Turning The Ti.89 / Ti.92 Plus On And Off - Texas Instruments TI-89 Manual Book

Turning the TI-89 / TI-92 Plus On and Off
Turning the
TI-89 / TI-92 Plus
On
Turning the
TI-89 / TI-92 Plus Off
Note: ® is the second
function of the ´ key.
APD (Automatic
Power Down)
Batteries
14 Chapter 2: Operating the Calculator
You can turn the
TI-89 / TI-92 Plus
the ´ and 2 ® (or ¥ ® ) keys. To prolong battery life,
the APDé (Automatic Power Downé) feature lets the
turn itself off automatically.
TI-89 / TI-92 Plus
Press ´.
¦
If you turned the unit off by pressing 2 ®, the
returns to the Home screen.
¦
If you turned the unit off by pressing ¥ ® or if the unit turned
itself off through APD, the
application you used last.
You can use either of the following keys to turn off the
Press: Description
2 ®
Settings and memory contents are retained by the
(press 2
Constant Memoryé feature. However:
and then
¦
You cannot use 2 ® if an error message is
press ® )
displayed.
¦
When you turn the
always displays the Home screen (regardless of
the last application you used).
¥ ® Similar to 2 ® except:
(press ¥
¦
You can use ¥ ® if an error message is
and then
displayed.
press ® )
¦
When you turn the
will be exactly as you left it.
After several minutes without any activity, the
itself off automatically. This feature is called APD.
When you press ´, the
¦
The display, cursor, and any error conditions are exactly as you
left them.
¦
All settings and memory contents are retained.
APD does not occur if a calculation or program is in progress, unless
the program is paused.
The uses four AAA alkaline batteries and a back-up lithium
TI-89
battery. The
TI-92 Plus
back-up lithium battery. To replace the batteries in either calculator
without losing any information stored in memory, follow the
directions in Appendix C.
on and off manually by using
TI-89 / TI-92 Plus
TI-89 / TI-92 Plus
TI-89 / TI-92 Plus
will be exactly as you left it.
TI-89 / TI-92 Plus
uses four AA alkaline batteries and also has a
TI-89 / TI-92 Plus
returns to whichever
TI-89 / TI-92 Plus
on again, it
on again, it
turns
TI-89 / TI-92 Plus
.