OWNER’S MANUAL
6518206
Please read before using
BIG Display 12 - Digit
Scientific Calculator
with
Fractional and Statistical
Functions
Keys
FEATURES
ON: Turns the power ON and resets the calculator. The
power turns off automatically after a few minutes if no key
is pressed. The memory is not reset when ON is pressed.
Large 10 + 2 Digit Display
OFF: Press to turn OFF the calculator.
Calculates Mixed and Improper
Fractions
C/CE: Press to delete a number in the display, Press
twice to clear the current calculation.
Up to 15 levels of Parenthesis
EXP: Exponent key. Press to enter exponents
Ex. 40X10 22 Press 4 0 EXP 22 (40 22 ) is displayed
Binary / Octal / Decimal /
Hexadecimal Calculation Modes
+/– Changes the sign of the displayed mantissa and
exponents
Common and Natural Logarithms
Advanced Statistical Functions
Boolean Logic calculations
Auto Power off saves batteries
Battery powered
>
Backspace Key : Clears the last digit from the display
and shifts the other digits to the right.
Mode Select Keys
INV: Press to perform the function above the keys.
MODE: Press to select the calculation mode.
Then press 1 – 5 to select the Mode:
Press
Mode
Displayed
Protective Case
1
2
3
4
Decimal
Binary
DEG
BIN
Folding stand for best viewing
angle
Octal
OCT
Hexadecimal
Statistical
HEX
5
SD DEG
Display Mode Keys
4
5
Display Mode Keys
Basic Functions
FLO – SCI – ENG Press to select the display mode.
+, –, x, ÷ keys
Press keys as written for basic functions.
FLOATING: Floating Point
SCI: Scientific Exponential
ENG: Engineering Exponential
Ex. 123456
Ex. 1.2345606
Ex. 123.45604
% key
Press for percentage calculations, Add-on and discounts.
Display Range
(…) Open/Close parenthesis keys
Press for up to 6 levels of parenthesis when performing
complex calculations.
Floating Point :
Scientific:
10 -9 –> 1010
10 -99 –> 10 100
Up to 15 consecutive open parenthesis may be used at one
time.
Engineering
Mantissa:
Exponential 10 -99 –> 10100
Less than 100
Notes:Open and close parenthesis must be used together,
If only one is used, the calculation will be incorrect.
Decimal Point
Press MODE, then press DRG to set in DEG mode.
Press INV and press FIX then a number from 0 to 9 to set
the number of numbers to the right of the decimal point.
Press INV and press FIX then . (decimal point) to reset
the Decimal point location.
Fractions
Accepts fractions and calculates with both mixed and
improper fractions. Answers are given in mixed fractions.
ab/c Fraction key: Press to enter fractions as shown:
DRG: Degree/Radian/Gradient Mode Key.
Press to change the angle units.
Improper fractions A/B:
Numerator ab/c Denominator
Ex. 6 ab/c 7 = 6/7
Up to 6 digits may be used for the numerator, 3 dig-
its for the denominator.
DRG> : Angle Conversion key.
Used with INV key to convert angle values to
different units.
200GRAD= 180 degrees = Pi RAD
<<6_| 7>> is displayed
6
7
Mixed Fractions
Memory Keys
Enter: Integer ab/c Numerator ab/c Denominator
Ex. 4 ab/c 6 ab/c 7 = 4 6/7
M+
Press to add the displayed number to the inde-
pendent memory
4_ 6_| 7 is displayed
Up to 3 digits may be used for the Integer, numerator or
denominator up to a total of 8 digits.
Min
pendent memory
Press to store the displayed number in the inde-
MR
Press to recall the number in memory.
Press ab/c to change the displayed number from a fraction
to a decimal number.
X–>M Display/Independent Memory Exchange key.
Press to exchange the displayed number with the contents
of the independent memory and vice versa.
d/c Mixed/improper fraction key
Press to convert mixed fractions to improper frac-
tions:
Binary/Octal/Hexadecimal keys
Press
Displayed
Enter numbers with the following keys:
10 ab/c 3
10 _| 3
Binary Keys
Octal keys
0 – 1
0 – 7
INV d/c =
3 _ 1 _| 3
Hexadecimal keys
Remember to first press:
0–9,A,B,C,D,E,F
INV d/c 10 _| 3
MODE 2 for Binary, MODE 3 for Octal,
MODE 4 for Hexadecimal.
