Texas Instruments TI-89 Guide Book

2 Chapter 1: Getting Started
01START.DOC TI-89/TI-92Plus:Getting Started (English) Bob Fedorisko Revised: 02/23/01 10:47 AM Printed: 02/23/01 2:10 PM Page 2 of 12
01START DOC TI
-
89/TI
-
92Plus:Getting Started (English) Bob Fedorisko Revised: 02/23/01 10:47 AM Printed: 02/23/01 2:10 PM Page 2 of 12
To install the four AAA batteries:
1. Place the
TI
-
89
face down on a soft cloth to prevent scratching
the display face.
2. On the back of the calculator, depress the battery cover latch. Lift
and remove the battery cover.
3. Remove the batteries from the package and install them in the
battery compartment. Arrange the batteries according to the
polarity (+ and
N
) diagram in the battery compartment.
4. Replace the battery cover by inserting the two prongs into the
two slots at the bottom of the battery compartment, and then
push the cover until the latch snaps closed.
To replace the batteries without losing any information stored in
memory, follow the directions in Appendix C.
Getting the TI-89 Ready to Use
The TI
-
89 comes with four AAA batteries. This chapter
describes how to install these batteries. It also describes how
to turn the unit on for the first time, set the display contrast,
select a language, and view the Home screen for both the
TI
-
89 and the TI
-
92 Plus.
Installing the AAA
Batteries
Important: When replacing
batteries in the future,
ensure that the
TI
-
89
is
turned off by pressing
2®
.
Lithium battery
AAA batteries

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA