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fx-95MS
fx-100MS
fx-115MS (fx-912MS)
fx-570MS
fx-991MS
User's Guide
kfx-912MS owners
Please be sure to read the important notice of this manual.

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http://world.casio.com/edu_e/

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

Removing and Replacing
the Calculator’s Cover
• Before starting .....1
Holding the cover as shown in theillustration, slide the
unit out of the cover.
• After you are finished .....2
Holding the cover as shown in the illustration, slide the
unit out of the cover.
• Always slide the keyboard end of the unit into the cover
first. Never slide the display end of the unit into the cover.

.....1

.....2

1

Safety Precautions
Be sure to read the following safety precautions before
using thiscalculator. 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.

Batteries
• 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 smallchildren. If
accidentally swallowed, consult with a physician immediately.
• Never charge batteries, try to take batteries apart, or
allow batteries to become shorted. Never expose
batteries to direct heat or dispose of them by incineration.
• Misuse of batteries can cause them to leak and damage nearby items, and can create the risk of fire and
personal injury.
• Always make sure that thebattery’s positive k and
negative l ends are facing correctly when you load
it into the calculator.
• Remove the battery if you do not plan to use the
calculator for a long time (fx-95MS/100MS/570MS).
• 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 tosuddenly burst,
creating the risk of fire and personal injury.
• The displays and illustrations (such as key markings)
shown in this User’s Guide are for illustrative purposes
2

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 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.

Handling Precautions
• Be sure to press the 5 key before using the calculator for the first time.
• Even if thecalculator is operating normally, replace
the battery at least once every three years for the fx115MS/fx-570MS/fx-991MS, or at least once every two
years for the fx-95MS/fx-100MS.
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 in areas subjected to temperature extremes.
Very low temperatures can cause slow display response,
total failure of the display, and shortening ofbattery 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.
3

• Avoid use and storage in areas subjected to large
amounts of humidity and dust.
Take care never to leave the...