X<–>Y key. Press to reverse the operand and the operator
for multiplication and division.
123 x 456 ÷ 789 INV X<–>Y =
(0.01406718)
NEG key: Press to change to the complement in
Binary/Octal or Hexadecimal modes. Press again to
change the complement back to the original value.
BINARY – MODE 2
Press 101010 NEG
1111010110. is displayed
7777654322. is displayed
FFFF876544. is displayed
Octal – MODE 3
Press 123456 NEG
Hexadecimal – MODE 4
Press 789 A B C NEG
8
9
Statistical keys
Function Keys
ARCHYP – ArcHyperbolic key
Variable Entry (DATA)
Variable Correction (DEL) key
⌺x key
HYP – Hyperbolic key
sin - Sine key
cos - Cosine key
tan - Tangent key
n key
n
key
n-1
In - Natural Logarithm key
x
key
2
e
- Exponential function key
⌺x key
2
x
- Square key
–1
xʳ key
sin - Arc Sine key
Logical calculation keys
–1
cos - Arc Cosine key
–1
Used for Logical calculations in Binary, Octal and
Hexadecimal modes
tan - Arc Tangent key
log - Common Logarithm key
10x - Common exponential key
Ö- Square Root key
AND OR
XOR XNOR NOT
1/x - Reciprocal key
Display Indicators
DMS – DEG
The following indicators will appear when the
respective function is selected
Sexadecimal -> Decimal conversion key
R–>P, P–>R
Rectangular->Polar Coordinate key
y
Display
Mode
x
- Raise to power key
INV
HYP
BIN
OCT
HEX
Inv
p - Pi key
Hyperbolic
Binary Mode
Octal Mode
Hexadecimal mode
3Ö- Cubic Root key
x1/y - Multiple root key
n! - Factorial key
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Display
Mode
Mode
+, -, x, ÷
Hexadecimal
Statistical
6 levels
3 levels
SD
Statistical mode
Degree Mode
Radian mode
Gradient mode
Calculation in Parenthesis
( )
y
y
n
n
y
y
y
y
n
y
DEG
RAD
GRAD
( )
Constant
Percentage
Fractions
Memory
Function
1 variable function
2 variable function
Raise to Power
Statistical
Calculations modes
n
n
n
n
y
y
n
y
y
n
y
n
n
y
Mode
Decimal
Binary
Octal
+, -, x, ÷
( )
6 levels
6 levels 6 levels
15 levels 15 levels
15 levels
Constant
Percentage
Fractions
Memory
Functions
1 variable
2 variable
Raise to Power
Statistical
Logical
y
y
y
y
y
n
n
n
y
n
n
n
Logical
Complement (NEG)
+/–
Display
(FLO, SCI, ENG)
Decimal (Fix)
Angle
n
n
n
y
y
y
y
y
y
y
y
y
y
n
n
n
y
n
y
n
n
n
n
y
n
y
n
Reverse
Complement (NEG)
+/–
n
y
Display
(FLO, SCI, ENG)
Decimal (Fix)
Angle
y
y
y
y
n
n
n
y
n
n
n
y
Reverse
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13
Entering Statistical data
Calculation priority
Calculation priority is automatically determined by
the calculator. Algebraic expressions are entered as
they would be written.
Ex. 1: 2 DATA
Ex. 2: 125 LOG DATA
Ex. 3: (123 M+ MR DATA)
3 DATA
4 DATA
100 LOG DATA
Single variable functions and calculations in
parenthesis have a higher priority than basic func-
tions like +, -, x, ÷.
Making corrections
During calculations lower priority calculations are
stored in the stack memory and processed in turn.
Six levels of calculations may be stored in stack
memory.
C/CE clears the last digit pressed.
INV DEL deletes the last DATA entered.
Output of Statistical Calculation Results
Calculation range
Output
Operation
A maximum of 9 digits in the mantissa or 10 digits
plus 2 digits for exponent may be entered. If a result
is too large to display, an Error indicator appears.
This applies for Decimal/Octal/Hexadecimal modes.
Arithmetic mean
Standard Deviation of sample
INV xʳ
n-1
INV
n
Standard Deviation population parameter
Variance of Sample
INV
Statistical calculations
INV n-1 x2
INV n x2
Press MODE 5 to enter Statistical Mode. This clears
all function commands and all registers except the
memory.
