In the vicinity of a function’s singular point and point of inflection, errors are cumulative and may become large.

Power Supply

The TWO WAY POWER system actually has two power supplies: a solar cell and a G13 Type (LR44) button battery. Normally, calculators equipped with a solar cell alone can operate only when relatively bright light is present. The TWO WAY POWER system, however, lets you continue to use the calculator as long as there is enough light to read the display.

• Replacing the Battery

Either of the following symptoms indicates battery power is low, and that the battery should be replaced.

•Display figures are dim and difficult to read in areas where there is little light available.

•Nothing appears on the display when you press the 5 key.u To replace the battery1Remove the screw that holds
the battery cover in place and

Screw

 

then remove the battery

 

cover.

 

2 Remove the old battery.

 

3 Wipe off the sides of new

 

battery with a dry, soft cloth.

 

Load it into the unit with the

 

positive k side facing up (so

 

you can see it).

 

4Replace the battery cover and secure it in place with the screw.5Press 5to turn power on. Be sure not to skip this step.
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