Texas Instruments TI-5015 Manual de usuario

TABLE OF CONTENTS

Page

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . .. . . .. . .. . . . .. .. . .. . . .. . . .. . .. . . .. . .. . . . .. . . .. . . . . 1

Electronic Printer Operation . .. . . .. . . .. . .. . .. . . .. . .. . . . . .. . . .. . . 2

BASIC OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Addition and Subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Error/Overflow Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Multiplication and Division . . .. . . . .. . .. . .. . .. . . .. . .. . . . . .. . . .. . . 8

Mixed Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operations with Grand Total Register

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

SPECIAL FUNCTIONS

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

Add Mode Calculations

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

Fixed Point Calculations

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

Multiplication and Division by a Constant

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

Percent Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

SERVICE INFORMATION . . . . . . .

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

Printing Paper Replacement . .. . . .. . .. . .. . . . .. . .. . . .. . . .. . . .. . . 23

Printhead Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Case of Difficulty

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

Calculator Exchange Centers . . .. . .. . .. . . .. . . .. . .. . . . .. . . .. . . . . 27

You

Need Service Information

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

APPENDIX

Conversion Factors

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

Inside Back Cover

USE ONLY TEXAS INSTRUMENTS TP-20225 OR TP-27225 THERMAL

PRINTING PAPER. OTHER PAPER MAY DAMAGE CALCULATOR AND

VOID WARRANTY.

IMPORTANT: Dim or partial printing may be remedied with the PRINTHEAD

CLEANING procedure on page 26 of manual.

IMPORTANT

Record the serial number from the bottom of the

calculator and purchase date in the space below. The

serial number is identified by the words "SERIAL NO."

on the bottom case. Always reference this information in

any correspondence.

Tl-5015

Model No. Serial No. Purchase Date

INTRODUCTION

This electronic desk-top printing calculator provides a high degree of

versatility and performance. Its unique construction is made possible by the

whisper-quiet, electronic printer (no ribbon) and reliable integrated circuits

pioneered by Texas instruments. The convenience of the calculator is

accented by its easy-to-use keyboard, independent add register, grand total

Texas Instruments, this calculator has been designed and built to provide

you with years of dependable service.

FEATURES

independent

Add

-Addition and subtraction with the familiar

entry sequence of standard business machines. Perform multiplication and

division without affecting previous add/subtract entries.

Grand

Total

-Automatically accumulates totals from the add

grand total

placed

the entry register for further calculations. Serves as

an accumulator for add/subtract totals.

Light

Weight-

Weighs less than

2V2

pounds for convenient operation at

work or at home.

Electronic

Printer

-Quiet, smooth-running electronic printer developed by

Texas Instruments prints up to

digits plus audit trail.

Repeat

Entry

-Once a number has been keyed into the calculator, it can

be entered as many times as you need by sequentially pressing an

operation key (

--).

Add

Mode-For easy entry of dollars and cents, select add mode for

automatic decimal positioning at two places or select floating point for

maximum accuracy.

Fixed

Point

Operation

- A fixed decimal point (from 1to 9 decimal places)

is selectable via keyboard entry.

Non-Add

Operation

-Prints reference numbers without affecting

calculations.

Percent

Key-

Permits easy calculation of percentages for add-on, taxes,

discounts and other problems.

Automatic

Constant

-Multiplication and division by a constant number

without reentering numbers.

Keyboard

Buffering -Enter additional numbers and functions while

calculator

still printing.

Two-Key Roll-Over-Lets you press a second key even before the

previously pressed key is released.

ELECTRONIC PRINTER OPERATION

The paper used by the electronic printer is a heat-sensitive (thermal) paper

(Texas Instruments TP-20225 or TP-27225). The only mechanical part of the

printer is a precision stepper motor which advances the paper past the

electronic printhead that is stationary. When printing, small semiconductor

(solid-state) elements are heated very quickly by electronic circuits and

produce color spots on the thermal paper. These spots form the numbers

and symbols you can read on the thermal paper.

Since the printer is basically an electronic device, it does

not

require special

ink ribbons or special maintenance. Using metal probes, sharp objects or

lubricants may damage

the

printhead or rubber roller. Please refer to

Service Information section of this manual for paper replacement

instructions and actions to take if a difficulty occurs.

NOTICE

THE PRINTING ON THERMAL PAPER MAY FADE IF

EXPOSED TO LIGHT OR HIGH TEMPERATURES FOR

LONG PERIODS OF TIME. FOR PERMANENT

STORAGE,

'NAYS

FILE PRINTED TAPES AWAY

FROM LIGHT AND

HEAT.

BASIC OPERATIONS

This desk-top printing calculator is quite simple

operate.

