat such as on a  
car dashboard or near a heater, and avoid exposing it to  
excessively 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.  
• 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.  
Adjusting the Display Contrast  
Press J 3, then + or & to adjust the contrast.  
Press j to exit.  
DEG  
multiples of 15  
1
RAD  
multiples of 12 π  
50  
multiples of ⎯  
3
GRAD  
Power On and Off  
Press j to turn the calculator on. The data that was on-  
screen when the power was turned off will appear on the display.  
Press @ o to turn it off.  
or r (depending on whether the left or right portion is  
hidden).  
• Improper/proper fractions will be converted to and displayed as  
decimal numbers if the number of digits used in their expression  
is greater than nine. In the case of mixed fractions, the maximum  
number of displayable digits (including integers) is eight.  
• If the number of digits in the denominator of a fractional result  
that uses π is greater than three, the result is converted to and  
displayed as a decimal number.  
Key Notations Used in this Manual  
In this manual, key operations are described as follows:  
• Keep batteries out of the reach of children.  
• This product, including accessories, may change due to  
upgrading without prior notice.  
x
@ "  
To specify e :  
To specify ln: i  
To specify E:  
NOTICE  
; E  
• 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.  
• Functions that are printed in orange above the key require  
@ to be pressed first before the key. When you specify the  
memory, press ; first. Numbers for input values are not  
shown as keys, but as ordinary numbers.  
• Functions that are printed in gray adjacent to the keys are  
effective in specific modes.  
The Line Editor  
Entry and display  
In the Line editor, you can enter and  
display equations line by line.  
Notes:  
• Up to three lines of text may be  
viewed on the screen at one time.  
• If the length of the equation exceeds three lines, parts of it may  
be hidden from view after calculation. If you want to see the  
rest of the equation, press l or r to return to the editing  
screen.  
The WriteView and Line Editors  
This calculator has the following two editors in NORMAL mode:  
WriteView and Line.You can select between them in the SET UP  
menu.  
• In the Line editor, calculation results are displayed in decimal  
form.  
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.  
• When using for the first time  
• After replacing the battery  
To clear all memory contents  
• When an abnormal condition occurs and all keys are  
inoperative  
If service should be required on this calculator, use only a  
SHARP servicing dealer, SHARP approved service facility, or  
SHARP repair service where available.  
Editing the Equation  
The WriteView editor (default)  
The Line editor  
Just after obtaining an answer, pressing l brings you to  
the end of the equation and pressing r brings you to the  
beginning. Press l, r, u, or d to move the  
cursor. Press @ l or @ r to jump the cursor to the  
beginning or the end of the equation.  
Note: In certain calculation examples, where you see the o  
symbol, the key operations and calculation results are  
shown as they would appear in the Line editor.  
Clearing the Entry and Memories  
In the WriteView editor, you can use u and d to move the  
cursor up and down—between the numerator and denominator,  
for example.  
Operation  
Entry  
(Display) M, X, Y  
A–F*1, D1–D4*2 ANS STAT*3  
Back space and delete key  
j
×
×
×
×
×
×
×
×
×
×
×
×
×*5  
×
Hard Case  
To delete a number or function, move the cursor to the right of it,  
then press N.You can also delete a number or function that  
the cursor is directly over by pressing @ y.  
@Z  
Mode selection (b)  
@P0*4  
@P10*4  
@P20*4  
RESET switch  
2
Multi-line Playback Function  
This calculator is equipped with a function to recall previous  
equations and answers in NORMAL mode. A maximum of 340  
characters can be stored in memory. When the memory is full,  
stored equations will be deleted to make room, starting with the  
oldest.  
Remove the hard case, holding it with your fingers in the  
positions shown below.  
: Clear  
: Retain  
×
*1 Press j x and then choose a memory to clear one  
variable memory.  
*2 Definable memory. See “Memory Calculations”.  
*3 Statistical data (entered data)  
*4 See “Memory clear key”.  
*5 Cleared when changing between sub-modes in STAT mode.  
Pressing u will display the previous equation. Further  
pressing u will display preceding equations (after returning to  
the previous equation, press d to view equations in order). In  
addition, @ u can be used to jump to the oldest equation,  
and @ d to jump to the newest one.  
To edit an equation after recalling it, press l or r.  
• The multi-line memory will be cleared by the following operations:  
@ Z , mode change, RESET, N-base conversion,  
angular unit conversion, editor change (J 2 0 or  
 
J 2 1), and memory clear (@ P 1 0).  
• Equations that have one result require an additional eleven  
characters’ worth of memory to store in order to hold the result.  
• In addition to the amount of memory needed to store an  
equation, the WriteView editor will require a certain amount for  
the sake of display.  
• Equations also include calculation ending instructions, such as  
=”.  
6
Functions  
• Refer to the calculation examples for each function.  
