DISPLAY
ENGLISH
SCIENTIFIC CALCULATOR
EL-W531
EL-W531G
EL-W531H
EL-W531HA
• During actual use, not all symbols are displayed at the same
EL-W535
MODEL
time.
• Only the symbols required for the usage under instruction are
OPERATION MANUAL
shown in the display and calculation examples of this manual.
/
/
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA
2ndF:
07BGK (TINSE1278EHZZ)
HYP:
INTRODUCTION
ALPHA: Indicates that ;, x or t has been pressed,
Thank you for purchasing the SHARP Scientiﬁ c Calculator
Model EL-W531/W531G/W531H/W531HA/W535.
About the calculation examples (including some formulas
DEG/RAD/GRAD: Indicates angular units.
and tables), refer to the reverse side of this English manual.
Refer to the number on the right of each title in the
BUSY: Appears during the execution of a calculation.
manual for use.
W-VIEW: Indicates that the WriteView editor is selected.
After reading this manual, store it in a convenient location for
M:
future reference.
Notes:
ENG/SCI/FIX/N2/N1: Indicates the notation used to display a
• Some of the models described in this manual may not be
available in some countries.
• This product uses a period as a decimal point.
Operational Notes
BEFORE USING THE CALCULATOR
• Do not carry the calculator around in your back pocket, as it
When using for the ﬁ rst time, press the RESET switch (on the
may break when you sit down. The display is made of glass
back), with the tip of a ball-point pen or similar object.
and is particularly fragile.
• Keep the calculator away from extreme heat such as on a
Adjusting the Display Contrast
car dashboard or near a heater, and avoid exposing it to
Press J 3, then + or & to adjust the contrast.
excessively humid or dusty environments.
Press j to exit.
• Since this product is not waterproof, do not use it or store
it where ﬂ uids, for example water, can splash onto it.
Power On and Off
Raindrops, water spray, juice, coffee, steam, perspiration,
Press j to turn the calculator on. The data that was on-
etc. will also cause malfunction.
screen when the power was turned off will appear on the display.
• Clean with a soft, dry cloth. Do not use solvents or a wet cloth.
Press @ o to turn it off.
• Do not drop it or apply excessive force.
Key Notations Used in this Manual
• Never dispose of batteries in a ﬁ re.
• Keep batteries out of the reach of children.
In this manual, key operations are described as follows:
• This product, including accessories, may change due to
upgrading without prior notice.
NOTICE
• SHARP strongly recommends that separate permanent
• Functions that are printed in orange above the key require
written records be kept of all important data. Data may be
@ to be pressed ﬁ rst before the key. When you specify the
lost or altered in virtually any electronic memory product
memory, press ; ﬁ rst. Numbers for input values are not
under certain circumstances. Therefore, SHARP assumes
shown as keys, but as ordinary numbers.
no responsibility for data lost or otherwise rendered
• Functions that are printed in gray adjacent to the keys are
unusable whether as a result of improper use, repairs,
effective in speciﬁ c modes.
defects, battery replacement, use after the speciﬁ ed
battery life has expired, or any other cause.
The WriteView and Line Editors
• SHARP will not be liable nor responsible for any incidental
This calculator has the following two editors in NORMAL mode:
or consequential economic or property damage caused
WriteView and Line. You can select between them in the SET UP
by misuse and/or malfunctions of this product and its
menu.
peripherals, unless such liability is acknowledged by law.
♦ 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.
The WriteView editor (default)
• When using for the ﬁ rst time
Note: In certain calculation examples, where you see the o
• After replacing the battery
• To clear all memory contents
• When an abnormal condition occurs and all keys are
inoperative
Clearing the Entry and Memories
If service should be required on this calculator, use only a
SHARP servicing dealer, SHARP approved service facility, or
Operation
SHARP repair service where available.
j
Hard Case
@ Z
Mode selection (b)
@ P 0*
@ P 1 0*
@ P 2 0*
Remove the hard case, holding it with your ﬁ ngers in the
RESET switch
positions shown below.
○: Clear
*1 Press j x and then choose a memory to clear one
variable memory.
*2 Deﬁ nable memory. See "Memory Calculations".