You

have

probably already used most of the functions successfully. However, there

are many valuable features of the calculator which are not obvious when

looking at the keyboard. The following descriptions and examples will assist

you in learning the detailed operation of your calculator.

INITIAL OPERATION

The calculator should be connected to 115 Vac/60Hz electrical outlet before

operating.

The power switch is located on the right side of the calculator. Push the

switch toward the rear ofthe calculator to apply power. Each time the power

switch is turned on, the calculator prints 0.T to indicate it iscleared and

ready for operation.

A paper advance

key[]]

allows you to run out extra paperto create space

between problems orfor tearing off the paper after completing a problem.

ADDITION

AND

SUBTRACTION

Numbers are keyed into the calculator in the same left-to-right sequence

that you read them. Addition and subtraction entries are made with the same

rapid-entry style as most standard business machines. A unique feature of

the calculator is that addition and subtraction entries are kept separate from

multiplication and division entries within the calculator. This feature is

made possible

the independent add register. The grand total register

accumulates totals from the add register and serves as a memoryfor add

Calculations.

The following keys are used to perform simple addition and subtraction:

Add

Key[±]

-Adds

the last entered number orthe last printed result to the

independent add register. A

"+"

symbol is printed tothe right

the number

added.

Subtract Key G - Subtracts the last entered number orthe last printed

result from the independent add register. A "- " symbol is printed

the right

ofthe number subtracted.

Non-add/Subtotal Key M - When used immediatelyfollowing a number

entry, the entered number is printed with

the"#"

symbol printed to the left of

the number. These numbers are for labeling only and are not entered into

the independent add register orthe grand total register and

not affectthe

calculation in progress. When the key is used immediatelyfollowing a

function

key,

the present subtotal

the independent add register is printed

with an

"S"

symbol printed tothe right of this subtotal. The contents

the

independent add register and grand total register are not affected

the

Mkey.

Total or Grand Total Key

- A single press of this key prints the total of

the independent add register with the "T" symbol printed to the right ofthe

total. This total is also placed

the entry register and the grand total

key also clears the independent add register so that the

calculator is ready for new addition and subtraction entries. A second

consecutive press ofthe

~key

prints the accumulated sum of all totals

from the independent add register with a

"G"

symbol on the right, clears the

grand total register and places the.grand total (GT)

the entry register for

further use if needed. The GT register accumulates totals from the

independent add register only when

the~

key is pressed. (See

Operations with Grand

Total

Clear/Clear-Entry

Key~

-When

used immediately following a number

entry, this key will clear the entered number and allow another number to be

entered

its place without affecting the independent add register or the

grand total register. Note thatthis key will not clear the independent add

~once,

automatically clears

the independent add register afterthe total is printed.

Pressing~

a second

time will cause the contents of the grand total (GT) register to be printed and

the GT register to be cleared. See Multiplication

and

Division for further

explanation of the

key.

The decimal point key is used wherever itappears

a number. When the

decimal is not entered, the calculator automatically prints the decimal point

to the right ofthe last number entered

when[±]

orG is pressed.

Example: 5.67 + 6 = 11.67

Enter Press Print

O.T

Set power switch to

5.67

[±]

5.67+

[±]

6.+

11.67T

After

the~

key is used, a new problem can be entered without manually

clearing the independent add register.

When a total is negative, a minus sign appears to the left ofthe total.

Example:

-8

3.21

-4.6 =

-9.39

Enter Press

a G

3.21

4.6

8.-

3.21+

4.6-

-9.39T

The repeat add/subtract feature ofthe calculator allows you to repetitively

add or subtract the same number withoutreentering the number.

Example: 4.59 + 4.59 + 4.59 - 6 - 6 =

Enter Press

4.59

[:±]

6 G

4.59+

6.-

ill@ 1.77T

A subtotal is desirable when you wish to obtain intermediate and final

results.

Example: 1.064 -.018 = 1.046

1.064 -.018 + 1.19 = 2.236

Enter

1.064

.018

1.19

Press

[:±]

ill@

1.064+

0.018-

1.0468

1.19+

2.236T

When used immediatelyfollowing a number entry, the M key will cause the

number

tQ.be

printed without affecting the calculation.

Example: A listing shows a certain rating number for six different items. Find

the total rating of item number

4 and

Item No. Rating No. Item No. Rating

No.

1 17 4 76

2 8.5 5 14.5

3 45 6 34

Enter Press Print

1 M

#1.

17 [:±]

17.+

4 M

#4.

76 [:±]

76+

6 M

#6.

[:±]

34.+

ill@ 127.T

Occasionally, you may catch yourself entering an incorrect number oreven

decide the numberyou keyed

is not wanted. When this happens,

the~

key can be used to clear the unwanted entry.