• In the Line editor, the following symbols are used:  
: to indicate an expression’s power. (m, @ ",  
@ Y)  
: to separate integers, numerators, and denominators.  
(W, @ k)  
• When using @ O or @ W in the Line editor,  
values are entered in the following way:  
• logn (base, value)  
Priority Levels in Calculation  
This calculator performs operations according to the following  
priority:  
• abs value  
Fractions (1 4, etc.) Functions preceded by their argument  
m
x
x
(x1, x , n!, etc.) y , r Implied multiplication of a memory  
2
Random Function  
value (2Y, etc.) Functions followed by their argument (sin, cos,  
1
The random function has four settings. (This function cannot  
be selected while using the N-base function.) To generate  
further random numbers in succession, press e. Press  
j to exit.  
etc.) Implied multiplication of a function (2sin30, A , etc.)  
4
nCr, nPr ×, ÷ +, AND OR, XOR, XNOR =,  
xy,  
M+, M, M, DEG, RAD, GRAD, DATA, CD, rθ, →  
and other calculation ending instructions  
• If parentheses are used, parenthesized calculations have  
precedence over any other calculations.  
Random numbers  
A pseudo-random number, with three significant digits from 0  
up to 0.999, can be generated by pressing @ w 0  
e.  
INITIAL SET UP  
Mode Selection  
Note: In the WriteView editor, the result will be a fraction or 0.  
Random dice  
NORMAL mode: b 0 (default)  
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 @ w 1 e.  
Random coin  
STAT mode: b 1  
Used to perform statistical operations.  
To simulate a coin flip, 0 (heads) or 1 (tails) can be randomly  
generated by pressing @ w 2 e.  
DRILL mode: b 2  
Used to practice math and multiplication table drills.  
Random integer  
An integer between 0 and 99 can be generated randomly by  
pressing @ w 3 e.  
SET UP Menu  
Press J to display the SET UP  
menu.  
7
Angular Unit Conversions  
Each time @ ] is pressed, the angular unit changes in  
Press j to exit the SET UP menu.  
sequence.  
Determination of the angular unit  
The following three angular units (degrees, radians, and grads)  
can be specified.  
DEG (°): J 0 0 (default)  
RAD (rad): J 0 1  
8
Memory Calculations  
Memory calculations can be performed in NORMAL and STAT  
modes.  
Temporary memories (A–F, X andY)  
Press x and a variable key to store a value in memory.  
Press t and a variable key to recall the value from that  
memory. To place a variable in an equation, press ; and a  
variable key.  
GRAD (g): J 0 2  
3
Selecting the display notation and decimal places  
Five display notation systems are used to display calculation  
results: Two settings of Floating point (NORM1 and NORM2),  
Fixed decimal point (FIX), Scientific notation (SCI), and  
Engineering notation (ENG).  
• When J 1 0 (FIX) or J 1 2 (ENG) is  
pressed, “TAB(0–9)?” will be displayed and the number of  
decimal places (TAB) can be set to any value between 0 and 9.  
• When J 1 1 (SCI) is pressed, “SIG(0–9)?” will be  
displayed and the number of significant digits can be set to any  
value between 0 and 9. Entering 0 will set a 10-digit display.  
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.  
Press j x M to clear the independent memory (M).  
Last answer memory (ANS)  
The calculation result obtained by pressing = or any other  
calculation ending instruction is automatically stored in the  
last answer memory.  
Setting the floating point number system in scientific notation  
Two settings are used to display a floating-point number: NORM1  
(the default) and NORM2. A number is automatically displayed in  
scientific notation outside a preset range:  
Notes:  
• Calculation results from the functions indicated below are  
automatically stored in the X or Y memories replacing any  
existing vaxluye:sX. memory (r or x), Y memory (θ or y)  
rθ, →  
• NORM1 (J13): 0.000000001 | x | 9,999,999,999  
Two x´ values from a quadratic regression calculation in  
STAT mode: X memory (1:), Y memory (2:)  
• Use of t or ; will recall the value stored in memory  
using up to 14 digits.  
• NORM2 (J14): 0.01 | x | 9,999,999,999  
Selecting the editor  
Two editors are available in NORMAL mode:  
• The WriteView editor (W-VIEW): J 2 0 (default)  
• The Line editor (LINE): J 2 1  
Definable memories (D1–D4)  
You can store functions or operations in definable memories  
(D1–D4).  
Adjusting the display contrast  
Press J 3, then + or & to adjust the contrast.  
Press j to exit.  
To store a function or operation, press x, followed by  
a definable memory key (I, J, K, or L),  
followed by the operation you want to store. Menu-related  
operations, such as J, cannot be stored. Press j to  
return to the previous display.  
