Memory clear key
• Equations that have one result require an additional eleven
DISPLAY
Functions
6
Press @ P to display the menu.
characters' worth of memory to store in order to hold the result.
ENGLISH
• Refer to the calculation examples for each function.
• In addition to the amount of memory needed to store an
Symbol
• To initialize the display settings,
• In the Line editor, the following symbols are used:
press 0. The parameters set
equation, the WriteView editor will require a certain amount for
•
: to indicate an expression's power. (m, @ ",
the sake of display.
as follows:
@ Y)
• Equations also include calculation ending instructions, such as
• Angular unit: DEG
=
•
: to separate integers, numerators, and denominators.
"
".
• Display notation: NORM1
Dot
(W, @ k)
SCIENTIFIC CALCULATOR
• N-base: DEC
EL-W531
matrix
• When using @ O or @ W in the Line editor,
Priority Levels in Calculation
display
• To clear all variables and memories (A−F, M, X, Y, D1−D4, ANS,
values are entered in the following way:
EL-W531G
This calculator performs operations according to the following
and STAT) at once, press 1 0.
• logn (base, value)
priority:
• To RESET the calculator, press 2 0. The RESET
EL-W531H
m
• abs value
① Fractions (1
4, etc.) ② Functions preceded by their argument
operation will erase all data stored in memory and restore the
−
Mantissa
Exponent
x
x
y
x
x
r ④ Implied multiplication of a memory
EL-W531HA
(
1
,
2
, n!, etc.) ③
,
calculator's default settings.
Random Function
value (2Y, etc.) ⑤ Functions followed by their argument (sin, cos,
• During actual use, not all symbols are displayed at the same
EL-W535
The random function has four settings. (This function cannot
MODEL
⎯
1
etc.) ⑥ Implied multiplication of a function (2sin 30, A
, etc.)
time.
ENTERING, DISPLAYING, AND EDITING THE EQUATION
4
1
×
÷
+
−
=
be selected while using the N-base function.) To generate
⑦ nCr, nPr ⑧
,
⑨
,
⑩ AND ⑪ OR, XOR, XNOR ⑫
,
• Only the symbols required for the usage under instruction are
OPERATION MANUAL
further random numbers in succession, press e. Press
+
−
θ
xy
r
M
, M
,
⇒
M, ▶DEG, ▶RAD, ▶GRAD, DATA, CD,
,
,
The WriteView Editor
shown in the display and calculation examples of this manual.
j to exit.
and other calculation ending instructions
/
:
Indicates that some contents are hidden in the
Entry and display
• If parentheses are used, parenthesized calculations have
Random numbers
/
directions shown.
In the WriteView editor, you can
precedence over any other calculations.
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA
A pseudo-random number, with three signiﬁ cant digits from 0
2ndF:
Appears when @ is pressed, indicating that the
enter and display fractions or certain
07BGK (TINSE1278EHZZ)
up to 0.999, can be generated by pressing @ w 0
functions shown in orange are enabled.
functions as you would write them.
INITIAL SET UP
e.
Indicates that H has been pressed and the
Notes:
HYP:
Note: In the WriteView editor, the result will be a fraction or 0.
hyperbolic functions are enabled. If @ > is
• The WriteView editor can only be
Mode Selection
used in NORMAL mode.
Random dice
pressed, the symbols "2ndF HYP" appear, indicating
NORMAL mode: b 0 (default)
• If the equation grows too large, it may extend off the edge of the
To simulate a die-rolling, a random integer between 1 and 6
INTRODUCTION
that inverse hyperbolic functions are enabled.
Used to perform arithmetic operations and function calculations.
can be generated by pressing @ w 1 e.
display after you obtain the result. If you want to see the entire
ALPHA: Indicates that ;, x or t has been pressed,
Thank you for purchasing the SHARP Scientiﬁ c Calculator
equation, press l or r to return to the editing screen.
and entry (recall) of memory contents and recall of
STAT mode: b 1
Random coin
Model EL-W531/W531G/W531H/W531HA/W535.
statistics can be performed.
Displaying calculation results
About the calculation examples (including some formulas
Used to perform statistical operations.
