INTRODUCTION Thank you for purchasing the SHARP Scientiﬁ c Calculator Model
EL509W/531W/531WG/531WH.
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.
Note: Some of the models described in this manual may not be
available in some countries.
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 exces
sively humid or dusty environments.
• Since this product is not waterproof, do not use it or store it
where ﬂ uids, 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 ﬁ re.
• Keep batteries out of the reach of children.
• This product, including accessories, may change due to up
grading 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 speciﬁ ed 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.
♦
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 ﬁ rst time
• After replacing the batteries
• To clear all memory contents
• When an abnormal condition occurs and all keys are inop
erative.
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 DISPLAY • During actual use, not all symbols are displayed at the same
time.
• Certain inactive symbols may appear visible when viewed
from a far off angle.
• Only the symbols required for the usage under instruction are
shown in the display and calculation examples of this manual.
PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA
10EGK (TINSE1377EH01)
SCIENTIFIC CALCULATOR OPERATION MANUAL
EL509W EL531W EL531WG EL531WH MODEL Front side_English manual
Exponent
Equation
→
Display
Mantissa
←
Symbol
: Appears when the entire equation cannot be displayed.
Press
<
/
>
to see the remaining (hidden) section.
: Indicates that data can be visible above/below the screen.
These indications may appear when menu, multiline play
back, and statistics data are displayed. Press
[
/
]
to scroll up/down the view.
2ndF : Appears when
@
is pressed, indicating that the func
tions shown in orange are enabled.
HYP : Indicates that
h
has been pressed and the hyperbolic
functions are enabled. If
@H
are pressed, the
symbols “2ndF HYP ” appear, indicating that inverse hy
perbolic functions are enabled.
ALPHA
: Indicates that
K
(ST A T V AR),
O
or
R
has been
pressed, and entry (recall) of memor y contents and recall
of statistics can be performed.
FIX/SCI/ENG: Indicates the notation used to display a v alue and
changes by SET UP menu.
DEG/RAD/GRAD: Indicates angular units and changes each time
G
is pressed.
: Appears when statistics mode is selected.
M : Indicates that a numerical value is stored in the independ
ent memory .
BEFORE USING THE CALCULATOR Key Notation Used in this Manual In this manual, ke y operations are descr ibed as f ollows:
T o specify
e
x
:
@e
T o specify ln :
I
T o specify F :
Kü
Functions that are printed in orange above the key require
@
to be pressed ﬁ rst before the key. When you specify the memory,
press
K
ﬁ rst. Numbers for input value 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 the Entry and Memories Clearing methods are described in the table as follows:
Clearing Entry M
*
1
AF , X,Y
*
2
S TAT
*
4
operation (Displa y) ANS
*
3
S TAT V A R
*
5
ª
× × ×
@c
×
@∏ 00
*
6
@∏ 10
*
7
RESET switch
: Clear
×
: Retain
*
1
Independent memor y M.
*
2
T emporar y memory AF , X and Y .
*
3
Last answer memory .
*
4
Statistical data (entered data).
*
5
¯ x
,
sx
,
σ
x
,
n
,
Σ
x
,
Σ
x
2
,
¯ y
,
sy
,
σ
y
,
Σ
y
,
Σ
y
2
,
Σ
xy
,
r
,
a
,
b
,
c
.
*
6
All v ariables are cleared. See ‘About the Memory clear key’ for
details.
*
7
This key combination functions the same as the RESET s witch.
See ‘About the Memor y clear ke y’ for details.
[About the Memory clear key]
Press
@∏
to display the men u.
• T o clear all variables (M, AF , X, Y , ANS, ST A T V AR), press
00
or
0®
.
• T o RESET the calculator , press
10
or
1®
.
The RESET oper ation will erase all data stored in memory , and
restore the calculator's default setting.
Entering and Correcting the Equation [Cursor keys]
• Press
<
or
>
to move the cursor. You can also return to
the equation after getting an answer by pressing
>
(
<
).
See the next section for using the
[
and
]
keys.
• In the SET UP menu and other locations, use the
<
or
>
ke y to mov e the ﬂ ashing cursor , then press
®
(
=
ke y).
