HP 25 Benutzerhandbuch

"The

success

and

prosperity

of

our

company

will

be

assured

only

if

we

offer

our

customers superior products

that

fill

real

needs

and

provide lasting value,

and

that

are

supported

by a wide

variety

of

useful

services, both

before

and

after

sale."

Statement

of

Corporate

Objective

s.

Hewlett-Packard

When Messrs.

Hewlett

and Packard

founded

our

company

in 1939,

we

offered

one

superior

product

, an

audio

oscillator.

Today

, we

offer

more

than

3,000

quality

products

,

designed

and

built

for

some

aT

me

wOrla s

most

alscernlng

customers.

Since

we

introd

uced

our

first

pocket

calculator

in 1972,

we've

sold

over

700,000

world-wide.

Their

owners

include

Nobel

laureates

,

astronauts,

mountain

climbers

,

businessmen

,

doctors,

students

,

and housewives.

Each

of

our

pocket

calculators

is

precision

crafted and

designed

to

solve

the

problems

its

owner

can

expect

to

encounter

through-

out

a

working

lifetime.

HP

calculators

fill real needs. And they

provide

lasting

value.

(Cover

background

courtesy

of

NASA)

Printed in U.S.A

HEWLETT

iJPAC

KARD

HP-25

Owner's Handbook

August 1975

00025-90001 R

ev

. C 8175

©

Hewlett-Packard

Company

1975

Contents

The HP-25 Programmable Scientific

Calculator

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

. . 5

Function

Key

Index

. . . . . .

..

. 5

HP-25

Memory

. . . . . . . . . . 6

Programming

Key

Index

. . . . . . . . . . . .. 6

The HP-25 Means Painless Programming 9

Manual

Problem

Solving

9

Programmed

Problem

Solving.

. . . . . . . . . . . . 10

Section

1:

Getting Started

..........

.

...

13

Display.

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

..

.

...

.

...

.

....

13

Keyboard.

. . . . . . . . . . . . . . . 13

Keying

In

Numbers

. .

..

. . . . . . .

..

...

14

Negative

Numbers

. 14

Clearing.

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

.

....

15

Functions

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

. . . . . . . . . . .

....

15

Chain

Calculations.

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

......

18

A

Word

About

the

HP-25

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

...

..

. .

..

. . . .

..

....

22

Section

2:

Controlling the Display .

Display

Control

Keys

Automatic

Display

Switching.

Keying

In

Exponents

of

Ten

......

. .

..

. .

Calculator

Overflow

........

. . .

..

.

....

25

. 25

.

..

30

..31

.33

Error

Display

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

.

...

. .

..

...

33

Section

3:

The Automatic Memory Stack

The

Stack

. .

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

. . .

Initial

Display

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

..

. . . . . . . . .

Manipulating

Stack

Contents

Clearing

the

Stack

The

mmm

Key

One-Number

Functions

and

the

Stack.

Two-Number

Functions

and

the

Stack.

Chain

Arithmetic.

Order

of

Execution.

Constant

Arithmetic

........

.

Section

4:

Function Keys

LAST X

........

. .

.35

....

35

.

..

35

.....

35

...

37

....

38

.40

.

..

40

.42

.

..

45

.

.46

..

49

.49

Prefix Clear

..

.

......

..

.

Numb

er

Alteration

Keys

Reciprocals

.

Square

Root

s

Squa

ring

.....

...

. .

Using

Pi

..

.....

. . . . . .

Percentages

..

...

.

..

.

...

.

...

. . . .

...

..

.

Storage

Registers

..

.

Trigonometric

Functions

Polar/

Rectangular

Coordinate

Conversion

Logarithmic

and

Exponential

Func

tion

s

Statistical

Functions

....

Vector

Summations

Section

5:

Programming

...

.. ..

.

..

...

.

What

Is

a

Program?

..

....

. .

..

....

...

..

..........

Why

Wr

ite

Programs?

. . .

....

..

. .

Three

Modes

of

Operation

Introductory

Program

.....

.

.. ..

. .

Running

a

Program

.....

...

.

GTO 00

.....

....

.

Writing

a

Second

Program

........

. .

...

. . . .

.......

. .

Interrupting

Program

Execution

....

. .

...

.

...

. .

...

. . . .

Branching

. . . . . . . . . . .

..

. . . . . . .

..

. . . .

Editing

a

Program

.

..

.

....

.

.....

.

Program

Applications

..

.

...

..

. .

..

.

..

.

..

....

.

...

..

. .

Afterword

...

.

.......

. .

