Casio E-Con EA-200 User manual

User’s Guide
EA-200
http://world.casio.com/edu_e/
E

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 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.
•The contents of this manual are subject to change without notice.
•No part of this manual may be reproduced in any form without the express written
consent of the manufacturer.
Important!
Please keep your manual and all information handy for future reference.
CASIO ELECTRONICS CO., LTD.
Unit 6, 1000 North Circular Road,
London NW2 7JD, U.K.
Declaration of Conformity
Model Number: EA-200
Trade Name: CASIO COMPUTER CO., LTD.
Responsible party: CASIO, INC.
Address: 570 MT. PLEASANT AVENUE, DOVER, NEW JERSEY 07801
Telephone number: 973-361-5400
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may
cause undesired operation.
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 EA-200 to Power Graphic Unit

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Contents
–– English ––
Handling Precautions ............................................................................ 0-2
Unpacking .............................................................................................0-3
About the EA-200 ................................................................................. 0-3
Before Using the EA-200 for the First Time .......................................... 0-3
Chapter 1
General Guide ...................................................................................... 1-1
Supported Calculator Models ...............................................................1-2
Supported Probes ................................................................................. 1-2
Using Commands ................................................................................. 1-3
Using the Voltage Probe, Temperature Probe, Optical Probe,
and Motion Sensor (EA-2) ....................................................................1-3
Using the Built-in Microphone ...............................................................1-4
Using the Built-in Speaker ....................................................................1-5
Status Request ..................................................................................... 1-5
Auto Setup ............................................................................................ 1-5
Group Link Function .............................................................................1-6
Chapter 2
 Examples
Uniformly Accelerated Motion ........................................................... 2-1-1
Period of Pendular Movement ........................................................... 2-2-1
Conservation of Momentum .............................................................. 2-3-1
Charles’ Law ..................................................................................... 2-4-1
Polarization of Light .......................................................................... 2-5-1
Natural Frequency and Sound .......................................................... 2-6-1
Column of Air Resonance and the Velocity of Sound ....................... 2-7-1
Construction of the Musical Scale .................................................... 2-8-1
Direct Current and Transient Phenomena ......................................... 2-9-1
AC Circuit ........................................................................................ 2-10-1
Dilute Solution Properties ............................................................... 2-11-1
Exothermic Reaction....................................................................... 2-12-1
Electromotive Force of a Battery..................................................... 2-13-1
Sunlight and Solar Cells ................................................................. 2-14-1
Topographic Conditions and Climate .............................................. 2-15-1
 Program Library .................................................................. 2-16-1
Appendix A Command Tables
Command 1 – Channel Setup .......................................................... α-1-1
Command 3 – Sample and Trigger Setup ......................................... α-1-2
Command 4 – Conversion Equation Setup ....................................... α-1-3
Command 5 – Data Range Setup ..................................................... α-1-3
Command 6 – System Setup ............................................................ α-1-4
Command 8 – Sampling Start .......................................................... α-1-4
Command 10 – Sensor Warmup ...................................................... α-1-4
Command 11 – Buzzer and LED Operation Commands .................. α-1-4
Command 12 – Data Send Sequence .............................................. α-1-4
Appendix B Specifications ............................................... α-2-1

