Casio FX-115ES Manual

Casio Regnemaskine FX-115ES

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RCA502160-001V01

fx-115ES

fx-991ES

User's Guide

CASIO Europe GmbH

Bornbarch 10, 22848 Norderstedt, Germany

E-1

About this Manual

• The MATH mark indicates an example that uses Math format,

while the mark indicates Linear format. For details aboutLINE

input/output formats, see “Specifying the Input/Output Format”.

• Keycap markings indicate what a key inputs or what function it

performs.

Example: , , 1 2 + -, , !, A, etc.

• Pressing the 1 S or key followed by a second key performs

the alternate function of the second key. The alternate function is

indicated by the text printed above the key.

• The following shows what the different colors of the alternate

function key text mean.

If key marking It means this:

text is this color:

Ye llow Press 1 and then the key to access

the applicable function.

Red Press S and then the key to input the

applicable variable, constant, or symbol.

Purple (or enclosed Enter the CMPLX Mode to access the

in purple brackets) function.

Green (or enclosed Enter the BASE-N Mode to access the

in green brackets) function.

• The following shows an example of how an alternate function

operation is represented in this User’s Guide.

Example: 1s(sin–1)1=

Indicates the function that is accessed by the key

operation ( ) before it. Note that this is not part1s

of the actual key operation you perform.

sin

–1

{ }D

Keycap function

Alternate function

E-3

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.

Battery

• After removing the battery from the calculator, put it in a safe

place where it will not get into the hands of small children and

accidentally swallowed.

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

swallowed, consult with a physician immediately.

• Never charge the battery, try to take the battery apart, or allow

the battery to become shorted. Never expose the battery to

direct heat or dispose of it by incineration.

• Improperly using a battery can cause it to leak and damage

nearby items, and can create the risk of fire and personal injury.

• Always make sure that the battery’s positive

k and negative

l ends are facing correctly when you load it into the

calculator.

• Use only the type of battery specified for this calculator 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 risk

of fire and personal injury.

E-4

Handling Precautions

• Be sure to press the key before using the calculator forO

the first time.

• Even if the calculator is operating normally, replace the battery

at least once every three years.

A dead battery can leak, causing damage to and malfunction of

the calculator. Never leave a dead battery in the calculator.

• The battery that comes with this unit discharges slightly during

shipment and storage. Because of this, it may require

replacement sooner than the normal expected battery life.

• Low battery power can cause memory contents to become

corrupted or lost completely. Always keep written records of

all important data.

• Avoid use and storage of the calculator in areas subjected to

temperature 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 be 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 of the calculator in areas subjected to

large amounts of humidity and dust.

Take care never to leave the calculator where it might be splashed

by water or exposed to large amounts of humidity or dust. Such

conditions 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 apart.

• Never press the keys of the calculator with a ballpoint pen or

other pointed object.

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

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 liquid before wiping the calculator. Never use

thinner, benzene or other volatile agents to clean the calculator.

Doing so can remove printed markings and can damage the case.

E-5

Before Using the Calculator

k Removing the Hard Case

Before using the calculator, slide its hard case downwards to remove

it, and then affix the hard case to the back of the calculator as shown

in the illustration below.

k Turning Power On and Off

• Press O to turn on the calculator.

• Press 1A(OFF) to turn off the calculator.

k Adjusting Display Contrast

1N(SETUP) CONTc ]6(')

This displays the contrast adjustment screen. Use d e and to

adjust display contrast. After the setting is the way you want, press

• You can also adjust contrast using while the moded e and

menu (which appears when you press N) is on the display.

Important!

• If adjusting display contrast does not improve display readability, it

probably means that battery power is low. Replace the battery.

E-6

k About the Display

Your calculator has a 31-dot 96-dot LCD screen.×

Example:

k Display Indicators

Sample Display:

This Means this:

indicator:

The keypad has been shifted by pressing the 1

key. The keypad will unshift and this indicator will

disappear when you press a key.

