Sharp EL-520WGBK, EL-520WG Operation Manual

/

PRINTED IN CHINA / IMPRIMÉ EN CHINE / IMPRESO EN CHINA

SCIENTIFIC CALCULATOR

OPERATION MANUAL

EL-520WG

MODEL

STAT

MEM RESET

0 1

FSE TA B

0

ENGLISH

DEG (°)

GRAD (g)

RAD (rad)

P (x,y )

X

Y

0

y

x

P (r,θ )

X

Y

0

r

θ

04LGK (TINSE0805EHZZ)

INTRODUCTION

Thank you for purchasing the SHARP Scientific Calculator Model
EL-520WG.
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 in 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 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.

• 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.

♦ 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.

NOTICE

Hard Case

DISPLAY

Equation→
Display

Mantissa

•

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.

:

Appears when the entire equation cannot be displayed.
Press

xy/rθ: Indicates the mode of expression of results in the com-

</>

plex calculation mode.

: Indicates that data can be visible above/below the

screen. Press [/] to scroll up/down the view.

to see the remaining (hidden) section.

2ndF : Appears when @ is pressed.

Modify Function

Calculation results are internally obtained in scientific notation

←Symbol

Exponent

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 hy­perbolic functions are enabled.

Appears when K (STAT VAR), O or R is pressed.

ALPHA :
FIX/SCI/ENG: Indicates the notation used to display a value.
DEG/RAD/GRAD: Indicates angular units.

: Appears when statistics mode is selected.

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

: Appears when the calculator shows an angle as the result

in the complex calculation mode.

i : Indicates an imaginary number is being displayed in the

complex calculation mode.

BEFORE USING THE CALCULATOR

Key Notation Used in this Manual

In this manual, key operations are described as follows:

To specify ex: @e
To specify ln : I
To specify F : Kü

Functions that are printed in orange above the key require @ to
be pressed first before the key. When you specify the memory,
press K first. 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

Operation Entry M A-F, X, Y STAT*

(Display) ANS STAT VAR*

ª ×× ×
@c

Mode selection ×

@∏00*
@∏10*

3

4

×

RESET switch

: Clear × : Retain

1

Statistical data (entered data).

*

2

x¯, sx, σx, n, Σx, Σx2, ¯y, sy, σy, Σy, Σy2, Σxy, r, a, b, c.

*

3

*

All variables are cleared.

4

This key combination functions the same as the RESET switch.

*

[Memory clear key]

Press @∏ to display the menu.

• To clear all variables (M, A-F, X, Y, ANS,
STAT VAR), press 00 or 0®.

• To RESET the calculator, press 10 or 1®.
The RESET operation 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.

• See ‘SET UP menu’ for cursor use in the SET UP menu.

[Insert mode and Overwrite mode in the Equation display]

• Pressing @‘ switches between the two editing modes:
insert mode (default); and overwrite mode. 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.

• The mode set will be retained until the next RESET operation.

[Deletion key]

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

Multi-line Playback Function

Previous equations may be recalled 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 first.
Pressing [ will display the previous equation and the answer.
Further pressing [ will display preceding equations (after re­turning to the previous equation, press ] to view equations in
order). In addition, @[ can be used to jump to the oldest
equation.

[Data Correction]

Correction prior to pressing k immediately after a data entry:

1

2

• To edit an equation after recalling it, press > (<).

• The multi-line memory is cleared by the following operations:
@c, @F (including the Automatic Power Off fea­ture), mode change, memory clear (@∏), RESET, @
`, K (R) ?, constant calculation, chain calcula-
tion, angle unit conversion, coordinate conversion, N-base con­version, numerical value storage to the temporary memories and
independent memory.

Priority Levels in Calculation

Operations are performed according to the following priority:
Q Fractions (1
preceded by their argument (x
multiplication of a memory value (2Y, etc.) Y Functions followed by
their argument (sin, cos, etc.) U Implied multiplication of a function
(2sin30, etc.) I
q =, M+, M–, ⇒M, |DEG, |RAD, |GRAD, DATA, CD, →rθ, →xy
and other calculation ending instructions

• If parentheses are used, parenthesized calculations have prec­edence over any other calculations.

4, etc.) W ∠, engineering prefixes E Functions

l

nCr, nPr O ×, ÷ P +, – { AND } OR, XOR, XNOR

-1

, x2, n!, etc.) R Yx, x¿ T Implied

INITIAL SET UP

Mode Selection

m0: Normal mode (NORMAL)
m1: Statistic mode (STAT)
m2: Complex number mode (CPLX)

SET UP menu

Press ” to display the SET UP menu.

•A menu item can be selected by:

•moving the flashing cursor by using

><, then pressing ® (= key), or

• pressing the number key corresponding to the menu item number.

or is displayed on the screen, press [ or ] to

• If
view the previous/next menu screen.

• Press ª to exit the SET UP menu.

[Selecting the Display Notation and Decimal Places]

Four display notation systems are used to display calculation re­sults: Floating point; Fixed decimal point; Scientific notation; and
Engineering notation.

• 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.

[Setting the Floating Point Numbers System in Scientific Notation]

Two settings are used to display a floating point number: NORM1
(default setting) and NORM2. A number is automatically displayed
in scientific notation outside a preset range:

• NORM1: 0.000000001 ≤

• NORM2: 0.01 ≤

Determination of the Angular Unit

In this calculator, the following three angular units (degrees, radians,
and grads) can be specified.

x ≤ 9999999999

x ≤ 9999999999

Press

@G

SCIENTIFIC CALCULATIONS

• Press m0 to select the normal mode.

• In each example, press ª to clear the display. 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.

• In the constants calculations, 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
N-Base function.) To generate further random numbers in succes­sion, press ®. Press ª to exit.

• The generated pseudo-random number series is stored in memory
Y. Each random number is based on a number series.

[Random Numbers]

A pseudo-random number, with three significant digits from 0 up to

0.999, can be generated by pressing @`0®.

Calculation Ranges

• Within the ranges specified, this calculator is accurate to ±1

FSE TA B

0

[Random Dice]

To simulate a die-rolling, a random integer between 1 and 6 can be
generated by pressing @`1®.

[Random Coin]

To simulate a coin flip, 0 (head) or 1 (tail) can be randomly gener­ated by pressing @`2®.

[Random Integer]

An integer between 0 and 99 can be generated randomly by press­ing @`3®.

Angular Unit Conversions

Each time

@g

are pressed, the angular unit changes in sequence.

Memory Calculations

Mode ANS M A-F, X, Y

NORMAL
STAT ××
CPLX ×

: Available × : Unavailable

[Temporary memories (A-F, X and Y)]

Press O and a variable key to store a value in memory.
Press R and a variable key to recall a value from the memory.
To place a variable in an equation, press K and a 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 auto­matically stored in memories X or Y replacing existing values.

• Random function ...... Y memory

• →rθ, →xy .................... X memory (r or x), Y memory (θ or y)

• Use of R or K will recall the value stored in memory using
up to 14 digits.

Chain Calculations

• The previous calculation result can be used in the subsequent
calculation. However, it cannot be recalled after entering multiple
instructions.

• When using postfix functions (¿ , sin, etc.), a chain calculation is
possible even if the previous calculation result is cleared by the
use of the ª key.

Fraction Calculations

Arithmetic operations and memory calculations can be performed
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 (N-Base)

Conversions can be performed between N-base numbers. The four
basic arithmetic operations, calculations with parentheses and
memory calculations can also be performed, along with 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 (“

” appears.), @û (“ ” appears.), @î

(“

” appears.), @ì (“ ” appears.), @í (“ ”, “ ”, “ ”

and “ ” disappear.)
Note: The hexadecimal numbers A – F are entered by pressing

ß, ™, L, ÷, l, and I, 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 frac­tional part is converted into a binary, pental, octal, or hexadecimal
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, and, while using sexagesimal numbers, conversion to
seconds and minutes notation. The four basic arithmetic operations
and memory calculations can be performed using the sexagesimal
system. Notation for sexagesimal is as follows:

Coordinate Conversions

• Before performing a calculation, select the angular unit.

• 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

Calculations Using Physical Constants

See the quick reference card and the English manual reverse side.
A constant is recalled by pressing ß followed by the number
of the physical constant designated by a 2-digit number.
The recalled constant appears in the display mode selected with
the designated number of decimal places.
Physical constants can be recalled in the normal mode (when not
set to binary, pental, octal, or hexadecimal), or statistics mode.

Note: Physical constants and metric conversions are based either

on the 2002 CODATA recommended values or 1995 Edi­tion of the “Guide for the Use of the International System of
Units (SI)” released by NIST (National Institute of Stand­ards and Technology) or on ISO specifications.

