18
Section 1
Getting Started
Power On and Off
The = key turns the HP 15c on and off.
*
To conserve power, the
calculator automatically turns itself off after a few minutes of inactivity.
Keyboard Operation
Primary and Alternate Functions
Most keys on your HP 15c perform one primary and two alternate, shifted
functions. The primary function of any key is indicated by the character(s)
on the face of the key. The alternate functions are indicated by the gold
characters printed above the key and the blue characters printed on the
lower face of the key.
To select the primary function
printed on the face of a key, press
only that key. For example: ÷.
To select the alternate function
printed in gold or blue, press the
like-colored prefix key (´ or |)
followed by the function key. For
example: ´ _; | £.
Throughout this handbook, we will observe certain conventions in
referring to alternate functions. References to the function itself will
appear as just the key name in a box, such as “the W function”.
References to the use of the key will include the prefix key, such as “press
| W”. References to the four gold functions printed under the
bracket labeled “CLEAR” will be preceded by the word “CLEAR”, such
as “the CLEAR Q function”, or “press ´ CLEAR M”.
*
Note that the = key is lower than the other keys to help prevent its being pressed
inadvertently.
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