Victor 1800 series Operating instructions

Contents

Functions

of

Welcome

to

the

world

of

Victor

calculator

owners

Congratulations on

your

choice

of

a Victor electronic

calculator. Careful design,

coupled

with

the use

of

quality

materials,

painstaking

American

workmanship,

and

advanced

research

and

production

facilities, have

given

you

an

instrument

which,

with

proper

care,

will

provide

years of

trouble-free .s.ervice.

To

keep

your

machine

in

top operating

condition-and

to assure its

giving

you the

long

service

it

is

designed

to

provide-be

sure to ask

your

Victor

representative

about

the

low

cost

protection

offered

by

a

Victor

Full

Coverage

Maintenance

Agreement.

VICTOR COMPTOMETER CORPORATION

operating controls

2-3

Addition /subtraction 4

Multiplication

5

Division 6

Memory group 7

Special functions

8-9

Power raising key

Reciprocal key

Square root key

Pi

key

Change sign key

Exchange key

Logarithmic group 10-11

Trigonometric group

12-13

Degrees

Radians

guarantee

The fin

es

t

ma

t

er

ia

ls

and

wo

rkmanship go

i

nto

the

Se

r

ie

s

1800

Electronic Calculator

ass

uring you dependable

pe

rformance

ov

er

a long period

of

time.

Ninety d

ay

guarantee. This Victor

1800

Electronic Calculator

is

guaranteed for

ninety d

ay

s for parts and labor.

Any

guarantee, statutory or otherwise,

does not include replacement or repair

of

parts w hen damage or defect

is

a

re

su

lt

of accident. abuse, or the elements.

VICTOR

ELECTRONIC DISPLAY CALCULATOR MODEL 18-1721

.

an

electronic scratch pad

for scientists and engineers

Arithmetic:

Add.

subtract, multiply,

divide and square root.

Trigonometric:

Sin

x.

cos

x.

tan

x.

arcsin

x,

arccos x, and

arctan x. Angles can

be expressed

in

terms

of

degrees

or radians.

Logarithmic:

Loge

x,

log

10

x,

ex

and 1ox

Special:

xY,

1

/x.

TT.

change sign.

exchange (reverse) operation

and accumulating memory.

-

ON

/

OFF

SW

ITCH:

Lo

ca

t

ed

beneath the right II

MEMORY

PLUS KEY: Adds entries or results

front

. Left position is

"ON"-r

i

ght

position to the

va

lu

e in memory.

is

"OFF".

Ill

MEMORY

RECALL KEY: Displays value from

II

CLEAR-ALL

KEY: Clea

rs

amounts

in

the e

nt

ire the memory for

use

as

any factor or

far

machine. Sets initial

sta

t

e.

reference.

Iii

CLEAR KEY: Clears di

sp

la

y.

Al

so

c

le

ars

over- II

MEMORY

CLEAR KEY :

Se

ts memory to zero

flow condition, w

ithout

clearing keyboa

rd.

without clearing display.

I IEQUALS KEY:

Ca

lculates results in

multi-

ADD

KEY: Adds keyboard ent

ri

es

and causes plication, division, and power raising com-

putations. Retains multiplicand or divisor

for

running sum to

be

displayed. Also, when de- further computations.

pressed

repeatedl

y,

performs

constant

addition.

SQUARE

ROOT

KEY: Calc

ul

at

es

th

e square

II root of any positive displayed

va

lue.

I

MINUS

KEY: Subtracts

ke

yboard entries and

■

CHANGE

SIGN

KEY: Changes the algebraic

causes running sum to

be

displayed. Also, sign

of

the displayed

va

lue.

when depressed repeat

ed

l

y,

pe

rforms repeat

subtraction. II Pl KEY: Enters the constant

TI

into the dis-

pl

ay

register.

El

MULTIPLY

KEY: Enters displayed

va

lue

as

mu

ltipli

ca

nd. Also complet

es

a sequential II

EXCHANGE

KEY: Exchanges the displayed

calculation and sets that

re

s

ult

up

for

sub-

va

lue w

it

h

the

value in

the

calculat

ing

sequent multiplica

tion

. register.

II

DIVIDE

KEY: Enters the displayed val

ue

as

JI

RECIPROCAL

KEY:

Ca

lculat

es

the reciprocal

dividend. Also complet

es

a sequential

ca

l-

of displ

aye

d

va

lue.

culation and sets that result up

for

subse- II

POWER

RAISING

KEY: Raises X

to

the

who

le

2 quent division. number or fractional y power.

