Extreme cold IE-H.GW 32 or 0 C)r heat (¡above !M f or 40'C) and humidity may alBO affect the functions o1 the calculator Never use volatile fluid such as lacquer ffiinner. benzine, etc. when cleaning ihe unit FOR servicing, contact your reiaiier o< nearby dealer. Before starting calculation, be sure to press the IonTcI key and to confirm that '0' Is shown In the display. Special care should be taken not to damage the unit by bending or dropping. For example, do not carry It In your hip pocke