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•The EA-200 is made up of precision components. Never try to take it apart.
•Avoid dropping the EA-200 and subjecting it to strong impact.
•Do not store the EA-200 or leave it in areas exposed to high temperatures, humidity, low
temperatures, or large amounts of dust. Low temperatures can shorten battery life.
•Replace the main batteries once every two years regardless of how much the EA-200 is
used during that period. Never leave dead batteries in the battery compartment. They
can leak and damage the unit.
•Keep batteries out of the reach of small children. If swallowed, consult with a physician
immediately.
•Avoid using volatile liquids such as thinner or benzine to clean the unit. Wipe it with a
soft, dry cloth, or with a cloth that has been dipped in a solution of water and a neutral
detergent, and wrung out.
•In no event will the manufacturer and its suppliers be liable to you or any other person
for any damages, expenses, lost profits, lost savings or any other damages arising out of
loss of data and/or formulas arising out of malfunction, repairs, or battery replacement.
The user should prepare physical records of data to protect against such data loss.
•Never dispose of batteries, or other components by burning them.
•Replace batteries as soon as possible after the low battery indicator lamp (Batt) lights.
•Be sure that the power switch is set to OFF when replacing batteries.
•If the EA-200 is exposed to a strong electrostatic charge, its memory contents may be
corrupted or the keys may stop working. In such a case, perform the Reset operation to
clear memory contents and restore normal key operation.
•If you start to experience serious operational problems with the EA-200, use a thin,
pointed object to carefully press the P button on the back of the EA-200. Note, however,
that pressing the P button deletes all data currently in EA-200 memory. Proper operation
does not resume after you press the P button, remove its batteries, and then replace
them correctly in accordance with the instructions on page 0-3 of the User’s Guide.
•Note that strong vibration or impact during program execution can cause execution to
stop or can corrupt EA-200 memory contents.
•Using the EA-200 near a television or radio can cause interference with TV or radio
reception.
•Before assuming malfunction of the EA-200, be sure to carefully reread this User’s
Guide and ensure that the problem is not due to insufficient battery power, programming
or operational errors.
Handling Precautions •Never allow foreign objects to get into connector holes. Doing so can result in
malfunction.
•Always make sure to connect probes only to their correct terminals. Never force the plug
of a probe into a wrong terminal connector.
•Be sure to turn the EA-200 off before connecting or disconnecting probes.
•Make sure that probes are connected securely before using them to take samples.
•Never insert a probe into an electric outlet. Never attempt to measure high voltages or
household AC. Doing so creates the danger of electric shock.
•Never apply more than 15V to analog channels CH1 or CH2, more than 5V to analog
channel CH3, or more than 5.5V to the SONIC, DIG IN, or DIG OUT channels. Doing so
can damage the EA-200.
•The EA-200 is to be used for educational purpose only. It is not appropriate for
industrial, research, medical, or commercial applications.
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User’s Guide
EA-200
http://world.casio.com/edu_e/
E
Unpacking
EA-200 Soft case Data communication cable
(SB-62)
Temperature probe Optical probe Voltage probe
Four AA-size alkaline batteries AC adaptor User’s Guide (this manual)
About the EA-200
The EA-200 is a digital device that makes it possible for you to sample data connected with
everyday natural phenomena.
Data You Can Sample with the EA-200
Various different sensors can be used with the EA-200 to sample temperatures, light,
voltage, distance, and other data. The EA-200 supports sampling of up to 120,000 points,
and simultaneous sampling over five channels. Sampled data can be sent to a compatible
Graphic Scientific Calculator, where it can be viewed and graphed.
Before Using the EA-200 for the First
Time
Power Requirements
Your EA-200 requires four AA-size alkaline batteries for power. Battery life depends on the
amount of time the EA-200 is left on, and the amount of current used by the connected
probe(s). A low battery indicator lamp (Batt) lights to let you know when it is time to replace
batteries. To extend battery life, it is a good idea to use the AC adaptor for power whenever
sampling indoors.
When using the EA-200 in combination with the optional “Motion Sensor (EA-2)”, be sure to
power the EA-200 using its bundled AC adaptor (AD-A60024).
Though the EA-200 can normally operate on battery power, separate AC adaptor power is
required while the optional “Motion Sensor (EA-2)” is being used.
Batteries are not loaded in the EA-200 when it is shipped from the factory. Because of this,
use the following procedure to load batteries into the EA-200 before using it for the first time.
To load batteries
1. Remove the battery cover by pulling with your finger at the
point marked 1. If there are batteries in the battery
compartment, remove all four of them.
2. Load four new AA-size batteries. Make sure that the plus and
minus ends of the batteries are facing in the directions shown
by the markings inside the battery case. Replace the battery
cover.
3. Slide the [ON/OFF] switch to turn on the EA-200. To turn off,
slide the [ON/OFF] switch again.
0-3
1
2
Using the Soft Case
1

