Bowmar MX 100 Instructions For Use Manual

,l.,lll '.

J.

1 il.

;

INTRODUCTION

ihe Bowmar MX 100 Scientific Brain utilizes recent deveiopments in solid-staie integrated circuitry to provide a vast extension of conventional slide-rule capabilities, with far more accuracy. It is also more versatile, and it is compact enough to be pocketable.

Jt replaces tedious and eye-straining correlation of finely inscribed slide-rule scales with a simpler lou ching of buttons on a keyboard. At the same time, it reduces determination of a.

numerical result to the reading of the numeral directly from a lucid display, It also supplements functions

01 a conventional log-Iog··decitrig slide-rule by t€3turing a memory that eases progress through complex multiple-operation problems.

Your new Brain operates in the algebraic mode and can accept a numerical input of as many as eight digits. It handles the four basic algebraic operations (addition.

subtraction, mUltiplication, and division) and those scientific functions listed below, all with full floating point.

1. Sine. cosine, and tangent of degrees or radians (depending on the setting of an external switch).

2. Inverse trigonometric functions of sine, cosine, or tangent,

3. Natural and common logarithms

4. Exponential functions (e~) and exponential powers (yX)

5. Square root (v'x) and inverse (Ijx)

6. Keys for 'iT and sign change

1

"..IdbJ

L diU,

t 5 U' ,ii!

I i

'--L.U

,1Ft:

7. A key for the exchange of contents of the display te~Jister (x regis tor) and working register (y register)

t8

In addition !o these functions, your calculator has memory with tho foflowin(J meaDs of access:

1. A storage key m tor storing a displayed numeral in the memory.

2. A recall key t:!m

for withdrawing and displaying the content of the rn8mOty tram the memory.

without losing it

3. An exchange key ~ tor 8Kchanging

7,

11 contents 01 the display and memory

4. A registers.

memory Clear key of the memof"Y.

m for discarding content

Your calculator also features capability for chain and automatic constant operations> Its display is right adjl,.,lsted with leadjng zero suppression. With algebraic operations, , results of up 10 sixteen digits may be obtamed by use of overflOW interpretation, With scientific operaEons, display results may contain up to six digits. the iast digit having a

±

1 tolerance,

To realize the full potential of the MX-IOO you are asked to carefully read the following material and instruclions. Optirnum familiarity

can

be gained only through frequent use, and as a start you are advised to foilow through eactl iJiustralive instruction with your calcu':ator in lwnd, During routine

use,

reminders

ot opemt(onal procedures

may be obtained from the brief outline of instruciions ptinted on tile back of the calculator.

2

II £JSL&14 UllIli.tdI aU)

OPERATION

AC Operation:

Set the switch on the back of the Charger/

Power Supply to the electrical outlet voltage, i.e., 115 or 230 Volts. Plug the

Charger into the outlet and the connector into the Calculator. (Note that the connector (s k'2yed.) AHer these connections, the power switch may be iurned on and operation started.

Baltery Operation-

Disconnect the Charger cord and turn the power switch "ON". With normal use a lull battery charge cao be expected to supply about <1 hours of working lime.

NOTE: When the low battery indicator

(L) on the display is lighted, do not continue battery operation. This indicates need for a battery charge.

Use of the Calculator can be continued during the charge cycle. Charging will continue whether calculator is on or ott.

Battery Charging:

Simply to!low the same procedure.

3S ir.

AC operation. The Calculator during the charge period may be used if desired. in order to iuily charge a baHer·y which has been completely discharg€.d, 7 hours is required. In most ca$e~".

an overnight charge should be adequate.

NOTE· AIU,ough no damage wiil r-esl)lt from prolonged periods winl tho Charger connected, (t i'2.

advisable to remove i.he

Charger when

it

is not in use or after a full recharge cycle.

CAUTION: To avoid possitlle damage, use only the charger provided with the calculator.

,:;::..\J£LJUIL.lI£,!