To call a stored function or operation, press the  
corresponding memory key. Calling a stored function will do  
nothing if the function that is called would be unusable in the  
current context.  
Insert and overwrite entry methods  
When using the Line editor, you can change the entry method  
from “INSERT” (the default) to “OVERWRITE”.  
After you switch to the overwrite method (by pressing J 4  
1), the triangular cursor will change to a rectangular one, and  
the number or function underneath it will be overwritten as you  
make entries.  
• Any functions or operations that are stored in a definable  
memory will be replaced when you save a new one into that  
memory.  
SCIENTIFIC CALCULATIONS  
• Press b 0 to select NORMAL mode.  
• In each example, press j to clear the display first. Unless  
otherwise specified, calculation examples are performed in the  
WriteView editor with the default display settings (@ P  
0).  
• When displaying and correcting a data set in STAT mode,  
you cannot store functions or operations in definable  
memories.  
9
Chain Calculations  
The previous calculation result can be used in the subsequent  
calculation. However, it cannot be recalled after entering  
multiple instructions.  
4
Arithmetic Operations  
• The closing parenthesis ) just before = or m may  
be omitted.  
10  
Fraction Calculations  
5
Constant Calculations  
Arithmetic operations and memory calculations can be  
performed using fractions. In NORMAL mode, conversion  
between a decimal number and a fraction can be performed  
by pressing U.  
• In constant calculations, the addend becomes a constant.  
Subtraction and division are performed in the same manner.  
For multiplication, the multiplicand becomes a constant.  
• In constant calculations, constants will be displayed as K.  
Notes:  
• Improper/proper fractions will be converted to and displayed  
as decimal numbers if the number of digits used in their  
expression is greater than nine. In the case of mixed  
fractions, the maximum number of displayable digits  
(including integers) is eight.  
To convert a sexagesimal value to a fraction, first convert it  
by pressing @ :.  
 
Binary, Pental, Octal, Decimal, and Hexadecimal  
Operations (N-base)  
Conversions can be performed between N-base numbers  
in NORMAL mode. The four basic arithmetic operations,  
calculations with parentheses, and memory calculations can  
also be performed, along with the logical operations AND,  
OR, NOT, NEG, XOR, and XNOR on binary, pental, octal, and  
hexadecimal numbers.  
DRILL MODE  
x
Mean of samples (x data)  
11  
sx  
σx  
n
Sample standard deviation (x data)  
Population standard deviation (x data)  
Number of samples  
Math Drill: b 2 0  
Math operation questions with positive integers and 0 are  
displayed randomly. It is possible to select the number of  
questions and operator type.  
Multiplication Table (× Table): b 2 1  
Questions from each row of the multiplication table (1 to 12) are  
displayed serially or randomly.  
Σx  
Σx  
Sum of samples (x data)  
Conversion to each system is performed with the following keys:  
@ z (“BIN” appears), @ r (“PEN” appears),  
@ g (“OCT” appears), @ h (“HEX” appears),  
@ / (“BIN”, “PEN”, “OCT”, and “HEX” disappear)  
Note: The hexadecimal numbers A–F are entered by pressing  
2
Sum of squares of samples (x data)  
Mean of samples (y data)  
y
To exit DRILL mode, press b and select another mode.  
Sample standard deviation (y data)  
Population standard deviation (y data)  
Sum of samples (y data)  
Using Math Drill and ×Table  
sy  
A
B
C
D
E
F
1. Press b 2 0 for Math Drill or b 2 1 for  
× Table.  
m, *, A, l, i, and H.  
σy  
Σy  
Σy2  
In the binary, pental, octal, and hexadecimal systems,  
fractional parts cannot be entered. When a decimal number  
having a fractional part is converted into a binary, pental,  
octal, or hexadecimal 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 numbers are displayed as  
a complement.  
2. Math Drill: Use u and d to select the number of  
questions (25, 50, or 100).  
Sum of squares of samples (y data)  
× Table: Use u and d to select a row in the  
multiplication table (1 to 12).  
y
y
)
Σx  
r
Sum of products of samples (x,  
3. Math Drill: Use l and r to select the operator type for  
questions (+, , ×, ÷, or +×÷).  
Correlation coefficient  
× Table: Use l and r to select the order type (“Serial”  
or “Random”).  
Coefficient of regression equation  
Coefficient of regression equation  
Coefficient of quadratic regression equation  
a
4. Press e to start.  
b
12  
When using Math Drill or ×Table (random order only),  
questions are randomly selected and will not repeat except  
by chance.  
5. Enter your answer. Press j or N to clear the entered  
number and then enter the correct answer.  
6. Press e.  
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 performed using the sexagesimal  
system. Notation for sexagesimal is as follows:  
c
• Use ; and t to perform a variable calculation in STAT  
mode.  
U does not function in STAT mode.  