To simulate a coin ﬂ ip, 0 (heads) or 1 (tails) can be randomly
DEG/RAD/GRAD: Indicates angular units.
generated by pressing @ w 2 e.
and tables), refer to the reverse side of this English manual.
When possible, calculation results will be displayed using
π
DRILL mode: b 2
fractions, r, and
. When you press U, the display will cycle
Refer to the number on the right of each title in the
BUSY: Appears during the execution of a calculation.
Random integer
Used to practice math and multiplication table drills.
manual for use.
through the following display styles:
W-VIEW: Indicates that the WriteView editor is selected.
π
An integer between 0 and 99 can be generated randomly by
After reading this manual, store it in a convenient location for
• Mixed fractions (with or without
)
improper fractions (with
M:
Indicates that a numerical value is stored in the
π
pressing @ w 3 e.
or without
)
decimal numbers
future reference.
SET UP Menu
π
independent memory (M).
Notes:
• Proper fractions (with or without
)
decimal numbers
Angular Unit Conversions
Press J to display the SET UP
7
ENG/SCI/FIX/N2/N1: Indicates the notation used to display a
• Some of the models described in this manual may not be
• Irrational numbers (square roots, fractions made using square
menu.
Each time @ ] is pressed, the angular unit changes in
value and changes by SET UP menu. N1 is displayed
available in some countries.
roots)
decimal numbers
Press j to exit the SET UP menu.
sequence.
on-screen as "NORM1", and N2 as "NORM2".
• This product uses a period as a decimal point.
Notes:
Determination of the angular unit
• In the following cases, calculation results may be displayed
Memory Calculations
8
Operational Notes
using r:
The following three angular units (degrees, radians, and grads)
BEFORE USING THE CALCULATOR
Memory calculations can be performed in NORMAL and STAT
• Do not carry the calculator around in your back pocket, as it
• Arithmetic operations and memory calculations
can be speciﬁ ed.
modes.
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
J 0 0 (default)
• Trigonometric calculations
DEG (°):
Temporary memories (A–F, X and Y)
back), with the tip of a ball-point pen or similar object.
and is particularly fragile.
RAD (rad): J 0 1
• In trigonometric calculations, when
Entry value
Press x and a variable key to store a value in memory.
• Keep the calculator away from extreme heat such as on a
GRAD (g): J 0 2
entering values such as those in
Adjusting the Display Contrast
Press t and a variable key to recall the value from that
DEG
multiples of 15
car dashboard or near a heater, and avoid exposing it to
the table to the right, results may be
Press J 3, then + or & to adjust the contrast.
Selecting the display notation and decimal places
3
memory. To place a variable in an equation, press ; and a
shown using r.
excessively humid or dusty environments.
⎯
1
π
RAD
multiples of
Press j to exit.
Five display notation systems are used to display calculation
12
variable key.
• Since this product is not waterproof, do not use it or store
• Calculation results may extend off
⎯
50
results: Two settings of Floating point (NORM1 and NORM2),
GRAD
multiples of
it where ﬂ uids, for example water, can splash onto it.
Power On and Off
the edges of the screen. You can
Independent memory (M)
3
Fixed decimal point (FIX), Scientiﬁ c notation (SCI), and
Raindrops, water spray, juice, coffee, steam, perspiration,
see those parts by pressing l
Press j to turn the calculator on. The data that was on-
In addition to all the features of temporary memories, a value
Engineering notation (ENG).
etc. will also cause malfunction.
or r (depending on whether the left or right portion is
screen when the power was turned off will appear on the display.
can be added to or subtracted from an existing memory value.
• When J 1 0 (FIX) or J 1 2 (ENG) is
• Clean with a soft, dry cloth. Do not use solvents or a wet cloth.
hidden).
Press @ o to turn it off.
Press j x M to clear the independent memory (M).
pressed, "TAB(0–9)?" will be displayed and the number of
• Do not drop it or apply excessive force.
• Improper/proper fractions will be converted to and displayed as
decimal places (TAB) can be set to any value between 0 and 9.