*3 Statistical data (entered data)
*4 See "Memory clear key".
*5 Cleared when changing between sub-modes in STAT mode.
Binary, Pental, Octal, Decimal, and Hexadecimal
Operations (N-base)
11
Conversions can be performed between N-base numbers
in NORMAL mode. The four basic arithmetic operations,
calculations with parentheses, and memory calculations can
①
also be performed, along with the logical operations AND,
OR, NOT, NEG, XOR, and XNOR on binary, pental, octal, and
hexadecimal numbers.
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
A
B
C
D
E
F
m
, *
, A
, l
, i
, and H
.
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
②
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.
Time, Decimal, and Sexagesimal Calculations
12
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
• Use ; and t to perform a variable calculation in STAT
system. Notation for sexagesimal is as follows:
mode.
• U does not function in STAT mode.
Data Entry and Correction
Degree
Second
Minute
Before entering new data, clear the memory contents.
Coordinate Conversions
13
Data entry
• Before performing a calculation, select the angular unit.
Single-variable data
• The calculation result is automatically stored in the X and Y
Data _
θ
r
x
y
memories (
or
in X memory, and
or
in Y memory).
Data H frequency _ (To enter multiples of the same
• The results of coordinate conversions will be displayed as
data)
decimal numbers even in the WriteView editor.
Two-variable data
Data
Data
of the same data
Note: Up to 100 data items can be entered. With the single-
Rectangular coord.
Polar coord.
Modify Function
14
Decimal calculation results are internally obtained in scientiﬁ c
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
Data correction
display. By using the modify function (@ n), the internal
Correction before pressing _ immediately after a data entry:
value is converted to match that of the display, so that the
Delete incorrect data with j, then enter the correct data.
displayed value can be used without change in subsequent
Correction after pressing _:
operations.
Use u and d to display the previously entered data set.
• When using the WriteView editor, if the calculation result is
Press d to display the data set in ascending (oldest ﬁ rst)
displayed using fractions or irrational numbers, press U
order. To reverse the display order to descending (latest ﬁ rst),
to convert it to decimal form ﬁ rst.
press the u key. Press @ u or @ d to jump
the cursor to the beginning or end of the data set.
STATISTICAL CALCULATIONS
Each data set is displayed with "X:", "Y:", or "F:".
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:
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
Display and move the cursor to the data item to be modiﬁ ed
6 (S#a# 6 [INV]): Inverse regression
by using u and d, input the correct value, then press
7 (S#a# 7 [G_EXP]): General exponential regression
_ or e.
Statistical Calculations and Variables
• To delete a data set, display and move the cursor to an item
15
The following statistics can be obtained for each statistical
calculation (refer to the table below):
• To add a new data set, press j to exit the display of
Single-variable statistical calculation
Statistics of ①.
Statistical Calculation Formulas
Linear regression calculation
Statistics of ① and ②. In addition, the estimate of
y
for a
x
y
x
y
given
(estimate
´) and the estimate of
for a given
Linear
x
(estimate
´).
Quadratic
Quadratic regression calculation
a
b
c
Statistics of ① and ②, and coefﬁ cients
,
,
in the quadratic
Euler exponential
y =
+ b
+
a
x
cx
regression formula (
2
). (For quadratic
r
regression calculations, no correlation coefﬁ cient (
) can be
Logarithmic
x
obtained.) When there are two
´ values, each value will be
Power
displayed with "1:" or "2:", and stored separately in the X and
Y memories.
Inverse
Euler exponential regression, logarithmic regression,
General exponential
power regression, inverse regression, and general
exponential regression calculations
An error will occur when:
Statistics of ① and ②. In addition, the estimate of
y
for a given
• The absolute value of the intermediate result or calculation
x
x
y
and the estimate of
for a given
. (Since the calculator
result is equal to or greater than 1
converts each formula into a linear regression formula before
• The denominator is zero.
actual calculation takes place, it obtains all statistics, except
• An attempt is made to take the square root of a negative
a
b
coefﬁ cients
and
, from converted data rather than entered
number.
data.)
• No solution exists in the quadratic regression calculation.