(it.U;; $IIU

h ,.

a LJ.t1

"..

M._.£.;

4 ..

~=-

3.

I.J

Jii

2£

- 5.

CONTROLS & INDICATORS

NOTE: Descriptions that follow wili be beller understood jf you take a moment to learn these basic facts.

First, two separate registers are provided for retaining the numbers you enler into the Calculator for an aritt,metic oper"atlon. One is the Display

Register which is aiso refened to as the x Register.

The other is Working Register or y Register. Any number you enter is keyed direcily into the

Display IX Register) for yOU! visual review. This entry is Hlen completed wrlen you key in the appropriate arithmetic operative (+, - .

x, or _C-_).

As you begin to enter the second number, ttle first is automatically transferred fom the x Register to the y Register. The y Register retalns this first number until you clear it or you exchange contents of the x and y Registers by means of a special key provided for that purpose.

Second, your Calculator Keyboard was designed for a minimum of keys in order to pro'liide optimum fingertip access within conven'lent confines. This feature was enabled by incorporating a block of dual purpose keys that work in conjunction with an electronic "shift" system.

Ttle electronic "shit\" of your calculator compares with the shift of a typewriter. Your calculator responds 10 the characters on the keys in its unshifted mode, and it must be shifted each time a keyis to be operated for a function printed above a key. The calculator's shift key is \dent(Hed

by tile lettel' ··F". ReIer to tile sec !Ion of

PRELIMINAi1Y INSTRUCTION for details of dual purpose Keys.

5

,j 2_ b4 w

1.

"ON" Switch A two position sllde switch that turns the

Calculator "ON" &

"OFF".

2.

OEG/RAD Switch A

two

position slide switch that selects degrees or radians for the expression of angles.

3.

Keyboard

25 keys that may be categorized into groups of data keys, arithmetic operation keys, memory operation keys, and command function keys as tollows:

A. Data Funclion Keys (all are dual-purpose and labelled ac.cordingly. Character mode refers to label on keyface, while Function mode refers to label situated directly above key.)

Key

Character

Mode Function Mode

\/i

Ilx l:) enters '.' a

(decimal)

Computes square root of a displayed number that is greater than zero.

Error condition is set for a

negative

number.

enters '0' Computes reciprocal of a displayed number.

Error condition is set for

a display of zero.

6

2

ElE g4SIil4i1JS£Jli

.CJ

iL

i.

1i2J]Jl!

e' o

LNX

EJ

LOG X

D

SIN-T

D

COS-T

D enters '1' Raises e(2.71828) to power of x shown on the

Display, up to x = 18.42.

a limit of enters '2' Computes the natural logarithm of any displayed number greater than zero.

Error condition is set for a negative number.

enters '3' Computes the logarithm

(base 10) of any displayed number greater than

zero.

Error condition is set for a

negative

number.

enters '4' Computes the arcsine, in degree or ra.dians, of any displayed number from 0 to ±1.

Error condition is set tor any other number.

enters '5' Computes the arcosine, in degrees or radians, of any displayed number from 0 to :±:1. Error condition is set for any other number.

,.ALa

.it)( enters

11Q. _A$.iP "

J

'6'

Computes the arc-

tangent, in degrees or radians, of any displayed number whether positive

, -, or negative.

a

SiN

D cos

D enters '7' Computes the sine, with proper sign, of any displayed angle, whether in degrees or radians and whether positive or negative.

enters '8' Computes the cosine, with proper sign, of any displayed angle, whether in degrees or radians and whether positive ar negative.

TAN

D enters '9' Computes the tangent, with proper sign, of any displayed angle, whether in degrees or radians and whether positive or negative.

B. Arithmetic Operation Keys a

Completes the previous operation and sets add command.

EJ

Completes the previous operation and sets subtract command.

Completes previous

operation and sets

'multiply' operation.

S

II.

£

Si.

•

•

Completes previous operation and sets divide command.