If you need to scroll up/down the vie w, use the
[
or
]
key .
[Insert mode and Overwrite mode in the Equation display]
• This calculator has two editing modes: insert mode (default),
and overwrite mode. Pressing
@‘
switches between the
two modes. A triangular cursor indicates that an entry will be
inserted at the cursor, while the rectangular cursor indicates to
overwrite preexisting data as you make entries.
• To insert a number in the insert mode, move the cursor to the
place immediately after where you wish to insert, then make a
desired entry. In the overwrite mode, data under the cursor will
be overwritten by the number you enter.
• This mode setting will be retained until the next RESET operation
is executed.
[Deletion key]
•
To delete a number/function, move the cursor to the number/func
tion you wish to delete, then press
d
. If the cursor is located at
the right end of an equation, the
d
ke y will function as a back
space ke y .
Multiline Playback function
This calculator is equipped with a function to recall previous equa
tions in the normal mode. Equations also include calculation ending
instructions such as “=” and a maximum of 142 characters can be
stored in memory. When the memory is full, stored equations are
deleted in the order of the oldest ﬁ rst. Pressing
[
will display
the previous equation and the answer. Further pressing
[
will
display preceding equations (after returning to the previous equa
tion, press
]
to view equations in order). In addition,
@[
can be used to jump to the oldest equation.
• To edit an equation after recalling it, press
>
(
<
).
• To edit the displayed equation, press
>
(
<
) immediately
after obtaining a calculation answer.
• The multiline memory is cleared by the following operations:
@c
,
@F
(including the Automatic Power Off fea
ture), mode change, memory clear (
@∏
), RESET,
@
`
,
K
(
R
)
?
, constant calculation, chain calcula
tion, angle unit conversion, coordinate conversion, Nbase con
version, numerical value storage to the temporary memories and
independent memory, and input/deletion of statistical data.
Priority Levels in Calculation This calculator performs operations according to the following priority:
Q
Fractions (1
l
4, etc.)
W
Functions preceded by their argument
(x
1
, x
2
, n!, etc.)
E
Y
x
,
x
¿
R
Implied multiplication of a memory
value (2Y, etc.)
V
Functions followed by their argument (sin, cos,
etc.)
Y
Implied multiplication of a function (2sin30, etc.)
U
n
C
r
,
n
P
r
I
×
,
÷
O
+, –
P
AND
{
OR, XOR, XNOR
}
=, M+, M–,
⇒
M,

DEG,

RAD,

GRAD, DATA, CD,
→
r
θ
,
→
xy and other calcula
tion ending instructions
• If parentheses are used, parenthesized calculations have prec
edence over any other calculations.
INITIAL SET UP Mode Selection Normal mode (NORMAL):
m0
Used to perform arithmetic operations and function calculations.
Statistics mode (ST A T):
m1
Used to perform statistical calculations.
When ex ecuting mode selection, temporar y memories, statistical
variables , statistical data and last answ er memory will be cleared
ev en when reselecting the same mode.
SET UP menu Press
”
to display the SET UP menu.
• A menu item can be selected by:
• moving the ﬂ ashing cursor by using
><
, then press
®
(
=
key), or
• pressing the number key corresponding to the menu item number.
• If
or
is displayed on the screen, press
[
or
]
to
view the previous/next menu screen.
• Press
ª
to exit the SET UP menu.
[Selecting the Display Notation and Decimal Places]
The calculator has four display notation systems (Floating point,
Fixed decimal point, Scientiﬁ c notation and Engineering notation)
for displaying calculation results.
•
When the FIX, SCI, or ENG symbol is displayed, the number of
decimal places (TAB) can be set to any value between 0 and 9.
Displayed values will be reduced to the corresponding number of
digits.
• If a ﬂ oating point number does not ﬁ t in the speciﬁ ed range,
the calculator will display the result using the scientiﬁ c notation
(exponential notation) system. See ‘Setting the Floating Point
Numbers System in Scientiﬁ c Notation’ for details.
