OPERATION MANUAL
EL-5230 EL-5250
PROGRAMMABLE SCIENTIFIC CALCULATOR
Page
Before You Get Started
Programmable Scientific Calculator
Introduction
General Information
Chapter 1 Before You Get Started
Contents
Introduction
Chapter 2 General Information
Chapter 3 Scientific Calculations
Binary, Pental, Octal, Decimal and Hexadecimal Operations N-base
Chapter 6 Complex Number Calculations
Chapter 4 Statistical Calculations
Chapter 5 Equation Solvers
Chapter 7 Programming
Some like it hot Celsius-Fahrenheit conversion
Chapter 8 Application Examples
Purchasing with payment in n-month installments
How many digits can you remember?
Appendix
Introduction
Operational Notes
πRŒ˚-10
NORMAL MODE
Key Notation in This Manual
Example
Page
Chapter
Resetting the calculator
Before You Get Started
Preparing to Use the Calculator
The Hard Case
Calculator Layout and Display Symbols
Calculator layout
2ndF
Display
BUSY
xy /r θ
Operating Modes
Selecting a mode
What you can do in each mode
MODE-1 ƒNORMAL ⁄STAT ¤PROG ‹EQN
Turning the calculator on and off
A Quick Tour
8Œ‰3-7˚-10.5
Entering and solving an expression
8Œ‰3-7˚-10.5=
110.4504172
Editing an expression
110.4504172 8Œ‰3-7˚-10.5 8Œ‰3-7˚-10.5 =
0. 2„ÒR
NORMAL MODE 0. π NORMAL MODE 0. πRŒ
Using variables
NORMAL MODE
πRŒ= 201.0619298
NORMAL MODE
Using simulation calculations ALGB
1ı3πRŒH
1ı3πRŒH H=8
1ı3πRŒH= 670.2064328
1ı3πRŒH R=z 1ı3πRŒH= 678.5840132
V=1ı3πRŒH H=z V=1ı3πRŒH V=z678.5840132 V=1ı3πRŒH H=z
Using the solver function
AnsÒV 678.5840132 AnsÒV 678.5840132 V=1ı3πRŒH
Example
R¬ 678.5840132 L¬
Other features
10.125
Clearing the Entry and Memories
¤STAT ‹RESET
General Information
Memory clear key
123456
Overwrite mode and insert mode
Editing and Correcting an Equation
Cursor keys
3˚5+3˚2=
3˚5+3˚2= 21. 3˚5+3˚2
3˚5+3˚2= 21. 3˚5+2 3˚5+3˚2= 35+2
Delete key
Setting the floating point numbers system in scientific notation
The SET UP menu
SET UP ƒDRG ⁄FSE ¤
Determination of the angular unit
Using global variables
Using Memories
Using alphabetic characters
0. 6ÒA
¬ƒA¡
Using local variables
6. A=
1.25E-5ÒA1 0.0000125
1ıA¡-1000A=
Using variables in an equation or a program
0.0000125 A1=
¬ƒA¡
5Ans= 141.3716694
Using the last answer memory
3ι= 28.27433388
Global variable M
A-L, N-Z
Using memory in each mode
Mode
NORMAL MODE
z ALL DATA z z CLEARED! z z z
Resetting the calculator
zALL DATA CL?z z YES¬DEL z z NO¬ENTERz
Arithmetic operations
NORMAL mode
Scientific Calculations
Chapter
Functions
Constant calculations
jH$1.5 +
⁄ipart
Math menu Functions
ƒabs
¤int
Result
Function
Key operations
24∂Ωsec
Differential/Integral Functions
Differential function
Key operations
Integral function
Example
Result
When performing integral calculations
Random dice
Random Function
Random numbers
Random coin
Example
Angular Unit Conversions
Chain Calculations
Key operations
4.641588834
Fraction Calculations
4.833333333
0∂31∂1.5∂
Binary, Pental, Octal, Decimal, and Hexadecimal Operations N-base
11001.b
Time, Decimal and Sexagesimal Calculations
x =
Coordinate Conversions
r =
y =
Calculations Using Physical Constants
λc, p
Key operations
Result
λc, n
10 @j5e
Calculations Using Engineering Prefixes
100 @j6k
Prefix
Modify Function
Entering and solving an equation
Solver Function
TŒ=4πGMR
Changing the value of variables and editing an equation
A˚B=C˚D
A˚B=C˚D
A˚B=C˚D D=z
A˚B=C˚D
CALCULATION
ERROR
Important notes
A˚B=C˚D
Changing a value of variables and editing an expression
Simulation Calculation ALGB
Entering an expression for simulation calculation
πRŒH= 785.3981634
Simulate an equation for different values
BCsinA2
BCsinA2 B=z BCsinA2 C=5 BCsinA2= 7.5
BCsinA2
BCsinA2=
2BCsinA2 B=z
BCsinA2= 7.071067812
Chapter 3 Scientific Calculations
SAVERING
Filing Equations
EQTN FILE ƒLOAD ⁄SAVE ¤DEL SAVETITLE?