Last answer memory (ANS)
Key Notations Used in this Manual
• Never dispose of batteries in a ﬁ re.
decimal numbers if the number of digits used in their expression
• When J 1 1 (SCI) is pressed, "SIG(0–9)?" will be
The calculation result obtained by pressing = or any other
• Keep batteries out of the reach of children.
In this manual, key operations are described as follows:
is greater than nine. In the case of mixed fractions, the maximum
displayed and the number of signiﬁ cant digits can be set to any
calculation ending instruction is automatically stored in the
• This product, including accessories, may change due to
number of displayable digits (including integers) is eight.
x
e
: @ "
value between 0 and 9. Entering 0 will set a 10-digit display.
To specify
last answer memory.
upgrading without prior notice.
• If the number of digits in the denominator of a fractional result
π
To specify ln: i
that uses
is greater than three, the result is converted to and
Setting the ﬂ oating point number system in scientiﬁ c notation
Notes:
NOTICE
To specify E: ; E
displayed as a decimal number.
Two settings are used to display a ﬂ oating-point number: NORM1
• Calculation results from the functions indicated below are
• SHARP strongly recommends that separate permanent
(the default) and NORM2. A number is automatically displayed in
automatically stored in the X or Y memories replacing any
• Functions that are printed in orange above the key require
written records be kept of all important data. Data may be
The Line Editor
existing values.
@ to be pressed ﬁ rst before the key. When you specify the
scientiﬁ c notation outside a preset range:
lost or altered in virtually any electronic memory product
≤
≤
θ
xy
θ
r
r
x
y
Entry and display
• NORM1 (J 1 3): 0.000000001
•
,
: X memory (
or
), Y memory (
or
)
memory, press ; ﬁ rst. Numbers for input values are not
| x |
9,999,999,999
under certain circumstances. Therefore, SHARP assumes
≤
≤
x
• NORM2 (J 1 4): 0.01
| x |
9,999,999,999
• Two
´ values from a quadratic regression calculation in
shown as keys, but as ordinary numbers.
In the Line editor, you can enter and
no responsibility for data lost or otherwise rendered
STAT mode: X memory (1:), Y memory (2:)
• Functions that are printed in gray adjacent to the keys are
display equations line by line.
unusable whether as a result of improper use, repairs,
Selecting the editor
• Use of t or ; will recall the value stored in memory
effective in speciﬁ c modes.
Notes:
defects, battery replacement, use after the speciﬁ ed
Two editors are available in NORMAL mode:
using up to 14 digits.
• Up to three lines of text may be
battery life has expired, or any other cause.
• The WriteView editor (W-VIEW): J 2 0 (default)
The WriteView and Line Editors
viewed on the screen at one time.
• SHARP will not be liable nor responsible for any incidental
Deﬁ nable memories (D1–D4)
• The Line editor (LINE): J 2 1
This calculator has the following two editors in NORMAL mode:
• If the length of the equation exceeds three lines, parts of it may
or consequential economic or property damage caused
You can store functions or operations in deﬁ nable memories
WriteView and Line. You can select between them in the SET UP
Adjusting the display contrast
be hidden from view after calculation. If you want to see the
by misuse and/or malfunctions of this product and its
(D1–D4).
menu.
rest of the equation, press l or r to return to the editing
Press J 3, then + or & to adjust the contrast.
peripherals, unless such liability is acknowledged by law.
• To store a function or operation, press x, followed by
screen.
Press j to exit.
a deﬁ nable memory key (I, J, K, or L),
♦ Press the RESET switch (on the back), with the tip of a
• In the Line editor, calculation results are displayed in decimal
Insert and overwrite entry methods
followed by the operation you want to store. Menu-related
form.
ball-point pen or similar object, only in the following cases.
operations, such as J, cannot be stored. Press j to
When using the Line editor, you can change the entry method
Do not use an object with a breakable or sharp tip. Note that
return to the previous display.
from "INSERT" (the default) to "OVERWRITE".
Editing the Equation
pressing the RESET switch erases all data stored in memory.