Memory clear key
Press @ P to display the menu.
Symbol
• To initialize the display settings,
press 0. The parameters set
as follows:
• Angular unit: DEG
• Display notation: NORM1
Dot
• N-base: DEC
matrix
display
• 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
Mantissa
Exponent
calculator's default settings.
ENTERING, DISPLAYING, AND EDITING THE EQUATION
The WriteView Editor
:
Indicates that some contents are hidden in the
Entry and display
directions shown.
In the WriteView editor, you can
Appears when @ is pressed, indicating that the
enter and display fractions or certain
functions shown in orange are enabled.
functions as you would write them.
Indicates that H has been pressed and the
Notes:
hyperbolic functions are enabled. If @ > is
• The WriteView editor can only be
used in NORMAL mode.
pressed, the symbols "2ndF HYP" appear, indicating
• If the equation grows too large, it may extend off the edge of the
that inverse hyperbolic functions are enabled.
display after you obtain the result. If you want to see the entire
equation, press l or r to return to the editing screen.
and entry (recall) of memory contents and recall of
statistics can be performed.
Displaying calculation results
When possible, calculation results will be displayed using
fractions, r, and
through the following display styles:
• Mixed fractions (with or without
Indicates that a numerical value is stored in the
or without
independent memory (M).
• Proper fractions (with or without
• Irrational numbers (square roots, fractions made using square
value and changes by SET UP menu. N1 is displayed
roots)
on-screen as "NORM1", and N2 as "NORM2".
Notes:
• In the following cases, calculation results may be displayed
using r:
• Arithmetic operations and memory calculations
• Trigonometric calculations
• 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
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.
x
e
: @ "
To specify
• If the number of digits in the denominator of a fractional result
To specify ln: i
that uses
To specify E: ; E
displayed as a decimal number.
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.
• In the Line editor, calculation results are displayed in decimal
form.
Editing the Equation
Just after obtaining an answer, pressing l brings you to
The Line editor
the end of the equation and pressing r brings you to the
beginning. Press l, r, u, or d to move the
symbol, the key operations and calculation results are
cursor. Press @ l or @ r to jump the cursor to the
shown as they would appear in the Line editor.
beginning or the end of the equation.
In the WriteView editor, you can use u and d to move the
cursor up and down—between the numerator and denominator,
Entry
A–F*
1
,
D1–D4*
2
ANS STAT*
3
for example.
(Display)
M, X, Y
Back space and delete key
○
×
×
×
×
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
○
×
×
×
×*
5
the cursor is directly over by pressing @ y.
4
○
×
×
×
×
Multi-line Playback Function
4
○
○
○
○
○
This calculator is equipped with a function to recall previous
4
○
○
○
○
○
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
×
: Retain
oldest.
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).
x –
DRILL MODE
x
Mean of samples (
data)
sx
x
Sample standard deviation (
data)
Math Drill: b 2 0
Math operation questions with positive integers and 0 are
σ
x
x
Population standard deviation (
data)
displayed randomly. It is possible to select the number of
questions and operator type.
n
Number of samples
Multiplication Table (
Σ
x
x
Sum of samples (
data)
Questions from each row of the multiplication table (1 to 12) are
Σ
x
x
2
displayed serially or randomly.
Sum of squares of samples (
data)
–
y
y
To exit DRILL mode, press b and select another mode.
Mean of samples (
data)
s
y
Using Math Drill and
y
Sample standard deviation (
data)
1. Press b 2 0 for Math Drill or b 2 1 for
σy
Population standard deviation (
y
data)
×
2. Math Drill: Use u and d to select the number of
Σy
y
Sum of samples (
data)
questions (25, 50, or 100).
Σy
×
2
Sum of squares of samples (
y
data)
multiplication table (1 to 12).
Σ
x
y
x
y
Sum of products of samples (
,
)
3. Math Drill: Use l and r to select the operator type for
questions (
r
Correlation coefﬁ cient
×
a
Coefﬁ cient of regression equation
or "Random").
4. Press e to start.
b
Coefﬁ cient of regression equation
When using Math Drill or
questions are randomly selected and will not repeat except
c
Coefﬁ cient of quadratic regression equation
by chance.
