Sharp WriteView EL-W535XG Operation Manuals

ENGLISH
SCIENTIFIC CALCULATOR
EL-W531TG
EL-W531TH
EL-W535XG
MODEL
OPERATION MANUAL
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA
16FSC(TINSEA152EHZZ)
B1096
INTRODUCTION
About the calculation examples (including some formulas
and tables), refer to the reverse side of this manual.
After reading this manual, store it in a convenient location for
future reference.
Note: Some of the models described in this manual may not be
available in some countries.
Operational Notes
• Do not carry the calculator around in your back pocket, as it
may break when you sit down. The display is made of glass
and is particularly fragile.
• Keep the calculator away from extreme heat such as on a
car dashboard or near a heater, and avoid exposing it to
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.
Avoid using a rough cloth or anything else that may cause
scratches.
• Do not drop it or apply excessive force.
• Never dispose of batteries in a fire.
• Keep batteries out of the reach of children.
• For the sake of your health, try not to use this product for long
periods of time. If you need to use the product for an extended
period, be sure to allow your eyes, hands, arms, and body
adequate rest periods (about 10–15 minutes every hour).
If you experience any pain or fatigue while using this product,
discontinue use immediately. If the discomfort continues,
please consult a doctor.
• This product, including accessories, may change due to
upgrading without prior notice.
NOTICE
• 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.
♦ 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, have the calculator
serviced in the region (country) where you purchased it.
Hard Case
DISPLAY
Dot
matrix
display
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.
Calculating the Greatest Common Divisor (GCD)
What is the GCD of
j 24
24 and 36?
@ = 36
= 12.
Calculating the Least Common Multiple (LCM)
What is the LCM of j 15
15 and 9?
@ ? 9
= 45.
Calculating Quotient and Remainder
18
• "Q" indicates "Quotient", and "R" indicates "Remainder".
• Pressing @ 6 cannot be followed by pressing a key for
another operation such as (+, –, ×, ÷), otherwise an error will
result.
• The quotient and remainder are shown in "NORM1" format.
If not all digits can be displayed in "NORM1" format, normal
division is performed.
Prime Factorization
19
In NORMAL mode, the calculation result can be shown as a
product of prime numbers.
• A positive integer greater than 2 and no more than 10 digits can
be factored into primes.
• A number that cannot be factored into a prime number with 3
digits or shorter is shown in parentheses.
• The calculation result of prime factorization is displayed
according to the editor setting (W-VIEW or LINE).
• The calculation result of prime factorization may extend off the
edges of the screen. You can see those parts by pressing l
or r. To jump to the left end or right end, press @ l
or @ r.
STATISTICAL CALCULATIONS
20 21
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 (SD): Single-variable statistics
1 (a+bx): Linear regression
2 (a+bx+cx ): Quadratic regression
2
3 (a•e^bx): Euler exponential regression
4 (a+b•lnx): Logarithmic regression
5 (a•x^b): Power regression
6 (a+b/x): Inverse regression
7 (a•b^x): General exponential regression
The statistical data input screen appears.
After entering statistical data from the input screen, press _
or j and close the input table. You can then check statistical
values from the STAT menu (; 8) and specify statistical
variables.
Data Entry and Correction
Data entry
Entry field
Single-variable data table Two-variable data table
• After entering the data, press e. The input is finalized and
x
the cursor moves to the next line. If data was not entered in an
y
or , 0 is entered, 1 is entered in FRQ (frequency), and the cursor
moves to the next line.
• You can use H to enter X and FRQ (or X, Y, and FRQ) at once.
• In the input table, up to 6 digits are displayed for each value,
including the sign and decimal point. Any values that exceed 6
digits in length are displayed in exponent notation.
• Up to 100 data items can be entered. With single-variable data,
a data item with an assigned frequency of one is counted as
one data item, while an item with an assigned frequency of 2
or higher is stored as a set of two data items. With two-variable
data, a set of data items with an assigned frequency of one is
counted as two data items, while a set of items with an assigned
frequency of 2 or higher is stored as a set of three data items.
• To execute statistical calculation, press _ or j and close
the input table.
Data correction
Use l, r, u, or d to move the cursor and select
the desired data. Press @ u or @ d to jump the
cursor to the beginning or end of the data.
