U ser 's GUide — 63Auto-Range — If an “overflow” is created because of aninput and calculation with small units that are out of thestandard eight-digit range of the display, the answer will beautomatically expressed in the next larger units (instead ofshowing “OfLO”) — e.g., 200,000,000 mm is shown as200,000 m. Also applies to inches and feet.auTO SHuT-OFFYour calculator is designed to shut itself off after about 8-12minutes of non-use.BaTTErIESThe Machinist Calc Pro uses two LR-44 batteries. Shouldyour calculator display become very dim or erratic, replace thebatteries.Note: Please use caution when disposing of your old batteries, asthey contain hazardous chemicals.Replacement batteries are available at most discount orelectronics stores. You may also call Calculated Industries at1-775-885-4900.battery Replacement InstructionsTo replace the batteries, slide open the battery door (at topbackside of unit) and replace with new batteries. Make surethe batteries are facing positive side up.rESETIf your calculator should ever “lock up,” press Reset – a smallhole located above the C key – to perform a total reset.