Metric Conversions

See the quick reference card and the English manual reverse side.
Unit conversions can be performed in the normal mode (when not
set to binary, pental, octal, or hexadecimal), and statistics modes.

Calculations Using Engineering Prefixes

Calculation can be executed in the normal mode (excluding N­base) using the following 9 types of prefixes.

No. Constant

01 Speed of light in vacuum
02 Newtonian constant of

gravitation

03 Standard acceleration of

gravity
04 Electron mass
05 Proton mass
06 Neutron mass
07 Muon mass
08 Atomic mass unit-kilogram

relationship
09 Elementary charge
10 Planck constant
11 Boltzmann constant
12 Magnetic constant
13 Electric constant
14 Classical electron radius
15 Fine-structure constant
16 Bohr radius
17 Rydberg constant
18 Magnetic flux quantum
19 Bohr magneton
20 Electron magnetic moment
21 Nuclear magneton
22 Proton magnetic moment
23 Neutron magnetic moment
24 Muon magnetic moment
25 Compton wavelength
26 Proton Compton wavelength

No. Constant

27 Stefan-Boltzmann constant
28 Avogadro constant
29 Molar volume of ideal gas

(273.15 K, 101.325 kPa)
30 Molar gas constant
31 Faraday constant
32 Von Klitzing constant
33 Electron charge to mass

quotient
34 Quantum of circulation
35 Proton gyromagnetic ratio
36 Josephson constant
37 Electron volt
38 Celsius Temperature
39 Astronomical unit
40 Parsec
41 Molar mass of carbon-12
42 Planck constant over 2 pi
43 Hartree energy
44 Conductance quantum
45 Inverse fine-structure constant
46 Proton-electron mass ratio
47 Molar mass constant
48 Neutron Compton wavelength
49 First radiation constant
50 Second radiation constant
51 Characteristic impedance of

vacuum
52 Standard atmosphere

degree second

minute

x, x

¿ T Implied

↔

P (x,y )

X

Y

0

y

x

P (r,θ )

X

Y

0

r

θ

Rectangular coord. Polar coord.

No. Remarks

1in: inch
2cm: centimeter
3ft: foot
4m : meter
5yd: yard
6m : meter
7 mile : mile
8km: kilometer

9n mile : nautical mile
10 m : meter
11 acre : acre
12 m2: square meter
13 oz : ounce
14 g : gram
15 lb : pound
16 kg : kilogram
17 °F : Degree Fahrenheit
18 °C : Degree Celsius
19 gal (US) : gallon (US)
20 l : liter
21 gal (UK) : gallon (UK)
22 l : liter

No. Remarks

23 fl oz(US) : fluid ounce(US)
24 ml : milliliter
25 fl oz(UK) : fluid ounce(UK)
26 ml : milliliter
27 J : Joule
28 cal : calorie
29 J : Joule
30 cal15 : Calorie (15n°C)
31 J : Joule
32 calIT : I.T. calorie
33 hp : horsepower
34 W : watt
35 ps : French horsepower
36 W : watt
37
38 Pa : Pascal
39 atm : atmosphere
40 Pa : Pascal
41 (1 mmHg = 1 Torr)
42 Pa : Pascal
43
44 J : Joule

Prefix Operation Unit

k (kilo) @∑00 10

3

M (Mega) @∑01 10

6

G (Giga) @∑02 10

9

T (Tera) @∑03 10

12

m(milli) @∑04 10

–3

µ (micro) @∑05 10

–6

n (nano) @∑06 10

–9

p (pico) @∑07 10

–12

f(femto) @∑08 10

–15

/

SCIENTIFIC CALCULATOR

OPERATION MANUAL

EL-520WG

MODEL

SHARP CORPORATION

STAT

MEM RESET

0 1

FSE TA B

0

ENGLISH

[Random Numbers]

DEG (°)

GRAD (g)

RAD (rad)

P (x,y )

X

Y

0

y

x

P (r,θ )

X

Y

0

r

θ

A pseudo-random number, with three significant digits from 0 up to

0.999, can be generated by pressing @`0®.

Modify Function

Calculation results are internally obtained in scientific 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 converted to match
that of the display, so that the displayed value can be used
without change in subsequent operations.