Completes previously entered add, subtract, mu(tiply, divide or instruction.

y'"

C. Memory Operation Keys

Clears the Memory to zero.

Adds the Displayed number to the content of the memory and stores the sum in the memory.

Displays the content of the memory. The content of the memory is not lost with this operation.

Exchanges contents of the x {Display} Register and the Memory.

D. Command Function Keys

9

During an entry it clears the entry with single depression. For

all

other operations, it clears all registers except the memory register with single depression,

•

a

It clears the overflow sign with single depression.

Enables a number y to be raised to a power x

(see pertinent

Instructions) .

Shifts between Function and Character Modes ot dual-purpose keys.

A dual-purpose key that changes sign of the

Displayed number in the

Character Mode, and displays

7T

(3.1415926) in the Function Mode.

Exchanges contents of x and y Registers.

4.

low Battery Indica\or Warns of need for battery charge during battery operation.

Appears as:

Minus Sign Indicator Appears as:

Error and

Overflow

Indicator

Indicates a condition or computation that the

Calculator is not

intended for or cannot

perform. Also indicates

Overflow.

Appears as:

10 dlL JLCii; Ji

!.tEUS

5.

6.

Decimal Point

Indicator

Function Mode indicator

Automatically appears to the right of any number entered, unless inserted in another sequence by use of the Decimal key.

Confirms shift of dual function keys from

Character to Function

Mode.

Appears as:

Charger Cord Socket

Charger/Power Supply

$ t

JtJ

PRELIMINARY INSTRUCTIONS

1.

To clear for new operation

A. Touch the

~ key two consecutive times to clear all registers

B. Cleared display will be:

.

2. To clear an incorrect entry

Example: 48

+

12 \s your calculatlon

A. You have already entered 48

Display is',

-t

'0,

11

LUi!

I

B.

Then you enter 13 ins.tead of 12.

Display is:

A mistake!

C. To clear 13, touch the once only.

Display is:

~ key

D. Then enter 12.

Display is:

E, Finally, touch the answer.

Display

'IS:

II key for

NOTE: An ~ncorrect entry should be cleared prior to any other entry or operation.

3. To enter a number

Example: enter 123.45

A.

Starting with the left-most digit touch keys as follows: 1,2,3, .,

4, and 5.

B.

Display will be:

123.45

_XU h.

.2

1 2

! _.

:

4. To enter a mathematical computation

Entry of a computation is greatly simplified when it is first converted to algebrnic form.

1.

438

+ 2\}6

2.

~

438

296

3.

438 x 296

4, 296) 438

In algobraic form, these computations are:

1.

438

3, 438

+

296 = x 296 ~

2.

438 - 296 ~

4.

438

'0'

296 ~

These computations are then entered a digit or operative at a time, beginnIng with the left-most figure and progressing to the right For full detalls refer to specific instructions and examples that follow.

5. Reading a numerical result

A. Results 01 etght digits or less are read directly from the Display.

B. In

certain computations, zeroes at the extreme right of a decimal result will be suppressed. For example, a result representing S16.30

may appear as:

16,3

C.

Results of more than eight but less than seventeen digits will appear with the overflow Indicator (described

under Conlrols & Indicators).

See

Instructions for Overflow

Inte rp retal ion.

Ii.

-La

Q

6. Dual purpose keys

Dual purpose keys are identified by dual labels. One label is directly on each keyface and is referred to as

Character Label. The other label is directly abo\'€ each key and is the

Function label. Thus, the dual labels suggest operation in either the Character

Mode or the Function Mode.

Normally the Calculator responds directly to the Character Mode of a dual purpose key. The response may be shifted to the Function Mode by first touching the iii key.

Touching the

D key shilts Calculator response to the Function Mode for the operation of one dual purpose key only.

Each subsequent use of Function Mode must be preceded by operation of the o key.

