Manual

User's Guide — 121
• The Handheld Models —
− Construction Master Pro LT (#4030)
− Construction Master Pro (#4060)
− Construction Master Pro Trig Plus III (#4075)
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 Key
If your calculator should ever “lock up,” press Reset—a small hole lo-
cated to the left (or right for the Construction Master Pro Desktop or
Desktop Printer) of the [Off] key—to perform a total reset.