Sears 10m Instruction Manual

INTRODUCTION

Your Sears

Portable

Electronic

Calculatorislight

enough

and

small

enoughtobe

used in

one

hand

yetitprovidesastandard

keyboard

and a

light

emitting

diode

(LED)

display

that

is easily read at

homeorin

the

office.

The

ten

digit

display

and

the

full floating

decimal

allow

the

calculationofmost

problems

without

sacrificing

accuracy, and

the

time-out

feature

provides

longer

battery

life

between charges.

Your

calculator

has

the

abilitytosolve

engineering

or

bUdget problems,

with

such

featuresasa

switch-selectable

accumulativeorfUlly

accessible

memory,

square

root,

reciprocal,

percentage,

automatic

constant,

automatic

squaring,

and

change

sign.

The

calculator

operates

In

"algebraic'"

mode,

which

aflows you to

perform

chainormixed

calculationsinthe

orderinwhich

they

are

written.

The

reciprocal

and

change

sign

features

are

particularly

helpfUl In

solving

complex

problems. We

suggest

that

this

programmed

Instruction

Manualberead

with

the

calculator

in

hand.

Performing

the

operationsasyou read them

will

increase

your

familiarity

with them. For a

quick

reference, an

outlineofoperationsison

the

back

of

the

calculator.

ELECTRONIC

CACULATOR

GUARANTEE

We

guarantee

this

calculatortowork

properly, If i!

does

not,

simply

returnitto

our

nearest store and we

will:
During the first year, repair it,
free of charge,

(wherever you live in the United States)

SEARS, ROEBUCK AND CO.

OPERATiON:

Your

calculator

has rechargeable NiCd

batteries

included

in the unit. The following

procedure

should be followed for

AC.

and

battery operation:

AC

Operation:

Connect

the

Charger

unit to anystandard

120 Volt

electrical

outlet

and plug

the

connector

into the Calculator.

After

the

above connections, the

power

switch

may

be turned on and operation started.

(While

connectedtoAC, the

internal

batteries are

automatically

charged

whether

the

power

switchis"ON"or"OFF'".)

Battery Operation:

Disconnect the

Charger

cord

and turn

the

power

switch

"ON".

With normal use a full

battery

charge can be

expectedtosupply

about 5 hoursofworking lime.

NOTE: When the low battery

Indicator

(L) on the

display

is lighted,donot

continue

battery

operation. This

indicates

need

forabattery

charge.

Battery Charging:

Simply

follow

the same

procedure

as in AC

operation. The

calculator

may be used

during

the

charge

periodifdesired. In

order

to

fully

chargeabattery

which has been

completely

discharged, 7 hoursisrequired.

NOTE:

Although

no damage will result

from

prolonged

periods

with

the

Charger

connected, it is advisable to remove

the

Charger

cord

when the

Calculatorisnot

in

use

after

a full

recharge

cycle.

CAUTION:

To

avoid possible damage, use

only

the

charger

provided with the

calculator.

aKey

I;

Key

1m3

Key

mI

Key

III

Key

II

Key

m

-1iJ

Keys

"ON"

Switch

II

Key

II

Key

EI

Key

a

Key

II

Key

I!(

II

I[

Sem

lOrn

111[.

J

I:

III

If

~ITJ

m-:l\

II

i1m

ffi'j]

m

~

Bill

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.

--

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2

CONTROLS AND INDICATORS

Turns CalculatorON &OFF.
Enters a

"subtract"

command
and performs any possible
preceding operation.

Enters a

"divide"

command
and performs any possible
preceding operation.

Enters a

"multiply"

command
and performs any possible
preceding operation.

Enters an

"add"

command
and performs any possible
preceding operation.

Completes previous operation
and retains appropriate

function

for

a constant

operation.
Changes the sign

of

the

contents

of

the display.
Enters a decimal point.
Enter

digitsofa number.

Adds the displayed number
to the Memory.

Subtracts the displayed
number from the Memory.

Displays memory content
without affecting the memory.