5. Enter your answer. Press j or N to clear the entered
number and then enter the correct answer.
6. Press e.
• If the answer is correct, "
16
is displayed.
• If the answer is wrong, "
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 ﬁ nish, press e and the number and percentage
x
H data
y
_
of correct answers are displayed.
x
H data
y
H frequency _ (To enter multiples
9. Press e to return to the initial screen for your current drill.
x
and
y
)
Math Drill sample
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.
×
Table sample
Data set number
Data
x
Frequency
Data set number
Data
x
Data
y
Frequency
of the data set to delete by using u and d, then press
@ #. The data set will be deleted.
previously entered data and input the values, then press _.
17
Ranges of Math Drill Questions
Type
Regression formula
The range of questions for each operator type is as follows.
+
=
+ bx
y
a
]
=
+ bx +
y
a
cx
2
>
=
⋅
y
a
e
b
x
)
=
+ b ⋅
y
a
x
ln
=
⋅
y
a
x
b
+]>)
1
=
+ b
⎯
y
a
x
=
⋅ b
y
a
x
ERRORS AND CALCULATION RANGES
Errors
×
An error will occur if an operation exceeds the calculation ranges,
100
10
.
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.
• 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
=
"
".
Priority Levels in Calculation
This calculator performs operations according to the following
priority:
① Fractions (1
−
x
x
(
1
,
value (2Y, etc.) ⑤ Functions followed by their argument (sin, cos,
etc.) ⑥ Implied multiplication of a function (2sin 30, A
1
⑦ nCr, nPr ⑧
+
M
, M
and other calculation ending instructions
• If parentheses are used, parenthesized calculations have
precedence over any other calculations.
INITIAL SET UP
Mode Selection
NORMAL mode: b 0 (default)
Used to perform arithmetic operations and function calculations.
STAT mode: b 1
Used to perform statistical operations.
π
DRILL mode: b 2
. When you press U, the display will cycle
Used to practice math and multiplication table drills.
π
)
improper fractions (with
π
)
decimal numbers
SET UP Menu
π
)
decimal numbers
Press J to display the SET UP
menu.
decimal numbers
Press j to exit the SET UP menu.
Determination of the angular unit
The following three angular units (degrees, radians, and grads)
can be speciﬁ ed.
DEG (°):
RAD (rad): J 0 1
Entry value
GRAD (g): J 0 2
DEG
multiples of 15
Selecting the display notation and decimal places
⎯
1
π
RAD
multiples of
Five display notation systems are used to display calculation
12
⎯
50
results: Two settings of Floating point (NORM1 and NORM2),
GRAD
multiples of
3
Fixed decimal point (FIX), Scientiﬁ c 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 signiﬁ cant digits can be set to any
value between 0 and 9. Entering 0 will set a 10-digit display.
π
is greater than three, the result is converted to and
Setting the ﬂ oating point number system in scientiﬁ c notation
Two settings are used to display a ﬂ oating-point number: NORM1
(the default) and NORM2. A number is automatically displayed in
scientiﬁ c notation outside a preset range:
• NORM1 (J 1 3): 0.000000001
• NORM2 (J 1 4): 0.01
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
Adjusting the display contrast
Press J 3, then + or & to adjust the contrast.
Press j to exit.
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.
SCIENTIFIC CALCULATIONS
• Press b 0 to select NORMAL mode.
• In each example, press j to clear the display ﬁ rst. Unless
otherwise speciﬁ ed, calculation examples are performed in the
WriteView editor with the default display settings (@ P
0).
Arithmetic Operations
2
• The closing parenthesis ) just before = or m may
be omitted.
Constant Calculations
• 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.
Error codes and error types
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 ﬁ nal calculation
×
Table): b 2 1
result equals or exceeds 10
• An attempt was made to divide by zero (or an intermediate
calculation resulted in zero).
• The calculation ranges were exceeded while performing
calculations.
×
Table
ERROR 03: Nesting error
• The available number of buffers was exceeded. (There are
Table.
10 buffers for numeric values and 64 buffers for calculation
instructions).
