Replacing The Batteries; Reset - Calculated Industries 4020 Pocket Reference Manual

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.
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OCKET EFERENCE UIDE