Casio FX-9860GIII Installation manual

fx-9860GIII
fx-9750GIII
fx-7400GIII
Hardware
User’s Guide
CASIO Worldwide Education Website
https://edu.casio.com
Manuals are available in multi languages at
https://world.casio.com/manual/calc/
EN

GUIDELINES LAID DOWN BY FCC RULES FOR USE OF THE UNIT IN THE U.S.A. (not appli-
cable 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 CAUTION
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
USB connector* Power Graphic Unit to Windows®compatible PC
Power Graphic Unit to Mac OS PC
* Not included with the calculator, but available as an option.
Declaration of Conformity
Model Number: fx-9860GIII, fx-9750GIII
Trade Name: CASIO COMPUTER CO., LTD.
Responsible party: CASIO AMERICA, 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.
Company and product names used in this manual may be registered trademarks or trademarks
of their respective owners.

i
BEFORE USING THE CALCULATOR
FOR THE FIRST TIME...
Batteries are not loaded in your calculator at the factory.
Be sure to follow the procedure below to load batteries and adjust the display contrast
before trying to use the calculator for the first time.
1. Making sure that you do not accidently press the okey, slide the case onto the
calculator and then turn the calculator over. Remove the battery cover from the
calculator by pulling with your finger at the point marked 1.
1
2. Load the four batteries that come with the calculator.
• Make sure that the positive (+) and negative (–) ends of the
batteries are facing correctly.
3. Replace the battery cover, making sure that its tabs enter the
holes marked 2and turn the calculator front side up. The
calculator will turn on automatically and the MAIN MENU will
appear on the display.
2

ii
• If the Main Menu shown to the right is not on the
display, press the RESTART button on the back
of the calculator.
RESTART button The above screen shows
the fx-9860GIII. The
appearance of the screens
of other models may be
slightly different.
4. Use the cursor keys (f, c, d, e) to select the SYSTEM icon and press w,
then press 1( ) to display the contrast adjustment screen.
5. Adjust the contrast.
• The ecursor key makes display contrast darker.
• The dcursor key makes display contrast lighter.
• 1(INIT) returns display contrast to its initial default.
6. To exit display contrast adjustment, press m.

EN-1
Precautions when Using this Product
A progress bar and/or a busy indicator appear on the display whenever the calculator is performing
a calculation, writing to memory, or reading from memory.
Busy indicator
Progress bar
Never press the RESTART button or remove the batteries from the calculator when the progress
bar or busy indicator is on the display. Doing so can cause memory contents to be lost and can
cause malfunction of the calculator.
fx-9860GIII, fx-9750GIII users...
The calculator is equipped with flash memory for data storage. It is recommended that you always
backup your data to flash memory. For details about the backup procedure, see “Using the Memory
Manager” in the separate Software User’s Guide.
You can also transfer backup files to a computer by establishing a USB connection between
the calculator and a computer. For information about transferring files from a computer to the
calculator, see “Chapter 13 Data Communication” in the separate Software User’s Guide.

EN-2
Handling Precautions
• Your calculator is made up of precision components. Never try to take it apart.
• Avoid dropping your calculator and subjecting it to strong impact.
• Do not store the calculator or leave it in areas exposed to high temperatures or humidity, or large
amounts of dust. When exposed to low temperatures, the calculator may require more time to
display results and may even fail to operate. Correct operation will resume once the calculator is
brought back to normal temperature.
• The display will go blank and keys will not operate during calculations. When you are operating
the keyboard, be sure to watch the display to make sure that all your key operations are being
performed correctly.
• Replace the main batteries once every one year regardless of how much the calculator is used
during that period. Never leave dead batteries in the battery compartment. They can leak and
damage the unit.
• Do not use a nickel-based primary battery with this product. Incompatibility between such
batteries and product specifications can result in shorter battery life and product malfunction.
• Keep batteries out of the reach of small children. If swallowed, consult 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 moistened with a solution of water and a neutral detergent and
wrung out.
• Always be gentle when wiping dust off the display to avoid scratching it.
• 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. It is up to you to
prepare physical records of data to protect against such data loss.
• Never dispose of batteries, the liquid crystal panel, or other components by burning them.
• Be sure that the power switch is set to OFF when replacing batteries.
• If the calculator is exposed to a strong electrostatic charge, its memory contents may be
damaged or the keys may stop working. In such a case, perform the Reset operation to clear the
memory and restore normal key operation.
• If the calculator stops operating correctly for some reason, use a thin, pointed object to press the
RESTART button on the back of the calculator. Note, however, that this clears all the data in
calculator memory.
• Note that strong vibration or impact during program execution can cause execution to stop or can
damage the calculator’s memory contents.
• Using the calculator near a television or radio can cause interference with TV or radio reception.
• Before assuming malfunction of the unit, 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.

