Sharp EL 5250 5230/5250 Operation Manual GB User To The C1686546 9d23 4209 9761 C042b2690293

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EL-5230/EL-5250
04LGK (TINSE0796EHZZ)
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA

PROGRAMMABLE SCIENTIFIC CALCULATOR

SHARP CORPORATION

®

EL-5230
EL-5250

PROGRAMMABLE SCIENTIFIC
CALCULATOR
OPERATION MANUAL

SHARP EL-5230/5250
Programmable Scientific Calculator
Introduction
Chapter 1:

Before You Get Started
Chapter 2:

General Information
Chapter 3:

Scientific Calculations
Chapter 4:

Statistical Calculations
Chapter 5:

Equation Solvers
Chapter 6:

Complex Number Calculations
Chapter 7:

Programming
Chapter 8:

Application Examples
Appendix

1

Contents
Introduction ...........................................................7
Operational Notes .................................................................................... 8
Key Notation in This Manual .................................................................... 9

Chapter 1: Before You Get Started .....................11
Preparing to Use the Calculator ............................................................ 11
Resetting the calculator ................................................................. 11
The Hard Case ....................................................................................... 12
Calculator Layout and Display Symbols ................................................ 13
Operating Modes ................................................................................... 15
Selecting a mode ........................................................................... 15
What you can do in each mode ..................................................... 15
A Quick Tour ........................................................................................... 16
Turning the calculator on and off ................................................... 16
Entering and solving an expression ............................................... 16
Editing an expression ..................................................................... 17
Using variables ............................................................................... 18
Using simulation calculations (ALGB) ........................................... 19
Using the solver function ................................................................ 21
Other features ................................................................................ 22

Chapter 2: General Information .........................23
Clearing the Entry and Memories .......................................................... 23
Memory clear key ........................................................................... 23
Editing and Correcting an Equation ...................................................... 24
Cursor keys .................................................................................... 24
Overwrite mode and insert mode .................................................. 24
Delete key ....................................................................................... 25
Multi-entry recall function ............................................................... 25
The SET UP menu ................................................................................. 26
Determination of the angular unit .................................................. 26
Selecting the display notation and number of decimal places ...... 26

2

Contents

Setting the floating point numbers system in scientific notation ... 26
Using Memories ..................................................................................... 27
Using alphabetic characters .......................................................... 27
Using global variables .................................................................... 27
Using local variables ...................................................................... 28
Using variables in an equation or a program ................................. 29
Using the last answer memory ...................................................... 30
Global variable M ........................................................................... 30
Using memory in each mode ......................................................... 31
Resetting the calculator ................................................................. 32

Chapter 3: Scientific Calculations .....................33
NORMAL mode ...................................................................................... 33
Arithmetic operations ..................................................................... 33
Constant calculations ..................................................................... 34
Functions ................................................................................................ 34
Math menu Functions ............................................................................ 36
Differential/Integral Functions ................................................................ 38
Differential function ........................................................................ 38
Integral function .............................................................................. 39
When performing integral calculations .......................................... 40
Random Function .................................................................................. 41
Random numbers ........................................................................... 41
Random dice .................................................................................. 41
Random coin .................................................................................. 41
Random integer .............................................................................. 41
Angular Unit Conversions ...................................................................... 42
Chain Calculations ................................................................................. 42
Fraction Calculations ............................................................................. 43
Binary, Pental, Octal, Decimal and Hexadecimal Operations (N-base) ... 44
Time, Decimal and Sexagesimal Calculations ...................................... 46
Coordinate Conversions ........................................................................ 47
Calculations Using Physical Constants ................................................. 48
Calculations Using Engineering Prefixes .............................................. 50
Modify Function ...................................................................................... 51

3

Contents

Solver Function ...................................................................................... 52
Entering and solving an equation .................................................. 52
Changing the value of variables and editing an equation ............. 52
Solving an equation ....................................................................... 53
Important notes .............................................................................. 54
Simulation Calculation (ALGB) .............................................................. 55
Entering an expression for simulation calculation ......................... 55
Changing a value of variables and editing an expression ............. 55
Simulate an equation for different values ...................................... 56
Filing Equations ..................................................................................... 58
Saving an equation ........................................................................ 58
Loading and deleting an equation ................................................. 59

Chapter 4: Statistical Calculations ....................61
Single-variable statistical calculation ............................................. 62
Linear regression calculation ......................................................... 62
Exponential regression, logarithmic regression,
power regression, and inverse regression calculation .................. 62
Quadratic regression calculation ................................................... 63
Data Entry and Correction ..................................................................... 63
Data entry ....................................................................................... 63
Data correction ............................................................................... 63
Statistical Calculation Formulas ............................................................ 65
Normal Probability Calculations ............................................................ 66
Statistical Calculations Examples ......................................................... 67

Chapter 5: Equation Solvers ..............................69
Simultaneous Linear Equations ............................................................. 69
Quadratic and Cubic Equation Solvers ................................................. 71

Chapter 6: Complex Number Calculations .......73
Complex Number Entry ......................................................................... 73

Chapter 7: Programming ....................................75
PROG mode ........................................................................................... 75

4

Contents

Entering the PROG mode .............................................................. 75
Selecting the NORMAL program mode or the NBASE
program mode ................................................................................ 75
Programming concept .................................................................... 75
Keys and display ............................................................................ 76
Creating a NEW Program ...................................................................... 76
Creating a NEW program ............................................................... 76
Use of variables .............................................................................. 77
Programming Commands ...................................................................... 79
Input and display commands ......................................................... 79
Flow control .................................................................................... 81
Equalities and inequalities ............................................................. 82
Statistical Commands ............................................................................ 83
Editing a Program .................................................................................. 84
Error Messages ...................................................................................... 85
Deleting Programs ................................................................................. 86

Chapter 8: Application Examples ......................87
Programming Examples ........................................................................ 87
Some like it hot (Celsius-Fahrenheit conversion) .......................... 87
The Heron Formula ........................................................................ 89
2B or not 2B (N-base conversion) ................................................. 91
T test ............................................................................................... 93
A circle that passes through 3 points ............................................ 95
Radioactive decay .......................................................................... 97
Delta-Y impedance circuit transformation ..................................... 99
Obtaining tensions of strings ....................................................... 102
Purchasing with payment in n-month installments ...................... 104
Digital dice .................................................................................... 106
How many digits can you remember? ......................................... 107
Calculation Examples .......................................................................... 110
Geosynchronous orbits ................................................................ 110
Twinkle, twinkle, little star (Apparent magnitude of stars) ........... 111
Memory calculations .................................................................... 113
The state lottery ........................................................................... 114

5

Contents

Appendix ............................................................115
Battery Replacement ........................................................................... 115
Batteries used .............................................................................. 115
Notes on battery replacement ..................................................... 115
When to replace the batteries ...................................................... 115
Cautions ....................................................................................... 116
Replacement procedure ............................................................... 116
Automatic power off function ........................................................ 117
The OPTION menu .............................................................................. 118
The OPTION display .................................................................... 118
Contrast ........................................................................................ 118
Memory check .............................................................................. 118
Deleting equation files and programs .......................................... 119
If an Abnormal Condition Occurs ........................................................ 119
Error Messages .................................................................................... 120
Using the Solver Function Effectively .................................................. 121
Newton’s method .......................................................................... 121
‘Dead end’ approximations ........................................................... 121
Range of expected values ............................................................ 121
Calculation accuracy .................................................................... 122
Changing the range of expected values ...................................... 122
Equations that are difficult to solve .............................................. 123
Technical Data ..................................................................................... 124
Calculation ranges ....................................................................... 124
Memory usage ............................................................................. 126
Priority levels in calculations ........................................................ 127
Specifications ....................................................................................... 128
For More Information about Scientific Calculators .............................. 129

6

Introduction
Thank you for purchasing the SHARP Programmable Scientific Calculator
Model EL-5230/5250.
After reading this manual, store it in a convenient location for future reference.
• Unless the model is specified, all text and other material appearing in this
manual applies to both models (EL-5230 and EL-5250).
• Either of the models described in this manual may not be available in
some countries.
• Screen examples shown in this manual may not look exactly the same as
what is seen on the product. For instance, screen examples will show only
the symbols necessary for explanation of each particular calculation.
• All company and/or product names are trademarks and/or registered
trademarks of their respective holders.

7

Introduction

Operational Notes
• Do not carry the calculator around in your back pocket, as it may break
when you sit down. The display is made of glass and is particularly fragile.
• Keep the calculator away from extreme heat such as on a car dashboard
or near a heater, and avoid exposing it to excessively humid or dusty
environments.
• Since this product is not waterproof, do not use it or store it where fluids,
for example water, can splash onto it. Raindrops, water spray, juice, coffee,
steam, perspiration, etc. will also cause malfunction.
• Clean with a soft, dry cloth. Do not use solvents or a wet cloth.
• Do not drop it or apply excessive force.
• Never dispose of batteries in a fire.
• Keep batteries out of the reach of children.
• This product, including accessories, may change due to upgrading without
prior notice.

NOTICE
• SHARP strongly recommends that separate permanent written
records be kept of all important data. Data may be lost or altered in
virtually any electronic memory product under certain circumstances. Therefore, SHARP assumes no responsibility for data lost
or otherwise rendered unusable whether as a result of improper use,
repairs, defects, battery replacement, use after the specified battery
life has expired, or any other cause.
• SHARP will not be liable nor responsible for any incidental or
consequential economic or property damage caused by misuse and/
or malfunctions of this product and its peripherals, unless such
liability is acknowledged by law.

8

Introduction

Key Notation in This Manual
In this manual, key operations are described as follows:
To specify ex : @ " ..................... 햲
To specify In : i
To specify F : ; F ........................... 햳
To specify d/c : @ F ..................... 햲
To specify ab/c : k
To specify H : ; H ........................... 햳
To specify i

: Q .............................. 햴

햲 Functions that are printed in orange above the key require @ to be
pressed first before the key.
햳 When you specify the memory (printed in blue above the key), press
; first.
Alpha-numeric characters for input are not shown as keys but as regular
alpha-numeric characters.
햴 Functions that are printed in grey (gray) adjacent to the keys are effective
in specific modes.

Note:
• To make the cursor easier to see in diagrams throughout the manual,
it is depicted as ‘_’ under the character though it may actually appear
as a rectangular cursor on the display.

Example
Press j @ s ; R
A k S 10
• @ s and ; R means you have
to press @ followed by ` key and
; followed by 5 key.

NORMAL MODE
0.
πRŒ˚–10_

9

10

Chapter 1

Before You Get Started
Preparing to Use the Calculator
Before using your calculator for the first time, you must reset it and adjust its
contrast.

Resetting the calculator
1.

Press the RESET switch located on the
back of the calculator with the tip of a ballpoint pen or similar object. Do not use an
object with a breakable or sharp tip.

• If you do not see the message on the
right, the battery may be installed
incorrectly; refer to ‘Battery Replacement’
(See page 115.) and try installing it again.
2.

Press y.
• The initial display of the NORMAL mode
appears.

3.

Press @ o 0 and press + or
- to adjust the display contrast until it
is set correctly, then press j.
• @ o means you have to press @
followed by S key.

zALL DATA CL?z
z YES¬[DEL] z
z NO¬[ENTER]z
NORMAL MODE
0.

LCD CONTRAST
[+]
[-]
DARK® ¬LIGHT

• See ‘The OPTION menu’ (See page 118.) for more information
regarding optional functions.

11

Chapter 1: Before You Get Started

The Hard Case
Your calculator comes with a hard case to protect the keyboard and display
when the calculator is not in use.
Before using the calculator, remove the hard case and slide it onto the back
as shown to avoid losing it.

When you are not using the calculator, slide the hard case over the keyboard
and display as shown.

• Firmly slide the hard case all the way to the edge.
• The quick reference card is located inside the hard case.
• Remove the hard case while holding with fingers placed in the positions
shown below.

12

Chapter 1: Before You Get Started

Calculator Layout and Display Symbols
Calculator layout

1 Display screen

2 Power ON/OFF
and Clear key
3 Key operation
keys

4 Cursor keys

1 Display screen: The calculator display consists of 14 × 3 line dot matrix
display (5 × 7 dots per character) and a 2-digit exponent display per each
line.
2 Power ON/OFF and Clear key: Turns calculator ON. To turn off the
calculator, press @, then o. This key can also be used to clear the
display.
3 Key operation keys:
@: Activates the second function (printed in orange) assigned to the
next pressed key.
;: Activates the variable (printed in blue) assigned to the next
pressed key.
4 Cursor keys: Enables you to move the cursor in four directions.