Data correction
Move the cursor to the data that you want to correct, enter the
numeric value, and press e.
Data insertion
To insert a line in front of the cursor position, press .
; T
The initial values entered in the inserted data are 0 in x and y,
and 1 in FRQ.
Data deletion
To delete the entire line where cursor is positioned, press @ y.
Notes:
• In STAT mode, all statistical data will be erased if the submode
is changed or @ Z is pressed.
• In STAT mode, press _ to display the input table.
/
: Indicates that some contents are hidden in the directions
/ shown.
2ndF: Appears when @ is pressed, indicating that the
functions shown in the same color as @ 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.
ALPHA: Appears when ; is pressed, indicating that the
functions shown in the same color as ; are enabled.
Appears when x or t is pressed, and entry (recall)
of memory contents can be performed.
FIX/SCI/ENG/N1/N2: 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".
DEG/RAD/GRAD: Indicates angular units.
BUSY: Appears during the execution of a calculation.
W-VIEW: Indicates that the WriteView editor is selected.
M: Indicates that a numerical value is stored in the
independent memory (M).
BEFORE USING THE CALCULATOR
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.
Key Notations Used in this Manual
e x : @ "
To specify
To specify ln: i
To specify E: ; E
• Functions that are printed in gray adjacent to the keys are
effective in specific modes.
• The multiplication operator " " is differentiated from the letter "X"
in this manual as follows:
To specify the multiplication operator: k
To specify the letter "X": ; X
• 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.
• In each example, press j to clear the display first. Unless
otherwise specified, calculation examples are performed in the
WriteView editor (J 2 0 0) with the default display
settings.
Clearing the Entry and Memories
Operation Entry A–F, D1–D3 ANS STAT* 1
(Display) M, X, Y
О
Х Х Х Х
j
О Х Х О О
@ Z
О Х Х Х Х*
Mode selection (b) 2
О Х Х Х Х
@ P 0
О О О О О
@ P 1 0
* О О О О О
3
@ P 2 0
* 3 О О О О О
RESET switch
О
: Clear Х: Retain
*1 Statistical data (entered data)
*2 Cleared when changing between sub-modes in STAT mode.
*3 The RESET operation will erase all data stored in memory and
restore the calculator's default settings.
Memory clear key
Press @ P to display the menu.
• To initialize the display settings, press 0. The parameters set
as follows:
• Angular unit: DEG
• Display notation: NORM1
• N-base: DEC
• Recurring decimal: OFF
Mode Selection
NORMAL mode: b 0
Used to perform arithmetic operations and function calculations.
STAT mode: b 1
Used to perform statistical operations.
TABLE mode: b 2
Used to illustrate the changes in values of a function in table format.
DRILL mode: b 3
Used to practice math and multiplication table drills.
HOME Key
Press 7 to return to NORMAL mode from other modes.
Note: Equations and values currently being entered will disappear,
in the same way as when the mode is changed.
SET UP Menu
Press J to display the SET UP menu.
Press j to exit the SET UP menu.
Note: You can press N to return to the previously displayed
parent menu.
Determination of the angular unit (degrees, radians, and grades)
DEG (°): J 0 0 (default)
RAD (rad): J 0 1
GRAD (g): J 0 2
Statistical Calculations and Variables
The following statistics can be obtained for each statistical
calculation (refer to the table below):
Single-variable statistical calculation
Statistics of and .
1 3
Linear regression calculation
y x
Statistics of , and . In addition, the estimate of for a given
1 2 4
y x y x
(estimate ´) and the estimate of for a given (estimate ´).
Quadratic regression calculation
a b c
Statistics of , and . And coefficients , , in the quadratic
1 2 4
2
y a bx cx
regression formula ( = + + ). (For quadratic regression
r
calculations, no correlation coefficient ( ) can be obtained.)
x
When there are two ´ values, each value will be displayed with "1:"
or "2:", and stored separately in the X and Y memories.
x x
You can also specify the 1st value ( 1') and the 2nd value ( 2') separately.