• If the answer is correct, “ ” appears and the next question  
is displayed.  
16  
Data Entry and Correction  
Before entering new data, clear the memory contents.  
Degree  
Second  
Minute  
• If the answer is wrong, “ ”appears and the same question  
is displayed. This will be regarded as an incorrect answer.  
• If you press e without entering an answer, the correct  
answer is displayed and then the next question is displayed.  
This will be regarded as an incorrect answer.  
7. Continue answering the series of questions by entering the  
answer and pressing e.  
8. After you finish, press e and the number and percentage  
of correct answers are displayed.  
9. Press e to return to the initial screen for your current drill.  
13  
Coordinate Conversions  
• Before performing a calculation, select the angular unit.  
• The calculation result is automatically stored in the X and Y  
memories (r or x in X memory, and θ or y in Y memory).  
• The results of coordinate conversions will be displayed as  
decimal numbers even in the WriteView editor.  
Data entry  
Single-variable data  
Data _  
Data H frequency _ (To enter multiples of the same  
data)  
Two-variable data  
Data x H data y _  
Data x H data y H frequency _ (To enter multiples  
of the same data x and y)  
Note: 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.  
Math Drill sample  
Current question/  
Total questions  
Rectangular coord.  
Polar coord.  
14  
Modify Function  
Question  
Decimal calculation results are internally obtained in scientific  
notation, with up to 14 digits in 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 (@ n), the internal  
value is converted to match that of the display, so that the  
displayed value can be used without change in subsequent  
operations.  
Data correction  
See step 6 above.  
Correction before pressing _ immediately after a data entry:  
Delete incorrect data with j, then enter the correct data.  
Correction after pressing _:  
Use u and d to display the previously entered data set.  
Press d to display the data set in ascending (oldest first)  
order. To reverse the display order to descending (latest first),  
press the u key. Press @ u or @ d to jump  
the cursor to the beginning or end of the data set.  
Each data set is displayed with “X:”, “Y:”, or “F:”.  
• When using the WriteView editor, if the calculation result is  
displayed using fractions or irrational numbers, press U  
to convert it to decimal form first.  
Number of questions  
Operator type  
Percentage correct  
Correct answers  
STATISTICAL CALCULATIONS  
×Table sample  
Statistical calculations can be performed in STAT mode.  
There are eight sub-modes within STAT mode. Press b  
1, then press the number key that corresponds to your  
choice:  
Data set number  
Data x  
Frequency  
Total remaining  
questions  
Question  
0 (S#a# 0 [SD]): Single-variable statistics  
1 (S#a# 1 [LINE]): Linear regression  
2 (S#a# 2 [QUAD]): Quadratic regression  
3 (S#a# 3 [E_EXP]): Euler exponential regression  
4 (S#a# 4 [LOG]): Logarithmic regression  
5 (S#a# 5 [POWER]): Power regression  
6 (S#a# 6 [INV]): Inverse regression  
Data set number  
Data x  
Data y  
Frequency  
See step 6 above.  
Display and move the cursor to the data item to be modified  
by using u and d, input the correct value, then press  
_ or e.  
7 (S#a# 7 [G_EXP]): General exponential regression  
To delete a data set, display and move the cursor to an item  
of the data set to delete by using u and d, then press  
@ #. The data set will be deleted.  
To add a new data set, press j to exit the display of  
previously entered data and input the values, then press _.  
15  
Statistical Calculations and Variables  
The following statistics can be obtained for each statistical  
calculation (refer to the table below):  
Multiplicand  
Order type  
Single-variable statistical calculation  
Statistics of ①.  
Percentage correct  
Correct answers  
17  
Statistical Calculation Formulas  
Linear regression calculation  
Ranges of Math Drill Questions  
The range of questions for each operator type is as follows.  
Type  
Regression formula  
Statistics of and . In addition, the estimate of y for a  
given x (estimate y´) and the estimate of x for a given y  
(estimate x´).  
+
Addition operator: “0 + 0” to “20 + 20”  
Subtraction operator: “0 0” to “20 20”; answers are  
Linear  
y = a + bx  
]
2
Quadratic  
Quadratic regression calculation  
y = a + bx + cx  
positive integers and 0.  
Statistics of and , and coefficients a, b, c in the quadratic  
>
)
Multiplication operator: “1 × 0” or “0 × 1” to “12 × 12”  
Division operator: “0 ÷ 1” to “144 ÷ 12”; answers are  
positive integers from 1 to 12 and 0, dividends of up to  
144, and divisors of up to 12.  
x
y = a eb  
Euler exponential  
Logarithmic  
Power  
2
regression formula (y = a + bx + cx ). (For quadratic  
regression calculations, no correlation coefficient (r) can be  
obtained.) When there are two x´ values, each value will be  
displayed with “1:” or “2:”, and stored separately in the X and  
Y memories.  
y = a + b lnx  
y = a xb  
+]>) Mixed operators: Questions within all the above  
1
ranges are displayed.  
