fx-82MS fx-82TL fx-9860GII TI-83
AC/ON
On a Casio calculator you can clear all data on the display
AC/ON
and the keyboard is unlocked. This key is also used to turn power on or stop execution of an operation.
Error messages
The keyboard is locked while an error message is on the display. Press AC/ON or EXIT to clear the error. With left ◁ or right ▷ you can move the cursor over the calculation and correct the problem. Pressing AC/ON does not clear replay memory, so you can recall the last calculation.
Exemple 1
To enter 1 ÷ 0
Ma ERROR Press:[EXIT] 1 ÷ 0 EXE AC/ON 1÷0
Dividing by zero always produces a message.
Exemple 2
To enter 00
Ma ERROR Press:[EXIT] 0 ∧ 0 EXE AC/ON 00
although it is determined by definition that 00 ≝ 1. Take that as a warning.
Exemple 3
To enter 2 (−) 1
Syntax ERROR Press:[EXIT] 2 (–) 1 EXE AC/ON 2 - 1
A minus sign cannot be used to subtract.
Example 4
To interrupt calculation of a linear differential or quadratic differential or an integral (while the cursor is not shown on the display), press AC/ON .
Example 5
To interrupt operation while a Dynamic Graph draw is being performed, press AC/ON . The speed control screen will then be shown.
Speed Control
Dynamic Speed : ▷
F1:Stop&Go ∥▷
F2:Slow >
F3:Normal ▷
F4:Fast >>
Press F5 to save the data in Dynamic Graph memory. In response to the confimation dialog that appears, press F1 to save the data.
Auto power off
Calculator power automatically turns off if you do not perform any operation for about six minutes. When this happens, press AC/ON to turn power back on.