SHARP EL-W531X Scientific Calculator User Manual

: June 6, 2024
: Sharp

SCIENTIFIC CALCULATOR
WriteView
EL-W531 X EL-W531 XG EL-W531 XH MODEL EL-W535X

OPERATION MANUAL

PRINTED IN CHINA/ IMPRIME EN CHINE / IMPRESO EN CHINA 16BSC(TINSEA101EHM2)

INTRODUCTION

Thank you for purchasing the SHARP Scientific Calculator Model EL- W531X/W531XG/W531X11/W535X. About the calculation examples (Including some formulas and tables), refer to the reverse side of this English manual. Refer to the number on the right of each title in the manual for use. After reading this manual, store it in a convenient location for future reference. Notes:

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
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, use only a SHARP servicing dealer, SHARP approved service facility, or SHARP repair service where available.

Hard Case

DISPLAY

During actual use, not all symbols are displayed at the same time.
Only the symbols required for the usage under instruction are shown in the display and calculation examples of this manual.

: Indicates that some contents are hidden in the fie directions shown.
2ndF : Appears when (2ncF) is pressed, indicating that the functions shown in orange are enabled.
**HYP**: Indicates that ( hyp ) has been pressed and the hyperbolic functions are enabled. If (2ndF) (arc hyv) is pressed, the symbols “2ndF HYP” appear, indicating that inverse hyperbolic functions are enabled.
**ALPHA**: Indicates that (ouswk), ( STO), or ( RcL) has been pressed, and entry (recall) of memory contents and recall of statistics can be performed.
**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).
**ENG/SCl/FIX/N2/N1**: Indicates the notation used to display a value and changes by SET UP menu. N1 is displayed on-screen as “NORM?, and N2 as “NORM2”.

BEFORE USING THE CALCULATOR

When using for the first time, press the RESET switch (on the back), with the tip of a ball-point pen or similar object.
Adjusting the Display Contrast
Press **(SET UP**‘) ( 3 ) then ( + ) or ( —) to adjust the contrast. Press **ON/C**to exit.
Power On and Off
Press ( one ) to turn the calculator on. The data that was on-screen when the power was turned off will appear on the display. Press (**2ndF)** ( OFF ) to turn it off.
Key Notations Used In this Manual
In this manual, key operations are described as follows:

Functions that are printed in orange above the key requirement to be pressed first before the key. When you specify the memory, press ‘ALPHA) first. Numbers for input values are not shown as keys but as ordinary numbers.
Functions that are printed in gray adjacent to the keys are effective in specific modes.

The WriteView and Line Editors

This calculator has the following two editors in NORMAL mode: WriteView and Line. You can select between them in the SETUP menu.

Note : In certain calculation examples, where you see the 1E3 symbol, the key operations and calculation results are shown as they would appear in the Line editor.

Clearing the Entry and Memories

Press (ON/C) STO ) and then choose a memory to clear one variable memory.
Definable memory. See “Memory Calculations”.
Statistical data (entered data)
See “Memory clear key”.
Cleared when changing between sub-modes in STAT mode.

Memory clear key
Press (**2ndF**) (**m-ci_R**)to display the menu.

To initialize the display settings, press ( o ). The parameters set as follows:
Angular unit: DEG
Display notation: NORM1
N-base: DEC
To clear all variables and memories (A—F, M, X, Y, D1—D4, ANS, and STAT) at once, press ( .1 )( o ).
To RESET the calculator, press ( 2 ) ( o J. The RESET operation will erase all data stored in memory and restore the calculator’s default settings.

ENTERING, DISPLAYING, AND EDITING THE EQUATION
The WriteView Editor Entry and display In the WriteView editor, you can enter and display fractions or certain functions as you would write them.

Notes:

The WriteView editor can only be used in NORMAL mode.
If the equation grows too large, it may extend off the edge of the display after you obtain the result. If you want to see the entire equation, press ( 1) or ( ) to return to the editing screen.

