Bowmar 90512 User manual

WARRANTY
Bowmar/ALI, Inc. warrants to the purchaser of
this new Bowmar Calculator that if the machlne
or any part thereof in tile jUdgment of Bowmar
is proven to be defective in material or work·
manship within one year from dale of original
purchase, such defects will be repaired or
rep(aced (at the Company's option) hee 01
charge for parts and labor.
This warranty does not apply tc any product
which has been damaged by accident or which
has been misused, abused, altered, or repaired
by anyone other than Bowmar,
This warranty is in lieu of all olher warranties
exp/essed or implied, and no person is author-
ized to assume for Bowmar any other liability
in connection with the sale of this producL
To obtain repairs, the Calculator should be
delivered, prepaid, to Bowmar(ALI, Inc. at
address shown below In-warranty units will
be returned postage prepaid.
BOWMAR/ALI, INC.
531 MAIN STREET
ACTON, MASS. 01720
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MODEL
::>05)2
tOWfV1f\R

INTRODUCTION
Your calculator is light enough and small
enough to be used in one hand, but it provides a
standard keyboard and a light emitting diode
(LED) display that is easily read at home or in
the office.
The
eight digit displayand the full floating decimal
allowthe calculation
of any problem without
sacrificing accuracy.
Whether you
want to solve engineering or bUdget
problems,
your calculator hasthe ability with
features such as clearentry, automatic squaring, and
amanual
constant register that will perform integer
powers, reciprocals and fractions as well as chain
and mixed calculations.
Thebanery w\\l recharge inseven hours and operate
the calculator for three, but with the charger/power
supply no useful timewill be lostsince it operates
the calculatorwhile charging
it.
We suggest that this programmed Instruction Manual
be read with the calculator in hand. Performing the
operations as you read them will increase your
familiarity with
them. For a qUick reference, an
outline ofoperations is on the back of the calculator.
,
,
OPERATION
AC Operation:
Connect the Charger unit to any standard
120 Volt electrical outlet and plug the
connector into the Calculator. After the
above connections, the power switch may
be turned on and operation started. (While
connected to AC, the jnternal batteries are
automatically charged whether the
power
switch is "ON" or "OFF".)
Battery Operation:
Disconnect the
Charger cord and turn the
power switch
"ON". With normal use afull
battery charge can be expected to supply
about 3hours of working time.
NOTE: When the low battery
indicator
(L) on the display is lighted, do not
continue battery operation. This
indicates need for abattery charge.
Battery Charging:
Simply follow the same
procedure as in AC
operation. The Calculator may be used
during the charge period if desired. !n order
to fully charge abattery which has bee~
completely discharged, 7hours is reqUIred.
In most cases,
an overnight charge should
be adequate if the batteries have not been
fully discharged.
NOTE: Although no damage will result
from
prolonged periods with the Charger
connected, it is advisable to remove the
Charger
cord when the Calculator is not
in use after a full recharge cycle.
CAUTION: To avoid possible damage, use
only the charger provided with the calculator.

CONTROLS &INDICATORS
Enlerc> a "divide" command
Charger cord socket.
Charger/Power Supply .
Adds the entered number, or
carries out a previollsly
entered 'multiply" or "diVide'
command.
Adds a minus sign to an
entry. Subtracts the entered
nurnber or completes a pre-
viously entered "multiply" or
"divide" command.
Enters a decimal point.
Enter digits of a number
(limit 8 digits).
II Key
11
Key
EI
Key
aKey
II
Key
II Key
1. "ON" Switch Tu~ns Ca!culator "ON" &
"OFF".
2. "K" Switch Slide swHch with '2 positions:
in the up position, the 'K'
operation is in effect. Use of
'K' allows a number to be
entered and retained as a
"constant" for series tnulti-
p\icaHor. or divisinf\.
Clears the Calculator and the
display of all numbers.
Clears display of the previous
keyboard entry.
Enters a "multiply" command.
9. aKey
10'0-0 Keys
11.
12.
12.
11.
4.
3.
2. 1.
3.
~
8.
4.
~
6.
5.
~
6.
5.
7.
I
-------------
~
7.
I"8.
I
10. 9.
••,...... II'" '"
1.. 1II •=
b& A'V

