Casio fx 991MS Support Question
Casio fx 991MS Support Question
Find answers below for this question about Casio fx 991MS - Scientific Display Calculator.Need a Casio fx 991MS manual? We have 1 online manual for this item!
Question posted by angellamirembe15 on January 24th, 2022
My Casio 991ms Is Locked And Only Displays Syntax Error. How Do I Unlock It?
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Current Answers
Answer #1: Posted by Troubleshooter101 on January 24th, 2022 3:23 PM
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Answer #2: Posted by SonuKumar on January 25th, 2022 9:11 AM
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Related Casio fx 991MS Manual Pages
User Guide - Page 1
E
http://world.casio.com/edu_e/
fx-95MS fx-100MS fx-115MS (fx-912MS) fx-570MS fx-991MS
User's Guide
kfx-912MS owners
Please be sure to read the important notice of this manual.
User Guide - Page 3
Removing and Replacing the Calculator's Cover
• Before starting .....1 Holding the cover as shown in the illustration, slide the unit out of the cover. • After you are finished .....2 ...the illustration, slide the unit out of the cover. • Always slide the keyboard end of the unit into the cover
first. Never slide the display end of the unit into the cover.
.....1
.....2
1
User Guide - Page 4
...swallowed.
• Keep batteries out of the reach of fire and personal injury.
• The displays and illustrations (such as key markings) shown in personal injury or material damage if ignored.
Safety...them by burning it will not get into the calculator. • Remove the battery if you do not plan to use the calculator for a long time (fx-95MS/100MS/570MS). • Use only the ...
User Guide - Page 5
...calculator is operating normally, replace the battery at least once every three years for the fx115MS/fx-570MS/fx-991MS, or at least once every two years for the fx-95MS/fx-100MS. A dead battery can cause slow display response, total failure of the display...the calculator.
• The battery that comes with this manual are subject to change without notice. • In no event shall CASIO Computer...
User Guide - Page 7
... Display Formats 10 kDecimal Point and Separator Symbols 11 k Initializing the Calculator 11
Basic Calculations 11
k Arithmetic Calculations 11 kFraction Operations 12 kPercentage Calculations 14 kDegrees, Minutes, Seconds Calculations 15 kFIX, SCI, RND 15
Memory Calculations 16
kAnswer Memory 16 kConsecutive Calculations 17 kIndependent Memory 17 k Variables 17
Scientific...
User Guide - Page 9
...information about modes and their selection.
A separator symbol is displayed every three digits when the integer part of equations
F F 1 EQN
7 fx-95MS Modes
To perform this type of calculation:
Perform this To enter key operation: this mode:
Basic arithmetic calculations F 1
COMP
Standard deviation
F 2
SD
Regression calculations
F 3
REG
Solution of the mantissa has more than three...
User Guide - Page 10
... does not take up a step, so inputting A D, for example, takes up to input more than twice displays additional setup screens. Example: Equation
Calculations
EQN
Note!
• To return the calculation mode and setup to perform the calculations being described is running low. If you need to enter in order to the initial defaults shown...
User Guide - Page 11
....
• Pressing the e or r key immediately after you finish a calculation displays the editing screen for that calculation.
• Pressing t does not clear replay memory, so you can recall the last calculation even after an error occurs displays the calculation with the cursor positioned at the location where the error occurred.
9 Pressing [ again back steps sequentially (new-to-old...
User Guide - Page 12
... used for integer values with more than 10 digits and decimal values with more than two decimal places. F i x Sc i No r m
1 23
• Press 3.
k Exponential Display Formats
This calculator can select between two formats that determine at what point exponential notation is used for integer values with more than nine decimal places. •...
User Guide - Page 13
... decimal point, comma separator 2(Comma): Comma decimal point, period separator
k Initializing the Calculator
• Perform the following key operation when you want to enter the COMP Mode when you reach the setup screen shown below. Disp
1
• Display the selection screen.
fx-95MS:
1 r
Other Models: 1 r r
• Press the number key (1 or 2) that corresponds...
User Guide - Page 14
...1151;7) ҃ 80 5 - uDecimal ↔ Fraction Conversion
• Use the operation shown below to enclose a negative exponent within parentheses. k Fraction Operations uFraction Calculations
• Values are displayed in decimal format automatically whenever the total number of digits of a fractional value (integer + numerator + denominator + separator marks) exceeds 10.
• Example...
User Guide - Page 16
... is the percentage change when a value is selected. k Percentage Calculations
• Example 1 : To calculate 12% of 1500 (180) 1500 - 12 A v
• Example 2: To calculate what is the percentage
increase in the mark up or discount calculation, you try to input a mixed fraction while the d/c display format is increased from 40 to 48? (15%, 20%) 46...
User Guide - Page 19
...; The result of a calculation can also be input directly into memory, added to a
17 k Consecutive Calculations
• You can use the calculation result that is currently on the display (and also stored in ...the mantissa
and two digits for calculating cumulative totals.
• Independent memory uses the same memory area as the first value of your next calculation. • You can recall ...
User Guide - Page 20
... = p 1 \ 28 =
Scientific Function Calculations
COMP
Use the F key to enter the COMP Mode when you reach the angle unit setup screen shown below. particular variable: 0 A j 1.
This operation deletes the data assigned to variable A. • Perform the following key operation when you want to clear the values assigned to appear on the display before...
User Guide - Page 23
...(1, 3) to polar coordinates (r,) (Rad)
r ҃ 2
f* 1 P L 3 T =
* A f in the case of fx-100MS/fx-115MS/fx-570MS/ fx-991MS.
k Angle Unit Conversion • Press A v to display the value of r, or 0 o to display the following menu. * A n in the case of fx-100MS/fx-115MS/fx-570MS/
fx-991MS.
θ ҃ 1.047197551
0 o
• Press 0 n to display the value of .
21
User Guide - Page 34
... keep written copies of the same data us- If the above results can also input multiple entries of all modes and settings.
2. k Error Messages
The calculator is locked up while an error message is correct.
3. To input the data "20 and 30" five times, for example, press 20 P 30 A G 5 S. • The above steps do...
User Guide - Page 35
... operator stack has 24 levels. • Divide your input values and make required corrections. Syntax ERROR • Cause
• An attempt to perform an illegal mathematical operation.
• Action • Press e or r to display the calculation and correct the problem. Stack ERROR • Cause
• The capacity of an argument
33 Press t to clear the...
User Guide - Page 36
• Action • Press e or r to display the location of the cause of π, e (natu- k Order of Operations
Calculations are performed in front of precedence.
1 Coordinate transformation: Pol (x, y), Rec (r, θ) Differentials: d/dx* ...') Metric conversions**
3 Powers and roots: ^ (xy), x 4 ab/c 5 Abbreviated multiplication format in front of the error and make required corrections.
User Guide - Page 37
... error (Stack ERROR) occurs whenever you try to their precedence during calculations. Squaring a matrix, cubing a matrix, or inverting a matrix uses one stack level. (fx-570MS, fx-991MS only)
• Example:
1
23
45
123 4
56 7
Numeric Stack 12 23 34 45 54
Command Stack 1҂ 2 3 4ѿ 5҂
6 7ѿ
35
* fx-100MS/fx-115MS/fx-570MS/fx-991MS only. ** fx-570MS/fx-991MS...
User Guide - Page 40
... point of inflection, errors are cumulative and may become dim. Power Supply (fx-95MS only)
Users of other models should refer to turn power off.
Screw
38
Screw 2 Remove the six screws that battery power is low.
To replace the battery
1 Press A i to turn power on the display of the calculator when the battery...
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