Casio fx-991W, fx-570W, fx-115W, fx-100W User Manual

fx-100W fx-115W fx-570W fx-991W

User’s Guide Guía del usuario Mode d’emploi Bedienungsanleitung Guida dell’utilizzatore

E S F G I

ENGLISH

Removing and Replacing the Calculator’s Cover

• To Remove the cover

Grasp the top of the cover, and slide the unit out from the bottom.

• To Replace the cover

Grasp the top of the cover, and slide the unit in from the bottom.

Always slide the unit into the cover with the unit’s display end first. Never slide the keyboard end of the unit into the cover.

Safety Precautions

Be sure to read the following safety precautions before using this calculator. Keep this manual handy for later reference.

Caution

This symbol is used to indicate information that can result in personal injury or material damage if ignored.

Batteries

• After removing the batteries from the calculator, put

them in a safe place where there is no danger of them getting into the hands of small children and accidently swallowed.

• Keep batteries out of the reach of small children. If

accidently swallowed, consult with a physician immediately.

• Never charge batteries, try to take batteries apart, or

allow batteries to become shorted. Never expose batteries to direct heat or dispose of them by incineration.

• Misuse of batteries can cause them to leak acid that

can cause damage to nearby items and creates the possibility of fire and personal injury.

•Always make sure that a battery’s positive

•Remove the batteries if you do not plan to use the

•Use only the type of batteries specified for this cal-

l sides are facing correctly when you

negative load it into the calculator.

calculator for a long time.

culator in this manual.

Disposing of the Calculator

• Never dispose of the calculator by burning it. Doing

so can cause certain components to suddenly burst, creating the danger of fire and personal injury.

k and

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• The displays and illustrations (such as key markings)

shown in this User’s Guide are for illustrative purposes only, and may differ somewhat from the actual items they represent.

• The contents of this manual are subject to change

without notice.

• In no event shall CASIO Computer Co., Ltd. be li-

able to anyone for special, collateral, incidental, or consequential damages in connection with or arising out of the purchase or use of these materials. Moreover, CASIO Computer Co., Ltd. shall not be liable for any claim of any kind whatsoever against the use of these materials by any other party.

Handling Precautions

• Be sure to press the P button on the back of the cal-

culator (step 6 on page 35 or 36) before using it for the first time ( fx-570W/ fx-100W ).

• Be sure to press the 5 key before using the calcula-

tor for the first time (

• Even if the calculator is operating normally, replace

the battery at least once every three years for the fx-570W/ two years for the fx-100W.

Dead battery can leak, causing damage to and malfunction of the calculator. Never leave the dead batter y in the calculator.

fx-991W/ fx-115W, or at least once every

• The battery that comes with the calculator when you

purchase it is for testing only. It may not provide full service life.

• Low battery power can cause memory contents to

become corrupted or lost completely. Always keep written records of all important data.

fx-991W/ fx-115W ).

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• Avoid use and storage in areas subjected to tempera-

ture extremes.

Very low temperatures can cause slow display response, total failure of the display, and shortening of battery life. Also avoid leaving the calculator in direct sunlight, near a window, near a heater or anywhere else it might become exposed to very high temperatures. Heat can cause discoloration or deformation of the calculator’s case, and damage to internal circuitry.

• Avoid use and storage in areas subjected to large

amounts of humidity and dust.

Ta ke care never to leave the calculator where it might be splashed by water or exposed to large amounts of humidity or dust. Such elements can damage internal circuitry.

• Never drop the calculator or otherwise subject it to

strong impact.

• Never twist or bend the calculator.

Avoid carrying the calculator in the pocket of your trousers or other tight-fitting clothing where it might be subjected to twisting or bending.

• Never try to take the calculator apar t.

• Never press the keys of the calculator with a ball-point

pen or other pointed object.

• Use a soft, dry cloth to clean the exterior of the unit.

If the calculator becomes very dirty, wipe it off with a cloth moistened in a weak solution of water and a mild neutral household detergent. Wring out all excess moisture before wiping the calculator. Never use thinner, benzine or other volatile agents to clean the calculator. Doing so can remove printed markings and damage the case.

