Casio NP20 User Manual

ALGEBRA FX 2.0

User’s Guide

E

GUIDELINES LAID DOWN BY FCC RULES FOR USE OF THE UNIT IN THE U.S.A. (not appli­cable to other areas).

NOTICE

This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protec­tion against harmful interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guar­antee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.

• Consult the dealer or an experienced radio/TV technician for help.

FCC WARNING

Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Proper connectors must be used for connection to host computer and/or peripherals in order to
meet FCC emission limits.

Connector SB-62 Power Graphic Unit to Power Graphic Unit
Connector FA-123 Power Graphic Unit to PC for IBM/Macintosh Machine

CASIO ELECTRONICS CO., LTD.
Unit 6, 1000 North Circular Road,
London NW2 7JD, U.K.

Important!

Please keep your manual and all information handy for
future reference.

IBM is a registered trademark of International Business Machines Corporation.
Macintosh is a registered trademark of Apple Computer, Inc.

BEFORE USING THE CALCULATOR
FOR THE FIRST TIME...

This calculator does not contain any main batteries when you purchase it. Be sure to
perform the following procedure to load batteries, reset the calculator, and adjust the
contrast before trying to use the calculator for the first time.

1. Making sure that you do not accidently press the o key, slide the case onto the

calculator and then turn the calculator over. Remove the back cover from the calculator
by pulling with your finger at the point marked

P

2. Load the four batteries that come with calculator.

• Make sure that the positive (+) and negative (–) ends of the batteries are facing cor­rectly.

1.

1

BACK UP

3. Remove the insulating sheet at the location marked “BACK UP” by pulling in the direc­tion indicated by the arrow.

BACK UP

4. Replace the back cover, making sure that its tabs enter the holes marked 2 and turn
the calculator front side up. The calculator should automatically turn on power and
perform the memory reset operation.

2

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5. Press m.

• If the Main Menu shown to the right is not on the display,
press the P button on the back of the calculator to
perform memory reset.

P button

6. Use the cursor keys (f, c, d, e) to select the SYSTEM icon and press
w, then press 2(

) to display the contrast adjustment screen.

7. Adjust the contrast.

• The e cursor key makes display contrast darker.

• The d cursor key makes display contrast lighter.

• 1(INIT) returns display contrast to its initial default.

8. To exit display contrast adjustment, press m.

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Quick-Start

Tu rn ing Power On And Off

Using Modes

Basic Calculations
Replay Feature

Fraction Calculations

Exponents
Graph Functions

Dual Graph

Box Zoom

Dynamic Graph
Ta ble Function

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Quick-Start

Quick-Start

Welcome to the world of graphing calculators.

Quick-Start is not a complete tutorial, but it takes you through many of the most common
functions, from turning the power on, and on to graphing complex equations. When
you’re done, you’ll have mastered the basic operation of this calculator and will be ready
to proceed with the rest of this user’s guide to learn the entire spectrum of functions
available.

Each step of the examples in Quick-Start is shown graphically to help you follow along
quickly and easily. When you need to enter the number 57, for example, we’ve indi­cated it as follows:

Press

fh

Whenever necessary, we’ve included samples of what your screen should look like.
If you find that your screen doesn’t match the sample, you can restart from the begin­ning by pressing the “All Clear” button

TURNING POWER ON AND OFF

o

.

To t u r n power on, press o.

To t u r n power off, press

Calculator power turns off automatically if you do not perform any operation within the
Auto Power Off trigger time you specify. You can specify either six minutes or 60
minutes as the trigger time.

!

OFF

o

.

USING MODES

This calculator makes it easy to perform a wide range of calculations by simply
selecting the appropriate mode. Before getting into actual calculations and operation
examples, let’s take a look at how to navigate around the modes.

To s el ect the RUN

1. Press m to display the Main Menu.

•

MAT Mode

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2

Quick-Start

2. Use defc to highlight RUN
and then press w.

This is the initial screen of the RUN
where you can perform manual calculations,
matrix calculations, and run programs.

• MAT Mode,

•

MAT

BASIC CALCULATIONS

With manual calculations, you input formulas from left to right, just as they are written
on paper. With formulas that include mixed arithmetic operators and parentheses, the
calculator automatically applies true algebraic logic to calculate the result.

Example:

1. Press

2. Press

Parentheses Calculations

Example:

15 × 3 + 61

o to clear the calculator.

bf*d+gbw.

15 × (3 + 61)

1. Press

bf*(d
+gb)w.

Built-In Functions

This calculator includes a number of built-in scientific functions, including trigonometric
and logarithmic functions.

Example:

Important!

Be sure that you specify Deg (degrees) as the angle unit before you try this
example.

25 × sin 45˚

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3

Quick-Start

SET UP

1. Pressu

2. Press cccc1 (Deg) to specify

degrees as the angle unit.

3

to display the SET UP screen.

3. Press

4. Press

5. Press

i to clear the menu.

o to clear the unit.

cf*sefw.

REPLAY FEATURE

With the replay feature, simply press d or e to recall the last calculation that

was performed so you can make changes or re-execute it as it is.

Example:

1. Press

2. Press

3. Press

4. Press f.

To change the calculation in the last example from (25 × sin 45˚) to
(25 × sin 55˚)

d to display the last calculation.

d twice to move the cursor (t) to 4.

REPLAY

D to delete 4.

5. Press

w to execute the calculation again.

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