The results of statistical calculations are stopped in
the statistical calculation memory. As a result, you
can perform statistical calculations again by exiting
to another mode and then resetting the calculator for
statistical calculation mode.
Variance of Population
Sum of data
INV ⌺x
Sum of Squares of data
INV ⌺x2
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Performing Logical Calculations
Truth Tables
AND
INPUT
B
OUTPUT
X
Logical Calculations are performed with Boolean Algebra.
Variables in logical calculations have only two values,
True and False. Truth is represented by a “1” and False is
represented by a “0”.
A
1
1
1
0
1
0
For Octal or Hexadecimal calculations,
the values are converted to Octal or Hexadecimal.
0
0
1
0
0
0
Type of logical calculations and truth tables
OR
INPUT
B
OUTPUT
X
A
AND: Product of propositions
Produces 1 when all input values are 1.
1
1
1
0
1
1
OR
Sum of propositions
0
0
1
0
1
0
Produces 1 when one or more input values are 1.
XOR Exclusive Sum of propositions
Produces 0 when all input values are either 1 or 0. (Other
cases acts as an OR)
XOR, XNOR
INPUT
B
OUTPUT
A
X OR X NOR
XNOR Exclusive sum of propositions
Combination of XOR and NOT
1
1
1
0
0
1
1
0
0
0
1
0
1
0
0
1
NOT
Negation
Produces the opposite value of the Input.
Examples:
NOT
INPUT
OUTPUT
1100 AND 1010 =
1100 OR 1010 =
1100 XOR 1010 =
(1000.)
(1110.)
(110)
A
1
X
0
0
1
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Examples
Errors
The calculator will overflow if::
Constant Calculations
• Calculation or contents of the memory are outside the
EX. 4 + 5 = 5 + 5 = 6 + 5 =
range of 1 x 10 –99 to 9.999999999 x 10
–99
Press 4 + 5 =
5 =
6 =
• When dividing by 0.
Binary
Octal
• When data exceeds the range of any function or statis-
tical data
MODE 2
10101011 + 1100 + 1110 = 11000101
• In Statistical calculation mode, if n-1 is calculated
with only one data
• When finding x,n and n-1 when =0.
MODE 3
• When the number of calculation nesting levels exceeds
3 in statistical mode
654 + 321 = 1175
741 – 357 = 362
• When more than 15 open parenthesis are used at one
time.
Hexadecimal
MODE 4
In these cases the calculator stops and displays E. Press
C/CE to resume.
AAA + bb + C = b71
dEF - EFE = FFFFFFFEF1
FEDC x A9 = A83F3C
Binary/Octal/Hexadecimal mode calculations may be
mixed.
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19
Hyperbolic Calculations
Cosh34 =
Trigonometric Functions
Press
Displayed
53 sin (0.79863551)
3 4 HYP cos
(2.917308713 x 1014)
(58.66323961)
Sin53º
[Mode][DRG] DEG
Tan 65grad[Mode][DRG] GRAD 65 tan (1.631851687)
Cos22 [Mode][DRG] RAD 22 cos (-0.999960826)
Inverse Hyperbolic Calculations
Sinh-1 1.5 x 1025 = 58.66323961
1 . 5 EXP 2 5 INV HYP sin
Inverse Trigonometric Functions
–1
Sin 0.3 [DEG] . 3 INV sin-1
(17.45760312˚)
(36.86989765˚)
-1
Cos 0.8 [DEG] . 8 INV cos-1
Logarithmic Functions
Log 123= 1 2 3 log
In 123= 1 2 3 In
(2.089905111)
(4.812184355)
Statistical Calculations
DATA
Enters statistical data
Displays Sum of the data
Exponential calculations
e22 =
102.3
2 2 INV ex
(3584912846)
(199.5262315)
n
Displays the number of data
x
=
2 . 3 INV 10
n-1
Displays the Standard deviation
sample
Reciprocal Calculations
1
2x3+4 = 0.1 2 x 3 + 4 = 1/x
Displays the Square sum of the data
Displays the Mean value of the data
(0.1)
Factorial Calculation
(4x2–3) ! = 120 4 x 2 – 3 = INV n!
