Before Assuming Malfunction Of The Calculator; Replacing The Battery - Casio fx-82CW User Manual

Circular ERROR (f(x) and g(x) feature only)
Cause:
• Circular reference is occurring in a registered composite function
("Registering a Composite Function" (page
Action:
• Do not have g(x) input into f(x), and f(x) input into g(x) at the same
time.
Not Defined (f(x) and g(x) feature only)
Cause:
• You attempted to calculate f(x) or g(x) with f(x)/g(x) undefined.
Action:
• Define f(x) or g(x) before calculating f(x)/g(x).
Before Assuming Malfunction of the
Calculator...
Note that you should make separate copies of important data before
performing these steps.
1. Check the calculation expression to make sure that it does not contain
any errors.
2. Make sure that you are using the correct calculator app for the type of
calculation you are trying to perform.
• To check which calculator app you are currently using, press
highlights the icon of the calculator app currently in use.
3. If the above steps do not correct your problem, press the
• This causes the calculator to perform a routine that checks whether
calculation functions are operating correctly. If the calculator discovers
any abnormality, it automatically initializes the calculator app and
clears memory contents.
4. Return the calculator settings (except for Contrast and Auto Power Off)
to their initial default settings by performing the procedure below.
(1) Press , select a calculator app icon, and then press
(2) Press , and then select [Reset] > [Settings & Data] > [Yes].

Replacing the Battery

If the screen shown below appears right after you turn on power, it means
that remaining battery power is low.
52)).
86
. This
key.
.