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Auto Power Off (APO)
To extend battery life, power automatically turns off if you do not perform any operation for
about 30 minutes. APO is disabled automatically whenever the EA-200 is standing by for
sampling (ready state), or while sampling is in progress.
Extended Sampling Mode
The Extended Sampling Mode makes it possible to sample data over an extended period
when operating under battery power. The following are the features of the Extended
Sampling Mode.
•In the Extended Sampling Mode, sampling continues even though the power lamp is not
lit.
•The Extended Sampling Mode is entered automatically whenever the sampling interval
is five minutes or longer.
•To exit the Extended Sampling Mode, press the [START/STOP] key. Note that all other
keys are disabled in the Extended Sampling Mode.
When to Replace Batteries
Replace batteries as soon as possible after the low battery indicator lamp (Batt) lights. The
EA-200 may start to malfunction if you continue to use it while battery power is low.
•Be sure to replace the batteries at least once every two years, no matter how much you
use the EA-200 during that time.
•The batteries that come with this EA-200 discharge slightly during shipment and
storage. Because of this, they may require replacement sooner than the normal
expected battery life.
•Before removing the batteries, make sure you make a separate copy of sample data by
transferring it to a Graphic Scientific Calculator or some storage device. Cutting off all
power to the EA-200 by removing its batteries while the AC adaptor is not connected
causes all of the data in memory and all settings to be cleared.
•Whenever performing a sampling operation that requires more than a few minutes, we
recommend that you power the EA-200 using the AC adaptor. This will help to ensure
stable sampling operations.
AC Adaptor
Warning!
•Make sure the voltage of the power supply you are connecting to matches that of the
rating marked on the EA-200. Do not overload extension cords and wall outlets. Failure
to follow these precautions creates the danger of fire and electric shock.
•Never allow the power cord to become damaged, cracked, or broken. Never modify the
power cord in any way, and never subject it to excessive twisting or pulling. Never place
heavy objects on power cord and do not expose it to direct heat. A damaged power cord
creates the danger of electric shock.
•Never touch the AC adaptor while your hands are wet. Doing so creates the danger of
electric shock.
Caution!
•Always grasp the adaptor box and never pull on the power cord when unplugging the AC
adaptor. Doing so runs the risk of damaging the cord and creating the danger of fire and
electric shock.
•Be sure to always unplug the AC adaptor whenever leaving the EA-200 unattended for
long periods.
•Use only the special AC adaptor that is specified for the EA-200.
•Use of any other type of AC adaptor creates the risk of serious problems with and
damage to the EA-200 and/or AC adaptor. Never use another type of AC adaptor. Note
that any damage due to use of the wrong type of adaptor is not covered by your
warranty.
• Make sure you turn off the EA-200 before connecting the AC adaptor.
•The AC adaptor may become warm if you use it for a long time. This is normal and does
not indicate malfunction.
To connect the AC adaptor to the EA-200
1. Slide the [ON/OFF] switch to turn off the EA-200.
2. Plug the AC adaptor into the port on the lower left of the EA-200.
3. Plug the other end of the AC adaptor into a wall outlet.
4. Slide the [ON/OFF] switch to turn on the EA-200.
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Chapter 1
General Guide
P button (rear side)*2
Key Functions and Indicator Lamps
 Key Functions
To do this: Press this key:
Start a sampling operation from the ready state [START/STOP]
Stop an ongoing sampling operation [START/STOP]
Use Auto Setup (See “Auto Setup” on page 1-5.) [SET UP]
Cancel the ready state [SET UP]
 Indicator Lamps
When this indicator lamp: Does this: It means this:
Power (Green) Lights Power is on.
Ready (Green) Lights EA-200 is standing by for data (ready state).
Sampling (Green) Flashes Sampling is in progress.
Error (Red) Lights An error occurred.
Batt (Red) Lights It is time to replace the batteries.
1-1
Ready Sampling Error Batt Power
SET UP START/STOP
•While the “Ready” lamp is lit, press the [START/STOP] key to start sampling.
•To cancel the ready state, press the [SET UP] key.
•To interrupt a sampling operation, press the [START/STOP] key.
•For details about errors, see “Status Request” on page 1-5.
*1When using the EA-200 in combination
with the optional “Motion Sensor (EA-2)”,
be sure to power the EA-200 using its
bundled AC adaptor (AD-A60024).
*2If you start to experience serious operational problems with the EA-200, use a thin, pointed
object to carefully press the P button on the back of the EA-200. Note, however, that pressing
the P button deletes all data currently in EA-200 memory. Proper operation does not resume
after you press the P button, remove its batteries, and then replace them correctly in
accordance with the instructions on page 0-3 of the User’s Guide.
Digital input/output port
Serial 232C (9-pin) port
(for cross cable)
External microphone 2-pin port
(for condenser microphone)
Volume
External speaker 2-pin port
AC adaptor port
SONIC Channel
EA-2*1
Calculator 3-pin
communication port
(SUB port) ×7
Calculator 3-pin
communication port
(MASTER port)
ON/OFF switch
SET UP key START/STOP key
Data communication
cable
Analog Channels ×3
(Analog output for CH3 only)
Built-in microphone
Built-in speaker
Indicator lamps
0
180
10
MotionSenso
CH3 CH2 CH1

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Supported Calculator Models
Connection to a supported scientific calculator is essential if you want to get the most out of
your EA-200. A connected Graphic Scientific Calculator sends commands that control the
EA-200 during transfer of sampled data and other operations. Transferred data can be
graphed on the calculator. For details about commands, see “Using Commands” on page
1-3, and “Command Tables” on page α-1-1.
Supported Calculator Models
ALGEBRA FX Series CFX-9850/fx-7400 Series
ALGEBRA FX 2.0 PLUS CFX-9950GB PLUS
ALGEBRA FX 2.0 CFX-9850GB PLUS
FX 1.0 PLUS CFX-9850Ga PLUS
FX 1.0 CFX-9850G PLUS
CFX-9970G
fx-9750G PLUS
CFX-9950G
CFX-9850G
fx-7400G PLUS
fx-7450G
Supported Probes
A probe is a sensor that connects to the EA-200 for sampling temperature, light, and other
data.
The EA-200 comes with the three probes described below.
• Voltage Probe................... Measures voltage in the range of –10V to +10V.
CH3 measures in the range of –5V to +5V.
• Optical Probe ................... Measures luminance in the range of 100 to 999.
• Temperature Probe .......... Measures temperature in the range of –20°C to 130°C.
Connecting a Probe to a Channel
A probe connects to an input/output port called a “channel.” The EA-200 has seven
channels: three analog channels (CH1, CH2, CH3), one sonic channel (SONIC), one digital
input/output channel (DIG I/O), a microphone channel, and a speaker channel. You can
connect probes individually, or you can connect multiple probes for simultaneous sampling.
You can use commands to configure the settings for the channel being used for sampling, to
specify how sampled data should be handled, etc.
CH1, CH2, CH3
These channels are for the probes (voltage, temperature, optical) that come bundled with
the EA-200.
SONIC
This channel is for connection of an optional “Motion Sensor (EA-2)”.
DIG I/O
This port is for input and output of an 8-bit binary signal in the range of 0V to 5V.
This could be used, for example, to light an LED.
Built-in Microphone
The microphone can be used to sample sound.
Built-in Speaker
The speaker can be used to output sound samples.
Connecting the EA-200 to a Supported Calculator
Use the special data communication cable to connect the EA-200 to a supported Graphic
Scientific Calculator model.
(1) Turn off the EA-200 and the calculator.
(2) Connect one end of the special data communication cable to the scientific calculator.
(3) Connect the other end of the cable to the EA-200’s MASTER port.
• Insert the plugs as far as they will go. If you experience problems when transferring data,
check to make sure that both plugs are fully inserted.
• Be sure to read the user documentation that comes with the scientific calculator you are
connecting.

