Sears 10m User manual

INTRODUCTION
Your Sears Portable Electronic Calculator is light
enough and small enough to be used in one hand
yet it provides a standard keyboard and a light
emitting diode (LED) display that is easily read at
home or in the office.
The ten digit display and the full floating decimal
allow the calculation of most problems without
sacrificing accuracy, and the time-out feature
provides longer battery life between charges.
Your calculator has the ability to solve engineering
or bUdget problems, with such features as a
switch-selectable accumulative or fUlly accessible
memory, square root, reciprocal, percentage,
automatic constant, automatic squaring, and
change sign. The calculator operates In
"algebraic'" mode, which aflows you to perform
chain or mixed calculations in the order in which
they are written. The reciprocal and change sign
features are particularly helpfUl In solving complex
problems. 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 of operations is on the back
of the calculator.
ELECTRONIC CACULATOR GUARANTEE
We guarantee this calculator to work
properly, If i! does not, simply return it to our
nearest store and we
will:
During the first year, repair it,
free of charge,
(wherever you live in the United States)
SEARS, ROEBUCK AND CO.
OPERATiON:
Your calculator has rechargeable NiCd
batteries
included in the unit. The following
procedure should be followed for AC. and
battery 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 internal 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 5hours 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.
Battery Charging:
Simply follow the same procedure as in AC
operation. The
calculator may be used
during the charge period if desired. In order
to fully charge a battery which has been
completely discharged, 7hours is required.
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 afull recharge cycle.
CAUTION: To avoid possible damage, use
only the charger provided with the calculator.

aKey
I; Key
1m3 Key
mI Key
III Key
II Key
m -1iJ Keys
"ON" Switch
II
Key
II
Key
EI
Key
aKey
II Key
I!(
II
I[ Sem lOrn
111[. J
I:
III If ~ITJ m-:l\
II
i1m ffi'j] m ~ Bill
I i8mmm~\\\
18~~w~11
~mmmm
wmDmB
~ . -- -- .. =....-
2
CONTROLS AND INDICATORS
Turns CalculatorON &OFF.
Enters a "subtract" command
and performs any possible
preceding operation.
Enters a "divide" command
and performs any possible
preceding operation.
Enters a
"multiply" command
and performs any possible
preceding operation.
Enters an
"add" command
and performs any possible
preceding operation.
Completes previous operation
and retains appropriate
function
for aconstant
operation.
Changes the sign
of the
contents
of the display.
Enters adecimal point.
Enter
digits of anumber.
Adds the displayed number
to the Memory.
Subtracts the displayed
number from the Memory.
Displays memory content
without affecting the memory.
Clears memory without
altering
the information on
the display.

0.333333333
Completes a percent
operation and conditions a
markup or discount operation.
Automatically appears to the
right of any number entered,
unless
inserted in another
sequence by use of the
Decimal key. With
fractional
numbers, it will be preceded
by azero, Le. 1/3 will appear
as
Indicates anegative number
and immediately precedes a
number.
Appears as
Indicates
that while using the
calculator the keyboard has
been inactive
for apprOXi-
mately 30 seconds.
Appears in the center field as
Warns
of need for battery
charging.
II Key
Decimal Point
Indicator
Minus Sign
Indicator
Memory In Use Indicates that data is stored
Indicator in Memory Register.
Appears as
Low Battery
Indicator
Time-Out
• Indicator
When used once:
(1) During number entry,
clears the last entry and
recalls the previous entry
if one has been entered.
(2) During Time-Out, recalls
and displays the
information on the display
without affecting it.
(3) During overflow, clears
the overflow indicator.
During all other conditions
and also when touched twice,
this key will clear calculator
completely except memory
register.
When on
::; position, the
results provided by using =,
vx. ~ &%keys are
accumulated into the
memory.
Displays square root of the
entered number or completes
the preceding operation and
displays square root of the
result.
Displays reciprocal of the
entered number or completes
the preceding operation and
displays reciprocal of the
result.
Switch
II Key
iii Key
45