D key is touched to shift When the

Calculator response to the Function

Mode, a corresponding Function Mode indicator appears on the Display, Note that the Character Mode may then be re-established either by retouching lhe

D key or by completing a Function Mode operation.

1 a

-',ijULL.MJ

&

AUIB.! ;; II 14#£._

Ii ,.

tXt iJ

SAMPLE CALCULATIONS

ADDITION

Example #1: To calCUlate 16.39

Do these steps

+ 9.83

"= display will be a.

Touch

~ twice.

b.

Enter 16.39

c.

Touch a d. Enter 9.83

e.

Touch

I!I

Answer

16.39

16.39

9.83

26.22

Ex.ampte

~2:

To calculate 16

00 these steps

+

9

+

8.3

+

4.1

"= display will be

3.

Touch

k1I

twice b. Enter 16 c. Touch

II d. Enter 9 e. Touch a f.

Enter 8.3

g.

Touch

D

33.3

h.

Enter 4.1

i.

Touch m

L ?'ill

a

Answer

15 --

.

37.4

1

!

SUBTRACTION

Example ;'3: To calculate 12.81 - 3.6

=

Do these'Tsteps display will be a. Touch

~ twice b.

Enter 12.81

c.

Touch a d. Enter 3.6

e.

Touch

III

Answer

12.81

12.81

9.21

Example ::4:

To calculate 23 6

Do these steps

+ 2.1

-5~ display wU\ be a. Touch fi.J1

twice b. Enter 23 c. Touch

II

d, Enter 6 e. Touch a

1.

Enter 2.1

g.

Touch a

h. Enter 5

I.

Touch a

Answer

19.1

14.1 '

Example

ii5:

To calculate 62 - 82

Do these steps

+ 10 - 40 = display will be a. Touch

~ twice b. Enter 62 c. Touch a d.

Enter 82 e. Touch

II

20.

g.

f.

Enter 10

Touch a=I

10.

h.

Enter 40

I.

Touch a

Answ€r -

MULTIPLICATION

Example ::6 To calculate 29.32 x 56.5 "".

Do these steps display will be a, Touch

W twice

50.

29.32

b, Enter 29.32

c.

Touch

EI

29.32

56.5

d. Enter 56.5

1)

;

8. Touch

II

Answer 1656.58

DIVISION

Example #7: To calculate 61 -+3 -+9 =

Do these steps display will be a.

Touch

~ twice b.

Enter 81 c.

Touch

II

d.

Enter 3 e. Touch

II f.

Enter 9 g.

Touch

II

Answer

REPEATED OPERATIONS

Example #8:

Arithme1ic operations (add, subtract.

mUltiply, and divide) may be repeated on a single r1umber as follows (using 1he number

3 as an example).

Initial steps for each operation are a. Touch

W.

1wice to get b. Enter 3 to get then do these steps

DISPLAY WILL READ for for rl c. Enter

•

subtract multiply a

3.

3.

3.

or

II or

13

or

TOUGlliiI .-0.

, ..

I

.

0

,

...

~

9."

I

,

!

I

3.

1

1 for divide

.

e. Touch

II

9.

-3.

27.

0.3333333

-6.

81.

0.1111111

f.

Touchll 12.

g.

etc.

19

'_

18

;

CHAIN OPERATIONS

(Mixed Arithmetic)

Example #9:

To calculaltiI3+26) 15..-::,_49,_

38 -

Do these steps display will be a. Touch

~ twice b. Enter 73 c. Touch a d.

Enter 26 e, Touch

E:I

f.

Enter 15 g. Touch

II

L h.

Enter 49

Touch

II k.

J.

Enter 38

Touchl!"-

Answer

.

15.

1485.

1436.

. .

37.789473'

20

I

j

CONSTANT OPERATIONS

Addition, subtraction, mutipfication, and division by a constant may be performed as follows (using the number 'N' as the constant).

A. Addition

Ex.ample #10:

Do these steps display will be , a. Touch b. Touch

~ twice a c. Enter N

d.

