Casio FX-991ES Support Question
Casio FX-991ES Support Question
Find answers below for this question about Casio FX-991ES.Need a Casio FX-991ES manual? We have 2 online manuals for this item!
Question posted by Anonymous-127060 on December 20th, 2013
Fx 991 Es Plus
my fx 991 ES plus calculator does not show result and becomes off for few seconds what can I do??
Current Answers
Related Casio FX-991ES Manual Pages
User Guide - Page 4
... User's Guide. Example: 1(Setup)
Indicates the menu item that this operation also clears all data currently in calculator memory.
19(CLR)3(All)=(Yes)
• For information about calculation modes and setup settings, see "Calculation Modes and Calculator Setup".
• For information about memory, see the symbol Appendix in this manual, it . shall not be...
User Guide - Page 5
... calculator in
this manual. Doing so can cause certain components to leak and damage nearby items, and can create the risk of fire and personal injury.
• Always make sure that can result ...you load it to suddenly burst, creating the risk of fire and personal injury. Keep this calculator. Safety Precautions
Be sure to read the following safety precautions before using a battery can cause...
User Guide - Page 6
... exposed to very high temperatures. Never use thinner, benzene or other tight-fitting clothing where it to strong impact.
• Never twist or bend the calculator. Never leave a dead battery in a weak solution of humidity or dust. Heat can leak, causing damage to and malfunction of battery life. Doing so can...
User Guide - Page 7
... display contrast.
Important!
• If adjusting display contrast does not improve display readability, it , and then affix the hard case to the back of the calculator as shown in the illustration below. E-5 Replace the battery.
k Turning Power On and Off
• Press O to turn off the...
User Guide - Page 8
... significant digits is more data above/below the current screen. The alpha input mode will be replayed, or there is in effect. Example:
Input expression
{ Calculation result
k Display Indicators
Sample Display:
CMPLX
This indicator:
S
A
M
STO
RCL
STAT CMPLX
MAT VCT
7 8 9 FIX SCI Math
$`
Disp
Means this:
The keypad has been shifted by...
User Guide - Page 9
...which you can jump between using c and f.
c
f
E-7
Select this type of operation: General calculations Complex number calculations Statistical and regression calculations Calculations involving specific number systems (binary, octal, decimal, hexadecimal) Equation solution Matrix calculations Generation of calculation that corresponds to the mode you want to perform this mode:
COMP CMPLX...
User Guide - Page 10
... off to the specified digit before being displayed.
Calculation results are written on paper.
• Linear format causes ...(Fix2)
• Sci: The value you specify (from 1 to 9) controls the number of significant digits for displayed calculation results. Specifying the Input/Output Format
For this input/output format: Math Linear
Perform this key operation: 1N6(Fix)0-9 1N7(Sci)0-9...
User Guide - Page 11
only. The decimal point for input values is applied for calculation results
. Norm1: 10-2 > x, x > 1010 Norm2: 10-9 > x, x...: Selecting one of the STAT Mode STAT editor screen on or off. Outside the specified range, results are displayed using exponential format. To specify this: Show FREQ Column Hide FREQ Column
Perform this key...
User Guide - Page 12
...-1(, tanh-1(, log(, ln(, e^(, 10^(, '(, 3'(, Abs(, Pol(, Rec(, ∫(, d/dx(, Σ(, P(, Q(, R(, arg(, Conjg(, Not(, Neg(, det(, Trn(, Rnd(
E-10 k Initializing the Calculation Mode and Other Settings
Performing the following procedure initializes the calculation mode and other setup settings as they are written.Then simply press the = key to execute it is automatically input...
User Guide - Page 13
... expression: 1111 + 2222 + 3333 + 444
Math
Displayed portion:
Cursor
• When the ] indicator is displayed, you want to use the e key to the right of a calculation, immediately before the = key is pressed. Number of Input Characters (Bytes) • You can show up to 14 characters at the end of the expression...