ERROR 04: Data over
Table: Use u and d to select a row in the
• Data items exceeded 100 in STAT mode.
+
−
×
÷
+ −×÷
,
,
,
, or
).
Alert Messages
Table: Use l and r to select the order type ("Serial"
Cannot delete!
• The selected item cannot be deleted by pressing N or
×
@ y in the WriteView editor.
Table (random order only),
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 deﬁ nable memory (D1 to
" appears and the next question
D4) cannot be called.
Ex. An attempt was made to recall a statistical variable from
"appears and the same question
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.
Calculation Ranges
• Within the ranges speciﬁ ed, this calculator is accurate to
±
1 of the 10th digit of the mantissa. However, a calculation
error increases in continuous calculations due to
Current question/
accumulation of each calculation error. (This is the same
Total questions
y
for
are performed internally.)
Question
Additionally, a calculation error will accumulate and
become larger in the vicinity of inﬂ ection points and
⋮
singular points of functions.
• Calculation ranges
±
10
See step 6 above.
If the absolute value of an entry or a ﬁ nal or intermediate
result of a calculation is less than 10
⋮
considered to be 0 in calculations and in the display.
Display of results using r
Number of questions
Calculation results may be displayed using r when all of the
Operator type
following conditions are met:
• When intermediate and ﬁ nal calculation results are displayed
Percentage correct
in the following form:
Correct answers
a P b
±
⎯
• When each coefﬁ cient falls into the following ranges:
Total remaining
≤
1
questions
≤
1
Question
• When the number of terms in the intermediate and ﬁ nal
calculation results is one or two.
⋮
Note: The result of two fractional terms that include r will be
See step 6 above.
BATTERY REPLACEMENT
Notes on Battery Replacement
⋮
Improper handling of batteries can cause electrolyte leakage or
explosion. Be sure to observe the following handling rules:
Multiplicand
• Make sure the new battery is the correct type.
Order type
• When installing, orient the battery properly as indicated in the
calculator.
Percentage correct
• The battery is factory-installed before shipment, and may
Correct answers
be exhausted before it reaches the service life stated in the
speciﬁ cations.
+
+
Notes on erasure of memory contents
Addition operator: "0
0" to "20
20"
−
−
When the battery is replaced, the memory contents are
Subtraction operator: "0
0" to "20
20"; answers are
erased. Erasure can also occur if the calculator is defective
positive integers and 0.
or when it is repaired. Make a note of all important memory
×
×
Multiplication operator: "1
0" or "0
1" to "12 × 12"
contents in case accidental erasure occurs.
÷
÷
Division operator: "0
1" to "144
12"; answers are
positive integers from 1 to 12 and 0, dividends of up to
When to Replace the Battery
144, and divisors of up to 12.
EL-W531/W531H/W531HA/W535: If the display has poor
Mixed operators: Questions within all the above
contrast even after adjusting the display contrast, the battery
ranges are displayed.
requires replacement.
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.
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 ﬂ uid from a leaking battery come in contact with your
skin or clothes, immediately wash with clean water.
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)
m
• abs value
4, etc.) ② Functions preceded by their argument
y
x
x
r ④ Implied multiplication of a memory
2
, n!, etc.) ③
,
Random Function
The random function has four settings. (This function cannot
⎯
1
, etc.)
4
×
÷
+
−
=
be selected while using the N-base function.) To generate
,
⑨
,
⑩ AND ⑪ OR, XOR, XNOR ⑫
,
further random numbers in succession, press e. Press
−
θ
xy
r
,
⇒
M, ▶DEG, ▶RAD, ▶GRAD, DATA, CD,
,
,
j to exit.
Random numbers
A pseudo-random number, with three signiﬁ cant digits from 0
up to 0.999, can be generated by pressing @ w 0
e.
Note: In the WriteView editor, the result will be a fraction or 0.
Random dice
To simulate a die-rolling, a random integer between 1 and 6
can be generated by pressing @ w 1 e.
Random coin
To simulate a coin ﬂ ip, 0 (heads) or 1 (tails) can be randomly
generated by pressing @ w 2 e.
Random integer
An integer between 0 and 99 can be generated randomly by
pressing @ w 3 e.
