Sharp COMPET-221 CS-221A User manual

SHA

ELE TR

CALC

LAT

WITH

ET·

221

MODEL CS-221A

UCT

N MANUAL

NTEN

Introduction

..........

....................................

. . . . . . .

·-

Features 3

Hints .

.. ..

............................

.....

..........

" 4

Voltage selector plug

...........................................

.....

Key

des

ign

ation

..........

. .

.......

.................................

Specifications 6

Operation

..........................................................

Addition

and subtrac

tion

......................................

Itiplication

and successive

multiplication

Division and successive

division.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sum (difference)

products

and individual products

................

Sum (difference)

quotients

and individual

quotients

...............

Product

(quotient)

sums (differences) and individual sums

(differences).

7. Discount calculation

............................

........

.....

Itipl

ication and division

constant

...............

..........

Mixed

calculation

............................................

10. Square

root

extraction

...................

....................

11. Correcting mistakes

..........................

..............

Square root table

....................................................

- 1 -

NTRODUCT

Sharp's amazing CS-221A electronic calculator using MSls and

ICs

marks another major

advance in modern business methods. Years

pioneering research and resourcefulness

in electronic engineering

has

enabled Sharp

develop

exceptionally remarkable

desk calculator.

The CS-221A

thoroughly reliable and carries

out

complicated calculations

with

ama-

zing

speed

and efficiency. This booklet

has

been

prepared

give current

users

and

prospective buyers a detailed understanding

the scope and breadth

the machine's

operation.

- 2 -

EATURES

* Fully Integrated Circuit

(lC)

Advanced MOS-MSls (Metal Oxide Semi-conductor Middle Scale Integrations and

MOS-ICs (Metal Oxide Semi-conductor Integrated Circuits) enormously reduce the

amount

working

parts and ensure greater dependability through superior trouble-

free performance.

* Compact

and

easy

carry

Space-age

all

design and unique memory device make the CS-221A amazingly

compact and light; can

carried anywhere

with

utmost

ease

and convenience.

* Wide

nge

ulati

ons

addition

its

four

arithmetical operations, mUltiplication, division by constant,

discount calculation and memory calculation

can

quickly

carried

out

with

maxi-

mum efficiency.

Ease

opera

Simplified operations such

AxBxCx

...

A.-;-B.-;-C

...

= etc. require no special

training. The answer

almost any practical mathematical problem appears instantly;

Eas

read display panel

Snap reading

with

newly developed green numeral indicator. Does

not

cause

eye

strain

with

long

use.

* Automatic decimal positioning

Tabulation selector specifies the decimal positioning automatically.

* Min

sign

indicator

Automatically

turns on when the result

negative.

* Overflow error check system

When the result

calculation exceeds 12 digits, all the decimal

points

automatically

turn

on and calculation

function

stops. No

worry

about mistake

overflow

* Double-setting protection keys

Numeral keys

are

designed that no

two

keys

are

set

at a time. This eliminates

error,

speeds

operation . .

...

worry

about double-setting

keys.

* Sophisticated styling

Lightweight, noiseless and easy-to-carry the

CS-221

A enhances

office

decors, im-

proves

working

morale, increases efficiency.

HINTS

highly

sensitive

ICs,

and

electronic

components

are

used,

avoid

placing

the

unit

hot,

dusty

humid locations.

sure

to turn

off

the

unit

before

disconnecting

the

power

cord.

not jolt

drop

the

unit.

not

stand

its

side

or turn it

over.

not

place

articles

top of

the

unit.

When

cleaning

the

cabinet

use

the

enclosed

cloth.

not

use

wet

cloth

any

organic

solutions

such

kerosene

benzine.

When

not

use,

keep

the

unit

covered.

SIGNATI

1,:

Tabulation selector

Specifies decimal places

4, 6).

(QJ-ill)

Numeral keys

8 Decimal

point

key

@ Clear

entry

key

Clears figures mistakenly set.

Clear key

Clears all the contents in the calculator.

Multiplication

key

Orders

multiplication

function.

ffi

Division key

Orders division

function.

@ Equal key

Derives sum, product, and quotient.

Red

equal key

Derives difference.

Memory

function

selector

(

When the

Memory

function

selector

set

"~"

position, the read-in

numbers are entered by@)key

rSl

into

the

memory

lated there. Therefore, sum (difference)

products (quotients)

can

calculated.

And

constant calculation

can

performed by entering

a constant

with

@keyrSJinto the

memory

back

the display (X register).