EN-3
• The contents of this User’s Guide are subject to change without notice.
• No part of this User’s Guide may be reproduced in any form without the express written
consent of the manufacturer.
• Be sure to keep all user documentation handy for future reference.
Be sure to keep physical records of all important data!
The large memory capacity of the unit makes it possible to store large amounts of data.
You should note, however, that low battery power or incorrect replacement of the batteries that
power the unit can cause the data stored in memory to be corrupted or even lost entirely. Stored
data can also be affected by strong electrostatic charge or strong impact. It is up to you to keep
back up copies of data to protect against its loss.
Since this calculator employs unused memory as a work area when performing its internal
calculations, an error may occur when there is not enough memory available to perform
calculations. To avoid such problems, it is a good idea to leave 1 or 2 kbytes of memory free
(unused) at all times.
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.

EN-4
Contents
1. Key Layout
2. Specifications
3. Restart and Reset
4. Power Supply

EN-5
1. Key Layout
fx-9860GIII / fx-9750GIII fx-7400GIII

EN-6
2. Specifications
Variables: 28
Calculation range:
± 1 × 10
–99
to ±9.999999999 × 10
99
and 0. Internal operations use 15-digit mantissa.
Exponential display range: Norm 1: 10
–2
> |x|, |x| >10
10
Norm 2: 10
–9
> |x|, |x| >10
10
Program capacity: fx-9860GIII, fx-9750GIII: 62,000 bytes (max.)
fx-7400GIII: 20,000 bytes (max.)
Storage memory capacity:
fx-9860GIII, fx-9750GIII: 3MB (max.)
fx-7400GIII: None
Power supply: Four AAA-size batteries (LR03 (AM4))
Power consumption: 0.35 W
Approximate battery life
300 hours (continuous display of main menu)
230 hours continuous operation (5 minutes calculation, 55 minutes display)
1 year (unused with power off)
• Any of the following can shorten battery life.
- Sequential program calculation execution
-
Manufacturer and type of battery used, differences between individual batteries
- Operating conditions (applications used)
- Examination Mode operation
Auto power off:
Power is automatically turned off approximately 10 minutes or approximately 60 minutes after
last operation.
Ambient temperature range: 0°C to 40°C (32°F to 104°F)
Dimensions: 18.7 mm (H) ×83.5 mm (W) ×175.5 mm (D)
3/4" (H) ×3 1/4" (W) ×6 7/8" (D)
Approximate weight: 190 g (6.7 oz) (including batteries)
Data Communications
3-pin serial port
Method: Start-stop (asynchronous), half-duplex
Transmission speed (BPS):
115200 bits/second (normal)
38400 bits/second (Send38k/Receive38k commands)

EN-7
<115200 bits/second>
Parity: EVEN
Bit length: 8 bits
Stop bit:
Send: 1 bit
Receive: 1 bit
Includes parity (None) 1-bit
X ON/X OFF Control: None
<38400 bits/second>
Parity: None
Bit length: 8 bits
Stop bit:
Send: 3 bits
Receive: 2 bits
Includes parity (None) 1-bit
X ON/X OFF Control: None
USB port (All models except fx-7400GIII)
In accordance with USB 2.0 standards