COM

I

NAT

Ill

II

DEG

I

RAD

LOG BASE SELECTOR

SWITCH:

COM

po-

sition

(sw

it

ch up) conditions the

ca

lculator

to

compute

common logs (log,0) or antilogs

(10

x).

NAT

position

(sw

itch

down)

condi-

tions the

ca

lculator to compute natural logs

(loge) or antilogs (ex).

LOG KEY :

Ca

lculat

es

the

commo

n log (log,0)

or the natural log (loge) .

INVERSE

KEY: Conditions the

ca

lculator to

compute the

follow

in

g:

(a)

Ant

il

ogs 1

ox

or

ex.

(b) Inverse trig functions

sin-

1,

cos-

1,

tan-1.

Note: The INV key and then the L

OG

key

are

touched

for

ca

lcu lating antilog

s,

and INV

is

touch

ed

prior

to

touching

the SIN, COS

or T

AN

keys

for

ca

lculating inverse trig

functions.

DEGREE/RADIAN

SELECTOR

SWITCH:

DEG

position

(sw

itch up) conditions the

ca

lcula-

tor

to

compute the trigonometric

functions

(s

in, cos or tan)

of

an

angle exp

res

sed

in

degrees

or

the in

ve

r

se

trigonometric

func-

tion

s

(sin-

1,

cos-

1, tan-1)

in

degrees.

RAD position

(switch

down)

conditions

th

e calculator to compute the sin, cos or tan

of

an

angle exp

re

ssed in r

ad

ians or the

in-

ve

r

se

trigonometric

functions

(sin-

1, c

os-

1,

tan-1) in radians.

TRIG

FUNCTION

KEYS:

Ca

lcu lates the sin,

cos or tan

of

an angle express

ed

in degrees

or radians. The secant, cosecant, and co

tan-

gent

functions

ca

n

be

obtained by perform-

ing cosin

e,

sine and tange

nt

functions first

and touching1

/X

key i.e., seca

nt

s=

1. 8

cosine

Ca

lculat

es

the sin-1,

cos-

1, or

tan-

1, ex-

press

in

g the angles in degrees or radians

when used

in

sequence with the INV key.

To find sec_,, csc-1, cot_,, first in

ve

rt secant,

cosecant or cotange

nt

and then find cos-

ine

-1,

sine-1, or tange

nt-

1, respectively,

i.

e.,

seca

nt

_,

=cosi

ne

_,

( 1 8)

secant

F

OVERFLOW

:

Fi

s displayed for the

following

operations-where

re

s

ult

s

are

>

14

digits

to

left

of

the decimal

point

and entri

es

are

>

14

digit

s.

Other func

tion

s have

be

en defined

to

dis-

play F:

•

Di

vision by

ze

r

o,

including 1

/x

where X = 0

• Squ

are

Root

of

a

ne

ga

ti

ve

numb

er

• Arc

si

ne or arc cosine

of

a

numb

er >

• Log

X,

In

X,

and

xv

of

ze

ro

or a

ne

gative number

• Computing

tangent

90'

± n 180

w here n

is

an

int

eger

ACCURACY:

A

ll

ar

ithmetic functions,

+.

-,

-,--

,

X,

1

/x

and

-r

yield

14

place

acc

ura

cy truncated

to

the least sig nifi

ca

nt

digit

where the

va

lue

of

X is

;:::

10

-

14

or

:;;1

0+

14

-1

.

All exponential and

trigonometric

functions yield 12 place accuracy rounded

to the least signifi

ca

nt

digit

within the

fo

ll

owing

range

of

argume

nt

s:

l

og,aXand

logeX X is

:2'.:

10

-

14

or:s;

10

+

13

ln

ve

r

se

log10 X Xis;:::

-12

.3o

r <

+14

ln

ve

r

selog

eX X is

:2'.:

-

28.4o

r <

+32.2

xv

X is;:::

10

-

14

or:;;

10

+

13

Note: For

xv

the

limit

s

of

y

are

dependent

on the

va

lue

of

X.

Sin

X,

cos

X,

tan X

Xis

:2'.:

-

360

' or

:;;

+ 360

Sin-

1

X,

Cos-1

X X is

:2'.:

-1

or

:;;

+ 1

Tan-1X X i

s>-10

13

or

<+

10

13

12 place accu

ra

cy is

assu

r

ed

if arguments

are

within

.01

of

a degree ±

90'

for

sine

and cosine ; or

10

place accuracy

if

argumgnts are

with

in one degree

(1

')

±

90'

for

tangent.

To assure 12 place accuracy

whe

n

comput

ing

functions

of

ang

les

>

360'

first convert

to

an

angle between ±

360',

for example convert

3600030'

to

30'.