13

Chapter 1: Before You Get Started

Display
Symbol
Dot matrix
display

Mantissa

Exponent

• During actual use, not all symbols are displayed at the same time.
• Only the symbols required for the usage under instruction are shown in the
display and calculation examples of this manual.
: Indicates some contents are hidden in the directions shown.
Press cursor keys to see the remaining (hidden) section.

BUSY : Appears during the execution of a calculation.
2ndF

: Appears when @ is pressed.

xy/rθ

: Indicates the mode of expression of results in the complex
calculation mode.

HYP

: Indicates that H has been pressed and the hyperbolic functions
are enabled. If @ > are pressed, the symbols ‘2ndF HYP’
appear, indicating that inverse hyperbolic functions are enabled.

ALPHA: Appears when ;, @ a, x or t is pressed.
FIX/SCI/ENG: Indicates the notation used to display a value.
DEG/RAD/GRAD: Indicates angular units.
: Appears when statistics mode is selected.
M

14

: Indicates that a value is stored in the M memory.

Chapter 1: Before You Get Started

Operating Modes
This calculator has five operating modes to perform various operations.
These modes are selected from the MODE key.

Selecting a mode
1.

Press b.
The menu display appears.
Press d to display the next menu
page.


ƒNORMAL ⁄STAT
¤PROG
‹EQN

›CPLX

2.

Press 0 to select the NORMAL mode.
• In the menu display, press the assigned
number to choose or recall a selection.

NORMAL MODE
0.

What you can do in each mode
NORMAL mode:
Allow you to perform standard scientific calculations, Differential/Integral
functions, N-base calculations, Solver function, Simulation calculation.
STAT (statistics) mode:
Allows you to perform statistical calculations.
PROG (program) mode:
Allows you to create and use programs to automate simple or complex
calculations.
EQN (equation) mode:
Allows you to perform equation solvers, such as quadratic equation.
CPLX (complex) mode:
Allows you to perform arithmetic operations with complex numbers.

15

Chapter 1: Before You Get Started

A Quick Tour
This section takes you on a quick tour covering the calculator’s simple
arithmetic operations and also principal features like the solver function.

Turning the calculator on and off
Press j at the top right of the keypad
to turn the calculator on.

1.

NORMAL MODE
0.

• To conserve the batteries, the calculator
turns itself off automatically if it is not used
for several minutes.
Press @ o to turn the calculator off.

2.

• Whenever you need to execute a function or command which is written
in orange above a key, press @ followed by the key.

Entering and solving an expression
Arithmetic expressions should be entered in the same order as they would
normally be written in. To calculate the result of an expression, press e at
the bottom right of the keypad; this has the same function as the ‘equals’ key
on some calculators.

Example
Find the answer to the expression
82 ÷ 았앙
3 – 7 × -10.5
8Az@*3NORMAL MODE
7 k S 10.5
0.
• This calculator has a minus key 8Œ©‰3-7˚–10.5_
for subtraction and a negative key S
for entering negative numbers.
• To correct an error, use the cursor keys
l r u d to move to the appropriate position on the
display and type over the original expression.

1.

2. Press e to obtain an answer.
• While the calculator is computing an
answer, BUSY is displayed at the above
left of the display.
• The cursor does not have to be at the
end of an expression for you to obtain
an answer.

16

0.
8Œ©‰3-7˚–10.5=
110.4504172

Chapter 1: Before You Get Started

Editing an expression
After obtaining an answer, you can go back to an expression and modify it
using the cursor keys just as you can before the e is pressed.

Example
Return to the last expression and change it to
82 ÷ 았3 – 7 × -10.5
Press d or r to return to the
8Œ©‰3-7˚–10.5=
last expression.
110.4504172
• The cursor is now at the beginning of
8Œ©‰3-7˚–10.5
the expression (on ‘8’ in this case).
• Pressing u or l after obtaining
an answer returns the cursor to the end
of the last expression.
• To make the cursor easier to see in diagrams throughout the manual,
it is depicted as ‘_’ under the character though it may actually appear
as a rectangular cursor on the display.

1.

Press r four times to move the
cursor to the point where you wish to
make a change.
• The cursor has moved four places to the
right and is now flashing over ‘3’.

2.

8Œ©‰3-7˚–10.5=
110.4504172
8Œ©‰3-7˚–10.5

3. Press @ O .
• This changes the character entering mode from ‘overwrite’ to ‘insert’.
• When @ is pressed the 2ndF symbol should appear at the above
of the display. If it does not, you have not pressed the key firmly
enough.
• The shape of the flashing cursor tells you which character entering
mode you are in. A triangular cursor indicates ‘insert’ mode while a
rectangular cursor indicates ‘overwrite’ mode.
Press ( and then move the cursor
to the end of expression (@ r).
• Note that the cursor has moved to the
second line since the expression now
exceeds 14 characters.

4.

5.

Press ) and e to find the
answer for the new expression.

110.4504172
8Œ©‰(3-7˚–10.5

8Œ©‰(3-7˚–10.5
)=
7.317272966

17

Chapter 1: Before You Get Started

Using variables
You can use 27 variables (A-Z and θ) in the NORMAL mode. A number
stored as a variable can be recalled either by entering the variable name or
using t.

Example 1
Store 23 to variable R.
1. Press j 2 1 then x.
• j clears the display.
• ALPHA appears automatically when you
press x. You can now enter any
alphabetic character or θ (written in blue
above keys in the keypad).

2„Ò_

2. Press R to store the result of 23 in R.
• The stored number is displayed on the
next line.
• ALPHA disappears from the display.

2„ÒR

NORMAL MODE
0.

0.
8.

You can also store a number directly
rather than storing the result of an expression.

Example 2
Find the area of a circle which has radius R.

r

S = πr 2

Enter an expression containing variable R (now equal to 8) from the last
example.
1. Press j @ s then ;.
• Whenever you need to use a character
written in blue on the keypad, press
; beforehand. ALPHA will appear at
the above of the display.
2. Press R and then A.
• ALPHA disappears after you have
entered a character.

