Replacing The Battery; Auto Power Off - Casio fx-500ES User Manual

Reference
k Power Requirements and Battery
Replacement
This calculator is powered by a single AAA-size battery (R03 (UM-
4)).

Replacing the Battery

Dim figures on the display of the calculator indicate that battery power
is low. Continued use of the calculator when the battery is low can
result in improper operation. Replace the battery as soon as possible
when display figures becomes dim.
Even if the calculator is operating normally, replace the battery at
least once every two years.
Important!
• Removing the battery from the calculator causes independent
memory contents and values assigned to variables to be cleared.
1 Press 1A(OFF) to turn off the
calculator.
2 On the back of the calculator, remove
the screws and the back cover.
3 Remove the old battery.
4 Load a new battery into the calculator
with its positive
ends facing correctly.
5 Replace the back cover and secure it
in place with its screws.
6 Perform the following key operation:
O19(CLR)3(All)=(Yes).
• Make sure you perform the above key operation. Do not skip it.

Auto Power Off

Your calculator will turn off automatically if you do not perform any
operation for about six minutes. If this happens, press the O key to
turn the calculator back on.
k
and negative
E-51
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