User Guide - Page 14
...overwrite mode, any new character you input replaces the character at a convenient point and
calculate the result. You can switch to the overwrite mode by pressing 1Y(INS). • With... when the overwrite mode is selected. • The initial default for more information. • The calculator automatically changes to the insert mode whenever you change to the overwrite mode when you need it.
...
User Guide - Page 15
... × 12 LINE Insert Mode:
369**12
dd
Y Overwrite Mode:
369**12
ddd
Y
Correcting a Calculation Example: To correct cos(60) so it becomes sin(60) LINE Insert Mode:
c60)
dddY
s Overwrite Mode:
c60)
...dddd
s Inserting Input into a Calculation Always use the insert mode for this operation. E-13 Use d or e to move the cursor to the...
User Guide - Page 16
... ÷ 0 × 2 = by pressing A, which clears the calculation.
If this happens, divide the calculation into multiple parts and calculate each part separately. You can input and display fractions and some functions using...
14/0*2=
Press e or d. This will become impossible if the height of the calculation you nest too many functions and/or parentheses. d1
=
You can also exit the...
User Guide - Page 17
... Fraction Mixed Fraction log(a,b) (Logarithm) 10^x (Power of 10) e^x (Power of e) Square Root Cube Root Square, Cube Reciprocal Power Power Root Integral Derivative Σ Calculation Absolute Value Parentheses
Key Operation ' 1'(() & 1l($) 1i(%) ! 1!(#) w, 1w(x3) E 6 16(") 7 17(F) 1&(8) 1w(Abs) ( or )
Bytes 9 13 6 4 4 4 9 4 5 4 9 8 6 8 4 1
Math Format Input Examples • The following...
User Guide - Page 18
...
Fraction
'
log(a,b) Power Root
& 16(")
E-16 Example 3: To input (1 + 2 )2 × 2 =
5
MATH
Math
(1+'2c5e)
w*2=
• When you press = and obtain a calculation result using Math format, you need to here.
This incorporates the expression in the above procedure, and the required key operations to use them.
Example: To ...
User Guide - Page 19
... should be displayed in a form that includes expressions like '2 and π (irrational number form). • Pressing = after inputting a calculation displays the result using
irrational number form. • Pressing 1= after inputting a calculation displays the result
using decimal values (no irrational number form) regardless of whether you can also incorporate values into the following...
User Guide - Page 20
... Value Input
Units of 15°
Multiples
of
1 12
π
radians
50 Multiples of grads
3
Input Value Range for ' Form
Calculation Result ȊxȊ < 9 × 109
ȊxȊ < 20π
ȊxȊ < 10000
Calculation results may be
displayed. Example 2: sin (60) = '3 2
MATH s60=
(Angle Unit: Deg)
Math
Example 3: sin-1 (0.5) = 1 π 6
MATH 1s(sin-1)0.5=
(Angle...
User Guide - Page 21
... form
'2 + '3 + '8 = '3 + 3'2 '2 + '3 + '6 = 5.595754113
' form decimal form
The underlined areas in the above examples indicate what caused decimal form to a common denominator.
Reasons why the results of coefficients (a, c, and d). More than two terms in the calculation result
• Calculation results displayed in ' form are displayed in decimal form even when any intermediate...
User Guide - Page 22
... (Norm1)
FIX
3 decimal places (Fix3)
SCI
3 significant digits (Sci3) • For more information, see "Specifying the Number of decimal places and significant digits for the calculation result. E-20
• If a term is encountered during the calculation cannot be displayed as a root (') form or a fraction, the calculation result is displayed in the COMP Mode (N1).
User Guide - Page 23
... initial default settings, fractions are displayed as improper fractions.
• Fraction calculation results are always reduced before being displayed. Switching between Improper Fraction and Mixed
Fraction...than 10, the value is automatically displayed in decimal format.
• The result of a calculation. This is currently selected.
Omitting a Final Closed Parenthesis You can omit any ...
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