Inverse  
y = a + b  
x
Euler exponential regression, logarithmic regression,  
power regression, inverse regression, and general  
exponential regression calculations  
y = a bx  
General exponential  
ERRORS AND CALCULATION RANGES  
An error will occur when:  
Statistics of and . In addition, the estimate of y for a given  
x and the 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.)  
Errors  
• The absolute value of the intermediate result or calculation  
An error will occur if an operation exceeds the calculation ranges,  
or if a mathematically illegal operation is attempted. When an error  
occurs, pressing l or r automatically moves the cursor  
back to the place in the equation where the error occurred. Edit  
the equation or press j to clear the equation.  
result is equal to or greater than 1 × 10100  
.
• 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.  
 
Error codes and error types  
• If the product is not to be used for some time, to avoid  
damage to the unit from a leaking battery, remove it and  
store in a safe place.  
• Do not leave an exhausted battery inside the product.  
• Keep batteries out of the reach of children.  
• An exhausted battery left in the calculator may leak and  
damage the calculator.  
ERROR 01: Syntax error  
• An attempt was made to perform an invalid operation.  
Ex. 2 + & 5 =  
ERROR 02: Calculation error  
• The absolute value of an intermediate or final calculation  
• Explosion risk may be caused by incorrect handling.  
• Do not throw batteries into a fire as they may explode.  
result equals or exceeds 10100  
.
• An attempt was made to divide by zero (or an intermediate  
calculation resulted in zero).  
• The calculation ranges were exceeded while performing  
calculations.  
Replacement Procedure  
1.Turn the power off by pressing @ o.  
2.Remove the two screws. (Fig. 1)  
3.Slide the battery cover slightly and lift it to remove.  
4.EL-W531/W531G/W535: Remove the used battery by  
prying it out with a ball-point pen or other similar pointed  
device. (Fig. 2)  
ERROR 03: Nesting error  
• The available number of buffers was exceeded. (There are  
10 buffers for numeric values and 64 buffers for calculation  
instructions).  
EL-W531H/W531HA: Remove the used battery.  
5.EL-W531/W531G/W535: Install one new battery. Make sure  
the “+” side is facing up.  
ERROR 04: Data over  
• Data items exceeded 100 in STAT mode.  
EL-W531H/W531HA: Install one new battery. First insert the  
” side toward the spring. (Fig. 3)  
18  
Alert Messages  
6.Replace the cover and screws.  
7.Press the RESET switch (on the back) with the tip of a  
ball-point pen or similar object.  
8.Adjust the display contrast. See “Adjusting the Display  
Contrast”.  
• Make sure that the display appears as shown below. If the  
display does not appear as shown, remove the battery,  
reinstall it, and check the display once again.  
Cannot delete!  
• The selected item cannot be deleted by pressing N or  
@ y in the WriteView editor.  
Ex. * 5 r A l N  
In this example, delete the exponent before attempting to  
delete the parentheses.  
Cannot call!  
• The function or operation stored in definable memory (D1 to  
D4) cannot be called.  
Ex. An attempt was made to recall a statistical variable from  
within NORMAL mode.  
Buffer full!  
• The equation (including any calculation ending instructions)  
exceeded its maximum input buffer (159 characters in the  
WriteView editor or 161 characters in the Line editor). An  
equation may not exceed its maximum input buffer.  
Fig. 1  
Fig. 2  
Fig. 3  
19  
Calculation Ranges  
Within the ranges specified, this calculator is accurate to  
1 of the 10th digit of the mantissa. However, a calculation  
error increases in continuous calculations due to  
accumulation of each calculation error. (This is the same  
Automatic Power Off Function  
This calculator will turn itself off to save battery power if no  
key is pressed for approximately 10 minutes.  
x
for yx, r, n!, e , ln, etc., where continuous calculations  
x
SPECIFICATIONS  
are performed internally.)  
Additionally, a calculation error will accumulate and  
become larger in the vicinity of inflection points and  
singular points of functions.  
Calculation features: Scientific calculations, statistical  
calculations, etc.  
Drill features:  
Display:  
Display of calculation results:  
Math Drill and Multiplication Table  
96 × 32 dot matrix liquid crystal display  
• Calculation ranges  
10 99 to 9.999999999 × 1099 and 0.  
If the absolute value of an entry or a final or intermediate  
Mantissa: 10 digits  
Exponent: 2 digits  
result of a calculation is less than 10 99, the value is  
considered to be 0 in calculations and in the display.  