Angular Unit Conversions
Each time @ ] is pressed, the angular unit changes in
sequence.
Memory Calculations
Memory calculations can be performed in NORMAL and STAT
modes.
J 0 0 (default)
Temporary memories (A–F, X and Y)
Press x and a variable key to store a value in memory.
Press t and a variable key to recall the value from that
3
memory. To place a variable in an equation, press ; and a
variable key.
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.
Notes:
• Calculation results from the functions indicated below are
automatically stored in the X or Y memories replacing any
existing values.
≤
≤
r
•
| x |
9,999,999,999
≤
≤
| x |
9,999,999,999
• Two
STAT mode: X memory (1:), Y memory (2:)
• Use of t or ; will recall the value stored in memory
using up to 14 digits.
Deﬁ nable memories (D1–D4)
You can store functions or operations in deﬁ nable memories
(D1–D4).
• To store a function or operation, press x, followed by
a deﬁ nable 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.
• Any functions or operations that are stored in a deﬁ nable
memory will be replaced when you save a new one into that
memory.
• When displaying and correcting a data set in STAT mode,
you cannot store functions or operations in deﬁ nable
memories.
Chain Calculations
The previous calculation result can be used in the subsequent
4
calculation. However, it cannot be recalled after entering
multiple instructions.
Fraction Calculations
5
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.
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, ﬁ rst convert it
by pressing @ :.
• 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.
• Explosion risk may be caused by incorrect handling.
100
.
• Do not throw batteries into a ﬁ re as they may explode.
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)
EL-W531H/W531HA: Remove the used battery.
5. EL-W531/W531G/W535: Install one new battery. Make sure
+
the "
EL-W531H/W531HA: Install one new battery. First insert the
−
18
"
" side toward the spring. (Fig. 3)
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.
Fig. 1
19
Automatic Power Off Function
This calculator will turn itself off to save battery power if no
key is pressed for approximately 10 minutes.
x
x
r, n!, e
x
,
, ln, etc., where continuous calculations
SPECIFICATIONS
Calculation features: Scientiﬁ c calculations, statistical
Drill features:
Display:
−
±
×
99
to
9.999999999
10
99
and 0.
Display of calculation results:
−
99
, the value is
Internal calculations: Mantissas of up to 14 digits
Pending operations:
Power source:
c P d
±
⎯
e
f
<
<
<
≤
<
a
100; 1
b
1,000; 0
c
100;
<
≤
<
≤
<
d
1,000; 1
e
100; 1
f
100
Power consumption:
reduced to a common denominator.
Operating time:
(varies according to
use and other factors)
Operating temperature: 0°C–40°C (32°F–104°F)
External dimensions: 79.6 mm (W)
Weight:
Accessories:
FOR MORE INFORMATION ABOUT SCIENTIFIC CALCULATORS
Visit our Web site.
http://sharp-world.com/calculator/
6
7
8
θ
xy
θ
r
x
y
,
: X memory (
or
), Y memory (
or
)
x
´ values from a quadratic regression calculation in
9
10
" side is facing up.
Fig. 2
Fig. 3
calculations, etc.
Math Drill and Multiplication Table
×
96
32 dot matrix liquid crystal display
Mantissa: 10 digits
Exponent: 2 digits
64 calculations 10 numeric values
EL-W531/W535
1.5 V ... — (DC): Alkaline battery (LR44 or
×
equivalent)
1
EL-W531G
Built-in solar cells
1.5 V ... — (DC): Backup battery
×
(Alkaline battery (LR44 or equivalent)
1)
EL-W531H/W531HA
1.5 V ... — (DC): Heavy duty manganese
×
battery (size AAA or R03)
1
EL-W531/W531H/W531HA/W535
0.00011 W
EL-W531/W535
Approx. 3,000 hours when continuously
displaying 55555. at 25°C (77°F)
EL-W531G
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)
×
×
161.5 mm (D)
15.5 mm (H)
×
×
3-1/8" (W)
6-11/32" (D)
5/8" (H)
EL-W531/W535
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)
×
Battery
1 (installed), operation
manual, and hard case
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