Victor 18-1721 User manual

Welcome

the

world

Victor

calculator

owners

Congratulations

your

choice

Victor

electronic

calculator. Careful

design

coupled

with

the use

quality

materials,

painstaking

American

workmanship,

and

advanced

research

and

production

facilities,

have

given

you

instrument

which.

with

proper

care,

will

provide

years

trouble-free service.

keep

your

machine

top

operating

condition-and

to assure

its

giving

you the

long

service

designed

provide-be

sure to ask

your

Victor

representative

about

the

low

cost

protection

offered

Victor

Full

Coverage

Maintenance

Agreement.

VICTOR COMPTOMETER CORPORATION

Contents

Functions

operating controls

2-3

Addition Isubtraction 4

Multiplication 5

Division 6

Memory group 7

Special functions

8-9

Power

raising key

Reciprocal key

Square

root

key

Change sign key

Exchange key

Logarithmic group 10-11

Trigonometric group

12-13

Degrees

Radians

The

finest materials and workmanship go

into the Series

1800

Electronic Calculator

assuring you dependable performance

over along period of time.

Ninety day guarantee.

ThiS

Victor

1800

Electronic Calculator

guaranteed

for

ninety days for parts and labor.

Any

guarantee.

statutory

otherwise.

does

not

include replacement or repair

of parts when damage or defect

aresult

of accident, abuse,

the elements.

VICTOR

ELECTRONIC DISPLAY CALCULATOR MODEL 18-1721

()

rr"'

\..)

Arithmetic:

Add. subtract. multiply.

divide and square

roOt.

Trigonometric:

Sin x. cos x. tan x.

arcsin

arccos x, and

arctan

Angles can

be expressed in terms

degrees

or radians.

Logarithmic:

Loge x. log,o x.

and lOx

Special:

xv.

'Ix.

TT.

change sign.

exchange (reverse) operation

and accumulating memory.

Function

operating

controls

MODEL

18-1721

ON/OFF

SWITCH:

Located beneath the

right

front. Left position is

"ON"

-right

position

"OFF".

CLEAR-ALL

KEY:

Clears amounts in the entire

machine. Sets initial state.

CLEAR KEY: Clears display. Also clears over-

flow

condition,

without

clearing keyboard.

ADD

KEY: Adds keyboard entries and causes

running sum

be displayed. Also, when

de-

pressed

repeatedly,

performs

constant

addition.

MINUS

KEY: Subtracts keyboard entries and

causes running sum

be displayed. Also,

when

depressed repeatedly. performs repeat

subtraction.

MULTIPLY

KEY:

Enters displayed value

multiplicand. Also completes asequential

calculation and sets

that

result

for

sub-

sequent multiplication.

DIVIDE

KEY: Enters the displayed value

dividend.

Also

completes asequential cal-

culation and sets

that

result

for

subse-

quent

division.

MEMORY

PLUS

KEY:

Adds entries or results

the value

memory.

MEMORY

RECALL

KEY:

Displays value from

the memory for use

any factor

for

reference.

MEMORY

CLEAR

KEY:

Sets memory

zero

without clearing display.

EQUALS

KEY:

Calculates results in multi-

plication. division, and

power

raising com-

putations. Retains multiplicand or divisor for

further computations.

SQUARE

ROOT

KEY:

Calculates

the

square

root

any positive displayed value.

CHANGE

SIGN

KEY:

Changes the algebraic

sign of the displayed value.

KEY:

Enters the constant

'IT

into

the dis-

play register.

EXCHANGE

KEY:

Exchanges the displayed

value

with

the

value

the

calculating

RECIPROCAL

KEY:

Calculates the

reciprocal

displayed value.

POWER

RAISING

KEY: Raises X

the wh

ole

number or fractional ypower.

LOG

BASE

SELECTOR

SWITCH:

COM

po-

sition

(switch

up)

conditions

the calculator

compute

common

logs (log,o)

antilogs

(lOX).

NAT

position

(switch

down)

condi-

tions

the

calculator

compute

natural logs

(loge) or

antilogs

(eX).

LOG

KEY:

Calculates the

common

log

(log,o)

or the natural log (loge).

INVERSE

KEY:

Conditions

the calculator

compute

the

following:

(a)

Antilogs

lOx or

eX.

(b)

Inverse trig

functions

sin-

cos-"

tan-

1•

Nore: The

INV

key and

then

the LOG key

are

touched

for

calculating antilogs, and

INV

touched

prior

touching

the

SIN,

COS

TAN

keys

for

calculating inverse

trig

functions.

DEGREE/RADIAN

SELECTOR

SWITCH:

DEG

position

(switch

up)

conditions

the calcula-

tor

compute

the

trigonometric

functions

(sin, cos or

tan)

angle expressed

degrees

the inverse

trigonometric

func-

tions

(sin-

cos-

tan-')

degrees.

RAD

position

(switch

down)

conditions

the calculator

compute

the

sin, cos or tan

angle expressed in radians

the

in-

verse

trigonometric

functions

(sin-

1•

cos-',

tan-

1)in radians.