The alpha input mode has been entered by pressing

the S key. The alpha input mode will be exited

and this indicator will disappear when you press a

key.

M There is a value stored in independent memory.

STO

The calculator is standing by for input of a variable

name to assign a value to the variable. This indicator

appears after you press 1t(STO).

RCL

The calculator is standing by for input of a variable

name to recall the variable’s value. This indicator

appears after you press t.

STAT The calculator is in the STAT Mode.

CMPLX The calculator is in the CMPLX Mode.

MAT The calculator is in the MATRIX Mode.

VCT The calculator is in the VECTOR Mode.

7 The default angle unit is degrees.

8 The default angle unit is radians.

9 The default angle unit is grads.

FIX A fixed number of decimal places is in effect.

SCI A fixed number of significant digits is in effect.

Math Math style is selected as the input/output format.

Calculation history memory data is available and can

be replayed, or there is more data above/below the

current screen.

Disp The display currently shows an intermediate result

of a multi-statement calculation.

{

Input expression

Calculation result

CMPLX

E-7

Important!

• For a very complex calculation or some other type of calculation

that takes a long time to execute, the display may show only the

above indicators (without any value) while it performs the calculation

internally.

Calculation Modes and

Calculator Setup

k Calculation Modes

When you want to perform this type of Select this

operation: mode:

General calculations COMP

Complex number calculations CMPLX

Statistical and regression calculations STAT

Calculations involving specific number systems

BASE-N

(binary, octal, decimal, hexadecimal)

Equation solution EQN

Matrix calculations MATRIX

Generation of a number table based on an TABLE

expression

Vector calculations VECTOR

Specifying the Calculation Mode

(1) Press N to display the mode

menu.

(2) Press the number key that corresponds to the mode you want to

select.

• To select the CMPLX Mode, for example, press 2.

k Configuring the Calculator Setup

Pressing 1N(SETUP) displays the setup menu, which you can

use to control how the calculations are executed and displayed. The

setup menu has two screens, which you can jump between using

c and f.

E-8

• See “Adjusting Display Contrast” for information about how to use

“]CONT'”.

Specifying the Input/Output Format

For this input/output format: Perform this key operation:

Math 1N1(MthIO)

Linear 1N2(LineIO)

• Math format causes fractions, irrational numbers, and other

expressions to be displayed as they are written on paper.

• Linear format causes fractions and other expressions to be

displayed in a single line.

Specifying the Default Angle Unit

To specify this as the default Perform this key operation:

angle unit:

Degrees 1N3(Deg)

Radians 1N4(Rad)

Grads 1N5(Gra)

90° = radians = 100 grads

Specifying the Number of Display Digits

To specify this: Perform this key operation:

Number of Decimal Places 1N6(Fix)0 9–

Number of Significant Digits 1N7 0 9(Sci) –

Exponential Display Range 1N8 1(Norm) (Norm1)

or (Norm2)2

Calculation Result Display Examples

• Fix: The value you specify (from 0 to 9) controls the number of

decimal places for displayed calculation results. Calculation results

are rounded off to the specified digit before being displayed.

Example: 100 ÷ 7 = 14.286 (Fix3)

14.29 (Fix2)

• Sci: The value you specify (from 1 to 10) controls the number of

significant digits for displayed calculation results. Calculation results

are rounded off to the specified digit before being displayed.

Example: 1 ÷ 7 = 1.4286 × 10

–1 (Sci5)

1.429 × 10–1 (Sci4)

Linear FormatMath Format

Math

E-9

• Norm: Selecting one of the two available settings (Norm1, Norm2)

determines the range in which results will be displayed in non-

exponential format. Outside the specified range, results are

displayed using exponential format.