Touch iii f.

e.

Entor the number X

Touch

Ell

N + X.

g.

Enter the number Y h. Touch iii

N + Y.

i.

Enter the number Z j.

lauen iii

}

k.

etc.

I

B. Subtraction

Example #11 :

a.

Touch

~

twice

b.

Enter 2N

21

.

.

N + Z.

2N.

c. Touch a d. Enter N e.

Touch iii f.

Enter the number X g.

Touch

II

!.

h. Enter the number Y

Touch

II!

j.

etc.

-

C.

Multiplication

Example ,~12: a.

Touch t1I twice b. Enter N c. Touch

EI d. Enter the number Y e. Touch

II f.

Enter

the

number

Z

g.

Touch

II h.

etc.

12

_ J i

/ ' a x -

N.

Y - N.

Y.

NxZ.

2

t

$if

•

D. Division

Example #13: b.

Enter c.

Touch d.

Enter e.

Touch twice a.

Touch ~ m

II

m

II

f.

Enter the number X g.

Touch

II h. E:nter the number Y i.

Touch

II j . etc.

XIN.

YIN.

FUNCTION OPERATIONS

Iuslng g key)

I Trigonometric Function

All trigonometric functions may be performed in degrees or radians, as determined by posltioning of the

DEG/RAD

switch.

A. Sine

Example #14: To obtain SIN 32 0

(set the DEGjRAD switch

Do these steps to DEG) display will be a. Touch

~ twice b.

Enter 32 degrees

23

-

G. TOUGh d. Touch

D

SIN

Ii

Answer

\ 32.

0.529919

Example #15:

To obtain SIN 4.4157 radians

(set the

DEG/RAD

switch to RAD)


~ twice b. Enter 4.4157

.

4.4157

G. TOUGhl]

SiN d. TOUGhS

Answer

\ 4.4157

0.95631

Example (:16: To obtain SIN (-198°)

(set the DEG/RAD switch to DEG)


W.

twice b. Enter 198 degrees 198.

c. Touchm, d. TOUGhl'il

SiN e.

TOUChD

Answer

-

-:

198.

198.

0.309017

;,

;

24

_ i . '_iJ.4.

B. Cosine

Example ;17: To obtain COS 32°

(set the o'EG/RAD switch to DEG)


t"i

twice b, Entor 32 degrees c. Touch d, Touch iii cos

D

Answer

\ 32.

0.848048

C, Tangent

Example #18: To obtain TAN 32°



~ twice b. Enter 32 degrees c. Touch d.

Touch

Ii

TAN

I]

Answer 0.624869

\I Inverse Trigonometric Functions

(degrees or radians)

A.

Arcsine

Example ,';"19; To obtain SIW' 0.529919


Do these s'\eps display wii!

be a, Touch

~ twice b. Enter .529919

, 0.529919

25

; .L

.'

c.

Touch

d. Touch iii

SIN-l a

Degrees

\ 1

0.529919

. 31.99998

Example ;20: To obtain SiN-I (- 0.529919)

Iset the DEG/RAD switch

Do these steps to DEG) ' b display will e a. Touch

~ twice

'. 0.529919 b.

Enter .529919

c.

Touch

~ d. Touch e. Touch

D

SIN-l a

Degrees

-.: 0.529919

",. 0.529919

-; 31.99998

B.

Arcosine

Example ;;21: To obtain COS1 0.848048

in Radians

(set the DEG/RAD switch to RAG)

Do these steps

, display will be a.

T auc £!I

twice b. Enter

.848048

c. Touch d.

Touch iii

COS1

D

Radians

0.848048

\ 0.848048

0.558505

-",__:.'•.•'.l.'__....

26

....: .2.Ji2i!U"··-

C. Arctangent

Example #22: To obtain TAN-) 0.624869


Do these steps display will be a· Touch

~ twice b. Enter .624869

c. Touch d. Touch

II

TAN-1

D

Degrees

0.624869

\ 0.624869

31.99999

III Exponenflal Function

Example /:23: To obtain e

Do these steps

-2.32

display will be a.

