National Semiconductor NS500 Instructions Manual

National

semiconductor

PRINTING

Q1LCU~TOR

INSTRUCTIONS.

NS500

POCKET

PRINTER

TABLE OF CONTENTS

LOW BATTERY: DIM DISPLAYORERRATIC PRINT 1
RECOMMENDED PAPER 1
INSTALLING THE PAPER · 2
NON-PRINT SWITCH 2
DECIMAL SWITCH 2

NUMERAL AND DECIMAL KEYS 2

CLEAR ENTRIES, CLEAR

ALL

tEl

c 3

ADDING MACHINE KEYS

: . . . . . . . . . . . . . . . . . . . . . . ...3

. 4

ADDITION

·.·········

.

SUBTRACTION

..

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4

REPEAT ADDITION/SUBTRACTION 5
MULTIPLICATION 5
DIVISION

.:

6

MUL

TIFACTOR

MULTIPLICATION/

DIVISION 7

CONSTANT MULTIPLICATION

;................

8
CONSTANT DIVISION 8
PERCENTAGES:

%'

9

THE MEMORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..

10

MIXED CALCULATIONS

10
INVALID KEY SEQUENCES WHICH INVERT
DIVISION

ENTRIES.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1·1·

EXAMPLES OF COMMON BUSINESS PROBLEMS

11

IMPORTANT-READ

BEFORE USING

YOUR

CALCULATOR

Your

batteries

come

from

the

factory

uncharged.

It is

important

to

the

long

lifeofyour

batteriestofully

charge

them

before

using

your

calculator

for

the

first

time.

Plugitintocharge

them.

A

full

charge

takes

about15hours.

Shut

the

on/off

switch

off

to

charge

batteries

faster.

Don't

worry

about

overcharging

your

batteries. If

you

leaveitpluggedinfor

more

than 15

hoursnoharm

willbedone,

butitis

recommended

that

youdonot

leave

your

calculator

plugged

into

the

charger

for

long

periodsoftime. The

batteries

lose

their

storage

capabilityifnot

allowedtooccasionally

discharge.
LOW

BATTERY: DIM

DISPLAY

OR ERRATIC PRINT

When

the

display

dimsorerroneous

symbolsordots

print,

the

batteries

need

charging.Donot

continuetouse

the

calculator

without

charging

as a

totally

discharged

battery

situation

should

be

avoided

for

longest

useofthe

batteries.

Charge

them

for30minutes

with

the

power

switch

off; then, you may useitin

the

non-print

mode

while

the

batteries

finish

charging

...

about8hoursofcharging

time

...

while

in use (5 hoursofcharging

timeifpower

switch

is

turned

off).

Charge

your

batteries

for

the

full15hours

with

the

on/off

switch

off

if

your

batteries

are in a

totally

discharged

state.

IMPORTANT:

Do

not

operate

your

printing

calculator

w:lhout

paper

because

doingsowill

possibly

damage

the

printing

mechanism.

PAPER SIZE:

Width

1.5 in. (38mm).

PAPER TYPES: NS038

paper

from

National

Semiconductor

or

1V2inch

thermal

paper

available at

retail

stores

whichislarger

in

diameter

requiring

the

larger

paper

tray.

Other

paper

may

damage

your

printer.

Your

calculator

uses

specially

treated

thermal

paper.

Store

paper

in a

cool,

dark

place. Purchase

replacement

paper

where

you

bought

your

calculatorororderbymailorphone

from:

NSC
MS 10A173
1120

Kifer

Road

Sunnyvale,

California

94086

Telephone:

408-737-3623

-

--

--------

YES

INSTALLING THE PAPER

1.

Remove

the

plastic

paper

tray

holder

from the

backofthe

calculator.Anextra traytoaccommodate

the

larger

core

size

paper

was

includedinyour purchaseofyour

calculator.

2.

Be sure

that

the

paper

unrolls

from

the

bottomofthe

roll and

not

the top as shown below; otherwise,noprinting

will

occur.

3.