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Contents

Safety Precautions .......................................... 1

Handling Precautions ....................................... 2

Two-line Display ............................................... 5

Key Layout ........................................................ 6

Before Starting Calculations... ....................... 8

kModes .................................................................... 8

kInput Capacity ........................................................ 9

kMaking Corrections Dur ing Input ........................... 9

kReplay Function ..................................................... 9

kError Locator ........................................................ 10

kExponential Display Formats ............................... 10

kAnswer Memory ................................................... 10

Basic Calculations ......................................... 11

Memory Calculations ..................................... 11

kIndependent Memory ........................................... 11

kVari ables .............................................................. 11

Fraction Calculations ..................................... 12

kFr action Calculations ........................................... 12

kDecimal-to-Fraction Conversion ........................... 12

kFraction-to-Decimal Conversion .......................... 12

Percentage Calculations ................................ 13

Scientific Function Calculations ................... 14

kTr igonometric/Inverse Trigonometric Functions .... 14

kHyperbolic/Inverse Hyperbolic Functions ............ 14

kAngle Unit Conversion ......................................... 15

kCommon and Natural Logarithms/

Antilogarithms ...................................................... 15

kSquare Roots, Cube Roots, Roots, Squares,

Cubes, Reciprocals, Factorials,

Random Numbers and π .......................................... 15

kFIX, SCI, RND ..................................................... 16

kENG Calculations ................................................ 17

kInputting ENG Calculation Symbols ..................... 17

kCoordinate Conversion

kPermutation .......................................................... 19

kCombination ......................................................... 19

(Pol(x, y), Rec (r, θ)) ............

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Statistical Calculations ..................................19

kStandard Deviation (SD Mode) ............................ 19

kProbability Distribution Calculations ................... 20

kRegression Calculations (REG Mode) ................. 21

Complex Number Calculations

(CMPLX Mode) ............................................... 23

kAbsolute Value/Argument Calculation .................. 24

Formula Memory ............................................ 24

Metric Conversions (fx-570W/ fx-991W ) ....... 25

Scientific Constants (fx-570W/ fx-991W ) ...... 26

Base-n Calculations ...................................... 28

Integration Calculations ................................. 30

Degrees, Minutes, Seconds Calculations .... 30

Technical Information..................................... 31

kWhen you have a problem...... ............................. 31

kError Messages ................................................... 31

kOrder of Operations ............................................. 32

kStacks .................................................................. 33

kPower Supply ....................................................... 34

kInput Ranges ....................................................... 37

Specifications ................................................ 39

Two-line Display

You can simultaneously check the calculation formula and its answer.

The first line displays the calculation formula. The second line displays the answer.

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Key Layout

fx-570W

16 29

LOGIC

DEC OCTHEX

REPLAY

CONV

29 15 29 15 29

-1

sin

Page

Page Page

18 24

SHIFT

ALPHA

25 25 15 16

25 30 2716 16 15

17 12 1615 15 15

11 30 11 1111 14 11 14 11

11 30 1414 14 20 24 24 1121 24 20 11 11 11

DISTR Re

<->

lm argr Abs

11 11 1111 11

21 17 21 1721 17 9 11 19

BINS

MODE

BIN

-1

cos

McI

tan

M-

DT CL

OFF

-1

2020

ScI

Page Page

21 17 21 1721 17 19 19

Page

19 17 19 1719 17 21 18 21 18

Page

16 1616 15 13

Rnd Ran#

Page

11 10

CONV

fx-100W:

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nPr nCr

Pol(

DRG

Rec(

Key Layout

fx-991W

16 29

LOGIC

DEC OCTHEX

REPLAY

CONV

29 15 29 15 29

-1

sin

Page

Page Page

18 24

SHIFT

ALPHA

25 25 15 16

25 30 2716 16 15

17 12 1615 15 15

11 30 11 1111 14 11 14 11

11 30 1414 14 20 24 24 1121 24 20 11 11 11

DISTR Re

<->

lm argr Abs

11 11 1111 11

21 17 21 1721 17 9 11 19

BINS

MODE

BIN

-1

cos

McI

tan

M-

DT CL

-1

2020

ScI

Page Page

21 17 21 1721 17 19 19

Page

19 17 19 1719 17 21 18 21 18

Page

16 1616 15 13

Rnd Ran#

Page

CONV

fx-115W:

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nPr nCr

Pol(

DRG

Rec(

Before Starting Calculations...

k Modes

Application

Calculation Modes

Normal calculations COMP –

Complex number calculations

Standard deviation calculations

Regression calculations REG REG Base-n calculations BASE-N b (binary)

Angle Unit Modes

Degrees DEG R Radians RAD T Grads GRA B

Display Modes

Exponential notation (Canceling FIX and SCI specification)

Number of decimal place specification

Number of significant digit specification

Exponential display range specifications

Note!

•Mode indicators appear in the lower part of the display, except for the Baseponent part of the display.

• The ENG mode cannot be selected while the calculator is in the CMPLX or BASE-N mode.

n indicators which appear in the ex-

Mode Mode Name Indicator

CMPLX CMPLX

SD SD

NORM1 – NORM2 –

FIX Fix

SCI Sci

ENG ENG

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o (octal) d (decimal) H (hexadecimal)

•You cannot set the angle unit or the display mode while the calculator is in the BASE-N mode.

• The COMP, CMPLX, SD, and REG modes can be used in combination with the angle unit modes.

•Be sure to check the current calculation mode (SD, REG, COMP, CMPLX) and angle unit mode (DEG, RAD, GRA) before beginning a calculation.

k Input Capacity

• The memory area used for calculation input can hold 79 “steps.” Whenever you input the 73rd step of any calculation, the cursor changes from “_” to “k” to let you know memory is running low. If you still need to input more, you should divide your calculation into two or more parts.

k Making Corrections During Input

•Use e and r to move the cursor to the location you want.

[ to delete the number or function at the current

•Press cursor position.

A K to change to an insert cursor t. Inputting

•Press something while the insert cursor is on the display inserts the input at the insert cursor position.

e, r, A K, or = returns to the normal cur-

•Press sor from the insert cursor.

k Replay Function

•Pressing r or e recalls the last calculation you performed. You can then make any changes you want in the calculation and re-execute it.

•Pressing

•Replay memory is cleared whenever you start a new

t does not clear Replay memory, so you can

recall the last calculation even after you press

calculation, change to another mode, or turn off power.

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k Error Locator

•Pressing r or e after an error occurs displays the calculation with the cursor positioned at the location where the error occurred.

k Exponential Display Formats

This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used. Press NORM 1 or NORM 2.

F F F F 3 1

(

)

to select

• NORM 1

With NORM 1, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than two decimal places.

• NORM 2

With NORM 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places.

•All of the examples in this manual show calculation results using the NORM 1 format.

k Answer Memory

•Whenever you press = after inputting values or an expression, the calculated result is automatically stored in Answer Memory. You can recall Answer Memory contents by pressing

•Answer Memory can store up to 12 digits for the mantissa and two digits for the exponent.

•Answer Memory contents are not changed if the operation performed by any of the above key operations results in an error.

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Basic Calculations

•Use the COMP mode for basic calculations.

• Example 1: 3(510

- R 5 e D 9 T =

• Example 2: 5(97)

5 - R 9 + 7 T =

•You can skip all T operations before =.

–9

)

-08

1.5

80.

Memory Calculations

k Independent Memory

•Values can be input directly into memory, added to memory, or subtracted from memory. Independent memory is convenient for calculating cumulative totals.

•Independent memory uses the same memory area as variable M.

•To clear independent memory (M), input

• Example:

23  9  32 23 53  6  47

) 45  2  90

+ 9 j 3

- 2 A {(Total) –11

, 6 |

0 3

k Variables

• There are nine variables (A through F, M, X and Y), which can be used to store data, constants, results, and other values.

•Use the following operation to delete data assigned to all nine variables:

•Use the following operation to delete data assigned to a particular variable: the data assigned to variable A.

A C =.

0 j 1. This operation deletes

0 j 3.

–11.

32.

47.

90.

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