18

NORMAL MODE
0.
π_
NORMAL MODE
0.
πRŒ_

Chapter 1: Before You Get Started

3.

Press e to obtain the result.
Follow the same procedure as above,
but press t instead of ; in
step 1.

0.
πRŒ=
201.0619298

You will get the same result.

Using simulation calculations (ALGB)
If you want to find more than one solution using the same formula or
algebraic equation, you can do this quickly and simply by use of the
simulation calculation.

Example

h

Find the volume of two cones:
1 with height 10 and radius 8 and
2 with height 8 and radius 9.

r
V=

Press j 1 k 3 @ s
; R A ; H to enter the
formula.
• Note that ‘1 3’ represents 1 over (i.e.
divided by) 3.
• Variables can be represented only by
capital letters.

1.

1 2
πr h
3

NORMAL MODE
0.
1ı3πRŒH_

Press @ G (I key) to finish
1ı3πRŒH
entering the equation.
• The calculator automatically picks out
H=z
0.
the variables alphabetically contained in
the equation in alphabetical order and
asks you to input numbers for them.
• at the bottom of the display reminds you that there is another
variable further on in the expression.

2.

Press 10 e to input the height and
go on the next variable.
• The calculator is now asking you to
input a number for the next variable.

3.

1ı3πRŒH
R=z

8.

19

Chapter 1: Before You Get Started

• Note that, as the variable R already has a number stored in memory,
the calculator recalls that number.
• indicates that there is another variable earlier in the expression.
4.

Press 8 to input the radius.
Input of all variables is now complete.

5.

Press e to obtain the solution.

•

The answer (volume of cone ���) is
displayed on the third line.

Press e and 8 to input the height
for cone ���.
• The display returns to a value entry
screen with ‘8’ substituted for ‘10’ in
variable H.

6.

7.

Press e to confirm the change.

1ı3πRŒH=
670.2064328

1ı3πRŒH
H=8_
1ı3πRŒH
R=z

Press 9 to enter the new radius then
press e to solve the equation.
• The volume of cone ��� is now displayed.
• In any step, press @ h to obtain
the solution using the values entered
into the variables at that time.

8.

8.

20

1ı3πRŒH=
678.5840132

Chapter 1: Before You Get Started

Using the solver function
You can solve any unknown variable in an equation by assigning known
values to the rest of the variables. Let us compare the differences between
the solver function and the simulation calculations using the same expression as in the last example.

Example
What is the height of cone 3 if it has a radius of 8
and the same volume as cone 2 (r = 9, h = 8) in
the last example?

h
r
V=

9.

Store the result of step 8 on the
previous page in variable V.
Press j twice and ; <
x V.

10. Input the equation (including ‘=’) in the
NORMAL mode.
Press ; V ; = then input
the rest of the expression.
You must press ; = ( m
key), not e, to enter the = sign.
11. Press I 5 to move to the
variable input display.
• Note that the values assigned to the
variables in the last example for the
simulation calculations are retained and
displayed.
12. Press d to skip the height, and
then press 8 e to enter the radius
(R).
• The cursor is now on V. The value that
was stored in step 9 is displayed.
(volume of cone 2)
13. Press u u to go back to the
variable H.
• This time the value of H from memory is
also displayed.

1 2
πr h
3

0.
AnsÒV
678.5840132

AnsÒV
678.5840132
V=1ı3πRŒH_

V=1ı3πRŒH
H=z

8.

V=1ı3πRŒH
V=z678.5840132

V=1ı3πRŒH
H=z

8.

21

Chapter 1: Before You Get Started

14. Press @ h to find the height of
H=
10.125
cone 3.
R¬
678.5840132
• Note that the calculator finds the
L¬ 678.5840132
value of the variable that the cursor is
Right and left sides of the
on when you press @ h.
expression after substituting
• Now you have the height of cone 3
the known variables
that has the same volume as cone
Height of cone 3
2.
• R→ and L→ are the values computed
by Newton's method, which is used to determine the accuracy of
the solution.

Other features
Your calculator has a range of features that can be used to perform many
calculations other than those we went through in the quick tour. Some of the
important features are described below.
Statistical calculations:
You can perform one- and two- variable weighted statistical calculations,
regression calculations, and normal probability calculations. Statistical
results include mean, sample standard deviation, population standard
deviation, sum of data, and sum of squares of data. (See Chapter 4.)
Equation solvers:
You can perform solvers of simultaneous linear equation with two/three
unknowns or quadratic/cubic equation. (See Chapter 5.)
Complex number calculations:
You can perform addition, subtraction, multiplication, and division
calculations. (See Chapter 6.)
Programming:
You can program your calculator to automate certain calculations. Each
program can be used in either the NORMAL or NBASE program modes.
(See Chapter 7.)

22

Chapter 2

General Information
Clearing the Entry and Memories
Operation

Entry
Local
(Display) A- Z, θ*1 variables

j
Mode selection
@P0
@P1y
@P2y

×
×
×

×

×

×

×

Saved equations*2 Multi-entry
recall,
STAT*4
including saved
local variables
ANS*3 STAT VAR*5

×
×
×
×
×

×
×
×

×
× *6
×
×

@P3y
RESET switch
: Clear

*1
*2
*3
*4
*5
*6

× : Retain

Global variable memories.
Saved equations and local variables by the filing equations function
Last answer memory.
Statistical data (entered data)
n, x̄, sx, σ x, Σ x, Σ x 2, ȳ, sy, σ y, Σ y, Σ y 2, Σ xy, a, b, c, r.
Will be cleared when changing between sub-modes in the STAT mode.

Note:
• To clear one variable memory of global variable and local variable
memories, press j x and then choose memory.

Memory clear key
Press @ P to display the menu.
• To initialize the display mode, press 0.
The parameters set as follows.
• Angular unit: DEG (See page 26.)
• Display notation: NORM1 (See page 26.)
• N-base: DEC (See page 44.)


ƒDISP ⁄MEMORY
¤STAT ‹RESET

• To clear all variables (excluding local variables of saved equations,
statistical data and STAT variables), press 1 y.
• To clear statistical data and STAT variables, press 2 y.
• To RESET the calculator, press 3 y. The RESET operation will
erase all data stored in memory and restore the calculator’s default setting.