BATIERY NOTES
I. With normal useat room temperature, afull
batterycharge can be expected to supply
about
3 hours of aCCumulated working time.
2. The Calculatormay be used while its battery is
charging.
3, Batteries that have been neitherused nor charged
for as long as 2or3 months will suffer substantia!
loss
at operating time through atendency to
self-discharge. As ageneral rule, batteries lose
about 1% charge per day due to self-discharge,
at norma! temperatures.
4. Foroptirnum performance and long life:
a. Alternate frequently between Batteryand
ACpower.
bOperateat or near normal room temperatures,
c. Charge as soon as possible upon appearance
at the Low-Bauery indicator
5Recharge time is 7 hours for afully 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 discnarge occur,
through continued operations or self~discharge,
the low-Battery indicator may fail to appear.
Do
not continue to operate on balteries when
this condition is noted, or adamaged battery
may result.
7, As ageneral rule, if improper operation occurs,
first try the
Calculator with its charger connected,
If operation is then normal, this indicates the
batteriesare low.
8, Do not store the umt in high temperature areas
such as the top of radiators or the rear deck of
automobiles exposed to the sun, The Calculator
will operate satisfactorilyover an ambient tem-
perature range of 0to SOC (32 to 122F) and
relative humidity to 95%•
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Activated by the. key for
operations with negative
numbers.
Appears as
Warns of need for battery
charge during battery
operation.
Appears as
Indicates a calculatlon result
that contains more than eight
digits.
Appears as
Automaticafly appears to the
right of any number entered,
unless inserted in arwther
sequence by use of the
Decimal key. With fractional
numbers, it will be preceded
by azero.
lndica\es an entry of more
than 8digits.
Appears as
Minus Sign
Indicator
Low Battery
Indicator
Overflow
Indicator
Error
Indicator
Decimal Point
Indicator
-
----_ ... ,---_#_-_.---------_ ... _------------~--
~

, O.
16:39 12.81
2. SUBTRACTION
Example #1 :To calculate 12.81 -3.6 =
Do these steps display will be
a. Touchll
b. Enter 12.81
CALCULATIONS
1. ADDITION
Example #1: To calculate 16.39 +9.83 ~
Do these steps display will be
8. Touch II
b. Enter 16.39
9.21
19.1
14.1
12.81
e, Touch II Answer
c. Touch III
d. Enter 3.6
Example #2: To calculate 23 - 6 + 2.1 ".' 5=
Do these steps display will be
a. Touchll
b.
Enter 23
,c
TouChll
Jd.
Enter 6
e. Touch.
f.
Enter 2.1
g.
TouChll
h.
Enter 5
iTouch
II
Answer
9.83
33.3
37.4
26.22
16.39
e. Touch III
d. Enter 9
c, TOUChlI
c. Touch III
d. Enter 9.83
f. Enter 8.3
g. Touch II
e. Touch III Answer
Example #2:
To calculate 16 +9+8.3 --t-- 4.1 =
Do these steps display will be
a. ToUChll
b. Enter 16
h.
Enter 4.1
i. Touch II Answer
•

186.
384.3
'. .6.1
,,' . 21.
Example #2:To catculate 3x21 X $.1 =::
Do these steps display will be
c. Enter 31
Example #3: To calculate 31 x 6 -
Use of 'K' Switch 31 x8.2 =
31 x7.6 =
Do these steps display will be
a. Touch II
b. Push 'K' on (up)
d. Touch 13
e. Enter 6
I. Touch II 1st Answer
g. Enter 8.2
a.
Touch II
•
b. Enter 3
c.
Touch II
"
d. Enter 21
e. Touch a
f.
Enter 6.1
9Touch II:
Answer
29.32
56.5
29.32
1666.58
. . C' 62.
• . O. '
.. ..611,
-20.
- 10.
Example #-3:
To calculate 62 ~ 82 +10 -40 =
Do these steps display will be
8. T6uch II
b. Enter 62
I. Touch III Answer
c. Touch II
d. Enter 82
e. Touch II
f. Enter 10
g. 10UChil
h. Enter40
3. MULTIPLICATION
Example #1; To calculate 29.32 x56.5 ~--=
Do these steps display will be
a. Touchll
b. Enter 29.32
c. Touch a
d Enter 56.5
e. Touch II Answer
4.0

