Clas Ohlson Kc-156 User Manual

Scientific calculator
• No special training is needed to fully exploit the calculator's potential but it
is recommended that you read through this manual to get acquainted with
all functions.
• Read the manual carefully and save it for future use.
• Do not expose the calculator for violent impact or extreme temperature and
do not press hard on the keys.
• Always press the [ON/C] key and make sure that the display shows "0"
before you begin calculations.

Keyboard

1. [OFF] Off switch
The calculator is switched off when the key is pressed.
2. [ON/C] On switch
Press to switch on calculator when it is turned off.
Resets the calculator in an arithmetical operation but what is saved in the
memory is not erased.
[2ndF][STAT] Activates statistics program
When you first press the [2ndF] key and then [ON/C] (STAT) the calculator's
statistics mode is activated and the display shows [STAT]. Simultaneously
all values and arithmetic commands are erased, except what is saved in the
memory.
In statistics mode the keys change functions: [)], [X→M], [MR] and [M+] to [n],
x
[ ], [S] and [DATA], respectively.
If you press these keys immediately after pressing [2ndF] they change
functions to [Σx], [Σx²], [σ] and [CD], respectively.
3. [=] Equal sign
Press to complete four arithmetic calculations (+, -, x and ÷),
complex number calculations.
[2ndF][%] Percent
Used in percent calculations and interest- / sale-calculations.
E.g. "80 with 20% sale" → [8][0][-][2][0][2ndF][%][=]
E.g. "100 with 5% interest over 3 years" → [1][0][0][+][5][2ndF][%][+][5][2ndF
][%][+][5][2ndF][%][=]
4. [DRG] Shift angular units between: Degrees/Radians/Grad
Used in trigonometric/inverted trigonometric calculations and in coordinate
transformation. Press [DRG] key to shift angular setting.
E.g. DEG → GRAD: Press [DRG] twice.
"DEG" setting: Input and answer in decimal degrees
"RAD" setting: Input and answer in radians
"GRAD" setting: Input and answer in gon (100 = 90° = π/2)
g
[2ndF] [DRG►] Changes displayed value to the next angular setting
[ DEG → RAD → GRAD → DEG]
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Art.no: 32-6972 • Model: Kc-156
5. [hyp] Hyperbolic arc
Used in calculation of hyperbolic versions of trigonometric functions.
E.g. "sinh 2" → [2][hyp][sin]
[2ndF] [arc hyp] Archyperbolic arc
Used in calculation of archyperbolic versions of trigonometric functions.
E.g. "arcsin 2" → [2][2ndF] [arc hyp][sin]
6. [sin], [cos], [tan] Trigonometric functions
E.g. "sin 30°" → [3][0][sin] (in DEG mode)
[2ndF][sin-1], [2ndF][cos-1], [2ndF][tan-1] Inverted trigonometric functions
E.g. "sin 0,5" → [0][.][5] [2ndF][sin-1] (in DEG mode)
-1
7. [F↔E] Shift display mode
Press to shift between displaying floating decimal point or scientific notation
when the answer of an arithmetic operation is displayed.
[2ndF][TAB] Number of decimals
Press to set desired number of displayed decimals. Use the [.] key for floating
decimal point.
E.g. [TAB][3] displays values with 3 decimals.
[TAB][.] displays values with floating decimal point (standard display).
8. [CE] Clears latest input
E.g. 123 [+] 455 [CE] 456 [=] → 579 (change 455 into 456)
[2ndF][n!] Factorial
Calculate factorial for the displayed number. Factorial of n [n!] = n*(n-1)*(n-
2)......2*1
E.g. "6!" → [6][2ndF][n!]
9. [→DEG] Degrees/minutes/seconds to degrees
Press to convert from values in degrees/minutes/seconds to decimal degrees.
E.g. "1°23"45'" → [1][.][2][3][4][5][→DEG]