• To call a stored function or operation, press the
After you switch to the overwrite method (by pressing J 4
Just after obtaining an answer, pressing l brings you to
The WriteView editor (default)
The Line editor
• When using for the ﬁ rst time
corresponding memory key. Calling a stored function will do
1), the triangular cursor will change to a rectangular one, and
Note: In certain calculation examples, where you see the o
the end of the equation and pressing r brings you to the
• After replacing the battery
nothing if the function that is called would be unusable in the
beginning. Press l, r, u, or d to move the
the number or function underneath it will be overwritten as you
symbol, the key operations and calculation results are
• To clear all memory contents
current context.
make entries.
cursor. Press @ l or @ r to jump the cursor to the
shown as they would appear in the Line editor.
• When an abnormal condition occurs and all keys are
• Any functions or operations that are stored in a deﬁ nable
beginning or the end of the equation.
inoperative
memory will be replaced when you save a new one into that
Clearing the Entry and Memories
In the WriteView editor, you can use u and d to move the
SCIENTIFIC CALCULATIONS
If service should be required on this calculator, use only a
memory.
cursor up and down—between the numerator and denominator,
SHARP servicing dealer, SHARP approved service facility, or
Operation
Entry
A–F*
1
,
D1–D4*
2
ANS STAT*
3
• Press b 0 to select NORMAL mode.
• When displaying and correcting a data set in STAT mode,
for example.
SHARP repair service where available.
(Display)
M, X, Y
• In each example, press j to clear the display ﬁ rst. Unless
you cannot store functions or operations in deﬁ nable
Back space and delete key
otherwise speciﬁ ed, calculation examples are performed in the
j
○
×
×
×
×
memories.
Hard Case
WriteView editor with the default display settings (@ P
To delete a number or function, move the cursor to the right of it,
@ Z
○
×
×
○
○
Chain Calculations
9
0).
then press N. You can also delete a number or function that
Mode selection (b)
○
×
×
×
×*
5
the cursor is directly over by pressing @ y.
The previous calculation result can be used in the subsequent
Arithmetic Operations
4
@ P 0*
calculation. However, it cannot be recalled after entering
4
○
×
×
×
×
Multi-line Playback Function
2
• The closing parenthesis ) just before = or m may
multiple instructions.
@ P 1 0*
4
○
○
○
○
○
be omitted.
This calculator is equipped with a function to recall previous
@ P 2 0*
4
○
○
○
○
○
Fraction Calculations
10
equations and answers in NORMAL mode. A maximum of 340
Constant Calculations
5
Remove the hard case, holding it with your ﬁ ngers in the
○
○
○
○
○
Arithmetic operations and memory calculations can be
RESET switch
characters can be stored in memory. When the memory is full,
• In constant calculations, the addend becomes a constant.
performed using fractions. In NORMAL mode, conversion
positions shown below.
stored equations will be deleted to make room, starting with the
○: Clear
×
: Retain
Subtraction and division are performed in the same manner.
between a decimal number and a fraction can be performed
oldest.
*1 Press j x and then choose a memory to clear one
For multiplication, the multiplicand becomes a constant.
by pressing U.
Pressing u will display the previous equation. Further
variable memory.
• In constant calculations, constants will be displayed as K.
pressing u will display preceding equations (after returning to
Notes:
*2 Deﬁ nable memory. See "Memory Calculations".
• Improper/proper fractions will be converted to and displayed
the previous equation, press d to view equations in order). In
*3 Statistical data (entered data)
as decimal numbers if the number of digits used in their
addition, @ u can be used to jump to the oldest equation,
*4 See "Memory clear key".
and @ d to jump to the newest one.
expression is greater than nine. In the case of mixed
*5 Cleared when changing between sub-modes in STAT mode.
fractions, the maximum number of displayable digits
• To edit an equation after recalling it, press l or r.
(including integers) is eight.
• The multi-line memory will be cleared by the following operations:
• To convert a sexagesimal value to a fraction, ﬁ rst convert it
@ Z , mode change, RESET, N-base conversion,
by pressing @ :.
angular unit conversion, editor change (J 2 0 or
J 2 1), and memory clear (@ P 1 0).
