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