( N) For non-memory calculations

(MR) When the

Memory

function

selector

set

"MR"

position, the con-

tents in the memory register are called back

the display (X register).

The contents in the

memory

&tJ

key

after

this selector

set

"MR"

position.

- 5 -

Constant

switch

Remembers constant and functions'.

the switch

set

"x"

position,

multipli-

cation

function

and

multiplicand

are

remembered.

set

"--;.-"

position, division

function

and divisor are remembered.

After

setting the switch, constant catcu lations

are

carried

out

by setting variables andElkey

only.

set

"N"

position, the remembered functions are cleared.

SPEC

IFICA

TIO

Power source: AC 120V, 60Hz

Capacity: 12 digits, 6 digit decimals

Add

ition & Subtraction: 12 digits ± 12 digits =

digits

Multiplication: Total digits

Multiplier

and

Multiplicand

: Up

12 digits,

Product: Up to

digits

Division:

digits

-;-

digits = 12 digits -divisor

digit

Decimal point:

Preset

decimal

point

Negativ

Minus sign indication

Calcu

tion speed:

Addition

& subtraction 0.03

sec.

Multiplication

0.18

sec.

Division 0.19

sec

MOS MSls: 2

MOS

ICs: 35

Transistors: 48

Diodes: 290

Clock pulse: 50 kHz

Temperature:

O°C

-40°C (320 F - 1040

er consumption: 16W

Dimen

sio

ns:

255mm

wide, 1

07mm

high,

310mm

deep

(10"

wide,

41/4"

high,

121/4"

deep)

Weight: 3.7

(8.14 Ibs.)

- 6 -

ERA

TION

Connect the power cord

electric outlet, and

turn

the

unit

on.

sure

touchi

(;.

·'

key before starting calculations.

When

not

carrying

out

constant calculation.

sure

set

the constant switch

uN"

position.

Addition and Subtraction

* Sum. Difference:

to 12 digits (6 digit decimals)

Ex.

1-1

123 + 456 + 789 = 1368

Steps Operation Display Note

1 TAB=O Tabulation selector

2 123 123

3 @ 123

4 456 456

5 @ 579

6 789 789

7 @ 1368 Sum

Ex.

1-2

12+0.3584+0.235=0.7134

Steps Operation Display Note

1 TAB=4 Tabulation selector

2 .12 0.12

3 @ 0.1200

4 .3584 0.3584

§J

0.4784

6 .235 0.235

§J

0.7134

Sum

- 7 -

Ex.

1-3

35.62 -0.53 -40.15 =

-5.06

Steps Operation Display Note

TAB=2

Tabulation selector

2 35.62 35.62

3 § 35.62

4 .53 0.53

5 a 35.09

6 40.15 40.15

iii

06-

Difference

Note:

Use

§ key

for

addition.

Use

key

for

subtraction.

Multiplication

and

Succ

essiv

e multiplication

* Total digits

multiplier

and

multiplicand: Up

digits

digit decimals)

* Product: Up

digits (6 digit decimals)

Note: Set to theTabulation selector number largerthan the required decimal digits.

2-1

1.1

x 2.2 = 2.42

Steps Operation Display Note

TAB=2

Tabulation selector

1.1

3 ® 1.1

4 2.2 2.2

5 § 2.42 Product

- 8 -

Ex. 2-2 2.2 x 3.3 x 4.4 x 5.5 =175.6920

Operation Display

Note

Steps l, Tabulation selector

TAB=4

2.2

2 2.2

3 2.2

4 3.3

3.3

7.26

5 0 4.4

6 4.4

31.944

5.5

9 175.6920 Product

Note

When the decimal digits

the

product

are smaller than the specified Tabulation

selector number, the decimal

point

automatically

positioned. When the

cimal

digit

the

product

are

larger than the

spe

cified Tabulation selector number, the

selector specifies the decimal digits.

For

furthe

r continued Successive

Multip

lica

tion.

touch

the § key repeatedly and

proceed

with

the calculation

Division

and

Successive

div

sion

* Dividend: Up

digits (6 digit decimals)

11-

Divisor: Up

digits (6

digit

decimals)

Ouotient:

digits (6 digit decimals)

Note: Set to the Tabulation dial number larger than the required decimal

digit

3-1 43

524

...;-

2 = 218.262

Note

Display

Operation

Steps

Tabulation selector

TAB=3

1 I

436.524

Quotient

ffi

436.524

218.262

- 9 -

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