EL-501W
SCIENTIFIC CALCULATOR
OPERATION MANUAL
MODEL
ENGLISH
INTRODUCTION
Thank you for purchasing the SHARP Scientific Calculator
Model EL-501W.
About the
calculation examples (including some formulas
and tables)
, refer to the reverse side of this English manual.
Refer to the number on the right of each title on the
manual for use
.
After reading this manual, store it in a convenient location for
future reference.
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 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.
SHARP will not be liable nor responsible for any inciden-
tal 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.
♦
Press the RESET switch (on the back), with the tip of a
ball-point pen or similar object, only in the following cases.
Do not use an object with a breakable or sharp tip. Note
that pressing the RESET switch erases all data stored in
memory.
• When using for the first time
• After replacing the batteries
• To clear all memory contents
• When an abnormal condition occurs and all keys are
inoperative.
If service should be required on this calculator, use only a
SHARP servicing dealer, SHARP approved service facility,
or SHARP repair service where available.
Hard Case
(During actual use not all symbols are displayed at the same time.)
If the value of mantissa does not fit within the range
±0.000000001 – ±9999999999, the display changes to scien-
tific notation. The display mode can be changed according to
the purpose of the calculation.
2ndF
:
Appears when
@
is pressed, indicating that the
functions shown in orange are enabled.
HYP
:
Indicates that
h
has been pressed and the hy-
perbolic functions are enabled. If
@
H
are
pressed, the symbols “
2ndF HYP
” appear, indicat-
ing that inverse hyperbolic functions are enabled.
DEG/RAD/GRAD:
Indicates angular units and changes each
time
G
is pressed. The default setting is DEG.
( )
:
Appears when a calculation with parentheses is per-
formed by pressing
(
.
BIN
:
Indicates that
@
ê
has been pressed.
Binary system mode is selected.
OCT
:
Indicates that
@
î
has been pressed.
Octal system mode is selected.
HEX
:
Indicates that
@
ì
has been pressed.
Hexadecimal system mode is selected.
CPLX
:
Indicates that
@
π
has been pressed.
Complex number mode is selected.
STAT
:
Indicates that
@
Æ
has been pressed.
Statistics mode is selected.
M
:
Indicates that a numerical value is stored in the
independent memory.
E
:
Appears when an error is detected.
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA
04AGK (TINSE0496THZZ)
BEFORE USING THE CALCULATOR
Key Notation Used in this Manual
In this manual, key operations are described as follows:
To specify A (HEX) : A
To specify
π
:
@
V
To specify E
x
p
:
E
Functions that are printed in orange above the key require
@
to be pressed first before the key. Numbers are not
shown as keys, but as ordinary numbers.
Power On and Off
Press
ª
to turn the calculator on, and
F
to turn it off.
Clearing Numbers
• Press
ª
to clear the entries except for a numerical
value in the independent memory and statistical data.
• Press
æ
to clear the number entered prior to use of
function key.
• In case of one digit correction of the entered number, press
ø
(right shift key).
INITIAL SET UP
Mode Selection
Normal mode:
ª
Used to perform arithmetic operations and function calcula-
tions.
BIN
,
OCT
,
HEX
,
CPLX
and
STAT
are not displayed.
Binary, Octal, Decimal, or Hexadecimal system mode:
@ê
,
@î
,
@í
or
@ì
Complex number mode:
@π
Used to perform arithmetic operations with complex numbers.
To clear this mode, press
@π
.
Statistics mode:
@Æ
Used to perform statistical calculations. To clear this mode,
press
@Æ
.
When executing mode selection, statistical data will be cleared
even when reselecting the same mode.
• By pressing
F
or Automatic power off function, the
mode is cleared and returned to the normal mode.
Priority Levels in Calculation
This calculator performs operations according to the following
priority:
1
Functions such as sin,
x
2
, and %
2
y
x
,
x
¿
y
3
×
,
÷
4
+, –
5
=, M+ and other calculation ending instruction
• Calculations which are given the same priority level are
executed in sequence.
• If parentheses are used, parenthesized calculations have
precedence over any other calculations.
• Parentheses can be continuously used up to 15 times un-
less pending calculations exceed 4.
DEG
(
°
)
GRAD
(g)
RAD
100000÷3=
[Floating point]
ª
100000
/
3
=
33333.33333
[TAB set to 2]
@i
2
33333.33
→
[Scientific notation]
∞
3.33
04
→
[Floating point]
∞@i.
33333.33333
• If the value for floating point system does not fit in the
following range, the calculator will display the result using
scientific notation system:
0.000000001
≤
|
x
|
≤
9999999999
Determination of the Angular Unit
In this calculator, the following three angular units (degrees,
radians, and grads) can be specified.
Press
G
(rad)
Selecting the Display Notation and Decimal Places
• When calculation result is displayed in the floating point
system, pressing
∞
displays the result in the scientific
notation system.