Insert the

paper

into the

paper

feed path (slot in

backofthe

calculator). NUdge

the

paper

tape

with

your

fingertips

into

the

paper

feed path as you press I

ii,

the

paper

advance key. Do

this

until

the

paper

feeds

through.Donot

stick

long

fingernails

into

the mechanism.

4.

Replace the plastic

paper

tray. If

your

replacement paper i:; the

larger

core

type, use the

larger

plastic

paper

tray included

with

your

calculator.

If

the

Non

Print

switch is set at NP,

printing

will not

occur.

NON-PRINT SWITCH

Put

this

switch in the NP positiontoturn

off

the

printer

and use

only the display. This feature will

allow

youtosave

paper

when you

have no need

for

a tape.

DECIMAL SWITCH
THE FLOATING DECIMAL SETTING IS FOR MAXIMUM DECIMAL

NUMBERS IN THE ANSWER

Set the decimal

switch

at F

for

a floating decimal. A

floating

decimal

system

automatically

puts

the

decimal behind numbers as you key

them

into

the

calculator

until

you press the decimal

point

key • .

When the • is pressed

the

decimal

pointisfixedatthat

place and

further

numbers keyed into

the

calculator

during

that

entry are

entered as decimal fractions,

to

the

rightofthe decimal point.

Results are printed with as many decimal places

as

capacity

permits.

Set the decimal at the 2

place

setting and results are printed and

rounded

offattwo

decimal places.

NUMERAL

AND

DECIMAL KEYS

The numeral keys are numbered 0

to

9 and double zero. The

double

zero key,

00

,is

for

quick

dollars and

"no

cents"

entriesorfor

entries

with

many zeros.

The decimal key is pressed whenever a

number

being entered

contains a decimal. It is

not

necessarytopress •

after

entering a
whole number.
Numbers may be entered

wLth

up to 12 digits.

NO

2

CLEAR ENTRIES, CLEAR ALL

CEjc

This

keyislabeled

CE, an

abbreviation

for

clear

entry,

andC,an

abbreviation

for

clear

all.

Press

CE/

C

once

directly

followingamistaken

key

depression

and

the

depressioniserased.

Pending

multiplicationordivision

prob-

lems,

the

adding

machine

and

the

memory

are

not

cleared.

Only

the

mistaken

entryiscleared.Noprinting

occurs.

0 is

displayed.

Press

CE/c

twicetoclear

the

entire

calculator.OCprints.

ERROR

CONDITION:Eprints

Press

CE/c

twicetoclearanerror

condition

which

occurs

when

results

exceed12whole

number

digitsorwhen

keyispressed

too

fast.Anarrow

appearstoindicate

the

error

condition.

The

keys

will

not

operate

until

the

error

conditioniscleared.

ADDING MACHINE KEYS:

+ Press

to

add.

Repeated

depressions

continuetoadd

the

same

number

which

saves

time,

eliminates

re-entryofthe

same

number

whenitappears

repeatedly.

The

number

being

added

prints.

Presstosubtract

the

subtrahendorbottom

number,asit's

.writteninsubtraction.

The

minuend,ortop

number,isentered

on

+ .

Repeated

depressionsof-

cause

repeat

subtraction.

3

-_

..

-

-,~

...

,'

.'---"

.-~----

....

--

..

_---

T

Total

key

prints

the

contents

of,

and

also

clears

the

adding

machine.'

#/S

Non-Add

and

Subtotal

key

prints

the

contents

of.

but

does

not

clear,

the

adding

machine.'

This

allows

youtocheck

your

accumulationatany

intermediate

point.

The

non-add,

:#,

functionisperformedbypressing'#/S.directly

followinganumeral

key

entry.

This

functionisfor

printing

account

numbersorother

identifying

numbersonthe

tape.

See

second

example

that

follows.

'Pressing

S

or

T

clears

any

pending

multiplicationordivision

unless

the

S

or

T

depression

directly

precedes

= .

Division

problems

are

inverted

under

certain

circumstancesinwhich

division

is

combined

with

the

useofthese

keys. See

Section

INVALID

KEY

SEQUENCES WHICH INVERT DIVISION.