STATISTICAL CALCULATIONS

Press m1 to select the statistics mode. The seven statisti­cal calculations listed below can be performed. After selecting the
statistics mode, select the desired sub-mode by pressing the
number key corresponding to your choice.
To change statistical sub-mode, reselect statistics mode (press

m1), then select the required sub-mode.
0 (SD) : Single-variable 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 calcu­lation (refer to the table below):

Single-variable statistical calculation

Statistics of Q and value of the normal probability function

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
calculation takes place, it obtains all statistics, except coeffi­cients a and b, from converted data rather than entered data.)

Quadratic regression calculation

Statistics of Q and W and coefficients a, b, c in the quadratic
regression formula (y = a + bx + cx
calculations, no correlation coefficient (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)

σ

x Population standard deviation (x data)

Q

n Number of samples

Σ

x Sum of samples (x data)

Σ

x2Sum of squares of samples (x data)

¯

y Mean of samples (y data)

sy Sample standard deviation (y data)

σ

y Population standard deviation (y data)

Σ

y Sum of samples (y data)

WΣy2Sum of squares of samples (y data)

Σ

xy Sum of products of samples (x, y)
r Correlation coefficient
a Coefficient of regression equation
b Coefficient of regression equation
c Coefficient of quadratic regression equation

• Use K and R to perform a STAT variable calculation.

Data Entry and Correction

Entered data are kept in memory until @c or mode selec­tion. Before entering new data, clear the memory contents.

[Data Entry]

Single-variable data

Data

k

Data

&

x &
x &

frequency

data)

Two-variable data

Data
Data

of the same data x and y.)

• Up to 100 data items can be entered. With the single-variable

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 two-variable 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

Data

k

y k
y &

2

). (For quadratic regression

(To enter multiples of the same

frequency

k (To enter multiples

[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 first)
order. To reverse the display order to descending (latest first),
press the [ key.
Each item is displayed with ‘Xn=’, ‘Yn=’, or ‘Nn=’ (n is the sequen-
tial 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.

• 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

Type Regression formula
Linear y = a + bx
Exponential y = a • e
Logarithmic y = a + b • ln x
Power y = a • x

Inverse y = a + b —

Quadratic y = a + bx + cx

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

• The denominator is zero.

• An attempt is made to take the square root of a negative number.

• No solution exists in the quadratic regression calculation.

Normal Probability Calculations

•P(t), Q(t), and R(t) will always take positive values, even when
t<0, because these functions follow the same principle used

when solving for an area.
Values for P(t), Q(t), and R(t) are given to six decimal places.

bx

b

1

x

2

100

.

COMPLEX NUMBER CALCULATIONS

To carry out addition, subtraction, multiplication, and division using
complex numbers, press m2 to select the complex number
mode.
Results of complex number calculations are expressed in two modes:

Q @}: Rectangular coordinate mode (xy appears.)
W @{: Polar coordinate mode (

Complex number entry

Q Rectangular coordinates

x-coordinate

or

W Polar coordinates

r

Ö

r: absolute value θ: argument

• On selecting another mode, the imaginary part of any complex
number stored in the independent memory (M) will be cleared.

•A complex number expressed in rectangular coordinates with the
y-value equal to zero, or expressed in polar coordinates with the
angle equal to zero, is treated as a real number.

• Press @∑0 to return the complex conjugate of the
specified complex number.

x-coordinate

θ

+

y-coordinate

+Ü

r

Ü

y-coordinate

θ

appears.)

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 final calculation result equals
or exceeds 10

• 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 and complex number 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.

100

.

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

x

for yx,
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

If the absolute value of an entry or a final or intermediate result of a
calculation is less than 10
calculations and in the display.

x

n!, e

, ln, etc., where continuous calculations are

,

¿

–99

~ ±9.999999999×1099 and 0.

–99

, the value is considered to be 0 in

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 ex-

hausted before they reach the service life stated in the specifica­tions.

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

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 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. Remove the two screws. (Fig. 1)

3. Slide the battery cover slightly and lift it to remove.

4. Remove the used batteries by prying them out with a ball-point

pen or other similar pointed device. (Fig. 2)

5. Install two new batteries. Make sure the “+” side is facing up.

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

display does not appear as shown, remove the batteries, reinstall
them and check the display once again.

(Fig. 1) (Fig. 2)

Automatic Power Off Function

This calculator will turn itself off to save battery power if no key is
pressed for approximately 10 minutes.

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