Displaying calculation results
When possible, calculation results will be displayed using fractions, I, and TC. When you press (cHAGE), the display will cycle through the following display styles:

Mixed fractions (with or without TC)
improper fractions (with or without 7L)
decimal numbers
Proper fractions (with or without TO —’ decimal numbers
Irrational numbers (square roots, fractions made using square roots) —’ decimal numbers Notes:
In the following cases, calculation results may be displayed using I:
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
Calculation results may extend off the edges of the screen. You can see those parts by pressing or (►) (depending on whether the left or right portion is hidden).
Improper/proper fractions will be converted to and displayed as decimal numbers if the number of digits used in their expression is greater than nine. In the case of mixed fractions, the maximum number of displayable digits (including integers) is eight.
If the number of digits in the denominator of a fractional result that uses It 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.
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 ( 4 ) or ( ► ) 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, press the end of the equation and press beginning. Press cursor. Press (2ndF)( ) or the beginning or the end of the equation. ( 4 ( ► A 2ndF) ( . ( Or brings you to the to move the to jump the cursor to the ( In the WriteView editor, you can use A and ( ) to move the cursor up and down—between the numerator and denominator, for example.
Backspace and delete key
To delete a number or function, move the cursor to the right of it, then press ( BS ). You can also delete a number or function that the cursor is directly over by pressing (2ndF) DEL.

Multi-line Playback Function

This calculator is equipped with a function to recall previous equations and answers in NORMAL mode. A maximum of 340 characters can be stored in memory. When the memory is full, stored equations will be deleted to make room, starting with the oldest.
Pressing ( ) will display the previous equation. Further
pressing ( ) will display preceding equations (after returning to the previous equation, press ( ) to view equations in order). In addition, (2ndF) ( ) can be used to jump to the oldest equation, and (2ndF) ( ) to jump to the newest one.

To edit an equation after recalling it, press ( ) or
The multi-line memory will be cleared by the following operations: ), mode change, RESET, N-base conversion, angular unit conversion, editor change ( ( 1 )), and memory clear (**(2ndF M-CLR 1 0)**
``Equations that have one result require an additional eleven characters’ worth of memory to store in order to hold the result. • In addition to the amount of memory needed to store an equation, the WriteView editor will require a certain amount for the sake of display. • Equations also include calculation ending instructions, such as

Priority Levels in Calculation

This calculator performs operations according to the following priority: ® Fractions (1 r4, etc.) 0 Functions preceded by their argument (r1, x2, n!, etc.) ® yX, ® Implied multiplication of a memory value (2Y, etc.) ® Functions followed by their argument (sin, cos, etc.) © Implied multiplication of a function (2sin 30, A+, etc.) ® nCr, nPr 0 x, 0 +, — io AND OR, XOR, XNOR =, M+, M—, DEG, RAD, ►GRAD, DATA, CD, —.TO, -•..xy, and other calculation ending instructions • If parentheses are used, parenthesized calculations have precedence over any other calculations.

INITIAL SET UP

Mode Selection
NORMAL mode: (MODE) ( 0) (default)
Used to perform arithmetic operations and function calculations.

STAT mode:
Erv’focg 1 )
Used to perform statistical operations.
DRILL mode: (MODE ( 2 )
Used to practice math and multiplication table drills.
SET UP Menu
Press (SETUP) to display the SETUP menu. Press (orwc) to exit the SETUP menu.
Determination of the angular unit The following three angular units (degrees, radians, and grads) can be specified.
DEG (°): (SETUP) ( 0 0 (default)
RAD (rad): (SETUP) ( o ) ( o )
GRAD (g): SET UP) ( 1 ( ) 2 )
Selecting the display notation and decimal places
Five display notation systems are used to display calculation results: Two settings of Floating-point (NORM1 and NORM2), a Fixed decimal point (FIX), Scientific notation (SCI), and Engineering notation (ENG).

When (SETUP) ( 1 ) ( o ) (FIX) or (sErup)( 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 (SET UP) ( 1 ) ( 1 ) (SCI) is pressed, “SIG(0-9)?” will be displayed and the number of significant digits can be set to any value between 0 and 9. Entering 0 will set a 10-digit display.