Internal calculations: Mantissas of up to 14 digits  
Pending operations: 64 calculations 10 numeric values  
Display of results using r  
Calculation results may be displayed using r when all of the  
following conditions are met:  
• When intermediate and final calculation results are displayed  
in the following form:  
Power source:  
EL-W531/W535  
1.5 V — (DC): Alkaline battery (LR44 or  
equivalent) × 1  
EL-W531G  
P
e
P
f
a
b
c
d
Built-in solar cells  
⎯ ⎯  
1.5 V — (DC): Backup battery  
(Alkaline battery (LR44 or equivalent) × 1)  
EL-W531H/W531HA  
• When each coefficient falls into the following ranges:  
1 a < 100; 1 < b < 1,000; 0 c < 100;  
1 d < 1,000; 1 e < 100; 1 f < 100  
1.5 V — (DC): Heavy duty manganese  
battery (size AAA or R03) × 1  
• When the number of terms in the intermediate and final  
calculation results is one or two.  
Power consumption: EL-W531/W531H/W531HA/W535  
Note: The result of two fractional terms that include r will be  
reduced to a common denominator.  
0.00011 W  
Operating time:  
EL-W531/W535  
(varies according to Approx. 3,000 hours when continuously  
use and other factors) displaying 55555. at 25°C (77°F)  
EL-W531G  
BATTERY REPLACEMENT  
Notes on Battery Replacement  
Approx. 3,000 hours when continuously  
displaying 55555. at 25°C (77°F), using  
the alkaline battery only  
EL-W531H/W531HA  
Approx. 17,000 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:  
• Make sure the new battery is the correct type.  
• When installing, orient the battery properly as indicated in the  
calculator.  
• The battery is factory-installed before shipment, and may  
be exhausted before it reaches the service life stated in the  
specifications.  
Operating temperature: 0°C–40°C (32°F–104°F)  
External dimensions:  
79.6 mm (W) × 161.5 mm (D) ×  
15.5 mm (H)  
Notes on erasure of memory contents  
3-1/8” (W) × 6-11/32” (D) × 5/8” (H)  
Weight:  
EL-W531/W535  
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.  
Approx. 100 g (0.22 lb) (including battery)  
EL-W531G  
Approx. 102 g (0.23 lb) (including battery)  
EL-W531H/W531HA  
Approx. 107 g (0.24 lb) (including battery)  
When to Replace the Battery  
Accessories:  
Battery × 1 (installed), operation  
EL-W531/W531H/W531HA/W535: If the display has poor  
contrast even after adjusting the display contrast, the battery  
requires replacement.  
manual, and hard case  
EL-W531G: If the display has poor contrast or nothing appears  
on the display when j is pressed in dim lighting, even after  
adjusting the display contrast, it is time to replace the battery.  
FOR MORE INFORMATION ABOUT SCIENTIFIC CALCULATORS  
Visit our Web site.  
Cautions  
• 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.  
 
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103  
103  
1
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11.32623792  
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14 n J  
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[
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DATA  
b 1 2  
0.  
Function keys  
Funktionstasten  
Touches de fonction Affichage  
Display  
Anzeige  
Buffer space*  
Pufferplatz*  
Espace tampon*  
y
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Függvénybillentyűk  
Tlačítka funkcí  
Funktionstangenter  
Funktionäppäimet  
Funktionstaster  
Visualizador Espacio de memoria intermedia  
Exibição Espaço na memória intermediária  
Display  
Display  
Kijelző  
Zobrazení  
Visning  
Näyttö  
*
*
÷
=
5
9
H
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8
5
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Memoria tampone*  
Bufferruimte*  
Pufferterület*  
Vyrovnávací paměť*  
Buffertutrymme*  
Puskuritila*  
0.6  
U
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9
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5.0  
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5.357506761  
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0.6  
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Ruang buffer*  
=
b
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3120289663  
n
[MDF]  
ANS  
1  
@ Z  
1
1
1
5
7
5
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0.503334057  
24.4880159  
9
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c =  
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5
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9
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16 _ H u d #  
2
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10□  
[
S#a# 0 SD  
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b
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DATA  
20  
15 _ H R v p c g o Q  
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4
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DATA SET=  
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80  
50  
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DATA SET=  
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4
* The amount of memory used for the sake of display in the  
WriteView editor, measured in characters (excluding entered  
values, denoted in the chart by “”).  
_
DATA  
30  
75  
75  
75  
* Der für die Anzeige in WriteView Editor verwendete  
Speicherplatz, gemessen in Zeichen (ohne die eingegebenen  
Werte, die in der Tabelle mit „“ markiert sind).  
H
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d d d  
DATA SET=  
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75  
50  
3
3
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45  
45  
45  
60  
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WriteView, mesuré en caractère (à l’exception des valeurs  
d’entrée, indiquées dans le tableau par “”).  
t
t
t
t
t
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p
c
g
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v
=
75.71428571  
3
x =  
x
* La cantidad de memoria usada para visualizar en el editor  
Write View, medida en caracteres (excluyendo los valores  
introducidos, indicados en el grafico mediante “”).  