• Press
”
, followed by
0
, to display the following sub
menu:
[Setting the Floating Point Numbers System in Scientiﬁ c Notation]
The calculator has two settings for displaying a ﬂ oating point number:
NORM1 (default setting) and NORM2. In each display setting, a
number is automatically displayed in scientiﬁ c notation outside a
preset range:
• NORM1: 0.000000001
9999999999
• NORM2: 0.01
9999999999
100000÷3=
[Floating point (NORM1)]
ª
100000
/
3
=
33’333.33333
→
[Fixed decimal point]
”00
33’333.33333
[T AB set to 2]
”1
2 33’333.33
→
[SCIentiﬁ c notation]
”01
3.33
×
10
04
→
[ENGineering notation]
”02
33.33
×
10
03
→
[Floating point (NORM1)]
”03
33’333.33333
3÷1000=
[Floating point (NORM1)]
ª
3
/
1000
=
0.003
→
[Floating point (NORM2)]
”04
3.
×
10
–03
→
[Floating point (NORM1)]
”03
0.003
→
]
Determination of the Angular Unit In this calculator, the following three angular units (degrees,
radians, and grads) can be speciﬁ ed.
DEG (° )
GRAD (g) RAD
Press G
(rad)
SCIENTIFIC CALCULATIONS • Press
m0
to select the normal mode.
• In each example, press
ª
to clear the display. And if the
FIX, SCI, or ENG indicator is displayed, clear the indicator by
selecting ‘NORM1’ from the SET UP menu.
Arithmetic Operations
• The closing parenthesis
)
just before
=
or
;
may
be omitted.
Constant Calculations
• In constant calculations, the addend becomes a constant.
Subtraction and division are performed in the same manner.
For multiplication, the multiplicand becomes a constant.
• When performing calculations using constants, constants will
be displayed as K.
Functions
• Refer to the calculation examples of each function.
• Before starting calculations, specify the angular unit.
Random Function The Random function has four settings for use in the normal or
statistics mode. (This function cannot be selected while using the
NBase function.) Press
ª
to exit.
• The generated pseudorandom number series is stored in
memory Y. Each random number is based on a number series.
[Random Numbers]
A pseudorandom number, with three signiﬁ cant digits from 0 up
to 0.999, can be generated by pressing
@`0®
.
To generate the next random number, press
®
.
[Random Dice]
To simulate a dierolling, a random integer between 1 and 6 can
be generated by pressing
@`1®
. To generate
the next random dice number, press
®
.
[Random Coin]
To simulate a coin ﬂ ip, 0 (head) or 1 (tail) can be randomly
generated by pressing
@`2®
. To generate the
next random coin number, press
®
.
[Random Integer]
An integer between 0 and 99 can be generated randomly by
pressing
@`3®
. To generate the next random
integer number, press
®
.
Angular Unit Conversions
Each time
@g
are pressed, the angular unit changes in
sequence.
Memory Calculations
This calculator has 8 temporary memories (AF, X and Y), one
independent memory (M) and one last answer memory (ANS).
The independent memory and temporary memories are only avail
able in the normal mode.
[Temporary memories (AF, X and Y)]
Press
O
and a corresponding variable key to store a value in
memory.
Press
R
and a corresponding variable key to recall a value
from the memory.
To place a variable in an equation, press
K
, followed by a
desired variable key.
[Independent memory (M)]
In addition to all the features of temporary memories, a value can
be added to or subtracted from an existing memory value.
Press
ªOM
to clear the independent memory (M).
[Last answer memory (ANS)]
The calculation result obtained by pressing
=
or any other
calculation ending instruction is automatically stored in the last
answer memory.
Note:
• Calculation results from the functions indicated below are au
tomatically stored in memories X or Y. For this reason, when
using these functions, be careful with the use of memories X
and Y.
• Random function ................. Y memory
•
→
r
θ
,
→
xy
.............................. X memory (
r
or
x
),
Y memory (
θ
or
y
)
• Temporary memories and last answer memory are cleared
even when the same mode is reselected.
• Use of
R
or
K
will recall the value stored in memory
using up to 14 digits.
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 enter
ing multiple instructions.
• In the case of utilizing postﬁ x functions (
¿
, sin, etc.), you can
perform a chain calculation even when the previous calculation
result is cleared by the use of the
ª
key.