Setting the floating-point number system in scientific notation
Two settings are used to display a floating-point number: NORM1 (the default) and NORM2. A number is automatically displayed in scientific notation outside a preset range:
NORM1 ((sErup) 1 )( 3 )): 0.000000001 5 I x I 5 9,999,999,999 • NORM2 ((SETUP)( 1 )( 4 )): 0.01 5 I x I 5. 9,999,999,999
Selecting the editor
Two editors are available in NORMAL mode: • The WriteView editor (W-VIEW): • The Line editor (LINE): (SETUP) ( 2 SET UP) ( 2 ) 1 ) I 0 (default)
Adjusting the display contrast
Press (SETUP) 3 ), then + or – ) to adjust the contrast. Press orwc) 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 ), 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 (mom) ( o ) to select NORMAL mode.
In each example, press (ow) to clear the display first. Unless otherwise specified, calculation examples are performed in the WriteView editor with the default display settings ((2ndF 0 ))•

Arithmetic Operations
• 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.

Functions

Refer to the calculation examples for each function.
In the Line editor, the following symbols are used:
0•.: to indicate an expression’s power. (“, vr 2ndF (2ndr„ 10-k,)
: to separate integers, numerators, and denominators. (1/4 a/b :2ndF: abic
When using 1/42ndF, 1/4IogaX, or ‘2ndF: 1/4 abs, in the Line editor, values are entered in the following way:
login (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 (ENTER). Press to exit.
Random numbers
A pseudo-random number, with three significant digits from 0 up to 0.999, can be generated by pressing ENTER) • 2ndF) RANDOM) ( o
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
Random coin
To simulate a coin flip, 0 (heads) or 1 (tails) can be randomly generated by pressing (2ndF) RANDoni) ( 2 ) (ENTER), (2ndF (RAnoom ( 1 ) ENTER)
Random integer
An integer between 0 and 99 can be generated randomly by pressing 2ndF (mow ( 3 ) ENTER)
Memory Calculation s
0 Memory calculations can be performed in NORMAL and STAT modes.
Temporary memories (A—F, X and Y)
Press ( sro) and a variable key to store a value in memory. Press ( Rci_ ) and a variable key to recall the value from that memory. To place a variable in an equation, press ALPHA, 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 (orwc)( sTo ) ( 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.
—•/^0, —•xy: X memory (r or x), Y memory (8 or y)
Two x” values from a quadratic regression calculation in STAT mode: X memory (1:), Y memory (2:)
Use of ( Rai or Al-PHA will recall the value stored in memory using up to 14 digits.

Definable memories (D1—D4)
You can store functions or operations in definable memories (D1—D4).

To store a function or operation, press ( sTo), followed by a definable memory key (( D1 ), D2 ), ( D3 ), or ( D4 )), followed by the operation you want to store. Menu-related operations, such as (SETUP), cannot be stored. Press (owc) 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.
When displaying and correcting a data set in STAT mode, you cannot store functions or operations in definable memories.

Chain Calculations
0 The previous calculation result can be used in the subsequent calculation. However, it cannot be recalled after entering multiple instructions.

Fraction Calculations

0 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 (ci@GE). 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 2ndF) (–e€G)

Binary, Pental, Octal, Decimal, and Hexadecimal
Operations (N-base)
Conversions can be performed between N-base numbers in NORMAL mode. The four basic arithmetic operations, calculations with parentheses, and memory calculations can also be performed, along with the logical operations AND, OR, NOT, NEG, XOR, and XNOR on binary, pental, octal, and hexadecimal numbers. Conversion to each system is performed with the following keys: (“BIN” appears), (2ndF) (+pEN) (“PEN” appears), (“OCT’ appears), (2ndF) (e-FiEx) (“HEX” appears), (“BIN”, “PEN”, “OCT’, and “HEX” disappear)
Note : The hexadecimal numbers A—F are entered by pressing

(2ndF) 2ndF (2ndF ( +BIN gi•OCT) (*DEC
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
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:

Coordinate Conversions

Before performing a calculation, select the angular unit.
The calculation result is automatically stored in the X and Y memories (r or x in X memory, and 0 or y in Y memory).
The results of coordinate conversions will be displayed as decimal numbers even in the WriteView editor.’

