Texas Instruments TI-89 Titanium User Manual page 277

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