Canon F-10 - 3. Precautions in Operation; Key Operation and Handling Precautions

3. Precautions in Operation
Depressing of Keys
Depress the keys accurately. I f two keys are de-
pressed simultaneously, the overflow lamp lights.
Key 0 peration
For right hand operation, place the ind ex finger on
the
key 0 , the middle finger on the key ~ and
the th ird finger on the key 0 . Make a habit of
keeping your fingers in these position s. Thus, depress
the left column keys C2J 0 ~ with the index
finger, the middle column keys 0 ~ 0 with the
middle finger, and the right column keys 13' 0
o with the third finger. With practice, blind
operation will soon become possible.
Notes:
1) Always depress the ~ key after randam opera-
ti on.
2) Remove the cover during operation, and take
care
not to block the ventilation holes at the top
and bottom of the calculator.
3) Do not use the calculator in direct sunlight.
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