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Casio fx-991ZA PLUS II User Manual

Casio fx-991ZA PLUS II
96 pages
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Turning Power On and Off
Press to turn on the calculator.
Press (OFF) to turn off the calculator.
Note
The calculator also will turn off automatically after approximately 10 minutes or
approximately 60 minutes of non-use. Press the key to turn the calculator back
on.
Adjusting Display Contrast
1. Press
(SETUP) ( CONT ).
2. Use and to adjust display contrast.
3. After the setting is the way you want, press .
Important!
If adjusting display contrast does not improve display readability, it probably means
that battery power is low. Replace the battery.
Key Markings
Pressing the
or key followed by a second key performs the
alternate function of the second key. The alternate function is indicated by
the text printed above the key.
(1) Keycap function (2) Alternate function
Characters enclosed in brackets (┌ ┐) that are the same color as i are
used in the CMPLX Mode.
Characters enclosed in brackets (┌ ┐) that are the same color as DEC,
HEX, BIN, and OCT are used in the BASE-N Mode.
6

Table of Contents

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Casio fx-991ZA PLUS II Specifications

General IconGeneral
TypeScientific Calculator
Number of Functions552
Equation SolverYes
Matrix CalculationsYes
Complex Number CalculationsYes
IntegrationYes
DifferentiationYes
Memory9 variables
Weight95 g
Protective CaseYes
DisplayNatural Textbook Display
Power SourceSolar and Battery

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