Modify Function

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 if ‘,2ndF)(MDF)), 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 to convert it to decimal form first.
foreign

STATISTICAL CALCULATIONS

Statistical calculations can be performed in STAT mode. There are eight sub- modes within STAT mode. Press ( ), then press the number key that corresponds to your choice:

Statistical Calculations and Variables 0 The following statistics can be obtained for each statistical calculation (refer to the table below): Single- variable statistical calculation Statistics of O. Linear regression calculation Statistics of (I) and O. In addition, the estimate of y for a given x (estimate y”) and the estimate of x for a given y (estimate xl Quadratic regression calculation Statistics of 0 and C), and coefficients a, b, c in the quadratic regression formula (y = a + bx + cx2). (For quadratic regression calculations, no correlation coefficient (r) can be obtained.) When there are two x’ values, each value will be displayed with “1:” or ‘2:”, and stored separately in the X and Y memories. Euler exponential regression, logarithmic regression, power regression, inverse regression, and general exponential regression calculations Statistics of 0 and O. In addition, the estimate of y for a given x and the estimate of x for a given y. (Since the calculator converts each formula into a linear regression formula before actual calculation takes place, it obtains all statistics, except coefficients a and b, from converted data rather than entered data.)

®	7	Mean of samples (x data)
sx	Sample standard deviation (x data)
ax	Population standard deviation (x data)
n	Number of samples
Ex	Sum of samples (x data)
Ex2	Sum of squares of samples (x data)
®	Yr ‘	Mean of samples (y data)
sy	Sample standard deviation (y data)
ay	Population standard deviation (y data)
Ey	Sum of samples (y data)
Eye	Sum of squares of samples (y data)
Exy	Sum of products of samples (x, y)
r	Correlation coefficient
a	Coefficient of the regression equation
b	Coefficient of the regression equation
c	Coefficient of the quadratic regression equation

Use (ALFRA) and ( RCL J to perform a variable calculation in STAT mode.
(CHtkE) does not function in STAT mode.

Data Entry and Correction
Before entering new data, clear the memory contents. Data entry Single- variable data Data Data ( (A) ) frequency DATA (To enter multiples of the same data) Two-variable data Data x ( (.%) ) data y Data x ( ) data y( (+!») frequency DATA (To enter multiples of the same data x and y)

Note : Up to 100 data items can be entered. With the single-variable data, a data item without frequency assignment is counted as one data item, while an item assigned with frequency is stored as a set of two data items. With the two-variable data, a set of data items without frequency assignment is counted as two data items, while a set of items assigned with frequency is stored as a set of three data items.

Data correction
Correction before pressing DATA immediately after a data entry: Delete incorrect data with (owe), then enter the correct data. Correction after pressing (DATA): Use • ) and v ) to display the previously entered data set. Press 0 to display the data set in ascending (oldest first) order. To reverse the display order to descending (latest first), press the 0 key. Press 2ndF En. or 2ndF 0 to jump the cursor to the beginning or end of the data set. Each data set is displayed with “X:”, “Y:”, or “F:”.

Display and move the cursor to the data item to be modified by using ) and ( ‘ ), input the correct value, then press (DATA] or
(ENTER
• To delete a data set, display and move the cursor to an item of the data set to delete by using ( ) and ( ), then press ( co J. The data set will be deleted. • To add a new data set, press (owc) to exit the display of previously entered data and input the values, then press (2ndF) DATA)

Statistical Calculation Formulas

Type	Regression formula
Linear	y=a+bx
Quadratic	y = a + bx + cx 2
Euler exponential	y = a • ebx
Logarithmic	y=a+b•Inx
Power	y=a•xb
Inverse	1

y=a+b x
General exponential| y = a•bx

An error will occur when:

The absolute value of the intermediate result or calculation result is equal to or greater than 1 x 10100.
The denominator is zero.
An attempt is made to take the square root of a negative

No solution exists in the quadratic regression calculation

DRILL MODE

Math Drill:( MODE) 2 ( 0
Math operation questions with positive integers and 0 are displayed randomly. It is possible to select the number of questions and operator type.
Multiplication Table (X Table): Questions from each row of the multiplication table (1 to 12) are displayed serially or randomly.
To exit DRILL mode, press woe) and select another model.
Using Math Drill and X Table

Press (MODE) ( 2 ) ( ) for Math Drill or (before)( ) 1 ) for X Table.
Math Drill: Use ( ) and questions (25, 50, or 100). X Table: Use ( ) and v ) to select a row in the multiplication table (1 to 12).
Math Drill: Use ( ) and ( ►) to select the operator type for questions (+, x, +, or +—x+). X Table: Use ( and (►) to select the order type (“Serial” or “Random”).
Press (ENTER) to start. When using Math Drill or X Table (random order only), questions are randomly selected and will not repeat except by chance.
Enter your answer. Press (orwc) or ( BS ) to clear the entered number and then enter the correct answer. to select the number of
Press (ENTER). • If the answer is correct, “V” appears and the next question is displayed. • If the answer is wrong, “X”appears and the same question is displayed. This will be regarded as an incorrect answer. • If you press (ENTER) without entering an answer, the correct answer is displayed and then the next question is displayed. This will be regarded as an incorrect answer.
Continue answering the series of questions by entering the answer and pressing (ENTER).
After you finish, press (ENTER) and the number and percentage of correct answers are displayed.
Press (ENTER) to return to the initial screen for your current drill.

Math Drill sample

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 10100.
An attempt was made to divide by zero (or an intermediate calculation resulted in zero).
The calculation ranges were exceeded while performing calculations.
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 0
Cannot delete!
The selected item cannot be deleted by pressing ( as ) or in the WriteView editor. 2ndF ( Oa)
Ex.(.r)5 bsIn this example, delete the exponent before attempting to delete the parentheses.
Cannot call!
The function or operation stored in definable memory (D1 to D4) cannot be called. Ex. An attempt was made to recall a statistical variable from within NORMAL mode.
Buffer full!
The equation (including any calculation ending instructions) exceeded its maximum input buffer (159 characters in the WriteView editor or 161 characters in the Line editor). An eauation may not exceed its maximum Mout buffer.

Calculation Ranges

Within the ranges specified, this calculator is accurate to ±1 of the 10th digit of the mantissa. However, a calculation error increases in continuous calculations due to the accumulation of each calculation error. (This is the same for yx, AV, n!, ex, In, 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 ±10-99 to ±9.999999999 x 1099 and 0. If the absolute value of an entry or a final or intermediate result of a calculation is less than 10-99, the value is considered to be 0 in calculations and in the display.
Display of results using.√
Calculation results may be displayed using√ when all of the following conditions are met:
When intermediate and final calculation results are displayed in the following form:
When each coefficient falls into the following ranges: 1 5 a < 100; 1 < b < 1,000; 0 c < 100; 1 d < 1,000; 1 e < 100; 1 5. 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 √ 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 the 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-W531X/W531XH/W535X: If the display has poor contrast even after adjusting the display contrast, the battery requires replacement. EL-W531XG: If the display has poor contrast or nothing appears on the display when (oil) 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 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

Turn the power off by pressing
Remove one screw or two screws. (Fig. 1)
Lift the battery cover to remove.
EL-W531X/W531XWW535X: Remove the used battery by prying it out with a ball-point pen or another similar pointed device. (Fig. 2) EL-W531XH: Remove the used battery.
EL-W531X/W531XG/W535X: Install one new battery. Make sure the “+” side is facing up. EL-W531XH: Install one new battery. First, insert the “—” side toward the spring. (Fig. 3)
Replace the cover and screws.
Press the RESET switch (on the back) with the tip of a ball-point pen or similar object.
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.