* A quantidade de memória que é usada para a exibição no  
editor WriteView, medida em caracteres (excluindo os valores  
introduzidos, indicados no quadro por “”).  
=
x
x
σ
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σ 12.37179148  
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d
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n =  
n=  
60  
X:  
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60  
530.  
Σx =  
Σx2 =  
sx =  
Σx=  
Σx2=  
sx=  
* La quantità di memoria utilizzata per la visualizzazione nell’editor  
WriteView, misurata in caratteri (escludendo i valori inseriti,  
indicati nella tabella con il simbolo “”).  
* De hoeveelheid geheugen dat wordt gebruikt om de WriteView  
editor weer te geven, gemeten in symbolen (met uitzondering  
van ingevoerde waarden aangeduid in de grafiek met ”).  
* A WriteView szerkesztő megjelenítési műveleteire használatos  
memóriaterület, karakterben kifejezve (az ábrán „” karakterrel  
jelölt beviteli értékeket nem számítva).  
* Množství paměti využívané pro účely zobrazení v editoru  
WriteView, vyjádřené počtem znaků (vyjma zadaných hodnot,  
označených v grafu znakem „“).  
* Den mängd minne som används för visning med WriteView-  
redigeraren, mätt i antalet tecken (exklusive inmatade värden,  
vilka anges som ”” i tabellen).  
17  
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41200.  
13.3630621  
178.5714286  
Σx2 nx2  
Σx  
x =  
σx =  
n
n
+
Σx2 nx2  
Σx x1 + x2 +  
x
+
=
+
n x  
Σx2 x1 x2  
sx =  
2
2
2
=
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n
1
n
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sx =  
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Σy  
Σ
y2 ny2  
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x y  
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y
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* Den mængde hukommelse, der bruges til visning i WriteView-  
editoren, målt i tegn (med undtagelse af indtastede værdier, der  
angives med i tabellen).  
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4
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dalam editor WriteView, diukur dalam jumlah karakter (tidak  
termasuk nilai yang dimasukkan, ditunjukkan dalam diagram  
dengan “”)  
H
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a
25  
15  
25  
DATA SET=  
=
t
t
t
a
b
f
a
b
=
=
1.050261097  
1.826044386  
0.995176343  
8.541216597  
15.67223812  
6.528394256  
24.61590706  
=
b
r =  
r=  
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sy  
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sx  
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19  
BIN: 1000000000  
x
1111111111  
4444444444  
0
x
111111111  
Function  
Funktion  
Fonction  
Función  
Função  
Funzioni  
Functie  
Függvény  
Funkce  
Funktion  
Dynamic range  
zulässiger Bereich  
Plage dynamique  
Rango dinámico  
Gama dinâmica  
Campi dinamici  
PEN: 2222222223  
x
0
x
2222222221  
NOT  
NEG  
OCT: 4000000000  
x
7777777777  
0
x
3777777777  
HEX: FDABF41C01  
x
FFFFFFFFFF  
0
x
2540BE3FE  
Rekencapaciteit  
Megengedett számítási tartomány  
Dynamický rozsah  
Definitionsområde  
Dynaaminen ala  
BIN: 1000000001  
x
1111111111  
4444444444  
0
x
111111111  
PEN: 2222222223  
x
Funktio  
Funktion  
0
x
2222222222  
Dynamikområde  
OCT: 4000000001  
x
7777777777  
0
x
3777777777  
HEX: FDABF41C01  
x
FFFFFFFFFF  
Fungsi  
Kisaran dinamis  
0
x
2540BE3FF  
DEG: |x| 1010  
<
* n, r: integer / ganze Zahlen / entier / entero / inteiro / intero  
(tanx: | x| 90(2n 1))*  
/ geheel getal / egész számok / celé číslo / heltal /  
π
kokonaisluku / heltal /  
bulat  
/
/ bilangan  
RAD: |x|  
1010  
<
×
180  
π
sin x, cos x, tan x  
x
(tanx: |  
|
(2n 1))*  
2
10  
9
Nur für Deutschland/For Germany only:  
GRAD: |x|  
1010  
<
×
Umweltschutz  
(tanx: | x| 100(2n 1))*  
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.  
sin–1 x, cos–1  
x
|x|  
1
tan–1 x, 3Px  
|x| 10100  
<
lnx, logx, loga x  
10–99  
x
10100, 10–99  
a
10100 (a 1)  
<
<
• Werfen Sie die leere Batterie niemals ins Feuer, ins Wasser  
oder in den Hausmüll.  
