Texas Instruments TI-89 用户手册
Operating the Calculator
146
Turning the Calculator Off
Turning the Calculator Off
Turning the Calculator Off
Turning the Calculator Off
You can use either of the following keys to turn off your graphing calculator.
Note:
® is the second function of the ´ key.
APD (Automatic Power Down)
APD (Automatic Power Down)
APD (Automatic Power Down)
APD (Automatic Power Down)
After several minutes without any activity, the calculator turns itself off automatically. This
feature is called APD.
feature is called APD.
When you press
´, the calculator will be exactly as you left it.
•
The display, cursor, and any error conditions are exactly as you left them.
•
All settings and memory contents are retained.
Press:
Description
2 ®
(press
2
and
then press
®
)
Settings and memory contents are retained by the
Constant Memory™ feature. However:
Constant Memory™ feature. However:
•
You cannot use
2 ®
if an error message is
displayed.
•
When you turn the calculator on again, it displays
either the Home screen or the Apps desktop
(regardless of the last application you used).
either the Home screen or the Apps desktop
(regardless of the last application you used).
8 ®
(press
8
and then
press
®
)
Similar to
2 ®
except:
•
You can use
8 ®
if an error message is
displayed.
•
When you turn the calculator on again, it will be
exactly as you left it.
exactly as you left it.