Texas Instruments TITANIUM TI-89 - Manual (Page 288)

Constants and Measurement Units 288
If You’re Using the SI or ENG/US System If You’re Using the SI or ENG/US System If You’re Using the SI or ENG/US System If You’re Using the SI or ENG/US System
Setting Custom Defaults Setting Custom Defaults Setting Custom Defaults Setting Custom Defaults
The SI and ENG/US systems of measurement
(set from
Page 3 of the MODE screen) use
built-in default units, which you cannot
change.
The default units for these systems are
available.
To set custom defaults:
1. Press 3 … B
3 to set Unit System =
CUSTOM .
2. Press D to highlight
SET DEFAULTS .
3. Press B to display the
CUSTOM UNIT
DEFAULTS dialog box.
If Unit System=SI or
ENG/US, the Custom
Units item is dimmed.
You cannot set a
default for individual
categories.