Example: 49.01 + 16.55 + 4.9 = 70.46

Enter Press Print Comments

49.01 rn 49.01+

16.555

Remove incorrect entry

16.55 rn 16.55+ Enter correct value

4.9 rn 4.9+

70.46T Total

Unwanted entries can also be effectively eliminated from the total value after

theITJ orG operation by simply using the opposite operation to cancel

the effect ofthe unwanted entry.

Example: 49.01 + 16.55 + 4.9 = 70.46

Enter Press Print Comments

49.01 rn 49.01+

16.555 rn 16.555+ Faultyvalue entered

16.555-

Faultyvalue removed

16.55 rn 16.55+ Correctvalue entered

4.9 rn 4.9+

70.46T

Total

If you accidentally

use~

when you intended to

useM,

the total is easily

reentered intothe independent add register with

the[±]

key.

However,

remember that each total

"T"

is summed to the grand total register.

Example: 156 + 65 + 320 =

541

Enter Press Print

156 rn 156.+

65 rn

65.+

221.T

rn 221.+

320 rn 320.+

541.T

If you frequently perform calculations involving dollars and cents, you may

wish to use the convenient add mode feature of the calculator described

later

this manual.

ERROR/OVERFLOW CONDITIONS

You

can enter up to 10 digits into the calculator. If you enter

or more

digits,

entry overflow occurs which causes the calculator to clear the first

digits entered and print ERROR. However, if the 12th, 13th, etc., digits

have been entered, they are accepted as part of the new entry. When this

occurs, press 1™and you can reenter a number that has 10 or less digits

without affecting previous entries.

Example: 123456.7899 + 555765.4321 = 679222.222

Enter Press Print Comments

123456.7899 rn 123456.7899+

5555765.4321 ERROR

digits entered

1 ™ Clear for new value

555765.4321 rn 555765.4321+ Correct value entered

[!fill 679222.222T Total

A register overflowwill also cause ERROR to be printed. If the accumulated

contents ofthe add registers are larger than 9999999999

Odigits) or

-999999999

(9 digits for negative results), ERROR

Tis

printed and the

contents of that register are automatically cleared.

Example: 9,999,999,999 + 1 = Overflow

Enter

9999999999

Press

9999999999.+

1.+

ERRORT

If grand total overflow occurs, the calculator prints ERROR G, skips a line

and clears the grand total register. The independent add register and entry

Enter Press Print

3333333333 rn 3333333333.+

[!fill 3333333333.T

4444444444 rn 4444444444.+

[!fill 4444444444.T

5555555555 rn 5555555555.+

[!fill 5555555555.T

ERRORG

The calculator uses

5/4

round off for 10-digitpositive or 9-digit negative

results. This means that an internal result of

-999999999.4

will round off to

-999999999.

However,

-999999999.5

will round upcausing an overflow. In

addition, the round off operation occurs with each entry. If thevalue 0.4 is

added to 5555555555, the internal result is rounded off immediately to

5555555555 again as if the 0.4 were never entered.

MULTIPLICATION

AND

DIVISION

Now that you are familiar with the addition and subtraction keys on the

keyboard, the multiplication and division at the top of the keyboard will be

described.

Keep in mind that multiplication and division operations are independent of

addition and subtraction. The summing of a column of numbers can be in

progressand

intermediate calculation involving

00,

e±::I

and[§]

can be

performed without affecting the summing operation. See Mixed Calculations

for further explanation and examples.

The four basic keys concerned with multiplication and division are:

Multiply

Key

-Causes the last entered number or last printed result to

be printed

the multiplicand with a

"x"

symbol printed to the right of the

number.

Divide

Key

e±::I

-Causes the last entered number orthe last printed result

to be printed

the dividend with

a"+"

symbol printed to the right of the

number. Division by zero is invalid and will cause ERROR to be printed.

Equals

Key[~

-Completes multiplication or division. When used

following multiplication or division, the last entered or printed number is

printed as the multiplier or divisor with an

"="

symbol printed to the right of

the number. Then the result is printed with no symbol tothe right.

Clear/Clear-Entry Key

@lg~

-When used immediately following a number

entry, this key will clear the entered number and allow another number to be

entered in its place without affecting previous entries. When used following a

G:J

entry, or pressed twice after a number entry, a

"C"

symbol is

printed to indicate that the multiplication or division problem has been

cleared and the calculator is ready for entry of a new problem. In mixed

calculations, this key will not clear the independent add register or grand

total register.

Multiplication and division problems are quite simple to solve since most

problems maybe entered in the same order they are written.

Example: 24.3 x 15 = 364.5

Enter Press

24.3

Example: 130

..,._

6.5 = 20

Enter

130

6.5

[§]

24.3x

15.=

364.5

130-;-

6.5=

20.

Notice that it is not necessary to press

[CZ"~

after a problem before starting a

new problem when

the[§]

key is used.

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