TRIG

FUNCTION

KEYS:

Calculates the sin,

cos or tan

angle expressed in degrees

or radians. The secant.

cosecant

and cotan-

gent

functions

can

obtained

perform-

ing

cosine, sine and

tangent

functions

first

and

touching

1key I.e.,secanto =:c::-:c-.--;-:

cosine H

Calculates tl18

sin-

cos-

1,or

tan-

1,ex-

pressing

the

angles in degrees or radians

when

used

sequence

wirh

the INV key.

To find

sec-'.

csc-'.

caC"

first invert secant,

cosecant

cotangent

and then

find

C05-

ine-

sine-

1,or

tangenc

1,respectively, Le"

secanC1

=cosine-

1(1 )

secant

(-)

OVERFLOW:

Fis displayed

for

the

following

operations-where

results

are>

digits

left

the decimal

point

and entries

are>

digits

Other

functions

have been

defined

dis-

play

•Division

zero,

including

1/X

where

•Square

Root

anegative

number

•Arc sine or arc cosine

number>

•Log X, In

and

zero

negative number

•

Computing

tangent

90° ±n

180

where n

an integer

ACCURACY:

All

arithmetic

functions,

'Ix

and

,,-

yield

place

accuracy truncated

the

least

significant

digit

where

the value

Xis

:2:

10-

10+

-1.

All exponential and

trigonometric

functions

yield

place accuracy rounded

the least

significant

digit

within

the

following

range

arguments:

log"

Xand loge X X is

:2:

10-

or';

10"3

Inverselog

Xis:2:

-12.30r

+14

Inverse loge X X is:2:

-28.4

or <

+32.2

Xis

10-

or:::';;

10+

Note: For

the limits

yare

dependent

the value

SinX,cosX,

tanX

XiS:2:

-360°

+360

Sin-

Cos-

1X X

:2:,

-lor';

+ 1

Tan-

Xis>

-10"or

+10"

12 place accuracy

assured

arguments

are

withi

.01

adegree ±90°

for

sine

and

cosine;

place accuracy

arguments are

within

one degree (1°)

±90"

for

tangent.

assure

place accuracy

when

computing

functions

angles>

360°

first convert

angle between ±360",

for

example

convert

3600030°

30".

Specifications:

Usable

Temperature:

O·

40·

C(32°F

104°F)

Circuitry:

MOS-LSI

Power Input:

115

Volts

Ale

50/60

Power

Consumption:

Watts

<?{::

115

Volts

Ale

Dimensions:

10" x

%" x5"

Weight:

6Ibs. 2ozs.

Addition/subtraction

Addition/subtraction-automatic

repeat

Example:

ENTER

TOUCH

DISPLAY

123

-456

789.2561

.0039

123

456

789.2561

.0039

Ie'

579.26

Individual

totals

and

summary

totals

Example:

ENTER

TOUCH DISPLAY ACCUMULATE

MEMORY

8.7 +15.5 =24.2

::1

::,

9.8

5.7

5.5

3.2

9.8

5.7

5.5

3.2

Summary

examples:

Simple

multiplication

Chain

multiolication

Multiplication

with

constant

multiplicand

Memory

accumulation

Simple

multiplication

and

chain

multiplication

Multiplication

Examples:

156

ENTER

5.67

TOUCH

DISPLAY

Memory

accumulation

and

constant

multiplicand

Example:

12 x13 =

156

12x14=168

-(12

x15) =

-180

ENTER

TOUCH

••

•••

.11

DISPLAY

ACCUMULATE

MEMORY

ACCUMULATED

TOTAL

Division

Summary

examples:

Simple division

Chain division

Division

with

constant divisor

Memory accumulation

Simple

division

and

chain

division

ENTER TOUCH DISPLAY

15 -

24 -

15+6=2.5

24 + 4 + 3 =2

Examples:

Memory

accumulation

with

constant

divisor

Example:

ENTER TOUCH DISPLAY ACCUMULATE

MEMORY

180 -

240 -

360

-ACCUMULATED TOTAL

180 +

360

=18

240 +

PRIME

USES

MEMORY

Accumulate

keYboard entries

results

II Store keyboard entries or results

Accumulation

and

storage

Memory

group

Accumulating:

(2+3)

(3x5)

(12~4)

10=3

II.

Storage:

1.265 x

(1.265

+1)

~5-

ENTER

1.265

TOUCH

DISPLAY

ACCUMULATE

MEMORY

ACCUMULATE

MEMORY

Special

functions

Power

raising

key

the ypower)

Examples:

12.5

1.3

12.5.

1.3

ENTER

12.5

1.3

12.5

1.3

TOUCH

DISPLAY

Reciprocal

key

Calculates reciprocal

displayed value.

Example:

Obtain raciprocal

Calculate: 27(4

ENTER

TOUCH

DISPLAY

Square

root

key

Calculates the square root

any positive value.

Example:

Compute .../156.25

ENTER

156.25

TOUCH

DISPLAY

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