Binary, Pental, Octal, Decimal, and Hexadecimal
x –
Error codes and error types
• If the product is not to be used for some time, to avoid
DRILL MODE
x
Mean of samples (
data)
damage to the unit from a leaking battery, remove it and
Operations (N-base)
11
ERROR 01: Syntax error
store in a safe place.
sx
x
Conversions can be performed between N-base numbers
Sample standard deviation (
data)
Math Drill: b 2 0
• An attempt was made to perform an invalid operation.
• Do not leave an exhausted battery inside the product.
in NORMAL mode. The four basic arithmetic operations,
Math operation questions with positive integers and 0 are
σ
Ex. 2 + & 5 =
x
x
Population standard deviation (
data)
• Keep batteries out of the reach of children.
calculations with parentheses, and memory calculations can
displayed randomly. It is possible to select the number of
①
• An exhausted battery left in the calculator may leak and
also be performed, along with the logical operations AND,
ERROR 02: Calculation error
questions and operator type.
n
Number of samples
damage the calculator.
OR, NOT, NEG, XOR, and XNOR on binary, pental, octal, and
• The absolute value of an intermediate or ﬁ nal calculation
×
Multiplication Table (
Table): b 2 1
Σ
• Explosion risk may be caused by incorrect handling.
x
x
result equals or exceeds 10
100
.
hexadecimal numbers.
Sum of samples (
data)
Questions from each row of the multiplication table (1 to 12) are
• Do not throw batteries into a ﬁ re as they may explode.
Conversion to each system is performed with the following keys:
• An attempt was made to divide by zero (or an intermediate
Σ
x
x
2
displayed serially or randomly.
@ z ("BIN" appears), @ r ("PEN" appears),
Sum of squares of samples (
data)
calculation resulted in zero).
Replacement Procedure
@ g ("OCT" appears), @ h ("HEX" appears),
–
• The calculation ranges were exceeded while performing
y
y
To exit DRILL mode, press b and select another mode.
Mean of samples (
data)
1. Turn the power off by pressing @ o.
@ / ("BIN", "PEN", "OCT", and "HEX" disappear)
calculations.
2. Remove the two screws. (Fig. 1)
×
Note: The hexadecimal numbers A–F are entered by pressing
s
y
Using Math Drill and
Table
y
Sample standard deviation (
data)
ERROR 03: Nesting error
3. Slide the battery cover slightly and lift it to remove.
A
B
C
D
E
F
1. Press b 2 0 for Math Drill or b 2 1 for
m
, *
, A
, l
, i
, and H
.
σy
• The available number of buffers was exceeded. (There are
4. EL-W531/W531G/W535: Remove the used battery by
Population standard deviation (
y
data)
×
Table.
10 buffers for numeric values and 64 buffers for calculation
prying it out with a ball-point pen or other similar pointed
In the binary, pental, octal, and hexadecimal systems,
2. Math Drill: Use u and d to select the number of
Σy
y
instructions).
fractional parts cannot be entered. When a decimal number
Sum of samples (
data)
device. (Fig. 2)
questions (25, 50, or 100).
EL-W531H/W531HA: Remove the used battery.
having a fractional part is converted into a binary, pental,
Σy
×
ERROR 04: Data over
2
Sum of squares of samples (
y
data)
Table: Use u and d to select a row in the
5. EL-W531/W531G/W535: Install one new battery. Make sure
octal, or hexadecimal number, the fractional part will be
②
• Data items exceeded 100 in STAT mode.
+
multiplication table (1 to 12).
truncated. Likewise, when the result of a binary, pental, octal,
the "
" side is facing up.
Σ
x
y
x
y
Sum of products of samples (
,
)
3. Math Drill: Use l and r to select the operator type for
EL-W531H/W531HA: Install one new battery. First insert the
or hexadecimal calculation includes a fractional part, the
+
−
×
÷
+ −×÷
questions (
,
,
,
, or
).
Alert Messages
−
r
18
"
" side toward the spring. (Fig. 3)
fractional part will be truncated. In the binary, pental, octal,
Correlation coefﬁ cient
×
Table: Use l and r to select the order type ("Serial"
6. Replace the cover and screws.
and hexadecimal systems, negative numbers are displayed as
a
Cannot delete!
Coefﬁ cient of regression equation
or "Random").
7. Press the RESET switch (on the back) with the tip of a
a complement.