Automatic Power Off Function
This calculator will turn itself off to save battery power if no key is pressed for approximately 10 minutes.

SPECIFICATIONS

Calculation features:	Scientific calculations, statistical calculations, etc.
Drill features	Math Drill and Multiplication Table
Display:	96 x 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
Power source:	EL-W531X/W535X 1.5 V (DC): Alkaline battery (LR44 or

equivalent) x 1 EL-W531XG Built-in solar cells 1.5 V (DC): Backup battery (Alkaline battery (LR44 or equivalent) x 1) EL-W531 XH 1.5 V (DC): Heavy-duty manganese battery (size AAA or R03) x 1
Operating time:| EL-W531XPN535X
(varies according to| Approx. 3,000 hours when continuously
use and other factors)| displaying 55555. at 25°C (77°F)
External dimensions:| 80 mm (W) x 168 mm (D) x 14 mm (H) 3-5/32″ (W) x 6-5/8″ (D) x 9/16″ (H
Weight:| EL-W531X/W535X Approx. 99 g (0.221b) (including battery) EL-W531XG Approx.100 g (0.23 lb) (including battery) EL-W531 XH Approx.106 g (0.24 lb) (including battery)
Accessories:| Battery x 1 (installed), operation manual, and hard case

FOR MORE INFORMATION ABOUT SCIENTIFIC CALCULATORS
Visit our Web site. http://sharp-world.com/calculator/
SHARP
SHARP CORPORATION

Write View
EL-W531 X EL-W531 XG EL-W531 XH EL-W535X
CALCULATION EXAMPLES

• The range of the results of inverse trigonometric functions

The amount of memory used for the sake of display in the WriteView editor, measured in characters (excluding entered values. denoted in the chart by “0”).

interger

For Australia/New Zealand only: For warranty information please see www.sharp.net.au.
Information on the Disposal of this Equipment and its Batteries

IF YOU WISH TO DISPOSE OF THIS EQUIPMENT OR ITS BATTERIES, DO NOT USE THE ORDINARY WASTE BIN! DO NOT PUT THEM INTO A FIREPLACE!
1. In the European Union Used electrical and electronic equipment and batteries must be collected and treated SEPARATELY in accordance with law. This ensures an environment-friendly treatment, promotes recycling of materials, and minimizes final disposal of waste. Each household should participate! ILLEGAL DISPOSAL can be harmful to human health and the environment due to contained hazardous substances! THIS SYMBOL appears on electrical and electronic equipment and batteries (or the packaging) to remind you of that ! If ‘Hg’ or ‘Pb’ appears below it, this means that the battery contains traces of mercury (Hg) or lead (Pb), respectively. Take USED EQUIPMENT to a local, usually municipal, collection facility, where available. Before that, remove batteries. Take USED BATTERIES to a battery collection facility; usually a place where new batteries are sold. Ask there for a collection box for used batteries. If in doubt, contact your dealer or local authorities and ask for the correct method of disposal.
2. In other Countries outside the EU
If you wish to di scard this product, please contact your local authorities and ask for the correct method of disposal.

For Canada only : For warranty information, please seehttp:/hvww.share .can-CA/ForHome/HomeOffice/Calculator.asox, Pour le Canada seulement : Pour en lire plus sur la garantie, visitez le
http://www.sharp.ca/fr-CNForHome/HomeOffice/Calculatoraspi
For EU only:
Manufactured by SHARP CORPORATION 22-22 Nagaike-cho, Abeno-Miku, Osaka 545-8522, Japan In Europe represented by Sharp Electronics Europe Ltd. 4 Furzeground Way, Stockley Park, Uxbridge, Middlesex, UB11 1EZ, U.K.http://www.sharp.eu/
Imported into Europe by MORAVIA Consulting, spol. s r.o.,
Olomoucka 83, 627 00 Brno, Czech Republic Visit our Web site
http://www.moravia-consulting.com