Euler exponential regression, logarithmic regression,
power regression, inverse regression,
and general exponential regression calculations
y
Statistics of , and . In addition, the estimate of for a
1 2 4
x x y
given and the estimate of for a given . (Since the calculator
converts each formula into a linear regression formula before actual
a
calculation takes place, it obtains all statistics, except coefficients
b
and , from converted data rather than entered data.)
n
Number of samples
x –
x
Mean of samples ( data)
x
sx
Sample standard deviation ( data)
x
s x Sample variance ( data)
2
sx x
Population standard deviation ( data)
1 x
s
x Population variance ( data)
2
x
Σx
Sum of samples ( data)
x
Σx
Sum of squares of samples ( data)
2
x
xmin Minimum value of samples ( data)
x
xmax Maximum value of samples ( data)
– y
y
Mean of samples ( data)
y
sy
Sample standard deviation ( data)
s Sample variance ( y data)
2 y
sy y
Population standard deviation ( data)
s y
y Population variance ( data)
2
y
Σy
Sum of samples ( data)
y
Σy
Sum of squares of samples ( data)
2
2
,
Σxy x y
Sum of products of samples ( )
,
Σx x y
y Sum of products of samples ( 2 )
2
x
Σx
Sum of 3rd powers of samples ( data)
3
x
Σx
Sum of 4th powers of samples ( data)
4
y
ymin Minimum value of samples ( data)
y
ymax Maximum value of samples ( data)
Q x
First quartile of sample ( data)
1
Med x
Median of sample ( data)
3
Q x
Third quartile of sample ( data)
3
r Correlation coefficient (Except Quadratic regression)
a Coefficient of regression equation
b Coefficient of regression equation
4
c
Coefficient of quadratic regression equation
R
2
Coefficient of determination (Quadratic regression)
r
2
Coefficient of determination (Except Quadratic regression)
STAT Menu
After closing the input table, you can view statistical values, view
regression coefficient values, and specify statistical variables from
STAT menu (; 8).
; 8 0: Display statistical values
; 8 1: Display regression coefficient values
; 8 2: Specify statistical value variables
Σ
; 8 3: Specify statistical value ( related) variables
; 8 4: Specify max/min value variables
; 8 5: Specify regression coefficient variables
Notes:
• List display of regression coefficient values and specification of
regression coefficient variables do not appear in single-variable
statistical calculation.
x y
• Estimated values ' and ' are specified with the keys (@ V,
x x
@ U). If there are two ' values, you can specify 1' and
x
2' from the STAT menu ( 8 5) to obtain the values
;
separately.
• In the statistical value and regression coefficient value lists, you
cannot return to the menu by pressing N.
Statistical Calculation Formulas
22
An error will occur when:
• The absolute value of the intermediate result or calculation result
×
is equal to or greater than 1 10 100 .
• The denominator is zero.
• An attempt is made to take the square root of a negative number.
• No solution exists in the quadratic regression calculation.
Selecting the display notation and decimal places 1
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, the number of decimal places (TAB) can be set to any
value between 0 and 9.
• When J 1 1 (SCI) is pressed, the number of significant
digits can be set to any value between 0 and 9. Entering 0 will set
a 10-digit display.
Setting the floating point number system in scientific notation
NORM1 (the default) and NORM2. A number is automatically
displayed in scientific notation outside a preset range:
≤ ≤
NORM1 (J 1 3): 0.000000001 | x | 9,999,999,999
≤ ≤
NORM2 (J 1 4): 0.01 | x | 9,999,999,999
Selecting the editor and setting the answer display
2
This calculator has the following two editors in NORMAL mode:
WriteView and Line.
Set the display format for numerical calculation results in WriteView
editor.
The WriteView editor
p
EXACT(a/b,r, ) J 2 0 0 (default)
APPROX.
J 2 0 1
The Line editor
J 2 1
Notes:
p
• When "EXACT(a/b,r, )" is set, results will appear in fraction
p
format or irrational number format (including and r) when
display is possible.
• When "APPROX." is set, results will be decimal display or
fraction display, and will be not shown in irrational number format
p
(including and r).
• Press U to change the calculation results to another format
that can be displayed.
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.
Setting the recurring decimal
3
In NORMAL mode, calculation results can be shown in a recurring
decimal format.