Pressing
∞
once more displays the result again in the
floating point system.
• Pressing
@i
and any value between 0 and 9 speci-
fies the number of decimal places in the calculation result.
To clear the setting of decimal places, press
@
i
.
.
SCIENTIFIC CALCULATIONS
• Calculate in the normal mode.
• In each example, press
ª
to clear the display.
Arithmetic Operations
• The closing parenthesis
)
just before
=
or
;
may be omitted.
• When entering only a decimal place, it is not necessary to
press
0
before
.
.
Random Numbers
A pseudo-random number with three significant digits can be
generated by pressing
@
`
. Random number gen-
eration is not possible when binary/octal/hexadecimal sys-
tem mode is set.
Angular Unit Conversions
Each time
@
g
are pressed, the angular unit changes
in sequence.
Memory Calculations
This calculator has one independent memory (M). It is avail-
able in the normal mode and binary, octal, hexadecimal
system mode.
• The independent memory is indicated by the three keys:
O
,
R
,
;
.
Before starting a calculation, clear the memory by press-
ing
ª
and
O
.
• A value can be added to or subtracted from an existing
memory value. When subtracting a number from the
memory, press
±
and
;
.
• The contents of the memory are retained even when the
calculator is turned off. A value stored in memory will thus
remain until it is changed or until the batteries run out.
Chain Calculations
This calculator allows the previous calculation result to be
used in the following calculation.
The previous calculation result will not be recalled after en-
tering multiple instructions.
Time, Decimal and Sexagesimal Calculations
This calculator performs decimal-to-sexagesimal conversion
and sexagesimal-to-decimal conversion. In addition, the four
basic arithmetic operations and memory calculations can be
carried out using the sexagesimal system.
Notation for sexagesimal is as follows:
123.404080
degree
second
minute
Note: When the calculation or conversion result is con-
verted, a residual may occur.
Constant Calculations
• In the constant calculations, the addend becomes a con-
stant. Subtraction and division are performed in the same
manner. For multiplication, the multiplicand becomes a
constant.
Functions
• Refer to the calculation examples of each function.
• For most calculations using functions, enter numerical
values before pressing the function key.
STATISTICAL CALCULATIONS
Press
@
Æ
to select statistics mode.
The following statistics can be obtained:
x
Mean of samples (
x
data)
sx
Sample standard deviation (
x
data)
σ
x
Population standard deviation (
x
data)
n
Number of samples
Σ
x
Sum of samples (
x
data)
Σ
x
2
Sum of squares of samples (
x
data)
Data Entry and Correction
Entered data are kept in memory until
@
Æ
or
F
are pressed. Before entering new data, clear the memory
contents.
[Data Entry]
Data
k
Data
*
frequency
k
(To enter multiples of the same
data)
[Data Correction]
Correction prior to pressing
k
:
Delete incorrect data with
ª
.
Correction after pressing
k
:
Reenter the data to be corrected and press
@
J
.
• The number displayed after pressing
k
or
@
J
during data entry or correction is the number of samples
(
n
).
Statistical Calculation Formulas
In the statistical calculation formulas, an error will occur when:
• the absolute value of the intermediate result or calculation
result is equal to or greater than 1
×
10
100
.
• the denominator is zero.
• an attempt is made to take the square root of a negative
number.
BINARY, OCTAL, DECIMAL, AND
HEXADECIMAL OPERATIONS (N-BASE)
This calculator can perform the four basic arithmetic opera-
tions, calculations with parentheses and memory calcula-
tions using binary, octal, decimal, and hexadecimal num-
bers.
When performing calculations in each system, first set the
calculator in the desired mode before entering numbers.
It can also perform conversions between numbers expressed
in binary, octal, decimal and hexadecimal systems.
Conversion to each system is performed by the following
keys:
Ï
ê
: Converts to the binary system. “BIN” appears.
Ï
î
: Converts to the octal system. “OCT” appears.
Ï
ì
: Converts to the hexadecimal system. “HEX”
appears.
Ï
í
: Converts to the decimal system. “BIN”, “OCT”,
and “HEX” disappear from the display.
Conversion is performed on the displayed value when these
keys are pressed.
Note: In this calculator, the hexadecimal numbers A – F are
entered by pressing
E
,
Ñ
,
⁄
,
´
,
I
,
and
l
, and displayed as follows:
A
→
å
, B
→
∫
, C
→
ç
, D
→
∂
, E
→
é
, F
→
ƒ
In the binary, octal, and hexadecimal systems, fractional
parts cannot be entered. When a decimal number having a
fractional part is converted into a binary, octal, or hexadeci-
mal number, the fractional part will be truncated. Likewise,
when the result of a binary, octal, or hexadecimal calculation
includes a fractional part, the fractional part will be trun-
cated. In the binary, octal, and hexadecimal systems, nega-
tive numbers are displayed as a complement.