Clears memory without
altering

the

information on

the display.

0.333333333

Completesapercent
operation

and

conditions

a

markupordiscount

operation.

Automatically

appears

to the

rightofany

number

entered,

unless

insertedinanother
sequencebyuseofthe
Decimal key. With

fractional

numbers, it

willbepreceded

by

a zero, Le.

1/3

will

appear

as

Indicates

a negative

number

and

immediately

precedes

a
number.
Appears

as

Indicates

that

while

using the

calculator

the

keyboard

has

been inactive

for

apprOXi-

mately 30 seconds.

Appearsinthe

center

field

as

Warns

of

need

for

battery

charging.

II

Key

Decimal

Point

Indicator

Minus

Sign

Indicator

Memory

In Use

Indicates

that

data is

stored

Indicator

in

Memory

Register.

Appears

as

Low

Battery

Indicator

Time-Out

•

Indicator

When used

once:

(1)

During

number

entry,

clears

the

last

entry

and

recalls

the previous

entry

if

one

has been entered.

(2)

During

Time-Out,

recalls

and

displays

the

informationonthe

display

without

affecting

it.

(3)

During

overflow,

clears

the

overflow

indicator.

During

all

other

conditions

and

also when

touched

twice,

this

key

will

clear

calculator

completely

except

memory

register.
When on

::;

position,

the

results

providedbyusing

=,

vx.

~

& % keys are

accumulated

into

the

memory.
Displays

square

rootofthe

entered

numberorcompletes

the

preceding

operation

and

displays

square

rootofthe

result.
Displays

reciprocalofthe

entered

numberorcompletes

the

preceding

operation

and

displays

reciprocalofthe

result.

Switch

II

Key

iii

Key

4

5

Special Battery-Saver Feature

If

youdonot

actuate

the

keyboard

for

approx-

imately30seconds

while

performing

a

calculation,

the

display

will

turn

off

automatically,

leaving

only

the

"Time-Out

Indicator",

previously

described,

on.

This

feature

decreases

unnecessary

power

consumption,

and

extends

battery

life

between

charges.

The

displayed

information

canberecalledbytouching

the

!it

key

once,

The

informationorfunction

mode

Will

not

be

affected.

Overflow
indicator

Indicatesacalculation

result

that

contains

more

than

ten

digits.

Appears

as

Note;Anegative

result

of

more

than

ten

digits

can

indicate

overflow

as

,'\0

BATTERY

NOTES

1.

With normal useatroom temperature, a full
batterycharge can be'expected to supply about
5 hours

of

accumulated working time.

2.

The Calculator may be used while its battery is

charging.

3.

Batteriesthat have been neither used

nor

charged

for

as

longas2or3monthswill suffer substantial

loss

of

operating time through a tendencyto

self-discharge.

As

ageneral rule, batteries lose

about

1%

charge per day due to self-discharge,

atnormal temperatures.

4.

For optimum performance and long life;
a.

Alternate frequently between Battery and
ACpower.

b.

Operate atornearnormal room temperatures.

c.

Chargeassoonaspossible upon appearance
of

the Low-Battery indicator.

5.

Recharge time is 7 hours for a fUlly discharged
battery, with

the calculator off.

6.

The LOW-Battery indicator is designed toappear
as

soonasbatteryvoltagedropsto the lowest

value that

will supportoptimum performance

of
the Calculator.Shouldfurtherdischargeoccur,
through continued operations

or

self-discharge.

the Low-Battery indicator may fail

to

appear.
Do notcontinueto operate on batteries when
thiscondition is noted.

or

adamaged battery

may result.

7.Asageneral rule, if improper operation occurs.
first try the Calculator with its charger connected.
Ifoperation is then normal, this indicates the
batteriesare low.

8.

Do not store the unitin hightemperatureareas
such

as

thetopofradiatorsorthe rear deck

of
automobilesexposed to the sun. The Calculator
will operate satisfactorily over

an

ambient tem-

perature range of

O·

to

50°C (32°to122°F) and

relative humidity

to

95%.

6

7