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Using Commands
Basically, the EA-200 is controlled by commands from the connected calculator. This section
explains how to send commands from the calculator to the EA-200.
To use a command, you store parameters as List data on the calculator, and then use the
Send command to send the parameters to the EA-200.
EA-200 Operation
The following is an outline of the EA-200 command receive process.
1Slide the EA-200 [ON/OFF] switch to turn on power.
2EA-200 receives Command 0 sent from the calculator.
• This initializes the EA-200 setup.
3EA-200 receives Command 1 sent from the calculator.
• This configures EA-200 channel settings.
4EA-200 receives Command 3 sent from the calculator.
• This configures EA-200 sampling conditions.
• After sampling conditions are configured, the EA-200 enters the ready state.
5Press the EA-200 [START/STOP] key.
• This puts the EA-200 into sampling mode.
• Sampling ends in accordance with the sampling conditions configured in step 4.
6Sample data is sent from the EA-200 to the calculator in response to a Receive
command.
Sending a Command
Example 1: To initialize the EA-200 setup
{0} → List 1__
__
_Stores {0} to List 1. 0 is the command number.
Send (List 1)__
__
_Sending List 1 executes Command 0.
Example 2: To configure channel settings
{1, 1, 2} → List 1__
__
_Stores {1,1,2} to List 1. The first 1 is the command number, the
second 1 is the channel number, and the 2 indicates use of the
voltage probe.
Send (List 1)__
__
_Sending List 1 executes Command 1.
Receive Data Command
As with command execution, all of the operations required to receive data from the EA-200
to the calculator are performed on the calculator.
You can transfer sampled data by executing the calculator's Receive command.
Data is transferred in the sequence shown below.
Record Time →CH1 →CH2 →CH3 →SONIC
Receive (List 1)__
__
_Stores transferred data into List 1 of the calculator.
Using the Voltage Probe, Temperature
Probe, Optical Probe, and Motion Sensor
(EA-2)
The following examples show how to use the temperature probe, voltage probe, optical
probe, and “Motion Sensor (EA-2)”. Perform the procedures in each example by creating
programs on the calculator.
Taking 60 samples at one-second intervals over one minute
(1) Send Command 0 to initialize the EA-200 setup.
{0} → List 1__
__
_Stores {0} to List 1. 0 is the command number.
Send (List 1)__
__
_Sending List 1 executes Command 0.

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(2) Send Command 1 to configure channel settings.
• Voltage Probe (that is connected to CH1.)
{1, 1, 2} → List 1__
__
_The first 1 is the command number, the second 1 is the
Send (List 1)__
__
_channel number, and the 2 indicates use of the voltage
probe.
• Temperature Probe (that is connected to CH1.)
{1, 1, 7} → List 1__
__
_The first 1 is the command number, the second 1 is the
Send (List 1)__
__
_channel number, and the 7 indicates use of the temperature
(Celsius) probe.
• Optical Probe (that is connected to CH1.)
{1, 1, 9} → List 1__
__
_The first 1 is the command number, the second 1 is the
Send (List 1)__
__
_channel number, and the 9 indicates use of the optical probe.
• Optional “Motion Sensor (EA-2)” (that is connected to SONIC channel.)
{1, 4, 2} → List 1__
__
_1 is the command number, 4 is the channel number
Send (List 1)__
__
_(SONIC), and 2 indicates use of the motion sensor (meters).
(3) Send Command 3 to configure measurement condition settings.
{3, 1, 60} → List 1__
__
_3 is the command number, 1 is the sampling interval, and 60
is the number of samples.
Send (List 1)^^
^^
^You can change sampling conditions by using different
sampling interval and number of samples values, if you want.
At this time, the Ready lamp lights on the EA-200.
Press the EA-200 [START/STOP] key to start sampling.
When sampling is complete, press the calculator’s wkey to restart the program.
^^
^^
^(Disp command) causes processing to stop until you press the wkey.
(4) Sample data from the EA-200 is received by the calculator.
Receive (List 1)__
__
_Record Time data is received and stored in List 1.
Receive (List 2)__
__
_Sampling Data of CH1 is received and stored in List 2.
Using the Built-in Microphone
To take 255 samples at 50µs intervals
(1) Send Command 0 to initialize the EA-200 setup.
{0} → List 1__
__
_Stores {0} to List 1. 0 is the command number.
Send (List 1)__
__
_Sending List 1 executes Command 0.
(2) Send Command 1 to specify microphone as the channel.
{1, 10} →List 1__
__
_1 is the command number, and 10 indicates use of
Send (List 1)__
__
_the built-in microphone.
(3) Send Command 3 to configure measurement condition settings.
{3, 0.00005, 255} →3 is the command number, 0.00005 is the sampling interval
List 1__
__
_(50µs), and 255 is the number of samples.
Send (List 1)^^
^^
^You can change sampling conditions by using different
sampling interval and number of samples values, if you want.
At this time, the Ready lamp lights on the EA-200.
Press the EA-200 [START/STOP] key to start sampling.
When sampling is complete, press the calculator’s wkey to restart the program.
^^
^^
^(Disp command) causes processing to stop until you press the wkey.
(4) Sample data from the EA-200 is received by the calculator.
Receive (List 1)__
__
_Record Time data is received and stored in List 1.
Receive (List 2)__
__
_Sampling Data of microphone is received and stored in List 2.
•When using the built-in microphone for sampling,
position it so it is about two or three centimeters
from the sound source.
•If the graph shows that the sampled sound is exceeding the sampling range as
shown below, either lower the volume of the sound source or move the microphone
further away from the sound source.

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Using the Built-in Speaker
To output sound recorded by the built-in microphone
(1) Send Command 0 to initialize the EA-200 setup.
{0} → List 1__
__
_Stores {0} to List 1. 0 is the command number.
Send (List 1)__
__
_Sending List 1 executes Command 0.
(2) Send Command 1 to specify microphone as the channel.
{1, 10} →List 1__
__
_1 is the command number, and 10 indicates use of
Send (List 1)__
__
_the built-in microphone.
(3) Send Command 3 to configure measurement condition settings.
{3, 0.00005, 120000} 3 is the command number, 0.00005 is the sampling interval
→List 1__
__
_(50µs), and 120000 is the number of samples.
Send (List 1)^^
^^
^You can change sampling conditions by using different
sampling interval and number of samples values, if you want.
At this time, the Ready lamp lights on the EA-200.
Press the EA-200 [START/STOP] key to start sampling.
When sampling is complete, press the calculator’s wkey to restart the program.
^^
^^
^(Disp command) causes processing to stop until you press the wkey.
(4) Send Command 0 to initialize the EA-200 setup.
{0} → List 1__
__
_Stores {0} to List 1. 0 is the command number.
Send (List 1)__
__
_Sending List 1 executes Command 0.
(5) After sampling is complete, use Command 1 to configure speaker settings.
{1,12, 5,10} →List 1__
__
_1 is the command number, 12 specifies the speaker as the
Send (List 1)__
__
_channel, 5 is the number of loops, and 10 specifies output of
values sampled by the microphone.
(6) Re-configure the sampling condition settings.
{3,0.00005,120000} 3 is the command number, 0.00005 is the sampling interval
→List 1__
__
_(50µs), and 120000 is the number of samples.
Send (List 1)^^
^^
^You can change sampling conditions by using different
sampling interval and number of samples values, if you want.
(7) Press [START/STOP] to output the sound recorded with the microphone.
Status Request
This function can be used to fetch the current status of the EA-200.
To use Status Request
{7} → List 1__
__
_Sends Command 7.
Send (List 1)__
__
_
Receive (List 1)__
__
_Receives the status information and stores it in List 1.
Line 1 Line 2 Line 3 Line 4
Status Error Code Battery Condition OS Version
0: Standby = O: Normal 0 to 999 Version No.
( No Sample Data in EA-200 )≠O: Error
1: Ready Integer: Command number < 450:
2: Sampling Decimal Part: Parameter position low battery
3: Standby
( Sample Data in EA-200 )Example: 3.2
Second parameter of Command 3.
Sampling interval value error
Auto Setup
Auto Setup detects the Auto-ID of a probe, and configures applicable settings automatically.
The three probes (voltage, temperature, optical) that come bundled with the EA-200 have
Auto-IDs.*1
To use Auto Setup
1. Connect a probe to a channel.
2. Slide the [ON/OFF] switch to turn on power.
•This causes the Power lamp to light.
3. Press the [SET UP] key.
•This causes the Ready lamp to light.
*1The optional “Motion Sensor (EA-2)” does not have an Auto-ID.