Touch

~ twice b. Enter 2.32

c.

Touch

~

" d.

Touch e. Touch

IJ

e'

D

Answer

-

2.32

2.32

2.32

0.098274

27

•• ,.J• •

I!il¥I!ilUI!il.

_

IV Natural Logarithm

Example

i24:

00 these steps

To obtain In 5·623 .

display will be a. Touch

~ twice b.

Enter 5.623

c. Touch d. Touch

D

LNX

B

Answer

\

5.623

5.623

1.726866

V

Common Logarithm

Example :(25: To obtain log\o 4.83

Do these steps

, display will be a. Touch

~ tWice b. Enter 4.83

c.

Touch d. Touch

D lOGX

EJ

Answer

\

4.83

4.83

0.683947

VI Square Root

Example ::26: To obtain "\/341.57

Do these steps display will be a, Touch

~ twice

341.57

b.

Enter 341.57

c. Touch d.

Touch

11

\. x

II

Answer

28

\ 341.57

18.481612

VII Reciprocal

Example #27:

To obtain the reciprocal of 638.72

Do these steps display will be a. TaUCrl

~ twice b.

Enter 638.72

638.72

c. Touch d.

Touch

VIII Pi (ee)

Q

1/'

D b.

TOUCh

Answer

\ 638.72

0.0015656

Example :::28: To obtain for the constant

7..

Do these steps a. Touch

~ twice a numerical readout display will be ,

D c. Touch t:.m

Answer 3.1415926

EXPONENTIAL POWER

Example #29: To obtain (35)3-2


Touch

~ twice c.

b.

Enter 35

Touch m gives the

natural log of 35

3.555349

d.

Enter 3.2

e. Touch

II

Answer

29

87300.83

$

r

MEMORY OPERATIONS

The following exercise is aimed at fami!arizing

you with memory operations and capability.

memory will contain

Do these steps a. Touch m b.

Touch em twice display will be

, ?

O.

O.

c.

Enter 250

250.

d. Touch

~ 250.

250.

250.

t

e.

Enter 300 louch

2 g.

Touch

EI

300.

300.

300.

550.

550.

550.

h.

Enter 120

i.

Touch j Touch

£

II

120.

120.

36000.

670.

670.

670.

k. Enter 50

I.

Touch a

1m m. Touch

670.

670.

670.

670.

n.

Touch

II

720.

720.

670.

o.

Touch p.

Touch q.

Touch

l.

-"

..

;.

LX

1m

E3

1;1

Answer itt 1 J!

_R

720.

O.

3j.1 _

t.¢'

TRANSFER X AND Y REGISTER

CONTENTS

The

~.~ t:i2 key offers many Possibiiities for use.

One of tt18se offered below.

Example #30: The problem 36 + 72 has been entered, and you decide fa change the number

36 to 35. Proceed as follows, first the problem: by entering

Do these steps

8. Touch

~ b. Enter 36 c. Touch

II d. Enter 72 display will be y register

36.

To change 36 to 35

8. Touch

£Ii

f.

Touch

~ once g.

Enter 35 h. Touch IiIAnswer 107.

72.

72.

72.

72.

i l L ] ]

31

MIXED PROBLEMS

Example ':31: do 36

Do these steps

+ 9

8 +~_

46 display will be a.

Touch ril b. Ellter 3 c. Touch

II d. Enter 46 e.

Touch n f.

Enter 8 g.

Touch

II h. Touch

I] i.

J.

Touch

Touch

II' r!I

EI k.

Enter 9

I.

Touch a

m.

Enter 36

0.0652173

8.0652173

1.1159028

37.115902

n. Touch !lAnswer

32

Example

i32:

find the antilog of .30103 (base 10)

A, One way is to raise 10 to the power of the logarithm as follows:


Touch

~ twice b.

