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E-2
• The displays and illustrations (such as key markings)
shown in this User’s Guide are for illustrative pur-
poses only, and may differ somewhat from the ac-
tual items they represent.
• The contents of this manual are subject to change
without notice.
• In no event shall CASIO Computer Co., Ltd. be li-
able to anyone for special, collateral, incidental, or
consequential damages in connection with or aris-
ing 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 P button on the back of the cal-
culator (step 6 on page 35 or 36) before using it for
the first time (
fx-570W/
fx-100W
).
• Be sure to press the 5 key before using the calcula-
tor for the first time (
fx-991W/
fx-115W
).
• Even if the calculator is operating normally, replace
the battery at least once every three years for the
fx-570W/
fx-991W/
fx-115W, or at least once every
two years for the fx-100W.
Dead battery can leak, causing damage to and malfunc-
tion of the calculator. Never leave the dead battery in the
calculator.
• The battery that comes with the calculator when you
purchase it is for testing only. It may not provide
full service life.
• Low battery power can cause memory contents to
become corrupted or lost completely. Always keep
written records of all important data.