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4. Press the EA-200 [START/STOP] key to start sampling.
•The Sampling lamp flashes as sampling is performed.
5. Press the [START/STOP] key again to stop sampling.
6. Connect the EA-200 to the calculator, and then use the Receive command to transfer
the sampled data (see the “Receive Data Command” on page 1-3).
•Data is transferred in the following sequence:
Record Time →SONIC →CH1 →CH2 →CH3.
•Any channel that is not being used is skipped automatically.
Group Link Function
A single EA-200 can be used to connect one “MASTER” calculator to up to seven other
“SUB” calculators to distribute programs, data, etc.*1Note, however, that you cannot have
the following calculator models connected to the EA-200 at the same time.*2
•ALGEBRA FX Series
•CFX-9850/fx-7400 Series*3
To perform a Group Link operation
1. Use a Link Cable (SB-62) to connect the calculator that contains the data you want to
send to the MASTER port of the EA-200.
2. Use a Link Cable (SB-62) to connect the calculators to which you want to send the
data to the SUB ports of the EA-200).
3. Slide the [ON/OFF] switch of the EA-200 to turn it on.
4. On all of the SUB calculators, use the LINK application to enter the Receiving Mode.
5. On the MASTER calculator, use the LINK application to transmit the data.
6. The data transfer operation is over when the message “Complete” appears on the
displays of the MASTER calculator and all of the SUB calculators.
Teacher Calculator
Teacher EA-200
Group Leader 1 Calculator
Group Leader 2 Calculator
Group Leader 3 Calculator
Group Leader Calculator
Group EA-200
Group Member 1 Calculator
Group Member 2 Calculator
Group Member 3 Calculator
Example Operation
The example below shows how a teacher can use the EA-200 Group Link function to
distribute a sampling program and sampled data.
1. Students are divided into multiple groups, and each group has its own EA-200. The
teacher uses his or her EA-200 to distribute a sampling program to each of the group
leaders.
2. Each group uses the EA-200 to perform sampling using the program that was
distributed to the group leader’s calculator from the teacher’s calculator. After sampling
is complete, the EA-200 Group Link function is used to distribute the sampled data to
the calculator of each group member.
Important!
•You can create your own sampling program while referring to the Program Library on
page 2-16-1, or you can download a program at the CASIO Website:
http://world.casio.com/edu_e/
*1Backup data cannot be distributed.
*2See the “Supported Calculator Models” on page 1-2 for more information about compatibility
between various calculator models.
*3fx-7400 Series calculators support Program and List data only.

 Examples
Uniformly Accelerated Motion
Period of Pendular Movement
Conservation of Momentum
Charles’ Law
Polarization of Light
Natural Frequency and Sound
Column of Air Resonance and the Velocity of Sound
Construction of the Musical Scale
Direct Current and Transient Phenomena
AC Circuit
Dilute Solution Properties
Exothermic Reaction
Electromotive Force of a Battery
Sunlight and Solar Cells
Topographic Conditions and Climate
 Program Library
Chapter 2

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Activity: SetupActivity: Setup
2-1-1
쐽Equipment
Cart Ramp Stand Protractor
Distance Measurement Setup (EA-200, graphic scientific calculator, data communication
cable, optional EA-2*1)
쐽Setting Up
uAffix the EA-2 to the arm of the stand.
uMeasure the incline of the ramp with the protractor, and fix the ramp at an angle of 15
degrees.
This activity observes the movement of a cart down an incline and investigates uniformly
acceleration motion caused by gravity.
A cart placed on an inclined ramp starts to move straight down the ramp. This movement is
due to the force of gravity acting on the cart to pull it down the incline and pulling it against
the ramp. The distribution of these two forces depends on the inclination of the ramp. The
acceleration of the cart is determined by the magnitude of the force that moves the cart.
Movement represented by an acceleration value that does not change over time is called
“uniformly accelerated motion.” The movement of the cart described above is uniformly
accelerated motion. As shown below, the velocity of uniformly accelerated motion is
proportional to time, and the distance traveled is proportional to the time squared. This
means that if you observe the distance covered by the cart over a specific time, you can
determine its acceleration.
F(N) : Force Acting on Cart in
Direction of the Ramp Surface
a(m/s2):Cart Acceleration
m(kg) : Cart Mass
g(m/s2):Gravitational Acceleration
θ (°):Ramp Angle of Inclination
v(m/s) : Cart Velocity
t(s) : Cart Travel Time
L(m) : Distance Traveled by Cart
Uniformly Accelerated Motion
Theory
1Desk
2Ramp
3EA-2 (SONIC)
4Cart Mass:
m(kg)
5Distance Between Cart
and EA-2: 60cm
6Protractor
7Ramp Angle: 15 degrees
8Hand
1Stand
2Ramp
3Desk
4EA-2 (SONIC)
5Protractor
6Ramp Angle:
15 degrees
7Distance from EA-2 to
end of ramp: 150cm
8Ramp Width: 30cm
9EA-200
Though actual gravitational acceleration depends on latitude and elevation, this activity can be
conducted using the gravitational constant 9.8m/s2.
uMeasure the mass of the cart, place it onto the ramp, and hold it in place with your hand.
F=ma =mg sin
v=at
L= at2
θ
1
2
*1When using the EA-200 in combination with the optional ‘‘Motion Sensor (EA-2) ”, be sure to
power the EA-200 using its bundled AC adaptor (AD-A60024).
*1