Special Battery-Saver Feature
If you do not actuate the keyboard for approx-
imately 30 seconds while performing a
calculation, the display will turn off
automatically, leaving only the "Time-Out
Indicator", previously described, on. This
feature decreases unnecessary power
consumption, and extends battery life
between charges. The displayed information
can be recalled by touching the !it key once,
The information or function mode Will not be
affected.
Overflow
indicator
Indicates a calculation result
that contains more than ten
digits.
Appears as
Note; A negative result of
more than ten digits can
indicate overflow as
,'\0
BATTERY NOTES
1. With normal use at room temperature, afull
batterycharge can be'expected to supplyabout
5hours
of accumulated working time.
2. The Calculator may be used whileits battery is
charging.
3. Batteriesthat have been neitherused nor charged
for
as long as 2 or 3monthswill suffersubstantial
loss
of operating time through atendency to
self-discharge.
As ageneral rule, batteries lose
about
1% charge perday due to self-discharge,
atnormal temperatures.
4. For optimumperformance and long life;
a. Alternate frequentlybetween Batteryand
ACpower.
b. Operate at or nearnormal room temperatures.
c. Charge as soon as possible uponappearance
of the Low-Battery indicator.
5. Recharge time is 7hours for afUlly discharged
battery, with the calculator off.
6. The LOW-Battery indicatorisdesigned to appear
as soon as batteryvoltagedrops to the lowest
value thatwill supportoptimum performance
of
the Calculator.Should furtherdischargeoccur,
through continued operations
or self-discharge.
the Low-Batteryindicatormay fail
to appear.
Do notcontinueto operate on batteries when
thiscondition is noted.
or adamaged battery
may result.
7. As ageneral rule, if improperoperation occurs.
first try theCalculatorwith its charger connected.
Ifoperation is then normal, this indicates the
batteriesare low.
8. Do notstore the unitin hightemperature areas
such
as thetop of radiators or the reardeck of
automobilesexposed to the sun. The Calculator
will operatesatisfactorilyover
an ambient tem-
perature range of
O· to 50°C (32° to 122°F) and
relative humidity
to 95%.
67

INSTRUCTIONS
1. To clear (erase) machine completely for
new operation
A. Touch the III key twice.
B. Cleared display will be:
2. To enter (write a number)
Example: enter 123.45
A. First,
clear by touching III twice
B. Then touch number and decimal keys
for 123.45 one at atime. Always start
with the left hand digit and progress
from left to right.
Display will then be:
123.45
Note: 1. Enter or obtain answers-
whole numbers up to ten digits:
1234567890,
2. Enter numbers less than one up
to nine digits to right of decimal.
(zero always appears to left of
decimal If number is less than
one.) 0.123456789
3. Enter decimal number up to ten
digits.
123.4567890
8
3. To clear ~n incorrect entry
Example: 48 +12 is your calculation
A. You have already entered 48
Display is:
B. You
now touch the akey
The display is:
C. Then you
enter 13 by mistake
The display is:
D. To
clear 13, touch the!! key once.
This erases
only the last number
entered (i.e. 13) and the previous entry
is displayed.
Display will be:
E. Then enter '12'
Display will be:
12.
F. Finally, touch the II key for answer
Display will be:
Note: Use PiS during or immediately
after entry of a number to clear
display. Use of !IIkey when a
result is displayed without overflow
clears the display.
9

CALCULATIONS
1. ADDITION
To calculate 16.39 +9.83 + 16 =42.22
Do these steps display will be
Note: When adding
or subtracting figures
with afixed decimal place, the
calculator will hold that decimal place
(decimal alignment).
Touch !!twice
Enter 16.39 16.39
3. MULTIPLICATION
To calculate 29.32 x56.5 =1656.58
Do these steps display will be
Touch
II
Enter 9.83
Touch II
Enter 16
subtotal
16.39
.9.83
26.22
Touch!! twice
Enter 29.32
Touch a
Enter 56.5
29.32
29.32
56.5
450.
6300.
6300.
1656.58
11
Answer
Answer
Touch II
Touch II
Enter 14
Touch II
4. DIVISION
To calculate 6300 -;- 14 =450
Do these steps display will be
Touch f!I
twice
Enter 6300
42.22
Enter 6
Enter 5
Touch II Answer
Touch. subtotal
TouCh.
Touch II Answer
2. SUBTRACTION
To calculate 23 -6 - 5 = 12
Do these steps display will be
Touch ~twice
Enter 23

29.95
29.95
179.95
179.95
1.4975
53.985
31.4475
.display will be
tax
Answer
30% discount
Touch II
Enter 5
Touch II
Touch II
Touch II
6. PERCENTAGE
(a) Add 5% tax to $29.95
Do
these steps
Touch !iI twice
Enter 29.95
(b) Take 30%,6%, and 2% discounts from
$179.95
Do
these steps display will be
Touch P!lI twice
Enter 179.95.
TOUCh.
\1 Enter 30
f.
Touch II
Enter 6
TouCh.
Enter 5
Touch II
Enter 8
Touch II
Enter 20
Touch.
Enter 8
Touch II
Answer
5. MIXED ARITHMETIC
To calculate (9 +6 - 5) x 8 _ 8 = _ 4
20
Do these steps display will be
Touch !iI twice
Enter 9
12 13