23

Chapter 2: General Information

Editing and Correcting an Equation
Cursor keys
Incorrect keystrokes can be changed by using the cursor keys
(l r u d).

Example
Enter 123456 then correct it to 123459.
1.

Press j 123456.

NORMAL MODE
0.
123456_

2. Press y 9 e.
0.
• If the cursor is located at the right end
123459=
of an equation, the y key will
123459.
function as a backspace key.
• You can return to the equation just after
getting an answer by pressing the cursor keys. After returning to the
equation, the following operations are useful;
@ l or @ r: To jump the cursor to the beginning or the
end of equation.

Overwrite mode and insert mode
• Pressing @ O switches between the two editing modes: overwrite
mode (default); and insert mode. A rectangular cursor indicates preexisting
data will be overwritten as you make entries, while a triangular cursor
indicates that an entry will be inserted at the cursor.
• In the overwrite mode, data under the cursor will be overwritten by the
number you enter. To insert a number in the insert mode, move the cursor
to the place immediately after where you wish to insert, then make the
desired entry.
• The mode set will be retained until @ O is pressed or a RESET
operation is performed.

24

Chapter 2: General Information

Delete key
• To delete a number/function, move the cursor to the number/function you
wish to delete, then press y. If the cursor is located at the right end of
an equation, the y key will function as a backspace key.

Multi-entry recall function
Previous equations can be recalled in the NORMAL, STAT or CPLX mode.
Up to 160 characters of equations can be stored in memory.
When the memory is full, stored equations are deleted in the order of the
oldest first.
• Pressing @ g will display the previous equation. Further pressing
@ g will display preceding equations.
• You can edit the equation after recalling it.
• The multi-entry memory is cleared by the following operations: mode
change, memory clear (@ P 1 y), RESET, N-base conversion.

Example
Input three expressions and then recall them.
1 3(5+2)=
2 3×5+2=
3 3×5+3×2=
1.

Press j 3 ( 5 + 2 ) e
3k 5+2e

17.
3˚5+3˚2=
21.

3k 5+3k2e
2.

Press @ g to recall the
expression 3.

3˚5+3˚2=
21.
3˚5+3˚2

3.

Press @ g to recall the
expression 2.

3˚5+3˚2=
21.
3˚5+2

4.

Press @ g to recall the
expression 1.

3˚5+3˚2=
21.
3(5+2)
25

Chapter 2: General Information

The SET UP menu
The SET UP menu enables you to change the angular unit and the display
format.
• Press @ J to display the SET UP
menu.
• Press j to exit the SET UP menu.


ƒDRG
⁄FSE
¤---

Determination of the angular unit
The following three angular units (degrees,
radians, and grads) can be specified.
• DEG(°) : Press @ J 0 0
• RAD (rad): Press @ J 0 1
• GRAD (g) : Press @ J 0 2

Selecting the display notation and number of decimal places
Five display notation systems are used to display calculation results: Two
settings of Floating point (NORM1 and NORM2), Fixed decimal point (FIX),
Scientific notation (SCI) and Engineering notation (ENG).
• When @ J 1 0 (FIX) or @ J 1 2 (ENG) is
pressed, ‘TAB(0-9)?’ will be displayed and the number of decimal places
(TAB) can be set to any value between 0 and 9.
• When @ J 1 1 (SCI) is pressed, ‘SIG(0-9)?’ will be displayed and the number of significant digits (SIG) can be set to any value
between 0 and 9. Entering 0 will set a 10-digit display.
• When a floating point number does not fit in the specified range, the
calculator will display the result using the scientific notation (exponential
notation) system. See the next section for details.

Setting the floating point numbers system in scientific
notation
The calculator has two settings for displaying a floating point number:
NORM1 (default setting) and NORM2. In each display setting, a number is
automatically displayed in scientific notation outside a preset range:
• NORM1: 0.000000001 ≤ |x| ≤ 9999999999
• NORM2: 0.01 ≤ |x| ≤ 9999999999

26

Chapter 2: General Information

Example
100000÷3=
[Floating point (NORM1)]
→[FIXed decimal point
and TAB set to 2]
→[SCIentific notation
and SIG set to 3 ]
→[ENGineering notation
and TAB set to 2]
→[Floating point (NORM1)]
3÷1000=
[Floating point (NORM1)]
→[Floating point (NORM2)]
→[Floating point (NORM1)]

Key operations

Result

j@J13
100000 z 3 e
@J102

33333.33333
33333.33
04

@J113

3.33˚10

@J122

33.33˚10

@J13

03

33333.33333

j 3 z 1000 e
@J14
@J13

0.003
-03
3.˚10
0.003

Using Memories
The calculator uses global variable memories (A–Z and θ), local variable
memories (maximum of nine variables per equation), and a last answer
memory used when solving equations.

Using alphabetic characters
You can enter an alphabetic character (written
in blue) when ALPHA is displayed at the top of
the display. To enter this mode, press ;.
To enter more than one alphabetic character,
press @ a to apply the alphabet-lock
mode. Press ; to escape from this mode.

NORMAL MODE
0.

Using global variables
You can assign values (numbers) to global variables by pressing x then
A–Z and θ.

Example 1
Store 6 in global variable A.
1.

Press j 6 x A.

• There is no need to press ; because
ALPHA is selected automatically when
you press x.

0.
6ÒA
6.

27

Chapter 2: General Information

Example 2
Recall global variable A.
1. Press t A.
• There is no need to press ; because
ALPHA is selected automatically when
you press t.

6.
A=
6.

Using local variables
Nine local variables can be used in each equation or program, in addition to
the global variables. Unlike global variables, the values of the local variables
will be stored with the equation when you save it using the filing equations
function. (See page 58.)
To use local variables, you first have to assign the name of the local variable
using two characters: the first character must be a letter from A to Z or θ and
the second must be a number from 0 to 9.

Example
Store 1.25 x 10-5 as local variable A1 (in the NORMAL mode) and
recall the stored number.
1. Press @ v.
• The VAR menu appears.
• If no local variables are stored yet,
ALPHA appears automatically and the
calculator is ready to enter a name.
2. Press A1 e.
• ¬ shows that you have finished assigning
the name A1.
• To assign more names, press d to
move the cursor to VAR 1 and repeat the
process above.

