Auto-Shut Off; Accuracy/Errors - Calculated Industries 4020 Pocket Reference Manual

Auto-Shut Off

Your calculator will shut itself off after
about 8-12 minutes of non-use.

Accuracy/Errors

Accuracy/Display Capacity — Your calcu-
lator has a twelve-digit display made up of
eight digits (normal display) and four frac-
tional digits. You may enter or calculate
values up to 19,999,999.99. Each calcula-
tion is carried out internally to twelve digits.
Errors — When an incorrect entry is
made, or the answer is beyond the range
of the calculator, it will display the word
"ERROR." To clear an error condition you
must hit the o button once. At this
point, you must determine what caused
the error and re-key the problem.
Error Codes:
DISPLAY
OFLO
MATH Error
DIM Error
ENT Error
P
ERROR TYPE
Overflow (too large)
Divide by 0
Dimension error
Entry error
R
OCKET EFERENCE
G — 26
UIDE