Recurring decimal is OFF: J 5 0 (default)
Recurring decimal is ON:
J 5 1
−
• In the WriteView editor, the recurring part is indicated by " ". In
the Line editor, the recurring part is indicated in parentheses.
• If over 10 digits, including the recurring part, the result cannot be
displayed in recurring decimal format.
Setting of the decimal point
You can show the decimal point in the calculation result as either a
dot or a comma.
DOT: J 6 0 (default)
COMMA: J 6 1
• During entry, the decimal point is only shown as a dot.
ENTERING, DISPLAYING, AND EDITING THE EQUATION
4
The WriteView Editor
Entry and display
In the WriteView editor, you can enter and display fractions or
certain functions as you would write them.
• The WriteView editor can be used in NORMAL mode.
Displaying calculation results (when EXACT is selected)
When possible, calculation results will be displayed using fractions,
p
r, and . When you press U, the display will cycle through the
following display styles:
p
→
• Mixed fractions (with or without ) improper fractions (with or
p
→
without ) decimal numbers
p
→
• Proper fractions (with or without ) decimal numbers
• Irrational numbers (square roots, fractions made using square
→
roots) decimal numbers
Notes:
• In the following cases, calculation results may be displayed using r:
• Arithmetic operations and memory calculations
• Trigonometric calculations
• In trigonometric calculations, when Entry value
entering values such as those in
DEG multiples of 15
the table to the right, results may be
1
 p
RAD
shown using r. multiples of
12
• Improper/proper fractions will be
 50
GRAD multiples of
converted to and displayed as 3
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
p
that uses is greater than three, the result is converted to and
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.
• In the Line editor, calculation results are displayed in decimal form
or line fraction notation if possible.
• Use U to switch the display format to fractional form or
decimal form (if possible).
TABLE MODE
23
You can see the changes in values of one or two functions using
TABLE mode.
Setting a table
1. Press b 2 to enter TABLE mode.
2. Enter a function (Function1), and press e.
3. If needed, enter the 2nd function (Function2) and press e.
4. Enter a starting value (X_Start:), and press e.
The default starting value is 0.
5. Enter a step value (X_Step:). The default step value is 1.
• You can use u and d to move the cursor between the
starting value and step value.
6. Press e when you finish entering a step value. A table with a
variable X and the corresponding values (ANS column) appears,
displaying 3 lines below the starting value.
If you entered two functions, the ANS1 and ANS2 columns appear.
You can use u and d to change the X value and see its
corresponding values in table format.
• The table is for display only and you cannot edit the table.
• The values are displayed up to 7 digits, including signs and a
decimal point.
• Press l or r to move the cursor to ANS column (ANS1
and ANS2 columns if you entered two functions) or X column.
• Full digits of the value on the cursor are displayed on the bottom
right.
Notes:
• In a function, only "X" can be used as a variable, and other
variables are all regarded as numbers (stored into the variables).
p
• Irrational numbers such as and can also be entered into a
r
starting value or a step value. You cannot enter 0 or a negative
number as a step value.
• You can use WriteView editor when inputting a function.
• The following features are not used in TABLE mode: coordinate
conversions, conversion between decimal and sexagesimal
numbers, and angular unit conversions.
• It may take time to make a table, or "-------" may be displayed,
depending on the function entered or conditions specified for the
variable X.
• Please note that when making a table, the values for variable X
are rewritten.
• Press @ Z or mode selection to return to the initial screen
of the mode, and return to the default values for the starting value
and step value.
DRILL MODE
Math Drill: b 3 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 3 1
Questions from each row of the multiplication table (1 to 12) are
displayed serially or randomly.
To exit DRILL mode, press b and select another mode.
Using Math Drill and × Table
×
1. Press b 3 0 for Math Drill or b 3 1 for Table.
2. Math Drill: Use u and d to select the number of
questions (25, 50, or 100).
× Table: Use u and d to select a row in the multiplication
table (1 to 12).
3. Math Drill: Use l and r to select the operator type for
+ − × ÷ +−×÷
questions ( , , , , or ).
× Table: Use l and r to select the order type ("Serial" or
"Random").
4. Press e to start.
×
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.
• If the answer is correct, " " appears and the next question is displayed.
• 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.
Ranges of Math Drill Questions
The range of questions for each operator type is as follows.
+ +
+ Addition operator: "0 0" to "20 20"
− −
Subtraction operator: "0 0" to "20 20"; answers are
]
positive integers and 0.
× ×
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.
Mixed operators: Questions within all the above ranges
+]>)
are displayed.
Editing the Equation
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.
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 the
cursor is directly over by pressing @ y.
Note: In a multi-level menu, you can press N to back to the
previous menu level.
Multi-line Playback Function
5
This calculator is equipped with a function to recall previous
equations and answers in NORMAL mode. Pressing u will
display the previous equation. The number of characters that can be
saved is limited. When the memory is full, stored equations will be
deleted to make room, starting with the oldest.
• 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 0 ,J 2
0 1 or J 2 1), and memory clear (@ P
1 0).
Priority Levels in Calculation
This calculator performs operations according to the following priority:
Fractions (1m4, etc.) Functions preceded by their argument
1 2
x x y x , x r
−
( 1 , 2 , n!, etc.) Implied multiplication of a memory
3 4
value (2Y, etc.) Functions followed by their argument (sin, cos,
5
 1
etc.) Implied multiplication of a function (2sin 30 , A , etc.)
6
4
× ÷ ÷ + −
nCr, nPr, GCD, LCM , , int , AND OR, XOR,
7 8 9 10 11
r xy
= + −
M, ►DEG, ►RAD, ►GRAD, → q →
XNOR , M , M , , ,
12
and other calculation ending instructions
• If parentheses are used, parenthesized calculations have
precedence over any other calculations.
SCIENTIFIC CALCULATIONS
• Press b 0 to select NORMAL mode.
Arithmetic Operations
6
• The closing parenthesis ) just before = or m may be
omitted.
Constant Calculations
7
• 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.
Conversion to Engineering notation
8
You can use ; < or ; > to convert the calculation
result to engineering notation.
• Press ; < to decrease the exponent. Press ; > to
increase the exponent.
• The settings (FSE) in the SET UP menu do not change.
Functions
9
• 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)
• abs value
Random Function
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.
Random numbers
A pseudo-random number, with three significant 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 flip, 0 (heads) or 1 (tails) can be randomly
generated by pressing @ w 2 e.
Random integer
You can specify a range for the random integer with "R.Int(" only.
R.Int(minimum value, maximum value)
For example, if you enter @ w 3 1 H 99 ) e, a
random integer from 1 to 99 will be generated.
Angular Unit Conversions
10
Each time @ ] is pressed, the angular unit changes in sequence.
Memory Calculations
11
Memory calculations can be performed in NORMAL and STAT modes.
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 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).
ERRORS AND CALCULATION RANGES
Errors
An error will occur if an operation exceeds the calculation ranges,
or if a mathematically illegal operation is attempted. When an error
occurs, pressing 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.
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 final calculation result
equals or exceeds 10 100 .
• An attempt was made to divide by zero (or an intermediate
calculation resulted in zero).
• The calculation ranges were exceeded while performing calculations.
• 0 or a negative number was entered as a step value in TABLE
mode. The absolute value of a starting value or a step value
equals or exceeds 10 100 in TABLE mode.
• When the number to be factored into primes is greater than 2 and
other than a 10-digit positive integer, or when the result of prime
, π
factorization is a negative number, decimal, fraction, r or .
ERROR 03: Nesting error
• The available number of buffers was exceeded. (There are 10 buffers
for numeric values and 64 buffers for calculation instructions).
ERROR 04: Data over
• Data items exceeded 100 in STAT mode.
Alert Messages
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 D3)
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.
Calculation Ranges
24
±
• 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
y
x , x
x
each calculation error. (This is the same for r , n!, e , ln,
etc., where continuous calculations are performed internally.)
Additionally, a calculation error will accumulate and become larger
in the vicinity of inflection points and singular points of functions.
• Calculation ranges
± − ± ×
10 to 9.999999999 10 and 0.
99 99
If the absolute value of an entry or a final or intermediate result
−
of a calculation is less than 10 99 , the value is considered to be 0
in calculations and in the display.
