Casio fx-115ES User manual

http://world.casio.com/edu/
RCA502160-001V01
E
fx-115ES
fx-991ES
User's Guide

CASIO Europe GmbH
Bornbarch 10, 22848 Norderstedt, Germany

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About this Manual
•The MATH mark indicates an example that uses Math format,
while the LINE mark indicates Linear format. For details about
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 1or Skey 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 1and then the key to access
the applicable function.
Red Press Sand 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 (1s) before it. Note that this is not part
of the actual key operation you perform.
sin
–1
{D}
s
Keycap function
Alternate function

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•The following shows an example of how a key operation to select
an on-screen menu item is represented in this User’s Guide.
Example: 1(Setup)
Indicates the menu item that is selected by the number
key operation (1) before it. Note that this is not part
of the actual key operation you perform.
•The cursor key is marked with four arrows,
indicating direction, as shown in the
illustration nearby.In this User’s Guide, cursor
key operation is indicated as f, c, d,
and e.
•The displays and illustrations (such as key markings) shown in
this User’s Guide and the separate Appendix 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 liable to anyone for
special, collateral, incidental, or consequential damages in
connection with or arising out of the purchase or use of this product
and items that come with it. Moreover, CASIO Computer Co., Ltd.
shall not be liable for any claim of any kind whatsoever by any
other party arising out of the use of this product and the items that
come with it.
kUsing the Separate Appendix
Whenever you see the symbol Appendix in this manual, it
means you should refer to the separate Appendix.
Example numbers (like “<#021>”) in this User’s Guide refer to the
corresponding example number in the Appendix.
Specify the angle unit in accordance with the marks in the Appendix:
Deg : Specify Degree for the angle unit.
Rad : Specify Radian for the angle unit.
Initializing the Calculator
Perform the following procedure when you want to initialize the
calculator and return the calculation mode and setup to their initial
default settings. Note that this operation also clears all data currently
in calculator memory.
19(CLR)3(All)=(Yes)
•For information about calculation modes and setup settings, see
“Calculation Modes and Calculator Setup”.
•For information about memory, see “Using Calculator Memory”.
REPLAY

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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 kand negative
lends 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.

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Handling Precautions
•Be sure to press the Okey before using the calculator for
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.

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Before Using the Calculator
kRemoving 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.
kTurning Power On and Off
•Press Oto turn on the calculator.
•Press 1A(OFF) to turn off the calculator.
kAdjusting Display Contrast
1N(SETUP)c6(]CONT')
This displays the contrast adjustment screen. Use dand eto
adjust display contrast. After the setting is the way you want, press
A.
•You can also adjust contrast using dand ewhile the mode
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.

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kAbout the Display
Your calculator has a 31-dot ×96-dot LCD screen.
Example:
kDisplay 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 Skey. The alpha input mode will be exited
and this indicator will disappear when you press a
key.
MThere 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.
7The default angle unit is degrees.
8The default angle unit is radians.
9The 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
A
S

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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
kCalculation 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 Nto 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.
kConfiguring 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
cand f.
c
f

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•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(Sci)0–9
Exponential Display Range 1N8(Norm)1(Norm1)
or 2(Norm2)
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
π
2