Saving an equation
TITLERING DELETE¬DEL QUIT¬ENTER
Loading and deleting an equation
DEL ¬º⁄RING º¤AREA-3 º‹CIRCUIT
Page
Inverse regression calculation
Statistical Calculations
Chapter
Single-variable statistical calculation
Linear regression calculation
Data entry
Data Entry and Correction
Quadratic regression calculation
Data correction
30 d d d
Example
Σx 2 - nx
Statistical Calculation Formulas
σx =
sx =
Standardization conversion formula
Normal Probability Calculations
Values for Pt, Qt, and Rt are given to six decimal places
Chapter 4 Statistical Calculations
x = 60 →Pt ?
Statistical Calculations Examples
⋅10+50=
t = -0.5 →Rt ?
x=3 → y=?
Key operations
Result
a1x + b1y = c1 a2x + b2y = c2
Equation Solvers
Simultaneous Linear Equations
D = D =
x+ y- z =
Z= D=
x= 3.238095238 y=-1.638095238
x = ?
Example
Quadratic and Cubic Equation Solvers
X¤-6.333333333
X⁄-1.233600307 X¤ 0.216800153 +1.043018296i
Example
Chapter
Complex Number Calculations
Complex Number Entry
+5.i
Entering the PROG mode
PROG mode
PROGRAM MODE ƒRUN ⁄NEW ¤EDIT ‹DEL
Selecting the NORMAL program mode or the NBASE program mode
TITLE? NORMAL
Creating a NEW Program
MODE
ƒNORMAL ⁄NBASE
Example
Use of variables
SLOPE NORMAL Y=M¡X+5 SLOPE NORMAL M¡=?
2. Entering the program
Input and display commands
Programming Commands
COMMAND-1 ƒPrint ⁄Print ¤Input ‹Wait
Indicates the line is a remark
Flow control
Gosub
Equalities and inequalities
STAT xy
Statistical Commands
STAT
Data
Editing a Program
Error Messages
ERROR LBL DUPLICATE BREAK
DEL ¬º⁄AREA º¤TEMP º‹STAT TITLEAREA DELETE¬DEL QUIT¬ENTER
PROGRAM MODE ƒRUN ⁄NEW ¤EDIT ‹DEL
Deleting Programs
Some like it hot Celsius-Fahrenheit conversion
Application Examples
Programming Examples
TEMP NORMAL PROGRAM?
PROGRAM MODE ƒRUN ⁄NEW ¤EDIT ‹DEL
Running the program
The Heron Formula
A + B + C T =
Example
SIDE LENGTHS
HERON NORMAL
Result
NBASE NBASE PROGRAM?
2B or not 2B N-base conversion
Running the program
Program code
Key operations
Example
T test
x - m t = sx2
Running the program
Program code
Key operations
Result
2X 1-X 2Y 2-Y 3 - X 2-X 3Y 1-Y
A circle that passes through 3 points
X 1 2+Y 1 2-X 2 2-Y 2 2Y 2-Y 3 - X 2 2+Y 2 2-X 3 2-Y 3 2Y 1-Y
X 1 2+Y 1 2-X 2 2-Y 2 2X 2-X 3 - X 2 2+Y 2 2-X 3 2-Y 3 2X 1-X
Example
Program code
Key operations
Result
Example
Radioactive decay
DECAY NORMAL PROGRAM?
Mº=?
DECAY NORMAL
ORIGINAL MASS
T= YEARS
Delta-Y impedance circuit transformation
Program code
Key operations
Program code
1DELTA TO Y
2Y TO DELTA
Key operations
sin A + B
Obtaining tensions of strings
= -- =
A, B angles that strings make from perpendicular lines DMS
Results
21.966
23.761 T=
Example
1 - 1 + i -n
Purchasing with payment in n-month installments
n n-month installment
P price of the product
Print S
PRICE
PAYBYMNNORMAL
i 0 S e
Key operations
Digital dice
Program code
Running the program
How many digits can you remember?
Program code
Key operations
Running the program
Program code
Key operations
86164.09 86164.09 AnsÒT 8.616
Calculation Examples
23∂56∂4.09∂Ωse
Geosynchronous orbits
Twinkle, twinkle, little star Apparent magnitude of stars
4.217
7.424
TŒ=4πŒGM˚ R„ R=z
Example
1Î0.4˚4.8-2. 89=
4.8-log0.0003 0.4=
Result
Example
DATA SET= 3. 7.95,108DATA DATA SET= DATA SET= 4. Í≈= 13254.15
Memory calculations
Result
The state lottery
50Ç6= 15890700
15890700. 35∏5= 38955840
Example
When to replace the batteries
Battery Replacement
Notes on battery replacement
Appendix
Replacement procedure
Cautions
z YES¬DEL z
Automatic power off function
zALL DATA CL?z
z NO¬ENTERz
OPTION ƒCTRST ⁄M.CHK
The OPTION menu
¤DELETE LCD CONTRAST + DARK ¬LIGHT
The OPTION display
DELETE ƒEQTN ⁄PROG
If an Abnormal Condition Occurs
Deleting equation files and programs
Error message
Error Messages
Error no
Solution
‘Dead end’ approximations
Using the Solver Function Effectively
Newton’s method
Range of expected values
Changing the range of expected values
RANGEab
Calculation accuracy
Solving y = x3 - 3x2 + x + 5 for y =
Equations that are difficult to solve
Solving y = sin x for y =
Technical Data
Calculation ranges
x, y → r, θ
Dynamic range
Memory usage
Function
Variables
Priority levels in calculations
Filing Equation functions
Specifications
For More Information about Scientific Calculators
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