ƒz
⁄
¤

‹
›
fi

fl
‡
°

¬ƒA¡ ‹
⁄
›
¤
fi

fl
‡
°

3. Press j.
• This returns you to the previous screen.
4.

28

Press 1.25 ` S 5 x @
v 0.

0.
1.25E–5ÒA1
0.0000125

Chapter 2: General Information

• You do not need to enter an alphabetic character. Just specify the
named local variable using a number from 0 to 8, or move the arrow
to the appropriate variable the press e.
5. Press @ v 0 e.
• The value of VAR 0 will be recalled.
• Alternatively you can recall a variable by
moving the arrow to it then press e
twice.

0.0000125
A1=
0.0000125

Note:
• You can change the name of a local variable by overwriting it in the VAR
menu. The cursor appears when r is pressed in the VAR menu.
• Local variables not stored using the filing equations function will be
deleted by mode selection or memory clear operation (@ P
1 y).
• Local and global variables will be cleared by creating a new program,
and editing and running a program.

Using variables in an equation or a program
Both global and local variables can be used directly in an equation or a
program. Local variables are useful when you need to use variables such as
X1 and X2 at the same time in another equation. The local variable names
and their values can be saved in each equation. (See page 58.)

Example
Using A (6) and A1 (0.0000125) from the last two examples, solve the
expression.
1
— – 1000A
A1
1. Press j 1 k.
• Start entering the expression.

NORMAL MODE
0.
1ı_

2.

Press @ v.

3. Press 0 - 1000 ; A e.
• The display returns automatically to the
previous screen after you have chosen
the local variable, and you can continue
to enter the expression.
• You do not need k if you use a
variable. However, the variable must be
a multiplier.

¬ƒA¡ ‹
⁄
›
¤
fi

fl
‡
°

0.
1ıA¡-1000A=
74000.
29

Chapter 2: General Information

Using the last answer memory
The calculator always keeps the most recent answer in ANS memory and
replaces it with the new answer every time you press an ending instruction
(e, x etc.). You may recall the last answer and use it in the next
equation.

Example
Evaluate the base area (S = 32π) and
volume of a cylinder (V = 5S) using the last
answer memory.

h=5

r=3

1. Press j 3 A @ s e.
• The area of the base is now calculated.
• The number 28.27433388 is held in ANS
memory.

0.
3ι=
28.27433388

2. Press j 5 ; < e.
• You now have the volume of the
cylinder.

0.
5Ans=
141.3716694

The last answer is cleared (i.e. set to 0) if you
press the RESET switch, change the mode or memory clear operation (@
P 1 y), but not if you turn the calculator off.

Global variable M
Using the M memory, in addition to the features of global variables, a value
can be added to or subtracted from an existing memory value.

Example
$150×3:Ma
+)$250:Mb=Ma+250
–)Mb×5%
M

Key operations
jxM
150 k 3 m
250 m
t Mk 5@ %
@MtM

• m and @ M cannot be used in the STAT mode.

30

Result
0.
450.
250.
35.
665.

Chapter 2: General Information

Using memory in each mode
Mode

ANS

M

A-L, N-Z,

Local variables

NORMAL
STAT
PROG
EQN
CPLX
: Available

: Unavailable

Notes:
• Calculation results from the functions indicated below are automatically stored in memories replacing any existing values.
• →r θ, →xy.................. R memory (r)
θ memory (θ)
X memory (x)
Y memory (y)
• Use of t or ; will recall the value stored in memory using up
to 14 digits in accuracy.

31

Chapter 2: General Information

Resetting the calculator
If you wish to clear all memories, variables, files and data, or if none of the
keys (including j) will function, press the RESET switch located on the
back of the calculator.
In rare cases, all the keys may cease to function if the calculator is subjected
to strong electrical noise or heavy shock during use. Follow the instructions
below to reset the calculator.
Caution:
• The RESET operation will erase all data stored in memory and
restore the calculator's default setting.
1.

Press the RESET switch located on the
back of the calculator with the tip of a ballpoint pen or similar object. Do not use an
object with a breakable or sharp tip.

• A display appears asking you to confirm
that you really want to reset the calculator.

Press y.

2.

• All memories, variables, files and data are
cleared.
• The display goes back to the initial display in
the NORMAL mode.
• The calculator will revert to the very first
settings that were made when you started
to use the calculator for the first time.

zALL DATA CL?z
z YES¬[DEL] z
z NO¬[ENTER]z
z ALL DATA z
z CLEARED! z
z
z
NORMAL MODE
0.

Or, to cancel the operation, press e.

Note:
• When corruption of data occurs, the reset procedure may automatically be initiated upon pressing the RESET switch.
• Pressing @ P and 3 y can also clear all memories,
variables, files and data as described above.

32

Chapter 3

Scientific Calculations
NORMAL mode
NORMAL mode is used for standard scientific calculations, and has the
widest variety of functions. Many of the functions described in this chapter
are also available for use in other modes.
Press b 0 to select the NORMAL mode.
• Differential/Integral functions, N-base functions, Solver functions and
Simulation Calculation (ALGB) in this chapter are all performed in the
NORMAL mode.
• In each example of this chapter, press j to clear the display first. If
the FIX, SCI or ENG indicator is displayed, clear the indicator by
selecting ‘NORM1’ from the SET UP menu. Unless specified, set the
angular unit as ‘DEG’. (@ P 0)

Arithmetic operations
Example

Key operations

45+285÷3=

j 45 + 285 z 3 e

18+6
=
15–8

( 18 + 6 ) z
( 15 - 8 ) e

42×(–5)+120=

42 k S 5 + 120 e

3

–3

(5×10 )÷(4×10 )=

5` 3z 4` S
3e

Result

140.
3.428571429
–90.

1250000.

33

Chapter 3: Scientific Calculations

Constant calculations
Example

Key operations

Result

34+57=

34 + 57 e

91.

45+57=

45

e

102.

68×25=

68 k 25 e

1700.

68×40=

40 e

2720.

• In constant calculations, the addend becomes a constant. Subtraction
and division behave the same way. For multiplication, the multiplicand
becomes a constant.
• In constant calculations, constants will be displayed as ∆.