Answer
Enter 3
Touch
II
Touch II
Touch II
Touch a
Touch p:a twice
Enter 6
Touch
II
(b) Multiplication 6 x 2 =12
6x 5=30
6x12 = 72
Do these steps display will be
7. AUTOMATIC CONSTANT
(a) Addition 6+3+3+3=15
Do these steps display will be
Touch l!I twice
Enter 6
"Enter 2
12.6
54.6
7.5579
12t3JJ65
2.368142
118.4071
116.038958
2% discount
subtotal
6% discount
subtotal
Answer
Touch II
Touch II
Enter 2
Enter 6
Touch
II
TOuch.
Touch II
Touch II
Touch II
Enter 30
Touch II Answer
(c) Mark $42.
up by 30%
Do these steps
Touch
!I twice
Enter 42
Touch.
Answer
14
Enter 5
Touch
II
Answer

\67.
\23.
\23.
'. 12.
\11.
'. 12.
\90.
Touch a
Enter 6
17
8. MEMORY
To calculate (15 x6) -(12 +11) =67
Do these steps
display will be
Touch
!I twice
Enter 15
Touch
II
Touch
iI
Enter 12
Touch
II
Enter 11
Touch
II
Touch
&iii
"Touch
rim
Answer
243.
456.
Answer
Answer
Enter 12
Touch 1'1
TOUCh.
Enter 6
Touch
II
Touch
1'1
(3')
Touch
•
(3')
Touch
..
(34)
Touch
..
(3') Answer
Touch iii! twice
Enter 3
Touch 1!1 twice
Enter 36
(c) Division 36 -7- 6=6
456";" 6=76
Touch II
Enter 456
Touch II Answer
(d) Exponents 35=243
Do
these steps display will be

0.05
"218.94
"6.5682
"218.94
"225.5082
"'24.
"24.
"28.75
"30.96
"1.29
"5.75
display will be
Touch a
Enter 5.75
Touch
II
Enter 24
'"
Touch a
Enter 1.29
•Touch
II
Touch am
subtotal
Touch a
Enter 3
Touch
II
tax
Touch
II
Total
..
10. RECIPROCAL
1/20 =.05
Do these steps
Touch
!iltwice
Enter 20
Touch
113
Answer
19
$149.75
9.48
28.75
30.96
29,95
$218.94
6.57
$225.51
\12.
\ 9.48
"12.
\149.75
"0.79
display will be
NET AMOUNT
Touch
~ twice
Enter 5
Touch
II
Enter 29.95
5 $29.95
12 .79
5 5.75
24 1.29
18
Touch a
Enter .79
Touch.
Touch II
Enter 12
Enter 5
Sales Tax 3%
Total
QTY UNIT PRICE
9. ACCUMULATING MEMORY (2;)
~ switch to left position
Do these steps

Touch M twice
Enter 4
12. CHANGE SIGN
4x (- 3) = - 12
E426.7629279
This procedure applies to all operations:
Addition, subtraction,
multiplication, and
division.
Use the Mkey to
clear the overflow
indicator. The
displayed number can then be
multiplied or divided by asubsequent entry,
but ten decimal places must be added to the
result. Operation
of the Mkey the second
time will
clear the display.
E1.25
13. OVERFLOW INTERPRETATION
The overflow symbol will appear when the
display
capacity of the calculator is
exceeded. For example,
multiplication of
$12,500,000 x1,000 will give the following
"[:=" display.
The 'T': "indicates
"overflow" or an answer
of more than 10 digits. The digits other than
oare displayed. To obtain the correct
decimal location, simply record the displayed
number and move the decimal point 10 places
to the right. The answer will be:
12,500,000,000.
L.10 places ..r-
Overflow of anegative number is displayed in
a
similar manner, with the result preceded by
the minus sign. In the case of anegative
result
of more than ten digits, where none of
the trailing digits are zeros, the overflow is
indicated as
•
500.
125.
soo.
-12.
Answer
Answer
Touch E
Touch !is twice
Enter 500
Touch II
Enter 125
Touch II
Enter 3
Touch III
Touch II
11. SQUARE ROOT
'1'500 + 125 =25
20
21

Notes
on your special calculation
22
•
Notes
on your special calculation

SPECIFICATIONS
Notes
on your special calculation
24
Decimal Point:
Capacity:
Functions:
Power:
Main Elements:
Supplementary
Elements:
Dimensions:
Weight:
Peripherals:
Printed in U,S.A,
Full floating decimal point
Addition, subtraction.
mulij·
plication, division, and
omni-constant; percent,
square root, reciprocal,
Memory, change sign.
General add, subtract,
multiply,
divide and
percentage. Chain
multipli-
cation and division.
Constant multiplication,
division, addition, subtrac-
tion, percentage, fractions,
reciprocals, square root,
change sign, Memory.
Battery operation -
NiCd
batteries (3) 5 hour opera-
tion, 7
hour charge.
Large scale integrated
circuit
Bipolar ICs, Transistors.
Diodes
Height 1 V4 ", Width 3",
Depth 5%".
9oz.
Vinyl Pouch, Instruction
Book.
STK No. 16601
A907·902/0