50

51

52

53

54

55

59

62

63

66

70

73

74

75

78

79

82

87

91

97

99

Appendix

A:

Accessories, Service, and Maintenance

101

Standard

Accessories

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

.

101

Optional

Accessories

....

..

...

........

..

.

.....

..

......

101

AC

Line

Operation

..........

101

Battery

Charging.

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

...

. 102

Battery

Operation

.

...

....

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

103

Battery

Pack

Replacement

...

.

...

..

. . . .

..

. . . . . . . . . .

104

Service . . . . . . . . . . . . . . . .. . . . . . .105

Te

mp

era

ture

Range

..

106

Warranty

..

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

..

106

Appendix

B:

Improper Operations

Appendix

C:

Stack Lift and LAST X

Index

.. 109

....

111

.. .

.........

.

113

I

Function Key Index

Manual RUN Mode. PRGM-RUN

switch

PAGM..aJ

RUN

set

to

RUN.

FUnction keys pressed

from

the

keyboard

execute

individual

functions

as

they are pressed.

Input

numbers

and answers are displayed.

[@

Fi

xed display.

~

Percent.

Calculates

Followed by a

number

x%

of

y

(page

54)

.

key, selects fixed

point

notation

display

(page26).

~

Scientific

display.

Followed by a

number

key, selects

scientific

notation

display

(page

27)

.

@@

Engineering

display. Followed by a

number

key, selects

engineering

notation

display

(page

28).

~

Prefix key. Press

before

function

key

to

select

function

printed

in

gold

on

the

keyboard above

function

key

(page13)

.

• Prefix key. Press

before

function

key

to

select

function

printed

in

blue

on

slanted face

of

function

key

(page13).

00

Mean. Calculates

mean (average)

of

the

numbers

totaled by

Ell

in

storage register

R,

(page

67).

mJ

x

exchange

y.

Exchanges

contents

of

X-

and V-registers

(page

37)

.

oStandard deviation.

Calculates standard

deviation

using

numbers

totaled

by

Ell

in storage

registers R3

through

R,

(page

68)

.

mJ

Roll

down

. Rolls

down

contents

of

stack

for

viewing

in

displayed X-register

(page

36).

00

Reciprocal.

Calculates

reciprocal

of

the

number

in the

display

(page

52)

.

EStore

. Followed

by

number

key, stores

displayed

number

in

storage

register

(0-7)

specified. Followed

by

arithmetic

operator

key,

performs

storage

register

arithmetic

(page

55)

.

_Recall.

Followed

by

number

key, recalls

value

from

storage

register

(0-7)

specified

into

the

displayed

X-register (Page

55)

.

5

[]

Summation

minus.

Subtracts

values

from

storage

registers

R3

through

R,

for

correcting

Ell

summation

entries

(page

69)

.

Ell

Summation

.

Sums

numbers

in

X-

and V-registers

into

storage registers

R3

through

R,

(page

66).

I

PREFIX

IClear prefix.

After

~

, •

,E,

_

or

mm

'cancels

that

key

(page

50).

I:mD Copies

number

in displayed

X-register

into

V-register

(page

16).

I3mIChange

sign.

Changes sign

of

displayed

number

or

exponent

of

10

(page

14)

.

~

Degrees.

Sets

decimal

degree

mode

for

trigonometric

functions

(page

59).

I

REG

IClear registers.

Replaces

contents

of

storage registers Ro

through

R,

with

zeros

(page

56).

BEnter

ex

ponent.

After

pressing

,

keyed in are

ex

ponents

of

10

(page

31).

~

Radians. Sets

radians

mode

for

trigonometric

functions

(page

59).

[STK]

Clear

stack

.

Replaces

contents

of

X-

,

Y-

,

Z-

, and T-

r

egisters

with

zeros

(page

37)

.

.Clear

x.

Clears

the

displayed

X-

register

to

zero

(page

15)

.

~

Grads.

Sets

grads

mode

for

trigonometric

functions

(page

59).

ElElC8JEI

Arithmetic

operators

(page

16)

.

[EJ

Natural

logarithm

.

Computes

natural

logarithm

(base

e,

2.718.

..

)

of

value in

displayed

X-register

(page

63).

~

Natural

antilog

.

Raises e

(2

.718.

..

)

to

the

power

of

value

in

displayed

X-register

(page

63).

~

Common

logarithm.

Computes

common

logarithm

(base 10)

of

value

in

displayed

X-register

(page

63)

.

~

Common

antilogarithm

. Raises

10-

to

the

power

of

number

in

displayed

X-register

(page

63)

.