Fraction Calculations
This calculator performs arithmetic operations and memory
calculations using fractions, and conversion between a decimal
number and a fraction.
• If the number of digits to be displayed is greater than 10, the
number is converted to and displayed as a decimal number.
Binary, Pental, Octal, Decimal, and Hexadecimal Operations (NBase)
This calculator can perform conversions between numbers
expressed in binary, pental, octal, decimal and hexadecimal
systems. It can also perform the four basic arithmetic operations,
calculations with parentheses and memory calculations using
binary, pental, octal, decimal, and hexadecimal numbers. In ad
dition, the calculator can carry out the logical operations AND,
OR, NOT, NEG, XOR and XNOR on binary, pental, octal and
hexadecimal numbers.
Conversion to each system is performed by the following keys:
@ê
: Conv er ts to the binary system. “
” appears.
@û
: Conv er ts to the pental system. “ ” appears.
@î
: Conv er ts to the octal system. “
” appears .
@ì
: Conv er ts to the he xadecimal system. “
” appears .
@í
: Con verts to the decimal system. “
”, “ ”, “ ”, and
“
” disappear from the displa y .
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
™
A
,
⁄
B
,
L
C
,
÷
D
,
l
E
, and
I
F
, and displayed as follows:
A
→
ï
, B
→
∫
, C
→
ó
, D
→
ò
, E
→
ô
, F
→
ö
In the binary, pental, octal, and hexadecimal systems, fractional
parts cannot be entered. When a decimal number having a frac
tional part is converted into a binary, pental, octal, or hexadeci
mal number, the fractional part will be truncated. Likewise, when
the result of a binary, pental, octal, or hexadecimal calculation
includes a fractional part, the fractional part will be truncated.
In the binary, pental, octal, and hexadecimal systems, negative
numbers are displayed as a complement.
Time, Decimal and Sexagesimal Calculations
Conversion between decimal and sexagesimal numbers can be
performed. In addition, the four basic arithmetic operations and
memory calculations can be carried out using the sexagesimal
system.
Notation for sexagesimal is as follows:
degree second
minute
Coordinate Conversions
• Before performing a calculation, select the angular unit.
↔
P (x ,y )
X
Y
0
y
x
P (r,
θ
)
X
Y
0
r
θ
• The calculation result is automatically stored in memories X
and Y.
Value of
r
or
x
: X memory
Value of
θ
or
y
: Y memory
Modify Function
In this calculator, calculation results are internally obtained in
scientiﬁ c notation with up to 14 digits for the mantissa. However,
since calculation results are displayed in the form designated by
the display notation and the number of decimal places indicated,
the internal calculation result may differ from that shown in the
display. By using the modify function, the internal value is con
verted to match that of the display, so that the displayed value
can be used without change in subsequent operations.
STATISTICAL CALCULATIONS
Statistical calculations are performed in the statistics mode.
Press
m1
to select the statistics mode. This calculator
performs the seven statistical calculations indicated below. After
selecting the statistics mode, select the desired submode by
pressing the number key corresponding to your choice.
When changing to the statistical submode, press the corre
sponding number key after performing the operation to select the
statistics mode (press
m1
).
Rectangular coord. P olar coord.
0
(SD) : Singlevariable statistics
1
(LINE) : Linear regression calculation
2
(QUAD) : Quadratic regression calculation
3
(EXP) : Exponential regression calculation
4
(LOG) : Logarithmic regression calculation
5
(PWR) : Power regression calculation
6
(INV) : Inverse regression calculation
The following statistics can be obtained for each statistical calcula
tion (refer to the table below):
Singlevariable statistical calculation Statistics of
Q
Linear regression calculation Statistics of
Q
and
W
and, in addition, estimate of
y
for a given
x
(estimate
y
´
) and estimate of
x
for a given
y
(estimate
x
´
)
Exponential regression, Logarithmic regression, Power regression, and Inverse regression calculation Statistics of
Q
and
W
. In addition, estimate of
y
for a given
x
and estimate of
x
for a given
y
. (Since the calculator converts
each formula into a linear regression formula before actual cal
culation takes place, it obtains all statistics, except coefﬁ cients
a
and
b
, from converted data rather than entered data.)