• The selected item cannot be deleted by pressing N or
4. Press e to start.
ball-point pen or similar object.
×
b
Coefﬁ cient of regression equation
@ y in the WriteView editor.
Time, Decimal, and Sexagesimal Calculations
When using Math Drill or
Table (random order only),
12
8. Adjust the display contrast. See "Adjusting the Display
Ex. * 5 r A l N
questions are randomly selected and will not repeat except
Conversion between decimal and sexagesimal numbers can be
Contrast".
c
Coefﬁ cient of quadratic regression equation
In this example, delete the exponent before attempting to
by chance.
performed. In addition, the four basic arithmetic operations and
• Make sure that the display appears as shown below. If the
delete the parentheses.
5. Enter your answer. Press j or N to clear the entered
memory calculations can be performed using the sexagesimal
• Use ; and t to perform a variable calculation in STAT
display does not appear as shown, remove the battery,
number and then enter the correct answer.
system. Notation for sexagesimal is as follows:
reinstall it, and check the display once again.
mode.
Cannot call!
6. Press e.
• U does not function in STAT mode.
• The function or operation stored in deﬁ nable memory (D1 to
• If the answer is correct, "
" appears and the next question
D4) cannot be called.
Data Entry and Correction
16
is displayed.
Degree
Second
Ex. An attempt was made to recall a statistical variable from
Minute
Before entering new data, clear the memory contents.
• If the answer is wrong, "
"appears and the same question
within NORMAL mode.
is displayed. This will be regarded as an incorrect answer.
Coordinate Conversions
13
Data entry
• If you press e without entering an answer, the correct
Buffer full!
• Before performing a calculation, select the angular unit.
Single-variable data
• The equation (including any calculation ending instructions)
answer is displayed and then the next question is displayed.
Fig. 1
Fig. 2
Fig. 3
• The calculation result is automatically stored in the X and Y
Data _
exceeded its maximum input buffer (159 characters in the
This will be regarded as an incorrect answer.
θ
r
x
y
memories (
or
in X memory, and
or
in Y memory).
Data H frequency _ (To enter multiples of the same
WriteView editor or 161 characters in the Line editor). An
7. Continue answering the series of questions by entering the
• The results of coordinate conversions will be displayed as
data)
equation may not exceed its maximum input buffer.
answer and pressing e.
decimal numbers even in the WriteView editor.
Two-variable data
8. After you ﬁ nish, press e and the number and percentage
x
H data
y
_
Data
Calculation Ranges
of correct answers are displayed.
19
Data
x
H data
y
H frequency _ (To enter multiples
9. Press e to return to the initial screen for your current drill.
• Within the ranges speciﬁ ed, this calculator is accurate to
Automatic Power Off Function
of the same data
x
and
y
)
±
1 of the 10th digit of the mantissa. However, a calculation
Math Drill sample
This calculator will turn itself off to save battery power if no
Note: Up to 100 data items can be entered. With the single-
error increases in continuous calculations due to
key is pressed for approximately 10 minutes.
variable data, a data item without frequency assignment
Current question/
Rectangular coord.
Polar coord.
accumulation of each calculation error. (This is the same
is counted as one data item, while an item assigned with
Total questions
y
x
x
r, n!, e
x
for
,
, ln, etc., where continuous calculations
SPECIFICATIONS
frequency is stored as a set of two data items. With the
Modify Function
14
are performed internally.)
two-variable data, a set of data items without frequency
Question
Decimal calculation results are internally obtained in scientiﬁ c
Additionally, a calculation error will accumulate and
Calculation features: Scientiﬁ c calculations, statistical
assignment is counted as two data items, while a set of
notation, with up to 14 digits in the mantissa. However, since
become larger in the vicinity of inﬂ ection points and
⋮
calculations, etc.
items assigned with frequency is stored as a set of three
calculation results are displayed in the form designated by the
singular points of functions.
Drill features:
Math Drill and Multiplication Table
data items.
display notation and the number of decimal places indicated,
• Calculation ranges
×
Display:
96
32 dot matrix liquid crystal display
±
−
±
×
the internal calculation result may differ from that shown in the
Data correction
10
99
to
9.999999999
10
99
and 0.