~

Rectangular

coordinate

conversion

.

Converts

polar

magnitude

and

angle

in

X-

and

Y-

registers

to

rectangular

x and y

coord

inates

(page

62).

~

Polar

coordinate

conversion

.

Converts

x, y

rectangular

coordinates

placed

in

X-

and

V-registers

to

polar

magnitude

and

angle

(page

62).

~

~[§]

Sine,

cosine

, and

tangent.

Calculate

the

sine,

cosine,

or

tangent

of

value in

displayed

X-register

(page

59).

Isino' I

§J

[t304]

Arc sine,

arc

cosine

,

arc

tangent.

Calculate

inverse

trigonometric

function

of

value in

display

(page

59)

.

~

Integer.

Leaves

only

integer

portion

of

number

in displayed

X-register

by

truncating

fractional

portion

(page

51

).

I

FRAC

I

Fraction.

Leaves

only

fractional

portion

of

number

in

displayed

X-

register

by

truncating

integer

portion

(page

51).

[KJ

Computes

square

root

of

number

in

displayed

X-register

(page

52).

0

Computes

square

of

number

in

displayed

X-register

(page

53)

.

~

Raises

number

in

V-register

to

the

power

of

the

number

in

the

displayed

X-register

(page

64).

I

ABS

I

Absolute

.

Gives the

absolute

value

of

the

displayed

number

(page

51).

I

.H

.MS I

Converts

displayed

decimal

hours

or

degrees

to

hours, minutes,

seconds

format

(page

60)

.

E!D

Converts

displayed

value

in

hours, minutes,

seconds

format

to

decimal

hours

or

degrees

(page

60).

I

LAST

X IRecalls

number

displayed

before

the

back

into

the

displayed

X-register

(page

49).

~

Pi.

Places value

of

pi (3.14159

...

)

into

displayed

X-

register

(page

53).

T

Z

Y

x{

HP-25 Memory

Automatic

Memory

Stack

}

5'''''''

Reg

;"e",

0,00

0,

[J

G

,

Exponent

of

10 sign

Sign

Mantissa

I

Exponent

of 10

,~+--

-

i.

-?

~

,5

& 1 B . 2 S

OFF.mmml

ON

PRGM.mRUN

I

X3Y

sin

cos

tan

hId

I~I

I~II

'~I

X;ty

INT

IT

yx

OM

'-LJI

FRAC

'+11

'-LJl

ABS

x=y

+H.MS

LASTX

PAUSE

~

" 0

II

I~I

'~I

_H

em

HEWLETT

·

PACKARD

25

} Display

Storage

Registers

Ro

"

R 1 I

R2

"M

R 3 I

~

5

-

R6

I I

R 7 I I

Program

Memory

Automatic

Stop~

00

01 13

00

02

13

00

03

13

00

04

13

00

05

13

00

06

13

00

47

13

00

48

13

00

49

13

00

Programming Key Index

PROGRAM Mode

PRGM-RUN

switch

set

to

:

PRGM

0IIII

RUN

Function

keys are

recorded

in

program

memory.

Display

shows

program

memory

step

number

and

the

keycode

(keyboard

row

and

location

in row)

of

the

function

key.

Active

keys:

In

program

mode

only

three

keys are active.

These keys can

not

be

recorded

in

program

memory.

1

PRGM

1

Clear

program.

Clears

program

memory

to

GTO 00

instructions

and resets

calculator

so

operations

begin

at step 00

of

program

memory

(page

78).

Automatic RUN Mode

PRGM-RUN

switch

set

to

:

PRGM.mIll

RUN

Function

keys may be executed

as

part

of

a

recorded

program

or

individually

by

pressing from the keyboard. Input

numbers

and answers are displayed,

except

where

indicated.

Pressed

from

keyboard:

1

PRGM

.1 Resets

calculator

so

operations

begin

at

step 00

of

program

memory

(page

78).

1 RIS 1 Run/stop.

Begins

execution

of

a stored

program.

Stops

execution

if

program

is

running

(page

83).

mI:J

Go to.

Followed

by

two-d

igit

nu';'ber

,

positions

calculator

to

that

step

number

of

program

memory.

No

instructions

are

executed

(page82)

.

6

Executed

as

a

recorded

program

instruction:

[R7SJ

Run/

stop.

Stops

program

execution

(page

83).

mI:J

Go to.

Followed

by a

two-digit

number,

causes

calculator

to

execute

the

instruction

at

the

specified

step

number

co

ntinue

program

execution

sequentially

from

there

(page

87).

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