0: 10100 xlogy 100  
y  
>
=
<
0: 0  
0: x  
<
<
10100  
y  
x
<
=
<
yx  
y  
n
Seulement pour la France/For France only:  
1
x
(0 |x| 1:  
2n 1, x 0)*,  
<
<
=
Protection de l’environnement  
Lappareil 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.  
10100 xlog|y| 100  
<
<
1
x
0: 10100  
logy 100 (x 0)  
10100  
y  
>
<
<
y  
0: 0  
x
=
<
<
x
y  
0: x 2n  
1
<
=
Py  
1
x
x
(0 |x| 1:  
<
10100  
n,  
0)*,  
<
=
Endast svensk version/For Sweden only:  
1
log|y| 100  
<
<
x
Miljöskydd  
Denna produkt drivs av batteri.  
x
e
10100  
x
230.2585092  
100  
<
<
<
Vid batteribyte skall följande iakttagas:  
• Det förbrukade batteriet skall inlämnas till batteriinsamling  
eller till kommunal miljöstation för återinssamling.  
• Kasta ej batteriet i vattnet eller i hushållssoporna. Batteriet  
får ej heller utsättas för öppen eld.  
x
10  
10100  
x
sinhx, coshx, tanhx |x| 230.2585092  
sinh–1  
cosh–1  
x
|x| 1050  
<
x
1
x
1050  
<
For Europe only:  
tanh–1  
x2  
x
|x|  
1
<
|x| 1050  
<
x3  
|x| 2.15443469 1033  
<
×
Px  
x–1  
n!  
0
x
10100  
<
|x| 10100 (x 0)  
<
n
r
0
69*  
OPMERKING: ALLEEN VOOR NEDERLAND/  
NOTE: FOR NETHERLANDS ONLY  
0
n
9999999999*  
n!  
nPr  
nCr  
10100  
<
(n r)!  
0
0
r
r
n
69  
9999999999*  
n!  
10100  
A. Information on Disposal for Users (private households)  
1. In the European Union  
<
(n r)!  
Attention: If you want to dispose of this equipment, please do not use the ordinary  
dust bin!  
DEG, D°M’S  
0°0’0.00001” |x| 10000°  
<
Used electrical and electronic equipment must be treated separately and in accordance  
with legislation that requires proper treatment, recovery and recycling of used electrical  
and electronic equipment.  
is marked with this  
10100  
x
2 + y2  
<
x, y r,  
Attention:Your product  
θ
Following the implementation by member states, private households within the EU states  
may return their used electrical and electronic equipment to designated collection facilities  
free of charge*. In some countries* your local retailer may also take back your old product  
free of charge if you purchase a similar new one.  
symbol. It means that  
used electrical and  
electronic products  
should not be mixed  
with general household  
waste.There is a  
separate collection  
system for these  
0
r
10100  
<
DEG:  
|
|
1010  
θ <  
π
*) Please contact your local authority for further details.  
RAD:  
|
|
1010  
r, x, y  
θ
θ < 180  
×
×
If your used electrical or electronic equipment has batteries or accumulators, please  
dispose of these separately beforehand according to local requirements.  
10  
By disposing of this product correctly you will help ensure that the waste undergoes the  
necessary treatment, recovery and recycling and thus prevent potential negative effects  
on the environment and human health which could otherwise arise due to inappropriate  
waste handling.  
GRAD: |  
|
1010  
θ <  
products.  
9
DEG RAD, GRAD DEG: |x| 10100  
<
2. In other Countries outside the EU  
π
DRG▶  
If you wish to discard this product, please contact your local authorities and ask for the  
correct method of disposal.  
x
RAD GRAD: |  
|
1098  
<
×
2
For Switzerland: Used electrical or electronic equipment can be returned free of charge to  
the dealer, even if you don’t purchase a new product. Further collection facilities are listed  
DEC  
BIN  
PEN  
OCT  
HEX  
AND  
OR  
XOR  
XNOR  
DEC: |x| 9999999999  
BIN: 1000000000  
x
1111111111  
4444444444  
B. Information on Disposal for Business Users.  
1. In the European Union  
0
x
111111111  
PEN: 2222222223  
x
If the product is used for business purposes and you want to discard it:  
Please contact your SHARP dealer who will inform you about the take-back of the product.  
You might be charged for the costs arising from take-back and recycling. Small products  
(and small amounts) might be taken back by your local collection facilities.  
0
x
2222222222  
OCT: 4000000000  
x
7777777777  
0
x
3777777777  
For Spain: Please contact the established collection system or your local authority for  
take-back of your used products.  
HEX: FDABF41C01  
x
FFFFFFFFFF  
2. In other Countries outside the EU  
0
x
2540BE3FF  
If you wish to discard of this product, please contact your local authorities and ask for the  
correct method of disposal.  
ENGLISH  
For Australia/New Zealand only:  
 

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