Monroe 770 Manuale utente

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MONROE

INTERNATIONAL

DIVISION

LITTON

INDUSTRIES

•

MONROE

GENERAL

OFFICES:

ORANGE.

NEW

JERSEY

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,CONTENTS,

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Operating ContrOls and

Their

Use , , , , , , ,

Your Silent Partner .,

, , , , , . , , , , , , , , , .

Fundamental Operations

, , ; , , , , , , ' . , ,

Monroe

770

Electronic Calculator , ,

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, , , " 2

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NROE

INTERNATIONAL

DIVISION

LITTON

INDUSTRIES

•

GENERAL

OFFICES:

ORANO".

NfW

JfIlU'

MONROE

Your

Silent

Partner

...

The

770

ELECTRONIC

CALCULATOR

TIris

Monroe's

silent efficiency is

matched

only

its

electronic speed

and

operational

ease.

Now

you

can

solve

arithmetic

problems

milliseconds

...

easily

...

silently.

The

770's

memory

and

storage registers

and

its

advanced

electronic circuitry

are

designed for calculations using

any

combination

arithmetic

operations.

Every

answer is

instantly

available for

subsequent

use;

every

answer is

automatically

displayed decimally correct.

Algebraic logic, too,

has

been designed

into

the

Monroe

770. All negative entries

and

results

are

indicated

amber

light. .' .

TIris booklet provides complete

instructions

for

operating

the

Monroe

770 Electronic

Calculator

...

your

silent

partner.}

MONROE

770

ELECTRONIC

CALCULATOR

(\',~;'i

P,",

III

OPERATING

CONTROLS

AND

THEIR

USE

TURN

THE

CALCULATOR

turn

the Monroe 770, move the on·off slide (4) to the left

the

red dot shows.

warm·up time

required. To turn the calculator

off, move the

ide

the right.

Before starting

calculate

you

should make sure the arithmetic reg·

isters and display

(1)

are cleared by depressing

the'll

and

Ckeys.

DISPLAY

The display shows all entries and answers

large, illuminated

numerals.

NUMBER

ENTRY

Set anumber in the 10·key keyboard (25) by depressing the keys

that'

correspond to the digits in the number. For example:

406

set by

depressing 4, then 0, then 6. The number is shown in the display.

DECIMAL

KEY

Depressing the decimal

key

(24) locates the decimal in the keyboard

number. Touch this

key

before setting the decimal part of the num·

ber.

When

setting awhole number, the decimal

key

does not have to

used.

DISPLAY

CLEAR

KEY

anumber is set incorrectly,

can

cleared by depressing the

key

(12).

111111

. 0

•

III

•

OPERATING

CONTROLS

AND

THEIR

USE

BASIC

ARITHMETIC

PLUS

KEY

Prepares the arithmetic unit to add the next num·

ber in the display.

MINUS

KEY

Prepares the arithmetic unit

subtract the next

number in the display

ENTER

MULTIPLICAND

KEY

Prepares the arithmetic unit to

multiply

the num·

ber in the display

the next number in the display.

ENTER

DIVIDEND

KEY

Prepares the arithmetic unit

divide the number

the display by the next number in the display.

EQUALS

BAR

Completes the addition, subtraction, multiplica·

tion,

division, and transfers the answer

the

display.

ARITHMETIC

CLEAR

KEY

Clears the arithmetic registers of any accumula·

tions or remainders of division problems.

ARITHMETIC

READ

KEY

When

held down

this

key

displays the contents of

the arithmetic register.

When

released it brings

back the number formerly in the display.5

The

arithmetic

group

keys performs

the

four basic rules

arithmetic:

addition, subtraction, multiplication, and division.

Each

problem is entered

the

calculator exactly as

the

equation would be written on paper.

The

calculations

take

place

the

arithmetic register and,

the

end

the

problem,

the

answer is transferred

the

display register.

For

example:

12 +5 - is keyed into the 770 just

it is written

paper

Set 12 Depress +

Set 5Depress =

.Read 17 Answer

.in

display

12 - 5 -

12 X

12 : 5 =

Set 12

Depress-

Set 5Depress =

Read

7Answer

display

Set 12 Depress x

Set 5Depress =

Read

Answer in display

Set 12 Depress :

Set 5Depress =

Read

2.4

Answer

display

In each case the answer is displayed within asplit second.

•

+5 - 8

OPERATING

CONTROLS

AND

THEIR

USE

Set 12 Depress +

Set 5Depress -

Set·8

Depress =

Read

9Answer

display

The answer in the display

can

used

for

the next arith-

metic operation without resetting. For example:

(12 +5) X3Set 12 Depress +

Set 5Depress =

Read

17 Answer in display

Depress x

Set 3.......Depress =

Read

51 Answer

display

The result of 12 +5did not

have

reentered through

the keyboard. Since

the display. adepression of

the X

key

sets up

that

number

amultiplicand.

OPERATING

CONTROLS

AND

THEIR

USE

OVER

CAPACITY

acase where the product of amultiplication exceeds the 15·digit capacity,

the

770

provides for acorrect answer of up

digits. Aproduct of

digits is shown in the following

way:

The left·hand digits in excess of 15 are displayed.

The

right·hand

digits

remain in the arithmetic register

and

can

displayed by depressing the

key.

Before beginning another problem, clear the arithmetic register by depressing

the

'iI.

Example

1111111112=12345678987654321

Instructions

Set 111111111.....Depress x

Depress =

Read

12 in display

Depress and hold

It,

Read

345678987654321

display

OVERFLOW

LIGHT

The

red

overflow light indicates that

operation

has

produced

overcapacity.

•,

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