Displays the Standard deviation
population parameter
(120)
Trigonometric Calculations
Cosec x =
1
Sin x
[DEG] 4 5 sin 1/x
(1.414213562)
Note: In scientific mode the results may be dis-
played in the form of exponent
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CIVIL ENGINEERING
APPLICATIONS AND EXAMPLES
In this right triangle,A = 5.7 feet and a = 30 degrees.
Determine the value of C.
BUSINESS
Calculate the future value of a $1000 investment
compounded annually at a rate of 6% for 7 years.
sin a = A / C
sin 30 degrees = 5.7 / C
C = 5.7 / sin 30 degrees
C = 5.7 / .5
n
FV
=
p (1+i)
7
=
=
1000 (1+0.06)
1503.63
C = 11.4
Mode
DEG
Press
5.7 [÷]
30 [sin]
[=]
Display
5.7
.5
11.4
Press
Display
y
1 [+] 0.06 [=] [x ] 7[=] 1.503630259
[´ ] 1000 [=]
1503.630259
PHYSICS
In this right triangle,
A = 6 feet and C = 15 feet.
Determine the values of a, b and B.
If a ball is thrown upward with a velocity of 75 feet
per second, what is its velocity at the end of 1.6 sec-
2
onds (g=32.2 ft/sec )?
sin a = A / C
sin a = 6 / 15 = 0.4
Velocity: V = Vo – gt
= 75 – (32.2 ´ 1.6)
= 23.48 ft/sec.
2
–1
sin .4 = 23.58
a = 23.58 degrees
b = 90 – 23.58 = 66.42 degrees
cos a = B / C
Height:
S = Vot – 1/2 gt
2
= (75 ´ 1.6) – (1/2 x 32.2 ´ (1.6) )
= 78.784 ft.
cos 23.58 = B / 15
Press
75 [–] 32.2 [´ ] 1.6 [=]
75 [´ ] 1.6 [–] 2[1/x] [´ ]
32.2 [´ ] 1.6 [x ] [=]
Display
23.48
0.5
B = cos 23.58 ´ 15
B = .9165 ´ 15 = 13.7475 feet
2
78.784
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23
Mode Press
Display
REPLACING THE BATTERY
If the calculator slows down when using the battery, the
battery is weak and should be replaced.
1. Remove the 6 screws on the bottom panel and
remove the panel.
DEG
0 [INV][x<–>m]
0
6 [‚]
6
15 [=]
0.4
–1
[INV] [sin ]
[Min]
23.57817848
M 23.57817848
90 [–] [MR] [=] M 66.42182152
0 [INV][x<–>m]23.57817848
2. Remove the old batteries.
3. Insert the new batteries
23.58 [cos]
[¥] 15 [=]
0.916502421
13.74753633
(Radio Shack type RS-389 Cat. No. 23-101)
following the polarity of the old battery.
ELECTRONICS
AMPLIFIER GAIN
Vi = 1mV
V0 = 3V
Calculate the value of Av
Voltage gain Av = 20 log Vo/Vi
3
= 20 log
–3
1 ¥ 10
= 69.54242509 dB
4. Replace the bottom panel and replace the screws.
Press
Display
Replacement Batteries
3 [‚] [EXP] 3 [+/–]
[=] [log] [¥]
20 [=]
1. –03
3.477121255
69.54242509
Radio
Shack
389A
Eveready
189
Maxell
LR1130
24
25
CARE AND MAINTENANCE
This scientific calculator is a carefully designed
and crafted electronic device. With the proper
care, you can enjoy it for years.
• Keep the calculator dry and away from liquids.
If it gets wet, dry it immediately with a soft
cloth.If water enters the calculator, wait for the
water to evaporate before using the calculator.
• Store the calculator in moderate tempera-
tures. Excessive heat or cold can damage the
calculator.
• Do not drop or strike the calculator. A hard
knock can damage circuit boards or the dis-
play.
• Keep the unit in its protective case when not in
use. Clean the calculator case only with a soft
damp cloth. Do not use harsh chemicals,
cleaning solvents or detergents.
Attempting to modify or tamper with the calcula-
tor’s internal components can cause a malfunc-
tion and invalidate the warranty. If the calculator
is not functioning properly, return it to Datexx for
assistance.
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PRINTED IN CHINA
02/01
|