Quadratic regression calculation Statistics of
Q
and
W
and coefﬁ cients
a
,
b
,
c
in the quadratic
regression formula (
y
=
a
+
bx
+
cx
2
). (For quadratic regression
calculations, no correlation coefﬁ cient (
r
) can be obtained.)
When there are two
x
´
values, press
@≠
.
When performing calculations using
a
,
b
and
c
, only one numeric
value can be held.
¯
x
Mean of samples (
x
data)
sx
Sample standard deviation (
x
data)
Q
σ
x
P opulation 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)
¯
y
Mean of samples (
y
data)
sy
Sample standard deviation (
y
data)
σ
y
P opulation standard deviation (
y
data)
Σ
y
Sum of samples (
y
data)
W
Σ
y
2
Sum of squares of samples (
y
data)
Σ
xy
Sum of products of samples (
x
,
y
)
r
Correlation coefﬁ cient
a
Coefﬁ cient of regression equation
b
Coefﬁ cient of regression equation
c
Coefﬁ cient of quadratic reg ression equation
• Use
K
and
R
to perform a ST A T variable calculation.
Data Entry and Correction
Entered data are kept in memory until
@c
are pressed or
mode selection. Before entering new data, clear the memory con
tents.
[Data Entry]
Singlevariable data
Data
k
Data
&
frequency
k
(To enter multiples of the same
data)
Twovariable data
Data
x
&
Data
y
k
Data
x
&
Data
y
&
frequency
k
(To enter multiples
of the same data
x
and
y
.)
• Up to 100 data items can be entered. With the singlevariable
data, a data item without frequency assignment is counted as
one data item, while an item assigned with frequency is stored
as a set of two data items. With the twovariable data, a set of
data items without frequency assignment is counted as two data
items, while a set of items assigned with frequency is stored as
a set of three data items.
[Data Correction]
Correction prior to pressing
k
immediately after a data entry:
Delete incorrect data with
ª
, then enter the correct data.
Correction after pressing
k
:
Use
[]
to display the data previously entered.
Press
]
to display data items in ascending (oldest ﬁ rst)
order. To reverse the display order to descending (latest ﬁ rst),
press the
[
key.
Each item is displayed with ‘
Xn=
’, ‘
Yn=
’, or ‘
Nn=
’ (
n
is the se
quential number of the data set).
Display the data item to modify, input the correct value, then
press
k
. Using
&
, you can correct the values of the
data set all at once.
• When
or
appears, more data items can be browsed by
pressing
[
or
]
.
• To delete a data set, display an item of the data set to delete,
then press
@J
. The data set will be deleted.
• To add a new data set, press
ª
and input the values, then
press
k
.
Statistical Calculation Formulas
T ype Regression formula
Linear
y
=
a
+
bx
Exponential
y
=
a
•
e
bx
Logarithmic
y
=
a
+
b
• ln
x
P ower
y
=
a
•
x
b
Inv erse
y
=
a
+
b
—
Quadratic
y
=
a
+
bx
+
cx
2
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 .
• No solution exists in the quadr atic regression calculation.
ERROR AND CALCULATION RANGES Errors An error will occur if an operation exceeds the calculation ranges,
or if a mathematically illegal operation is attempted. When an error
occurs, pressing
<
(or
>
) automatically moves the cursor
back to the place in the equation where the error occurred. Edit the
equation or press
ª
to clear the equation.
Error Codes and Error Types Syntax error (Error 1):
• An attempt was made to perform an invalid operation.
Ex. 2
@{
Calculation error (Error 2):
• The absolute value of an intermediate or ﬁ nal calculation result
equals or exceeds 10
100
.
• An attempt was made to divide by 0 (or an intermediate calculation
resulted in zero).
• The calculation ranges were exceeded while performing calculations.
Depth error (Error 3):
• The available number of buffers was exceeded. (There are 10 buffers*
for numeric values and 24 buffers for calculation instructions).
*5 buffers in STAT mode.
• Data items exceeded 100 in the statistics mode.
Equation too long (Error 4):
• The equation exceeded its maximum input buffer (142 characters).