181.
181.
117.
12.066666
.96.
c.
Enter 181
d. Touch
II
e.
Enter 15
t
Touch II
1st Answer
g. Enter 96
h.
Touch _ 2nd Answer
j
Enter 117
J. Touch
II 3rd Answer
k. Push
'K' off {down)
b. Push 'K' on (up)
e, TOIJChll
f. Enter 9
g. Touch III Answer
Example
#3: To calculate 181 ..;- 15::;:
Use of 'K' switch 96 -+- 15 =
117+15=
Do these steps display will be
a. Touch II
•
376.
376.
7.0943396
.254.2
'. ". 7 6
.'.. .
. • •. '....235.6
j. Touch II 3rd Answer
k. Push 'K' off (down)
e. Touch III Answer
4. DIVISION
Example #1: To calculate 37~ -;.- 53 ==
Do these steps display will be
a. Touch II
b. Enter 376
c. Touch II
d, Enter 53
h. Touch II 2nd Answer
i. Enter 7.6
Example #2: To calculate 81 -:- 3 9 ----
Do these steps display will be
a. Touch II
b. Enter 81
c. Touch II
0. Enter 3
• l
_ t

,
1'0 •.
.' 8.
'. '.' .10 ••
c. Enter 3
d. Touch II
e. Enter 3
b. Push 'K' on (up)
I. Touch II
g.
Touch II
h Touch II
6. EXPONENTS
Example #1: To calculate (3)5 "".
Do these steps display will be
a. -Touch II
g.
Touch II
",,' .
Touch II
"','
h.
i. Enter 8
j
Touch II
k.
Enter 20
I
Touch III
m.
Enter 8
n.
TouCh.
Answer
15.333333
-92.
-92.
Answer
c. Touch II
d. Enter 4
;
c. Touch II
b. Enter 9
1< Enter 23
5. MIXEDARITHMETlI;"
Example #1: To calculate :_~.". (-4) ':" (-"6);::;:;
!)o these steps display will be
~, Touch II
d. Enter 6
(9 +6 .. 5) x8
~..... ..... - 8 ~
20 ...
Do these steps display will be
a. Touch II
h. Touch II
Example #2:
To calculate
e. Touch II
f. Touch.
g. Enter 6
e. Touch III
f. Enter 5
-.

i. Touch II Answer 243. SPECIFICATIONS
j. Push 'K' off (down)
7. OVERFLOW INTERPRETATION
The overflow indicator "0" will appear when
the display capacity
of the Ca:lculator is
exceeded.
For example,
multiplication of
12345678 x345678
will give the following display
[ I 42676.292
The "0" symbol indicates "overflow", or an
answer of more than
the 8 digits shown. To
obtain the
correct decimal location, simply
record the displayed
number and move the
decimal
point 8places to the right The real
answer will then be:
4,267,!3?9.200,OOO.
L8 places.1"
This procedure applies to all operations, mul-
tiplication, division, addition and subtraction.
Use the' C ' key to clear the overflow.
DecimalPoint:
Capacity:
Functions:
Power:
Main Elements:
Supplementary
Elements:
Dimensions:
Weight:
Peripherals:
Full floating decimal point.
Addition, subtraction, multiplica-
tion, division and Kregister: 8
digits
in /16 digits out with underflow.
General add, subtract, mUltiplyand
divide. Chain multiplication and
division. Mixed arithmetic. Constant
multiplication and division. Expo-
nents, fractions, reciprocals.
A.C. operation-110/120V, 60 Hz.
Battery
operation-NiCd Batteries(3)
3houroperation
7hourcharge.
Large scale integrated circuit.
Mos
ICs, Transistors, Diodes.
Height·1%". Width 3", Depth SW'.
9oz.
Charger/Power Supply,
Vinyl
Pouch, Programmed Instruction
Book.
PRINTED IN USA
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