See step 6 above.
Display of calculation results:
display. By using the modify function (@ n), the internal
Correction before pressing _ immediately after a data entry:
If the absolute value of an entry or a ﬁ nal or intermediate
Mantissa: 10 digits
−
value is converted to match that of the display, so that the
99
Delete incorrect data with j, then enter the correct data.
result of a calculation is less than 10
, the value is
⋮
Exponent: 2 digits
displayed value can be used without change in subsequent
considered to be 0 in calculations and in the display.
Correction after pressing _:
operations.
Use u and d to display the previously entered data set.
Internal calculations: Mantissas of up to 14 digits
Display of results using r
• When using the WriteView editor, if the calculation result is
Press d to display the data set in ascending (oldest ﬁ rst)
Pending operations:
64 calculations 10 numeric values
Number of questions
Calculation results may be displayed using r when all of the
displayed using fractions or irrational numbers, press U
order. To reverse the display order to descending (latest ﬁ rst),
Operator type
Power source:
EL-W531/W535
following conditions are met:
to convert it to decimal form ﬁ rst.
press the u key. Press @ u or @ d to jump
1.5 V ... — (DC): Alkaline battery (LR44 or
• When intermediate and ﬁ nal calculation results are displayed
×
the cursor to the beginning or end of the data set.
equivalent)
1
Percentage correct
in the following form:
STATISTICAL CALCULATIONS
Each data set is displayed with "X:", "Y:", or "F:".
Correct answers
EL-W531G
a P b
c P d
±
±
×
⎯
⎯
Built-in solar cells
Table sample
Statistical calculations can be performed in STAT mode.
e
f
1.5 V ... — (DC): Backup battery
Data set number
There are eight sub-modes within STAT mode. Press b
• When each coefﬁ cient falls into the following ranges:
Total remaining
×
Data
x
(Alkaline battery (LR44 or equivalent)
1)
≤
<
<
<
≤
<
1, then press the number key that corresponds to your
1
a
100; 1
b
1,000; 0
c
100;
questions
Frequency
EL-W531H/W531HA
≤
<
≤
<
≤
<
choice:
1
d
1,000; 1
e
100; 1
f
100
1.5 V ... — (DC): Heavy duty manganese
0 (S#a# 0 [SD]): Single-variable statistics
Question
• When the number of terms in the intermediate and ﬁ nal
×
battery (size AAA or R03)
1
1 (S#a# 1 [LINE]): Linear regression
calculation results is one or two.
Data set number
⋮
Power consumption:
EL-W531/W531H/W531HA/W535
2 (S#a# 2 [QUAD]): Quadratic regression
Note: The result of two fractional terms that include r will be
Data
x
0.00011 W
3 (S#a# 3 [E_EXP]): Euler exponential regression
Data
y
reduced to a common denominator.
4 (S#a# 4 [LOG]): Logarithmic regression
Frequency
Operating time:
EL-W531/W535
(varies according to
Approx. 3,000 hours when continuously
5 (S#a# 5 [POWER]): Power regression
See step 6 above.
BATTERY REPLACEMENT
Display and move the cursor to the data item to be modiﬁ ed
use and other factors)
displaying 55555. at 25°C (77°F)
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
EL-W531G
Notes on Battery Replacement
⋮
_ or e.
Approx. 3,000 hours when continuously
Improper handling of batteries can cause electrolyte leakage or
Statistical Calculations and Variables
• To delete a data set, display and move the cursor to an item
15
displaying 55555. at 25°C (77°F), using
explosion. Be sure to observe the following handling rules:
of the data set to delete by using u and d, then press
Multiplicand
the alkaline battery only
The following statistics can be obtained for each statistical
• Make sure the new battery is the correct type.
@ #. The data set will be deleted.
Order type
calculation (refer to the table below):
EL-W531H/W531HA
• When installing, orient the battery properly as indicated in the
• To add a new data set, press j to exit the display of
Approx. 17,000 hours when continuously
calculator.
Single-variable statistical calculation
previously entered data and input the values, then press _.
Percentage correct
displaying 55555. at 25°C (77°F)
• The battery is factory-installed before shipment, and may
Statistics of ①.