An equation must be shorter than 142 characters.
Calculation Ranges
• Within the ranges speciﬁ ed, this calculator is accurate to
±1 of the least signiﬁ cant 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
¿
, n! , e
x
, ln , etc., where continuous calculations are
performed internally.)
Additionally, a calculation error will accumulate and become
larger in the vicinity of inﬂ ection 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 ﬁ nal or intermediate result of
a calculation is less than 10
–99
, the value is considered 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 factoryinstalled before shipment, and may be
exhausted before they reach the service life stated in the speci
ﬁ cations.
Notes on erasure of memory contents
When the battery is replaced, the memory contents are erased.
Erasure can also occur if the calculator is defective or when it is
repaired. Make a note of all important memory contents in case
accidental erasure occurs.
When to Replace the Batteries [EL509W/531W/531WH] If the display has poor contrast, the bat
teries require replacement.
[EL531WG] If the display has poor contrast or nothing appears on
the display even when
ª
is pressed in dim lighting, it is time to
replace the batteries.
Cautions • 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 ﬂ uid 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.
1
x
• Do not ﬁ t 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 ﬁ re as they may explode.
Replacement Procedure 1. Turn the power off by pressing
@F
.
2. Remove two screws. (Fig. 1)
3. Slide the battery cover slightly and lift it to remove.
4. [EL509W/531W/531WG] Remove the used batteries by pry
ing them out with a ballpoint pen or other similar pointed de
vice. (Fig. 2)
[EL531WH] Remove the used battery.
5. [EL509W/531W/531WG] Install two new batteries. Make sure
the “+” side is facing up.
[EL531WH] Install one new battery. First insert the “
–
” side
toward the spring. (Fig. 3)
6. Replace the cover and screws.
7. Press the RESET switch (on the back).
• Make sure that the display appears as shown below. If the dis
play does not appear as shown, remove the batteries reinstall
them and check the display once again.
(Fig. 1) (Fig. 2) (Fig. 3)
Automatic Power Off Function This calculator will turn itself off to save battery power if no key is
pressed for approximately 10 minutes.
SPECIFICATIONS Calculations: Scientiﬁ c calculations, statistical calcula
tions, etc.
Internal calculations: Mantissas of up to 14 digits
P ending operations: 24 calculations 10 numeric v alues
(5 numeric values in ST A T mode)
P ower source: [EL509W/531W]
3V
¶
(DC):
Alkaline batteries (LR44 or equivalent)
×
2
[EL531WG]
Builtin solar cells
3 V
¶
(DC):
Backup batter ies
(Alkaline batteries (LR44 or equivalent)
×
2)
[EL531WH]
1.5V
¶
(DC):
Heavy duty manganese battery
(size AA or R6)
×
1
P ower consumption: [EL509W/531W]
0.0002 W
[EL531WH]
0.0001 W
Operating time: [EL509W/531W]
Approx. 5000 hours
[EL531WH]
Approx. 17000 hours
when continuously displa ying 55555. at
25°C (77°F).
V ar ies according to use and other f actors.
Operating temperature: 0°C – 40°C (32°F – 104°F)
External dimensions: [EL509W/531W/531WG]
79.6 mm (W)
×
154.5 mm (D)
×
13.2 mm (H)
31/8” (W)
×
63/32” (D)
×
17/32” (H)
[EL531WH]
79.6 mm (W)
×
154.5 mm (D)
×
18.2 mm (H)
3 1/8” (W)
×
63/32” (D)
×
23/32” (H)
Weight: [EL509W/531W]
Approx. 95 g (0.21 lb) (Including batteries)
[EL531WG]
Approx. 97 g (0.22 lb) (Including batteries)
[EL531WH]
Approx. 110 g (0.25 lb) (Including battery)
Accessories: [EL509W/531W/531WG]
Batteries
×
2 (installed), operation manual,
quick ref erence card and hard case
[EL531WH]
Battery
×
1 (installed), operation manual,
quick ref erence card and hard case
FOR MORE INFORMATION ABOUT SCIENTIFIC CALCULATOR Visit our Web site .
http://sharpworld.com/calculator/
ENGLISH EL531W