F
A
B
C
D
E
COMPLEX NUMBER CALCULATIONS
To carry out addition, subtraction, multiplication, and division
using complex numbers, press
@π
to select the com-
plex number mode.
• A complex number is represented in the a + bi format. The
“a” is the real part while the “bi” is the imaginary part.
When inputting the real part, after inputting the number
press
a
. When inputting the imaginary part, after in-
putting the number press
b
. To obtain the result press
=
.
• Immediately after completing calculation, you can recall
the value of the real part with
a
, and the value of the
imaginary part with
b
.
• If the complex numbers are represented as polar coordi-
nates, press
@}
after they are input with
a
and
b
.
ERROR AND CALCULATION RANGES
Errors
An error will occur if an operation exceeds the calculation
ranges, or if a mathematically illegal operation is attempted.
In the case of an error, the display will show “E”.
An error can be cleared by pressing
ª
.
Calculation Ranges
•
Within the ranges specified, this calculator is accurate to
±1 of the least significant digit of the mantissa. However, a
calculation error increases in continuous calculations due
to accumulation of each calculation error. (This is the
same for
y
x
,
x
¿
,
e
x
,
ln, etc., where continuous calculations
are performed internally.)
Additionally, a calculation error will accumulate and
become larger in the vicinity of inflection points and
singular points of functions.
• Calculation ranges
±10
-99
~ ±9.999999999
×
10
99
and 0.
If the absolute value of an entry or a final or intermediate
result of a calculation is less than 10
–99
, the value is consid-
ered to be 0 in calculations and in the display.
BATTERY REPLACEMENT
Notes on Battery Replacement
Improper handling of batteries can cause electrolyte leakage
or explosion. Be sure to observe the following handling rules:
• Replace both batteries at the same time.
• Do not mix new and old batteries.
• Make sure the new batteries are the correct type.
• When installing, orient each battery properly as indicated in
the calculator.
• Batteries are factory-installed before shipment, and may be
exhausted before they reach the service life stated in the
specifications.
When to Replace the Batteries
If the display has poor contrast, the batteries require replace-
ment.
Caution
• Fluid from a leaking battery accidentally entering an eye could
result in serious injury. Should this occur, wash with clean
water and immediately consult a doctor.
• Should fluid from a leaking battery come in contact with your
skin or clothes, immediately wash with clean water.
• If the product is not to be used for some time, to avoid damage
to the unit from leaking batteries, remove them and store in a
safe place.
• Do not leave exhausted batteries inside the product.
• Do not fit partially used batteries, and be sure not to mix
batteries of different types.
• Keep batteries out of the reach of children.
• Exhausted batteries left in the calculator may leak and
damage the calculator.
• Explosion risk may be caused by incorrect handling.
• Do not throw batteries into a fire as they may explode.
Replacement Procedure
1. Turn the power off by pressing
F
.
2. Loosen both screws and remove the battery cover. (Fig. 1)
Fig. 1
Fig. 2
3. Remove the used batteries then replace with two fresh
batteries with the positive sides (+) facing up. (Fig. 2)
4. Replace the battery cover and screws.
5. Press
ª
.
• Make sure that the display appears as shown below. If the
display does not appear as shown, reinstall the batteries
and check the display once again.
Automatic Power Off Function
This calculator will turn itself off to save battery power if no
key is pressed for approximately 8 minutes.
SPECIFICATIONS
Calculations:
Scientific calculations, binary/octal/
hexadecimal number calculations,
complex number calculations, sta-
tistical calculations, etc.
Internal calculations:
Mantissas of up to 10 digits
Pending operations:
4 calculations
Power source:
3V
¶
(DC):
Alkaline batteries (LR44)
×
2
Power consumption:
0.0005 W
Operating time:
Approx. 3000 hours
when continuously displaying 55555.
at 25°C (77°F).
Varies according to use and other
factors.
Operating temperature:
0°C – 40°C (32°F – 104°F)
External dimensions:
78.6 mm (W)
×
144 mm (D)
×
11.6
mm (H)
3-3/32” (W)
×
5-21/32” (D)
×
15/32”
(H)
Weight:
Approx. 75 g (0.17 lb)
(Including batteries)
Accessories:
Batteries
×
2 (installed), operation
manual, quick reference card and
hard case
FOR MORE INFORMATION ABOUT
SCIENTIFIC CALCULATOR
Visit our Web site.
http://sharp-world.com/calculator/
SHARP CORPORATION
Coordinate Conversions
• Before performing a calculation, select the angular unit.
↔
Rectangular coord.
Polar coord.
P (
x
,
y
)
X
Y
0
y
x
P (
r
,
θ
)
X
Y
0
r
θ
DISPLAY
←
Symbol
Mantissa
Exponent
• Floating point system
• Scientific notation system
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
1 2 3 4 5 6 7 8 9 0 . ,