Norm1: 10–2 > 10   x, x >10

Norm2: 10–9 > 10   x, x >10

Example: 1 ÷ 200 = 5 × 10

–3 (Norm1)

0.005 (Norm2)

Specifying the Fraction Display Format

To specify this fraction Perform this key operation:

display format:

Mixed 1Nc1(ab/c)

Improper 1Nc2(d/c)

Specifying the Complex Number Display Format

To specify this complex

number format: Perform this key operation:

Rectangular Coordinates 1Nc3 1(CMPLX) ( + )a bi

Polar Coordinates 1Nc3 2(CMPLX) (r∠

)

Specifying the Statistical Display Format

Use the following procedure to turn display of the frequency (FREQ)

column of the STAT Mode STAT editor screen on or off.

To specify this: Perform this key operation:

Show FREQ Column 1Nc4(STAT)1(ON)

Hide FREQ Column 1Nc4(STAT) (OFF)2

Specifying the Decimal Point Display Format

To specify this decimal Perform this key operation:

point display format:

Dot (.)1Nc5(Disp)1(Dot)

Comma (,)1Nc5(Disp)2(Comma)

• The setting you configure here is applied for calculation results

only. The decimal point for input values is always a dot (.).

E-10

k Initializing the Calculation Mode and Other

Settings

Performing the following procedure initializes the calculation mode

and other setup settings as shown below.

19 1 =(CLR) (Setup) (Yes)

This setting: Is initialized to this:

Calculation Mode COMP

Input/Output Format MthIO

Angle Unit Deg

Display Digits Norm1

Fraction Display Format d/c

Complex Number Format a b+i

Statistical Display OFF

Decimal Point Dot

• To cancel initialization without doing anything, press A(Cancel)

instead of =.

Inputting Expressions and

Values

k Inputting a Calculation Expression Using

Standard Format

Your calculator lets you input calculation expressions just as they

are written. Then simply press the = key to execute it. The calculator

automatically judges the calculation priority sequence for addition,

subtraction, multiplication, and division, functions, and parentheses.

Example: 2 (5 + 4) – 2 × (–3) =

LINE

2(5+4)-

2* 3=y

Inputting a Function with Parenthesis

When you input any of the functions shown below, it is automatically

input with the open parenthesis (

(

) character. Next, you need to

input the argument and the closing parenthesis (

)

sin(, cos(, tan(, sin–1(, cos–1(, tan–1(, sinh(, cosh(, tanh(, sinh–1(,

cosh–1(, tanh–1(, log(, ln(, ^(, 10^(, e'(, 3

'(, Abs(, Pol(, Rec(,

∫(, d/dx(, Σ(, P(, Q(, R(, arg(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(

E-11

Example: sin 30 =

LINE

s30)=

Pressing sinputs “sin(”.

• Note that the input procedure is different if you want to use Math

format. For more information, see “Inputting with Math Format”.

Omitting the Multiplication Sign

You can omit the multiplication sign (×) in any of the following cases.

• Before an open parentheses (

(

): 2 (5 + 4), etc.×

• Before a function with parenthesis: 2 × × sin(30), 2 '(3), etc.

• Before a prefix symbol (excluding the minus sign): 2 h123, etc.×

• Before a variable name, constant, or random number:

20 × A, 2 × π, 2 × i, etc.

Final Closed Parenthesis

You can omit one or more closed parentheses that come at the end

of a calculation, immediately before the y is pressed. For= ke

details, see “Omitting a Final Closed Parenthesis”.

Displaying a Long Expression

The display can show up to 14 characters at a time. Inputting the

15th character causes the expression to shift to the left. At this time,

the ] indicator appears to the left of the expression, indicating that

it runs off the left side of the screen.

Input expression: 1111 + 2222 + 3333 + 444

Displayed portion:

• When the ] indicator is displayed, you can scroll left and view the

hidden part by pressing the d key. This will cause the ' indicator

to appear to the right of the expression. At this time, you can use

the e key to scroll back.