Functions
Example

Key operations

Result

sin60 [°]=

j v 60 e

0.866025403

π
cos — [rad]=
4

@J01$
@ s k 4e

0.707106781

–1

tan 1 [g]=

@J02@y1
e
@P0

50.

• The range of the results of inverse trigonometric functions

DEG
RAD
GRAD

34

θ = sin–1 x, θ= tan–1 x

θ = cos–1 x

–90 ≤ θ ≤ 90

0 ≤ θ ≤ 180

π
π
—
–—
2 ≤θ≤ 2

–100 ≤ θ ≤ 100

0 ≤θ≤π
0 ≤ θ ≤ 200

Chapter 3: Scientific Calculations

Example

Key operations

Result

(cosh 1.5 +
sinh 1.5)2 =

j ( H $ 1.5 +
H v 1.5 ) A e

20.08553692

5
tanh–1— =
7

@>t(5
z 7) e

0.895879734

ln 20 =

i 20 e

2.995732274

log 50 =

l 50 e

1.698970004

e3 =

@ " 3e

20.08553692

101.7 =

@ Y 1.7 e

50.11872336

1
1
—+—=
6
7

6 @ Z + 7@
Ze

0.309523809

8 –3 ×5 =
–2

4

2

8m S 2- 3m
4k 5A e

4=
(123)—

12 m 3 m 4
@Ze

83 =

81 e

1

49 –
3

4

81 =

27 =

4! =

-2024.984375
6.447419591
512.

@ * 49 - 4 @ D
81 e

4.

@ q 27 e

3.

4@ B e

24.

P3 =

10 @ e 3 e

720.

5

C2 =

5@ c 2e

10.

500×25%=

500 k 25 @ %

125.

120÷400=?%

120 z 400 @ %

30.

500+(500×25%)=

500 + 25 @ %

625.

400–(400×30%)=

400 - 30 @ %

280.

10

35

Chapter 3: Scientific Calculations

Math menu Functions
Other functions are available on this calculator besides the first and second
functions on the key pad. These functions are accessed using the math
function menu. The math menu has different contents for each mode.
Press I to display the math menu. In the NORMAL mode, you can recall
the following functions.

 0: –10100 < x log y < 100
• y = 0: 0 < x < 10100
• y < 0: x = n
1
(0 < l x l < 1: —
= 2n–1, x =/ 0)*,
x
–10100 < x log | y | < 100
1
x

• y > 0: –10100 < — log y < 100 (x =/ 0)
x __
√y

• y = 0: 0 < x < 10100
• y < 0: x = 2n–1
1
(0 < | x | < 1 : — = n, x =/ 0)*,
1
x

x

–10100 < — log | y | < 100

124

Appendix

Function
ex
10x
sinh x, cosh x,
tanh x
sinh–1 x
cosh–1 x
tanh–1 x
x2
x3
__
√x
x–1
n!
nPr

nCr

Dynamic range
–10100 < x ≤ 230.2585092
–10100 < x < 100
| x | ≤ 230.2585092
| x | < 1050
1 ≤ x < 1050
|x|<1
| x | < 1050
| x | < 2.15443469 × 1033
0 ≤ x < 10100
| x | < 10100 (x ≠ 0)
0 ≤ n ≤ 69*
0 ≤ r ≤ n ≤ 9999999999*
n!
—— < 10100
(n-r)!

0 ≤ r ≤ n ≤ 9999999999*
0 ≤ r ≤ 69
n!
—— < 10100
(n-r)!

↔DEG, D°M’S

0°0’0.00001” ≤ | x | < 10000°

x, y → r, θ

x2 + y2 < 10100
0 ≤ r < 10100
DEG: | θ | < 1010

r, θ → x, y

DRG
(A+Bi)+(C+Di)
(A+Bi)–(C+Di )
(A+Bi) ×(C+Di)

(A+Bi)÷(C+Di)

π
180
10
GRAD : | θ | < —
× 1010
9

RAD:

| θ | < —– × 1010

DEG→RAD, GRAD→DEG: | x | < 10100
π
2

RAD→GRAD: | x | < — × 1098
| A + C | < 10100, | B + D | < 10100
| A – C | < 10100, | B – D | < 10100
(AC – BD) < 10100
(AD + BC) < 10100
AC + BD
< 10100
C2 + D2
BC – AD
< 10100
C2 + D2
C2 + D2 =/ 0

125

Appendix

Function
→DEC
→BIN
→PEN
→OCT
→HEX
AND
OR
XOR
XNOR

Dynamic range
DEC : | x | ≤ 9999999999
BIN : 1000000000 ≤ x ≤ 1111111111
0 ≤ x ≤ 111111111
PEN : 2222222223 ≤ x ≤ 4444444444
0 ≤ x ≤ 2222222222
OCT : 4000000000 ≤ x ≤ 7777777777
0 ≤ x ≤ 3777777777
HEX : FDABF41C01 ≤ x ≤ FFFFFFFFFF
0 ≤ x ≤ 2540BE3FF
: 1000000000 ≤ x ≤ 1111111111
0 ≤ x ≤ 111111111
PEN : 2222222223 ≤ x ≤ 4444444444
0 ≤ x ≤ 2222222221
OCT : 4000000000 ≤ x ≤ 7777777777
0 ≤ x ≤ 3777777777
HEX : FDABF41C01 ≤ x ≤ FFFFFFFFFF
0 ≤ x ≤ 2540BE3FE
BIN : 1000000001 ≤ x ≤ 1111111111
0 ≤ x ≤ 111111111
PEN : 2222222223 ≤ x ≤ 4444444444
0 ≤ x ≤ 2222222222
OCT : 4000000001 ≤ x ≤ 7777777777
0 ≤ x ≤ 3777777777
HEX : FDABF41C01 ≤ x ≤ FFFFFFFFFF
0 ≤ x ≤ 2540BE3FF
BIN

NOT

NEG

* n, r: integer

Memory usage
The amounts of memory the calculator uses for variables, programs and
equations are shown below.
Variables
Each variable uses 1 byte, and each local variable uses 9 bytes to store
its value.
Programs
Creating a new program uses 32 bytes of memory irrespective of the
length of its name.
Each line in a program uses 3 bytes plus the number of characters or
commands on the line (each character or command uses 1 byte). For
example, the two lines of the program shown below use 60 bytes.