Enter 10 c.

TouCh

!iI

(gives natural log of 10.) d. Enter .30103

e. Touch DAnswer

2.302585

0.30103

1.999999

~~x~amrjP~le~.~-:-3J3~:fdIO~~ffi13:~=]~

~

36

Do these steps a.

Touch m twice display will be b.

Touch;a memory will hold c.

Enter 36 d.

Touch e.

Enter 94 f.

Touch g.

Touch a

II

=:

-

58.

58.

O.

-58.

o.

O.

o.

O.

-58.

h.

Enter 36 i.

Touch

II

.

-58.

36.

15.

J.

Enter 15

I.

k.

Touch

13

Touch t!iliI

m.

Touch

iii

-

-

.

58.

1218.

-58.

-58.

-58.

-58.

58.

-1218.

n.

Toucht!3

o.

Touch

~ -1218.

-1218.

p.

Enter 36

-1218.

q.

Touchll r.

Enter 43 t.

s.

Touch

EJ

Touch t!iliI

u.

Touch

13

and

im

-

.

.

v.

Enter 36 w.

Touch

II x.

Touch y.

Touch z.

Touch

III

\ i X a

II

....

b .

; . .1

,j, Iti ; dO

7.

-1218.

1218.

8526.

36.

306936.

306936.

554.01805

-1218.

-1218.

'JJi, 1. o.

o.

o.

o.

o.

o.

, .Ail

1

Qt aa. Enter 36 o.

bb. Touchlil Answer

15.38939

O.

Example #34: do /1 O.684SIW 56 0 =

Do these steps display will be a. Sot DEG/RAD switch for DEGREES b, Touch

~ twice c. Enter 56

0. Touch e. Touch

13

SIN fJ' f.

Touch

~ g, Enter 2 h. Touch j,

Touch

II

EI

J.

Enter .684

I.

k. Enter

Touch m. Touch

II

I!

D n. Enter 1 o. Touch iii

35

\ 56.

0.829037

0.18749

0.687303

0.687303

0.684

0,4701152

-0,4701152

-0,4701152

0.5298848

:

2

p.

q.

Touch iii

Vi

Touch IJAnswer

\ 0.5298848

0.7279318

display will be memory will hold Do these steps a. Set DEGjRAD switch to DEGREES

.....

, b. Touch c. Touch

~ twice m d. Enter 7 f.

e. Touch

Touch iii

SIN

D g. Touch h.

Touch i.

Touch

J• Touch

EI

I!I

II

EI

k.

Enter B

I.

Touch m. Touch

I!I

m n. Enter 7

0.121869

0.121869

0.014852

~

0.0144792

0.0144792

o.

O.

O.

O.

O.

0.0144792

0.0144792

O.

o.

o.

o.

o.

o.

36

!L

I.

,UJ;

H;

o. Touch p.

Touch

Ii cos a

EI q.

Touch r.

Touch

II

s. Touch

II t.

Touch

13

u. Touch

liiJ

0.0144792

0.992546

0.0144792

0.992546

0.0144792

0.9851475

0.0144792

0.9778042

0.0144792

0.9778042

0.0144792

0.0144792

0.0144792

v. Touch IIAnswer 0.0144792

OVERFLOW INTERPRETATION

The positive or negative overflow indicator indicated by r or ( ,respectively, will appear when the dIsplay capacity of the calculator is exceeded.

For example, multiplication of two positive numbers,

12345678 x 345678 will give the following display

r

42676.292

The' r' symbol indicates positive 'overftow' and indicates an answer of more than B digits shown.

To obtaIn the correct decimal location for either case, simply record the displayed number and move the decimal polnt 8 places to the right.

The real answer will then be:

4,267.629.200,000.

L 8 places ..

j

This procedure applies to all operations. Use the a key to clear the overflow.