Correct answers
Operating temperature: 0°C–40°C (32°F–104°F)
Statistical Calculation Formulas
be exhausted before it reaches the service life stated in the
17
×
×
Linear regression calculation
External dimensions: 79.6 mm (W)
Ranges of Math Drill Questions
161.5 mm (D)
speciﬁ cations.
Statistics of ① and ②. In addition, the estimate of
y
Type
Regression formula
for a
15.5 mm (H)
The range of questions for each operator type is as follows.
×
×
x
y
x
y
given
(estimate
´) and the estimate of
for a given
+
+
Notes on erasure of memory contents
3-1/8" (W)
6-11/32" (D)
5/8" (H)
+
Addition operator: "0
0" to "20
20"
=
+ bx
y
a
Linear
x
(estimate
´).
−
−
When the battery is replaced, the memory contents are
Weight:
EL-W531/W535
]
Subtraction operator: "0
0" to "20
20"; answers are
=
+ bx +
Approx. 100 g (0.22 lb) (including battery)
erased. Erasure can also occur if the calculator is defective
Quadratic
y
a
cx
2
Quadratic regression calculation
positive integers and 0.
or when it is repaired. Make a note of all important memory
EL-W531G
a
b
c
>
×
×
Statistics of ① and ②, and coefﬁ cients
,
,
in the quadratic
Multiplication operator: "1
0" or "0
1" to "12 × 12"
=
⋅
Euler exponential
y
a
e
b
x
contents in case accidental erasure occurs.
Approx. 102 g (0.23 lb) (including battery)
y =
+ b
+
a
x
cx
regression formula (
2
). (For quadratic
)
÷
÷
Division operator: "0
1" to "144
12"; answers are
EL-W531H/W531HA
r
=
+ b ⋅
regression calculations, no correlation coefﬁ cient (
) can be
y
a
x
Logarithmic
ln
positive integers from 1 to 12 and 0, dividends of up to
Approx. 107 g (0.24 lb) (including battery)
x
When to Replace the Battery
obtained.) When there are two
´ values, each value will be
144, and divisors of up to 12.
×
Accessories:
=
⋅
Battery
1 (installed), operation
Power
y
a
x
b
displayed with "1:" or "2:", and stored separately in the X and
EL-W531/W531H/W531HA/W535: If the display has poor
+]>)
Mixed operators: Questions within all the above
manual, and hard case
contrast even after adjusting the display contrast, the battery
Y memories.
1
=
+ b
⎯
Inverse
y
a
ranges are displayed.
x
requires replacement.
Euler exponential regression, logarithmic regression,
=
⋅ b
EL-W531G: If the display has poor contrast or nothing appears
FOR MORE INFORMATION ABOUT SCIENTIFIC CALCULATORS
y
a
x
General exponential
power regression, inverse regression, and general
ERRORS AND CALCULATION RANGES
on the display when j is pressed in dim lighting, even after
exponential regression calculations
Visit our Web site.
adjusting the display contrast, it is time to replace the battery.
An error will occur when:
Statistics of ① and ②. In addition, the estimate of
y
for a given
Errors
http://sharp-world.com/calculator/
• The absolute value of the intermediate result or calculation
x
x
y
and the estimate of
for a given
. (Since the calculator
Cautions
×
An error will occur if an operation exceeds the calculation ranges,
100
result is equal to or greater than 1
10
.
converts each formula into a linear regression formula before
or if a mathematically illegal operation is attempted. When an error
• Fluid from a leaking battery accidentally entering an eye could
• The denominator is zero.
actual calculation takes place, it obtains all statistics, except
occurs, pressing l or r automatically moves the cursor
result in serious injury. Should this occur, wash with clean
• An attempt is made to take the square root of a negative
a
b
coefﬁ cients
and
, from converted data rather than entered
back to the place in the equation where the error occurred. Edit
water and immediately consult a doctor.
number.
data.)
the equation or press j to clear the equation.
• Should ﬂ uid from a leaking battery come in contact with your
• No solution exists in the quadratic regression calculation.
skin or clothes, immediately wash with clean water.
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