126

Appendix

Management

Characters,
commands and
variables

For value
of local
variables

Total

Program title
If A=0 Goto ABC
A¡=A+1

32 bytes
3 bytes
3 bytes

—
8 bytes
5 bytes

—
—
9 bytes

32 bytes
11 bytes
17 bytes

Total consumption

38 bytes

13 bytes

9 bytes

60 bytes

Filing Equation functions
Each stored equation uses 30 bytes plus the number of characters or
commands.

Priority levels in calculations
Operations are performed according to the following priority:

 Fractions (1ı4, etc.)
 ∠ , engineering prefixes
 Functions preceded by their argument (x−1, x2, n!, etc.)
 Yx , x
 Implied multiplication of a memory value (2Y, etc.)
 Functions followed by their argument (sin, cos, (–), etc.)
 Implied multiplication of a function (2sin30, etc.)
 nCr, nPr
×, ÷
+, −
AND
OR, XOR, XNOR
=, M+, M−, ⇒M, 왘DEG, 왘RAD, 왘GRAD, DATA, CD, →rθ, →xy,
and other calculation ending instructions
• If parentheses are used, the parenthesized calculations have precedence
over the other calculations.

127

Appendix

Specifications
Model:

EL-5230/5250

Display type:

[14 characters and 2 exponents] × 3 rows

Dot matrix characters:

5 × 7 dots /character

Number of display digits:

10-digit mantissa + 2-digit exponent

Input ranges:

±10-99 to ±9.999999999 × 1099 and 0.
(up to 10-digit mantissa)

Number of internal
calculation digits:

14-digit mantissa

Pending operations:

24 calculations 10 numeric values (5 numeric
values in the CPLX modes)

Calculation functions:

Calculations (four basic arithmetic
operations, calculations with parentheses,
memory calculations, function calculations,
etc.), differential/integral functions, binary/
pental/octal/decimal/hexadecimal operations,
solver functions, simulation calculations,
complex number calculations, etc.

Statistical calculations:

One-variable statistics, two-variable statistics,
normal probability calculations, etc.

Equation solvers:

Simultaneous linear equations, and
quadratic/cubic equation solvers.

Programming function:

New programming, running a program, and
editing a program and deleting a program.

Option menu:

LCD contrast, memory check and data
deletion

Memory capacity:

[EL-5250] 4,096 bytes (user area)
[EL-5230] 1,280 bytes (user area)

Power source:

3 V (DC):
Lithium battery (CR 2032) × 2

Auto power off:

After approximately 10 minutes

Power consumption:

0.002 W

Operating temperature:

0°C – 40°C (32°F – 104°F)

Operating time:

Approximately 1,800 hours* (at 25°C (77°F),
assuming each hour consists of 5 minutes of
continuous operation and 55 minutes of
display time).

128

Appendix

Dimensions:

79.6 mm (W) × 154.5 mm (D) × 15.2 mm (H)
3-1/8” (W) × 6-3/32” (D) × 19/32” (H)

Weight:

Approx. 97 g (0.22 lb) (including batteries,
but not including hard case)

Accessories:

2 lithium batteries (installed), operation
manual, quick reference card and hard case

* This value may vary according to the way the calculator is used and other
factors.

For More Information about Scientific Calculators
Visit our Web site.
http://sharp-world.com/calculator/
In Europe:
This equipment complies with the requirements of Directive 89/336/EEC as amended by 93/
68/EEC.
Dieses Gerät entspricht den Anforderungen der EG-Richtlinie 89/336/EWG mit Änderung 93/
68/EWG.
Ce matériel répond aux exigences contenues dans la directive 89/336/CEE modifiée par la
directive 93/68/CEE.
Dit apparaat voldoet aan de eisen van de richtlijn 89/336/EEG, gewijzigd door 93/68/EEG.
Dette udstyr overholder kravene i direktiv nr. 89/336/EEC med tillæg nr. 93/68/EEC.
Quest’ apparecchio è conforme ai requisiti della direttiva 89/336/EEC come emendata dalla
direttiva 93/68/EEC.

                    
   89/336/,                   93/68/
.
Este equipamento obedece às exigências da directiva 89/336/CEE na sua versão corrigida pela
directiva 93/68/CEE.
Este aparato satisface las exigencias de la Directiva 89/336/CEE modificada por medio de la
93/68/CEE.
Denna utrustning uppfyller kraven enligt riktlinjen 89/336/EEC så som kompletteras av 93/68/
EEC.
Dette produktet oppfyller betingelsene i direktivet 89/336/EEC i endringen 93/68/EEC.
Tämä laite täyttää direktiivin 89/336/EEC vaatimukset, jota on muutettu direktiivillä 93/68/
EEC.
чÌÌÓ ÛÒÚÓÈÒÚ‚Ó ÒÓÓÚ‚ÂÚÒÚ‚ÛÂÚ Ú·ӂ‡ÌËflÏ ‰ËÂÍÚË‚˚ 89/336/EEC Ò Û˜ÂÚÓÏ
ÔÓÔ‡‚ÓÍ 93/68/EEC.
Ez a készülék megfelel a 89/336/EGK sz. EK-irányelvben és annak 93/68/EGK sz.
módosításában foglalt követelményeknek.
Tento pfiístroj vyhovuje poÏadavkÛm smûrnice 89/336/EEC v platném znûní 93/68/EEC.

129

EL-5230/EL-5250
04LGK (TINSE0796EHZZ)
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA

PROGRAMMABLE SCIENTIFIC CALCULATOR

SHARP CORPORATION

®

EL-5230
EL-5250

PROGRAMMABLE SCIENTIFIC
CALCULATOR
OPERATION MANUAL



File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
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Modify Date                     : 2005:08:04 11:36:39+02:00
Create Date                     : 2004:11:19 09:22:05+09:00
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Keywords                        : EL-5230, EL-5250, EL5230, EL5250, Calculator
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Mod Date                        : 2005:08:04 11:36:39+02:00
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Title                           : EL-5230/5250 Operation-Manual GB
Description                     : Operation Manual, English
Creator                         : SEA-Neumeister