Calculated Industries 4020 User Manual

POCKET REFERENCE GUIDE — 28
Replacing the Batteries
To replace the batteries, slide open the
battery door (at top backside of unit) and
replace with new batteries. Make sure the
batteries are facing positive side up.
Reset
If your calculator should ever “lock up,”
press Reset — a small hole located above
the l key — to perform a total reset.

Calculated Industries 4020 Specifications

General

Brand	Calculated Industries
Model	4020
Category	Calculator
Language	English