.J

L2 11

•

SPECIFICATIONS

Capabilities:

Algebraic Functions _. addition, subtraction, multiplication, division, reciprocals, square roots, sign change and

'C,

(31415926)

Scientific Functions exponential functions (c'L natural and common

10Qarithms, arcsine, arcosine, arctangent, exponential powers (y'), sine. cosine, tangent.

Memory Functions memory storage, memory recall, memory clear, exchange of memory content and display.

Miscellaneous exchange of x and y register contents, chain and constant operations, right adjusted display with leading zero suppression, overflow, low battery and scientific mode indicator,

Decima! Point:

Full floating decimal point.

Accuracy:

Algebraic Functions 8 digits.

Scientific Functions -- the 6 left-most digits shafl be correct to within ± i in the sixth digit from the left, including any suppressed zeroes.

Power:

AC Operation '110/120V, 50/60 Hertz:

Battery Operation NiCad Celis (3);

4 hour operation; 7 hour charge.

..,." & [' "1

38

1.1.1.11'1; - - -

Electronic Configuration:

Solid Stale -- primarily integrated circuitry plus certain discrete components.

Dimensions: 1 % in. H, 3 in.

W. 5 in. D.

Weight: 9 oz.

Accessories: Charger/Power Supply: Vinyl

Pouch: Instruction Book.

Calculation Speed: 3 Seconds Maximum

Operating "Temp.: O"C to 50"C

Storage Temp.: 20"C to

+

70 G e

Calculation Range: Up to 10 1 °-1

39

Ii.llIa.1• •

I~i

• • • • • • 2.ItK:

BATTERY NOTES

1. With normal use at room temperature, a full battery charge can be expected to supply about

4 hours of accumulated working time.

2, The Calculator may be used while its battery is charging.

3. Batteries that have been neither used nor charged for as long as 2 or 3 months will suffer substantial loss of operating time through a tendency to self-discharge. As a general rule. batteries lose about 1"/0 charge per day due to self-discharge.

at norma) temperatures.

4. For optimum performance and long life a. Alternate frequently between Battery and

AC power.

b. Operate at or near normal room temperatures.

c, Charge as soon as possible upon appearance of the Low-Battery indicator.

5. Recharge time is 7 hours for a fully discharged battery,

6.

The Low-Battery indicator is designed to appear as soon as battery voltage drops to the lowest value that will support optimum performance of the Calculator- Should further discharge occur, through continued operations or sell-discharge, the Low-Battery indicator may fail to appear.

Do nDI continue to operate on batterieS when this cDndition is noted, or a damaged battery may result.

7.

As a general rule, if improper operation occurs, first try the Calculator with its charger connected.

If operation is then normal, this indicates the batteries

are

low.

8. Do not store the unit in high temperature areas such as the top of radiators or the rear deck of automobiles exposed to the sun. The Calculator will operate satisfactorily over an ambient temperature range 01 0 to SOC {32to 122F) and relative humidity to 95%.

40

......

U £ ;; iv'

WARRANTY

Bowmar/ALl, Inc. WBrrallls to the purchaser of this neW Bowmar Calculator thai if the machine or any part thereof in the judgment of 80wmar is proven to be defective in material at workmanshJp wilhJn one year from date of original purchase, such defects will be repaired or replaced (at the Company's option) free of charge for parts and labor.

This warranty does nol apply 10 any product which has been damaged by accidenl or which has been misused, abused, altered, or repaired by anyone other than Bowmar.

This warranty is in lieu of all other warranties

expressed Dr implied, and no person is authorized to assume for Bowmar any other liability in connection with the sale of this product.

To obtain repairs, the Calculator should be delivered, prepaid, to Bowmar/AU, Inc. at address shown below, Please enclose $1,00 with the unit to cover shipping and handling.

ALI SERVICE CENTER

BOX 648

WEST ACTON, MASS. 01720

Printed in U.S.A.

li . J .

A920.900jB

Slk. #16503

No results