Specifications:

Usable

Temperature:

0°

C

to

40

° C (32°F to 104°F)

Circuitry:

MOS

-L

SI

Power

Input:

115

Volts

A/C

50/60

Hz

Power

Consumption:

18

Watts

@

11

5 Volts

A/C

Dimensions:

1

0"

x

11

½"

x 5"

Weight:

6 lbs. 2 ozs. 3

Addition

/subtraction

Addition/subtraction

-

automatic

repeat

4

Example:

123

-456

789.2561

.0039

579.

26

ENTER

123

456

789.2561

.0039

Individual

totals

and

summary

totals

Example:

3.2 5.7

5.5 9.8

8.7 +

15

.5 =

24

.2

ENTER

3.2

5.5

5.7

9.8

TOUC

H

TOUCH

DISPLAY

/ I f

,--

r I

If

' J ( I I

I-

I I

I I i

{-

I I I I

-. -

DISPLAY

ACCUMULATE

MEMORY

Summary

of

examples:

Simple

multiplication

Chain multiplication

Multiplication

with

constant

multiplicand

Memory accumulation

Simple

multiplication

and

chain

multiplication

Examples:

72x73=756

72.7234x5.67

=

68.739678

2 X 3 X 4 =

24

ENTER

12

13

12.1234

5.67

2

3

4

Memory

accumulation

and

constant

multiplicand

Example:

72x73=756

72

X

74

= 768

-(12

X 75) = - 7

80

ENTER

12

13

14

15

TOUCH

DISPLAY

Multiplication

ACCUMULATE

MEMORY

ACCUMULATED

TOTAL

5

Division

6

Summary

of

examples:

Simple division

Chain division

Division

with

constant divisor

Memory accumulation

Simple

division

and

chain

division

Examples:

15

-c-

6 = 2.5

24

7 4 7 3 =2

ENTER

15

6

24

4

3

TOUCH

Memory

accumulation

with

constant

divisor

Example:

180

-c-

20

= 9

240

-c-

20

=

12

360

-c-

20

=18

ENTER

180

20

240

360

TOUCH

DISPLAY

11

I 17

I I

II_

I

ACCUMULATE

MEMORY

ACCUMULATED TOTAL

PRIME

USES

OF

MEMORY

Accumulate

keyboard entries

or

results

11

Store keyboard entries or results

Accumulation

and

storage

I.

Accumulating:

(2+3)-(3x5)

+

(12--c-4)

+

10=3

II.

Storage:

1.265 X (1.265 + 1)

5

ENTER

2

3

5

12

4

10

ENTER

1.265

5

1

TOUCH

DISPLAY

It

11

I

l.1

_;_I

I I I

-I

It

I I I -

I I I I I I I I I

~.-

--

~

Memory

group

ACCUMULATE

MEMORY

If

1

I

1.J

ACCUMULATE

MEMORY

7

$pedal

functions

m

Power

raising key

(x

to

they

power)

Examples:

72.5 7·3

72

.5 -7-3

ENTER

2

5

12.5

1.3

12.5

1.3

TOUCH

Reciprocal key Calculates reciprocal

of

displayed value.

Example:

ENTER

TOUCH

Obtain reciprocal

of

8 8

Yx

Calculate: 2 1

/4 2

4

■

DISPLAY

I/

I I } I ) J J

, 1 I l I

■

Square

root

key Calculates

the

square r

oot

of

any positive value.

Example:

ENTER

TOUCH

DI

SPLAY

8 Compute

V756

.

25

156.25

■

Pi

key

Enters the value,

TT

in the dis.pl

ay.

Example:

ENTER TOUCH DISPLAY

Compute Circumference

of

a 5

circle where: r = 5

(rrr

2)

-]

I/

I

I/

11

I •

1111

n

:J

• I -, I

.J

:,

,-

/_

I 1 ,

'-,

-,

I I

7 I

_I

/-

I

•_/

IJ I

I_

I I I 1 , , I

I

L/

0

_/

_ I

_/

U I /_I _I I I I I I

■

Change

sign

key

Changes

the

algebraic sign

of

the

displayed

va

lu

e.

Example:

-1.265x15

Calculate

4.75-

714

ENTER

1.265

15

4.75

4

TOUCH DI

SP

LAY

■

Exchanges the displayed

va

lue w ith

the

va

lue

that

is in the ca

l-

culating r

eg

ist

er.

This exchange ei

ther

reduces key depressions

Exchange

key

or the use

of

the memory in

ce

rtain sequential calculation

s.