[D] Hexadecimal "D" key (only in hexadecimal mode)
[2ndF][→ D.MS] Degrees to degrees/minutes/seconds
Press to convert from values in decimal degrees to degrees/minutes/seconds.
E.g. "1,23°" → [1][.][2][3] [2ndF][→D.MS]
10. [ln] Natural logarithm
Calculate logarithm with base e (e=2,718281828) for the displayed number.
E.g. "ln 10" → [1][0][ln]
[E] Hexadecimal "E" key (only in hexadecimal mode)
[2ndF][e ] Natural exponent function
x
Calculate natural exponent for the displayed number.
E.g. "e " → [4][2ndF][e
x √y, y x and 4
11. [log] Logarithm with base 10
Calculate logarithm with base 10 for the displayed number.
E.g. "log 10" → [1][0][log]
[F] Hexadecimal "F" key (only in hexadecimal mode)
[2ndF][10 ] Exponential function with base 10
x
Calculate exponential function with base 10 for the displayed number.
E.g. "10 " → [1][0][2ndF][10
4
12. [a] Input of real number
Used to input the real part of a complex number and for displaying the real
part of a complex result. Used for conversion of coordinates when either x in
Cartesian coordinate system (x,y) or r in polar coordinate system (r, θ) are
indata. Also displays calculated values for x or r.
]
x
]
x
[2ndF][→ rθ] Cartesian to polar
Converts complex numbers from Cartesian coordinate system (x,y) to polar
coordinate system (r, θ).
13. [b] Input of imaginary number
Used for input of imaginary part of a complex number and for displaying the
imaginary part of complex result. Used for conversion of coordinates when
either y in Cartesian coordinate system (x,y) or θ in polar coordinate system (r,
θ) are indata. Also displays calculated values for y or θ.
E.g. "2-3i" → [2][a][3][+/-][b]
[2ndF][→ xy] Polar to Cartesian
Converts complex numbers from polar coordinate system (r, θ) to Cartesian
coordinate system (x,y).
14. [→] Right shift
Removes latest input number.
E.g. [1][2][3][4][5][6] (displays 123456), [→][→] (displays 1234),
[7][8] (displays 123478)
[2ndF][CPLX] Complex number mode
When you press the keys the calculator's complex number mode is activated
and [CPLX] is shown on the display. Simultaneously all values and arithmetic
commands are erased, except what is saved in the memory. Use keys [a] and
[b] to enter values and display them.
15. [EXP] Scientific notation
Press to enter values directly in scientific notation.
[A] Hexadecimal "A" key (only in hexadecimal mode)
[2ndF][π] Pi
Input constant value π (π = 3,141592654).
16. [y ] Exponential function with arbitrary base
x
Enter base first, press [y ] and enter exponent.
x
E.g. "3 " → [3][y ][4][=]
4 x
[B] Hexadecimal "B" key (only in hexadecimal mode)
[2ndF][ √y] Arbitrary root
x
Calculate xth root of number y.
E.g. " √16" → [1][6] [2ndF][ √y][4][=]
4 x
17. [√] Square root
E.g. "√16" → [1][6] [√]
[C] Hexadecimal "C" key (only in hexadecimal mode)
[2ndF][ √] Cubic root
3
E.g. " √8" → [8][2ndF][ √]
3 3
18. [x 2 ] Squared value
E.g. "3 " → [3][x ]
2 2
[2ndF][ 1 / x ] Reciprocal value
E.g. " 1 / 23 " → [2][3][ 1 / x ]
19. [(] Open parenthesis
Press to begin a calculation within parenthesis. See also "Close parenthesis".
You may use parentheses to enforce desired order within a calculation. N.B.
You may use no more than 4 nested parentheses in a calculation.
E.g. "1+2(3+4)" → [1][+][2][*][(][3][+][4][)][=]
[2ndF][ ] Change values
Press to change the displayed number to the number saved in current register.
(x ↔ y) Current register contains result from previous calculation.
E.g. "1+2*3" → [1][+][2][*][3][=] (displays "7", saves "6" in current register)