Casio NP20 User Manual

Also see for ALGEBRA FX 2.0: Software guide Manual Manual Manual Using

Contents

19990401Handling Precautions• Your calculator is made up of precision components. Never try to take it apart.• Avoid dropping your calculator and subjecting it to strong impact.• Do not store the calculator or leave it in areas exposed to high temperatures or humidity, orlarge amounts of dust. When exposed to low temperatures, the calculator may require more timeto display results and may even fail to operate. Correct operation will resume once the calculatoris brought back to normal temperature.• The display will go blank and keys will not operate during calculations. When you are operatingthe keyboard, be sure to watch the display to make sure that all your key operations are beingperformed correctly.• Replace the main batteries once every 2 years regardless of how much the calculator is usedduring that period. Never leave dead batteries in the battery compartment. They can leak anddamage the unit.• Keep batteries out of the reach of small children. If swallowed, consult a physician immediately.• Avoid using volatile liquids such as thinner or benzine to clean the unit. Wipe it with a soft, drycloth, or with a cloth that has been moistened with a solution of water and a neutral detergentand wrung out.• Always be gentle when wiping dust off the display to avoid scratching it.• In no event will the manufacturer and its suppliers be liable to you or any other person for anydamages, expenses, lost profits, lost savings or any other damages arising out of loss of dataand/or formulas arising out of malfunction, repairs, or battery replacement. It is up to you toprepare physical records of data to protect against such data loss.• Never dispose of batteries, the liquid crystal panel, or other components by burning them.• When the “Low Main Batteries!” message or the “Low Backup battery!” message appears on thedisplay, replace the main power supply batteries or the back up battery as soon as possible.• Be sure that the power switch is set to OFF when replacing batteries.• If the calculator is exposed to a strong electrostatic charge, its memory contents may bedamaged or the keys may stop working. In such a case, perform the Reset operation to clear thememory and restore normal key operation.• If the calculator stops operating correctly for some reason, use a thin, pointed object to pressthe P button on the back of the calculator. Note, however, that this clears all the data incalculator memory.• Note that strong vibration or impact during program execution can cause execution to stop orcan damage the calculator’s memory contents.• Using the calculator near a television or radio can cause interference with TV or radio reception.• Before assuming malfunction of the unit, be sure to carefully reread this user’s guide and ensurethat the problem is not due to insufficient battery power, programming or operational errors.