Example:

4+3

(6

X

2)

+ 7 - 5

.5

ENTER

6

2

7

5

4

3

TOUCH DISPLAY

9

Logarithmic

group

Computes:

Logarithms log10 and loge (In)

Ant

ilogs 1ox and ex

COM

Set log ba

se

NAT

Computing

common

lo

_

garith

'

ms

log10

Examples:

ENTER

Evaluate:

The

log

10

700

100

The

log

10 707 101

The

log

10 .

007

.001

Computing

antilogarithms

1Ox

Examples:

ENTER

Evaluate:

Th

e

antilog

of

3 3

The

antilog

of

-3

3 cs

10

The

anti

log

of

5.

5 5.5

TOUCH

C

ALL

LOG

TOUCH

C

ALL

■

LOG

■

LOG

■

LOG

DISPLAY

_~i,·,n11

-,

, , 7

-,.J

7n

, ,1 11 I I

I,_

I

_I

I I 1 ( I

DI

SPLAY

,n,-,n

11_/Ul.

1

n1/11

I

II

I I I I

COM

Set log base

NAT

Computing

natural

logarithms

Examples:

ENTER

Evaluate:

The

log

e 1

The

log

e 100 100

Computing

antilogarithms

ex

Examples:

ENTER

Evaluate:

The

anti/age

of

1 1

The

antilog

e

of

4 4

The

anti

/age

of

12

log

e (In)

TOUCH

C

ALL

LOG

TOUCH

C

ALL

■

LOG

■

LOG

■

LOG

Logarithmic

group

DISPLAY

I-

I

Ir

I l I I

Ir

I I I I I I I

_7

1

__

1 I

/_I

I

_I/_//_!

I_/

I

I I I I I

II

I I I I I !

11

I

11

I I I -I I I I I - , I

-I

~ - • - -

11

Trigonometric

group

12

Computes:

Trigonometric

functions

sine (SIN) cosine (COS)

tangent

(TAN)

Inverse

trigonometric

functions

arcsine (SI

N-

1) arccosi

ne

(cos-1)

arctangent

(TAN-

1)

Degrees

DEG

Set degree

mode

RAD

Computing

trigonometric

functions

Angles expressed in degrees

Examples:

The sin

of

30°

The

cos

of

45°

The tan

of

735°

The

sin

of

395°

ENTER

30

45

135

395

Note:

The signs

of

the

trig

functions

are

correct and depend on

the

quadrant

of

the argument.

TOUCH

Computing

inverse

trigonometric

functions

Results expressed in degrees

Examples:

The arcsin .577

The arccos .

9763

The

arctan 7.0427

ENTER

.511

.9763

1.0427

TOUCH

DISPLAY

nc

1_1

__

1

n,n,

lf/1/0

1

Ill/

I

I.

I

I_/

I I U O I U I I Cf I

DISPLAY

111

lrf-1(

/11/

lf/7

11·1

f

-I

I I I

-I

I

IO

I

..

- - -

Radians

DE

G

Se

t rad ian mode

RAD

Computing

the

trigonometric

functions

Ang

les expressed in radians

E

xamples:

The sine

of

.5

ra

di

an

Th

e cosine

of

.6532

radians

The tangent of

.875

ra

di

ans

ENTER

.5

.

6532

.875

TOUCH

Computing

inverse

trigonometric

functions

Results

exp

ressed in r

ad

ians

Examples

:

The arcsin 1

The arccos

.9876

The arctan 1.1254

ENTER

1

.9876

1.1254

TOUCH

Trigonometric

group

DISPLAY

n,,

,

,-,

1, , ,- , , , 1 , : , ,

f_/

0

-I

I

~I

-,

1~

I I , ' I I I -,

(J

'1-,,

/

,'

/ J / 1 1 I J J / / /

LI.

I I I I I

!,_

I I I

I I I I I ' I I t I I I

-,

I

I•

I

_I

,

11

I

_1

I I

DISPLAY

II

//1

/Ill

1

'I

'fl

/0 I

111

I I [ / I I I I I I

I I I I ! '

If

I " I I ' I I

I I I I I

11

I I

I!

I J I I

-.

n I

11

1 I I : I I I I -, I I I I

U0

CJ

I I

I,

I I /_

_Ii

I

I_-/

13

Victor

products

and

services

The

Se

ries

1800

is

only one

of

a vast family

of

products made by Victor, Ame

ri

ca's foremost

producer

of

desk-top figuring machine

s.

In

cluded in

it

s array

of

Victor 1800 Series Operating instructions

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