EN-8
3. Restart and Reset
uRestart
Should the calculator start to act abnormally, you can restart it by pressing the RESTART
button. Note, however, that you should only use the RESTART button only as a last resort.
Normally, pressing the RESTART button reboots the calculator’s operating system, so
programs, graph functions and other data in calculator memory is retained.
RESTART button
Important!
The calculator backs up user data (main memory) when you turn power off and loads the
backed up data when you turn power back on.
When you press the RESTART button, the calculator restarts and loads backed up data.
This means that if you press the RESTART button after you edit a program, graph function,
or other data, any data that has not been backed up will be lost.
uReset
Use reset when you want to delete all data currently in calculator memory and return all
mode settings to their initial defaults.
Before performing the reset operation, first make a written copy of all important data.
For details, see “Reset” in the separate Software User’s Guide.
4. Power Supply
This calculator is powered by four AAA-size (LR03 (AM4)) batteries.
An icon in the upper right corner of the Main Menu screen indicates the current battery level.
Level 3
Level 2
Level 1
Dead
Replace batteries as soon as possible whenever (Level 1) is indicated.

EN-9
If the following message appears on the display, immediately turn off the calculator and
replace the batteries as instructed.
If you try to continue using the calculator, it will automatically turn off in order to protect
memory contents. You will not be able to turn power back on until you replace batteries.
Be sure to replace the batteries at least once every one year, no matter how much you use the
calculator during that time.
The batteries that come with this calculator discharge slightly during shipment and storage.
Because of this, they may require replacement sooner than the normal expected battery life.
kReplacing Batteries
Precautions:
Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of
the calculator. Note the following precautions:
• Be sure that the positive (+) and negative (–) poles of each battery are facing in the proper
directions.
• Never mix batteries of different types.
• Never mix old batteries and new ones.
• Never leave dead batteries in the battery
compartment.
• Remove the batteries if you do not plan to
use the calculator for long periods.
• Never try to recharge the batteries supplied
with the calculator.
• Do not expose batteries to direct heat, let them
become shorted, or try to take them apart.
(Should a battery leak, clean out the battery compartment of the calculator immediately, taking
care to avoid letting the battery fluid come into direct contact with your skin.)
Keep batteries out of the reach of small children. If swallowed, consult with a physician
immediately.
uTo replace the batteries
• Never turn on the calculator while the batteries are removed or not loaded correctly. Doing
so can cause memory data to be deleted and malfunction of the calculator. If mishandling
of batteries causes such problems, correctly load batteries and then perform the restart
operation to resume normal operation.
• Be sure to replace all four batteries with new ones.

EN-10
fx-9860GIII, fx-9750GIII:
Turning off the calculator while editing an eActivity and then changing batteries can cause
the data you are editing to be deleted. Be sure to save the eActivity data before turning off
the calculator and changing batteries.
1. Press !o(OFF) to turn off the calculator.
Warning!
• Be sure to turn the calculator off before replacing batteries. Replacing batteries with power
on will cause data in memory to be deleted.
2. Making sure that you do not accidently press the okey, slide the case onto the calculator
and then turn it over.
3. Remove the battery cover from the calculator by pulling with your
finger at the point marked 1.
4. Remove the four old batteries.
5. Load a new set of four batteries, making sure that their positive (+)
and negative (–) ends are facing in the proper directions.
6. Replace the battery cover.
1
7. Turn the calculator front side up and slide off its case. Next, press
oto turn on power.
• If the figures on the display appear too light and hard to see after you turn on power, adjust
the contrast.
kAbout the Auto Power Off Function
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 approximately 10 minutes or
approximately 60 minutes as the trigger time (see “Power Properties Settings” in the separate
Software User’s Guide). To restore power, press o.

Canadian Regulatory Information
Information concernant la Réglementation Canadienne
This Class B digital apparatus complies with Canadian
ICES-003.
Cet appareil numérique de la classe B est conforme à la
norme NMB-003 du Canada.
Manufacturer:
CASIO COMPUTER CO., LTD.
6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
Responsible within the European Union:
Casio Europe GmbH
Casio-Platz 1, 22848 Norderstedt, Germany
www.casio-europe.com

CASIO COMPUTER CO., LTD.
6-2, Hon-machi 1-chome
Shibuya-ku, Tokyo 151-8543, Japan
One or more of the following patents may be used in the product.
U.S.Pats. 7,927,221 8,214,413
SA2001-A
© 2020 CASIO COMPUTER CO., LTD.