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Activity: Operating the EquipmentActivity: Operating the Equipment
MeasurementMeasurement
2-1-2
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쐽Measuring Data
uPrepare the Distance Measurement Setup. Immediately after starting the measurement
operation, let the cart go.
uWhen the cart reaches the desk, stop it.
uGraph the data on the calculator, observe its characteristics, and compare it with
theoretical expectations.
uChange the angle of the ramp 10 degrees and then 20 degrees, and measure again.
uObserve how the graph changes as the ramp angle is changed.
쐽Calculator Operation
uFind the applicable program in the Program Library (P.2-16-1), input it into your calculator,
and then run it.
uDisplay graphs for the distance traveled, velocity, and acceleration of the cart.
L(m) : Distance Traveled by Cart
v(m/s):Cart Velocity
a(m/s2):Cart Acceleration
t(s):Cart Travel Time
1Protractor
2Ramp Angle: 15 degrees
3Ramp Angle: 10 degrees
4Ramp Angle: 20 degrees
uStudy the relationships between the changes of distance traveled, velocity, and
acceleration.
uConsider the reasons why the graphs change as the angle of the ramp is altered.
uFind out how the graph is affected when the mass of the cart is changed by
placing a weight on it.

20020601
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쐽Equipment
String with little elasticity Weight Stand Height adjustment blocks (2)
Optical Measurement Setup (EA-200, graphic scientific calculator, data communication
cable, optical probe)
쐽Building a Pendulum
uSecuring the fixed point of the pendulum so it cannot move, assemble the pendulum as
shown in the illustration.
쐽Setting Up
uAlign the heights of the optical probe and flashlight so the flashlight is shining directly at
the probe.
uSet up the pendulum so the weight blocks the light to the optical probe when it is at rest.
2-2-1
In this activity, we create a simple pendulum and then visually check the periodicity of its
movement, while determining its period.
A pendulum is a string whose one end is fixed and whose other end has a weight attached
to it. As the weight swings, it keeps returning to the same position at the same velocity over
time. Such motion is called “periodic motion,” and the time it takes for the weight to return to
a particular state is called its “period.” A high-precision pendulum can continue to swing for
a very long time with little change in its period over time. This is why such a pendulum is
often used for timepieces.
A pendulum that moves across a single plane is called a simple pendulum. When the
amplitude of the pendulum is sufficiently short in relation to its length, the period of a simple
pendulum can be expressed as shown below.
R(cm) : Pendulum Length
g(cm/s2):Gravitational Acceleration
m(g) : Mass of Weight
T(s) : Period
All of this means that if gravitational acceleration is a fixed value that depends on the
location where the activity is performed, then the period depends on the length of pendulum
only.
With this activity, a pendulum is setup between a light source and an observer. The shadow
created by the weight makes it possible to observe the periodicity of the pendular motion.
Period of Pendular Movement
Theory
Though actual gravitational acceleration depends on latitude and elevation, this activity can be
conducted using the gravitational constant. When gravitational acceleration is 980cm/s2and
the length of the pendulum is 25cm, the oscillation period of the pendulum is about one second.
T = 2πR
g
1Stand
2Pendulum Length: 30cm
3Fixed Point
4String
5Weight: 100g
6Weight Size: 3cm
7Height: 2cm
8Desk
1Flashlight
2Optical Probe (Observer) (CH1)
3EA-200
4Distance Between Weight and Optical Probe: 10cm
5Desk
Activity: SetupActivity: Setup
1Fixed Point

20020601
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쐽Calculator Operation
uPerform the following operation to prepare for light measurement using the optical probe.
Using E-CON
Using a Calculator Program
Find the applicable program in the Program Library (P.2-16-1), input it into your calculator,
and then run it.)
uDetermine the period from graphs of the measurement results obtained at each
measurement position.
L:Light Intensity
t(s) :Time
T(s):Period
2-2-2
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uFind out how the period changes when you change the length of the pendulum.
uFind out how the period changes when you change the mass of the weight.
uFind out how the period changes when you change the size of the weight.
uFind out how the period changes when you change the amplitude.
uFind out what happens when you use an iron or magnetic weight with a magnetic
sheet under the weight.
uConsider why the period changes under the conditions described above.
Activity: Operating the EquipmentActivity: Operating the Equipment MeasurementMeasurement
쐽Measuring Data
uPrepare the Optical Measurement Setup.
uTaking care not to allow the string to go slack, move the weight as shown in the illustration
and then gently let it go.
uAfter the weight swings back and forward a few times, start the measurement operation
on the EA-200.
uMove the optical probe from position A to position B or C, and then repeat the measure-
ment operation.
uDetermine the period from the graph of measurement results, and compare this with the
calculated value.
1Weight Position of Equilibrium
2Hand
3Amplitude: 3cm
1Weight Position of Equilibrium
2Flashlight
3Weight Movement
4Optical Probe
5Distance Between A and B: 1cm
6Distance Between A and C: 3cm
m“E-CON”w1(SETUP)b(Wizard)w
1(CASIO)d(Light) 0.01w255w1(YES)