Display of results using r (when EXACT is selected)
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:
a P b c P d
± ±
 
e
f
• 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
• When the number of terms in the intermediate and final
calculation results is one or two.
Note: The result of two fractional terms that include r will be
reduced to a common denominator.
BATTERY REPLACEMENT
Notes on Battery Replacement
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.
Notes on erasure of memory contents
When the battery is replaced, the memory contents are
erased. Erasure can also occur if the calculator is defective
or when it is repaired. Make a note of all important memory
contents in case accidental erasure occurs.
When to Replace the Battery
EL-W531TH: If the display has poor contrast even after adjusting
the display contrast, the battery requires replacement.
EL-W531TG/W535XG: 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.
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.
xy
r r x y
→ q → q
• , : X memory ( or ), Y memory ( or )
x
• Two ´ 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.
Definable memories (D1–D3)
You can store functions or operations in definable memories
(D1–D3).
• To store a function or operation, press x, followed by a definable
memory key (I, J, or K), 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 definable memory
will be replaced when you save a new one into that memory.
• You cannot store functions or operations in definable memories
when entering values or items in STAT mode.
Memory List
Press ; 9 to display a list of the values saved in memory.
The values are shown in a 9-character range.
Applicable memories: A, B, C, D, E, F, X, Y, M
Chain Calculations
12
The previous calculation result can be used in the subsequent
calculation. However, it cannot be recalled after entering multiple
instructions.
Fraction Calculations
13
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, first convert it by
pressing @ :.
Binary, Pental, Octal, Decimal, and Hexadecimal
Operations (N-base)
14
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.
Note: The hexadecimal numbers A–F are entered by pressing
A B C D E F
, * , A , l , i , and H .
m
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.
Time, Decimal, and Sexagesimal Calculations
15
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:
Degree Second
Minute
Coordinate Conversions
16
• Before performing a calculation, select the angular unit.
• The results of coordinate conversions will be displayed as
decimal numbers even in the WriteView editor.
Rectangular coord. Polar coord.
Modify Function
17
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.
• 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.
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.
• 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.
• Do not throw batteries into a fire as they may explode.
Replacement Procedure
1. Turn the power off by pressing @ o.
2. Remove two screws. (Fig. 1)
3. Lift the battery cover to remove.
4. EL-W531TG/W535XG: Remove the used battery by prying it
out with a ball-point pen or other similar pointed device. (Fig. 2)
EL-W531TH: Remove the used battery.
5. EL-W531TG/W535XG: Install one new battery. Make sure the
+
" " side is facing up.
−
EL-W531TH: Install one new battery. First insert the " " 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". And then press j.
• 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 Fig. 2 Fig. 3
Automatic Power Off Function
This calculator will turn itself off to save battery power if no key is
pressed for approximately 10 minutes.
SPECIFICATIONS
Display: 96 × 32 dot matrix liquid crystal display
Display of calculation results:
Mantissa: 10 digits
Exponent: 2 digits
Internal calculations: Mantissas of up to 14 digits
Pending operations: 64 calculations 10 numeric values
EL-W531TG/W535XG
Power source:
Built-in solar cells
1.5 V ... — (DC): Backup battery
×
(Alkaline battery (LR44 or equivalent) 1)
EL-W531TH
1.5 V ... — (DC): Heavy duty manganese
×
battery (size AAA or R03) 1
Operating time: EL-W531TG/W535XG
(varies according to Approx. 3,000 hours when continuously
use and other factors) displaying 55555 at 25°C (77°F), using
the alkaline battery only
EL-W531TH
Approx. 17,000 hours when continuously
displaying 55555 at 25°C (77°F)
Operating temperature: 0°C–40°C (32°F–104°F)
External dimensions: × ×
80 mm (W) 166 mm (D) 15 mm (H)
× ×
3-5/32" (W) 6-17/32" (D) 19/32" (H)
Weight: EL-W531TG/W535XG
Approx. 108 g (0.24 lb) (including battery)
EL-W531TH
Approx. 113 g (0.25 lb) (including battery)
Accessories: ×
Battery 1 (installed), operation manual,
and hard case
FOR MORE INFORMATION
ABOUT SCIENTIFIC CALCULATORS
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