Number of Input Characters (Bytes)

• You can input up to 99 bytes of data for a single expression.

Basically, each key operation uses up one byte. A function that

requires two key operations to input (like 1s(sin

–1)) also uses

only one byte. Note, however, that when you are inputting functions

with Math format, each item you input uses up more than one

byte. For more information, see “Inputting with Math Format”.

Cursor

Math

E-12

• Normally the input cursor appears as a straight vertical (

I) or

horizontal ( ) flashing line on the display screen. When there are

10 or fewer bytes of input remaining in the current expression, the

cursor changes shape to

to let you know. If the

cursor

appears, terminate the expression at a convenient point and

calculate the result.

k Correcting an Expression

This section explains how to correct an expression as you are

inputting it. The procedure you should use depends on whether you

have insert or overwrite selected as the input mode.

About the Insert and Overwrite Input Modes

With the insert mode, the displayed characters shift to the left to

make room when you input a new character. With the overwrite mode,

any new character you input replaces the character at the current

cursor position. The initial default input mode is insert. You can change

to the overwrite mode when you need it.

• The cursor is a vertical flashing line (

I) when the insert mode is

selected. The cursor is a horizontal flashing line ( ) when the

overwrite mode is selected.

• The initial default for Linear format input is the insert mode. You

can switch to the overwrite mode by pressing 1Y(INS).

• With Math format, you can only use the insert mode. Pressing

1Y(INS) when the Math format is selected does not switch to

the overwrite mode. See “Incorporating a Value into a Function” for

more information.

• The calculator automatically changes to the insert mode whenever

you change the input/output format from Linear to Math.

Changing the Character or Function You Just Input

Example: To correct the expression 369 × 13 so it becomes

369 × 12

LINE 369*13

E-13

Deleting a Character or Function

Example: To correct the expression 369 × × 12 so it becomes

369 × 12

LINE Insert Mode:

369**12

Overwrite Mode:

369**12

ddd

Correcting a Calculation

Example: To correct cos(60) so it becomes sin(60)

LINE Inser t Mode:

c60)

dddY

Overwrite Mode:

c60)

dddd

Inserting Input into a Calculation

Always use the insert mode for this operation. Use d e or to

move the cursor to the location where you want to insert new input,

and then input what you want.

E-14

k Displaying the Location of an Error

If an error message (like “Math ERROR” or “Syntax ERROR”)

appears when you press , press =d or e. This will display the

part of the calculation where the error occurred, with the cursor

positioned at the error location. You can then make necessary

corrections.

Example: When you input 14 ÷ × ÷ 0 2 = by mistake instead of 14

10 × 2 =

Use the insert mode for the following operation.

LINE

14/0*2=

Press e or d.

This is causing the error.

You can also exit the error screen by pressing , which clears theA

calculation.

k Inputting with Math Format

When inputting with Math format, you can input and display fractions

and some functions using the same format as they appear in your

textbook.

Important!

• Certain types of expressions can cause the height of a calculation

formula to be greater than one display line. The maximum allowable

height of a calculation formula is two display screens (31 dots × 2).

Further input will become impossible if the height of the calculation

you are inputting exceeds the allowable limit.

• Nesting of functions and parentheses is allowed. Further input will

become impossible if you nest too many functions and/or

parentheses. If this happens, divide the calculation into multiple

parts and calculate each part separately.

Produkt Specifikationer

Mærke:	Casio
Kategori:	Regnemaskine
Model:	FX-115ES
Type:	Videnskabelig
Produktfarve:	Sølv
Kontroltype:	Knapper
Formfaktor:	Lomme
Automatisk slukning:	Ja
Husmateriale:	Plast
Strømkilde:	Batteri/Solar
Anden skærm:	Ingen
Baggrundsbelysning:	Ingen
Tekstlinjer:	2 Linier
Hukommelsesregistre:	7
Overdækning:	Ja
Cifre:	12 cifre