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쐽Equipment
Two carts of identical mass String Pulley with a bracket to secure it
Velcro쑓500g weight Cushion
Distance Measurement Setup (EA-200, graphic scientific calculator, data communication
cable, optional EA-2*1)
쐽Preparing the Carts
uMeasure the masses of Cart 1 and Cart 2.
uAffix Velcro쑓to the impact surfaces of Cart 1 and Cart 2.
uUse tape to securely affix the string to the center of the front end (the same end where
the Velcro쑓is affixed) of Cart 1.
쐽Setting Up
uAlign the EA-2, Cart 1, Cart 2 and the pulley in a straight line.
uRun the string under Cart 2 and place it onto the pulley. Attach the weight to the end of
the string.
uSupport the weight with your hand so it does not pull Cart 1.
2-3-1
The purpose of this activity is to investigate the law of conservation of momentum through
the collision of two carts.
Collisions can take on many different forms, and can involve automobiles, locomotives,
shopping carts, or even two people. The force of the impact when the two objects collide
depends not only on their velocities but also their respective masses (weight), and you can
calculate the momentum of an object by multiplying its mass by its velocity.
Despite the variables involved, one principle always holds true – if external forces such as
friction are ignored, the sum of the momenta of two objects prior to collision is the same as
the sum of the momenta of the objects after collision. This is the principle known as the
“conservation of momentum.” This principle is an excellent tool for understanding the
dynamics of collisions.
The following expresses conservation of momentum in the case of a stationary cart being
struck by another cart, after which the two carts adhere to each other and continue in
motion together.
m1v1= (m1+ m2)v2
m1(kg) : Mass of Cart 1
m2(kg) : Mass of Cart 2
v1(m/s) : Velocity of Cart 1 Before Collision
v2(m/s) : Velocity of Two Carts After Collision
This means that when the two carts are of identical mass, the combined velocity of the two
carts after collision is one half that of the velocity of Cart 1 before the collision.
Conservation of Momentum
Theory
The above expression can be used to obtain the post-collision velocity of two carts (while they
adhere to each other) of different masses.
1Back of Cart 1
2String
3Velcro쑓
1Cart 1
2Cart 2
3Pulley
4500g weight
5String
6Cushions
7EA-2 (SONIC)
8Allow 60cm
between EA-2
and Cart 1.
Activity: SetupActivity: Setup
9Distance: 50cm
0Height of weight
from floor: 30cm
!Desk
@Floor
#Velcro쑓
$EA-200
*1When using the EA-200 in combination with the optional ‘‘Motion Sensor (EA-2) ”, be sure to
power the EA-200 using its bundled AC adaptor (AD-A60024).
*1

20020601
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쐽Calculator Operation
uFind the applicable program in the Program Library (P.2-16-1), input it into your calculator,
and then run it.
uDisplay graphs for the distance traveled, velocity, and acceleration of Cart 1.
L(m) :Cart 1 Distance Traveled
v(m/s) :Cart 1 Velocity
a(m/s2):Cart 1 Acceleration
t(s) :Time
2-3-2
쐽Measuring Data
uPrepare the Distance Measurement Setup. Immediately after starting the measurement
operation, allow the weight to drop.
uBe ready to catch the carts with your hands if the cushion does not stop them.
uCompare calculated theoretical velocity values with your measured velocity.
1Hand
2500g weight
3Floor
4String
5Pulley
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uThink about why Cart 1 Acceleration never registers a value of zero.
uAdd weight to Cart 1 and Cart 2 to change their masses and find out how this affects
velocity.
uThink about what would happen if we replaced the Velcro쑓with a spring.
Activity: Operating the EquipmentActivity: Operating the Equipment MeasurementMeasurement

20020601
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Activity: SetupActivity: Setup
2-4-1
쐽Equipment
Syringe (with scale markings) Plastic Container Rubber Tube
Rubber Gasket Clip Mixing Stick
Warm Water, Cold Water, Ice
Temperature Measurement Setup (EA-200, graphic scientific calculator,
data communication cable, temperature probe)
쐽Assembling the Equipment
uCut a hole into the side of the plastic container, and affix the rubber gasket around the
hole on the outside of the container.
uSlip the syringe with the rubber tube on its tip into the hole, and pack it with rubber to
make it watertight.
uAffix the clip to the rubber tube to seal the air inside the syringe.
쐽Setting Up
uFill the plastic container with warm water and wait until the air in the syringe stabilizes.
This activity is designed to confirm Charles’ law through an actual experiment.
Increasing the temperature of a gas causes the molecules that make up the gas move
faster. The pressure within the container that holds the gas is determined by the number of
collisions between the molecules and the walls of the container, and by the velocity of the
molecules when they collide with the walls. If pressure remains constant and temperature
increases, the gas expands, which reduces the number of molecular impacts with the
container walls and negates the increase in molecular velocity.
Charles’ Law states that the thermal expansion of rarified gas of constant pressure is
proportional to the increase in temperature, and is represented by the expression shown
below. If the temperature when the volume of gas reaches zero is defined as absolute zero,
absolute zero is –273°C.
V(m3):Gas Volume
V0(m3):Gas Volume at 0°C
T(°C) : Gas Temperature
Charles’ Law
Theory
V = (T + 273)
V
0
273
1Plastic Container
2Rubber Gasket
3Rubber Tube
4Syringe
5Hole
6Clip
1Plastic Container
2Warm Water: 60°C
3Mixing Stick
4Temperature Probe
(CH1)
5EA-200
1Absolute Zero