Citizen SR-260 User Manual
Contents
General guide .................................................. E - 2
Power supply ......................................................................... E - 2
The keyboard ......................................................................... E - 2
Display symbols .................................................................... E - 3
Display formats ..................................................................... E - 3
Order of operations................................................................ E - 4
Correction .............................................................................. E - 5
Accuracy and Capacity.......................................................... E - 5
Overflow / Error conditions.................................................... E - 7
Basic calculation ............................................. E - 8
Mixed arithmetic calculation ................................................. E - 8
Parentheses calculations ...................................................... E - 8
Constant calculation .............................................................. E - 8
Percentage calculation .......................................................... E - 9
Memory calculation ............................................................... E - 9
Scientific calculation ..................................... E - 10
Reciprocal, Factorial ........................................................... E - 10
Square, Square / Cubic Root, Power, Root ........................ E - 10
Logarithms and Antilogarithms ........................................... E - 10
Fraction calculation ............................................................. E - 10
Angular units conversion..................................................... E - 11
Trigonometric / Inverse trigonometric functions ................. E - 11
Hyperbolic / Inverse hyperbolic functions ........................... E - 12
Rectangular / Polar coordinates.......................................... E - 12
Permutations, Combinations ..............................................E - 12
Sexagesimal ↔ Decimal form conversion ......................... E - 13
Base-n mode calculation ....................................................E - 13
Complex numbers calculation ............................................E - 14
Random numbers and Exchange key................................. E - 14
Unit conversion.................................................................... E - 15
Statistics calculation ..................................... E - 15
Computing single variable statistics ................................... E - 15
Viewing statistics data ........................................................ E - 16
Adding a data entry ............................................................. E - 17
Editing statistics data .......................................................... E - 17
Delete error .......................................................................... E - 18
Weighted data entry method............................................... E - 18
E-1
General guide
Power supply
On or Off :
T o turn the calculator on, press [ON/C]; to turn the calculator off, press
[2ndF] [OFF].
Auto power-off function :
This calculator automatically turns off it when not operated for
a pproximately 9 minutes. Power ca n be restored by pressing the [ON/C]
key again. Memory contents and the previous mode setting (ST A T, DEG,
CPLX, Base-n,…) are retained even when power is turned off or auto
power-off.
Battery replacement :
The calculator uses two alkaline button batteries GP76A(LR44) for
power. If the display becomes dim and difficult to read, the batteries should
be replaced as soon as possible.
T o re place batteries :
1) Remove the screws that hold the back cover.
2) Remove the back cover.
3) Replace the old batteries and install new ones with polarity in correct
directions.
4) Secure the screws in place, then press [ON/C] to turn the power on.
The keyboard
Many of the calculator’s keys are used to perform more than one function.
The functions marked on the keyboard are printed differently to help you find
the one you need quickly and easily.
–1
2nd functions
1st functions
1st functions
Those are the functions that are normally executed when you press the key.
2nd functions
The second function is printed above or to the right of the key . T o execute
2nd functions key, please press [ 2ndF ] then the corresponding key. When
you press [ 2ndF ], the “ 2ndF ” indicator shown in the display is to tell you
that you will be selecting the second function of the next key you press. If you
press [ 2ndF ] by mistake, simply press [ 2ndF ] again to remove the “ 2ndF
” indicator.
sin
sin
E-2
(Note) : [ A ], [ B ], [ C ], [ D ], [ E ], [ F ] are 1st functions in HEX mode.
Display symbols
Indicators shown on the display is to indicate you the current status
of the calculator.
DEG or RAD or GRAD : angular unit
M : Independent memory CPLX :Complex number mode
E : Overflow / Error ST A T : Statistical mode
– : minus 2ndF : [2ndF] key pressed
( ) : Parenthesis calculation CP : Precision capability
BIN : Binary mode CPK : Process capability
OCT : Octal mode : Deviation
HEX : Hexadecimal mode USL : Setting upper limit
ED : Edit mode LSL : Setting lower limit
HYP : Hyperbolic mode
Display formats
The calculator can display numbers in four formats : floating point, fixed
point, scientific, and engineering.
Floating point display format
The floating point format displays numbers in decimal form, using up
to 10 digits. Any trailing zeros are truncated.
If the result of a calculation is too large to be represented in 10 digits,
the display automatically switches to scientific format. If the result of later
calculations is small enough to be displayed in 10 digits, the calculator
returns to floating point format.
(Ex.) : Set the display in floating display format.
Step : Press [ 2ndF ] [ TAB ] [ • ]
Fixed point display format
The fixed point, scientific, and engineering formats use a fixed number
of decimal places to display numbers. If more than the selected number of
decimal places is keyed, it will be rounded to the correct number of decimal
places.
DEG
0.
(Ex.) : Fix the display at 2 decimal places, then key in 3.256
Step 1 : press [ 2ndF ] [ TAB ] 2
Step 2 : key in 3.256 [ = ]
DEG
DEG
E-3
0.00
3.26
On the contrary, if fewer than the selected number of decimal places
is keyed, it will be padded with trailing zero.
(Ex.) : Fix the display at 4 decimal places, then key in 4.23
Step 1 : press [ 2ndF ] [ TAB ] 4
Step 2 : key in 4.23 [ = ]
DEG
DEG
0.0000
4.2300
Scientific display format
In Scientific display format, the number 891500 can be shown in scientific
format as 8.915 x 10 05, where 8.915 is called the mantissa and 5 is as the
exponent of 10.
(Ex.) : 7132 x 125 is displayed in scientific display format.
Step 1 : key in 7132 [ x ] 125 [ = ]
Step 2 : press [ F↔E ]
DEG
DEG
891500.
8.915
05
(in floating point format)
Besides, entry can be made in scientific notation by using the [EXP]
key after entering the mantissa.
(Ex.) : Key the number 4.82296 x 10
Step : key in 4.82296 [ EXP ] 5
5
DEG
4.82296
05
(in floating point format)
Engineering display format
The format is similar to the scientific format, expect the mantissa can
have up to three digits left of the decimal, instead of only one, and the
exponent is always a multiple of three. It is useful for engineers to convert
units based on multiples of 10 3.
(Ex.) : Convert 15V into 15000mV (V : Volt)
Step 1 : key in 15
Step 2 : press [ ENG ] twice
DEG
DEG
15.
15000.
– 03
(Ex.) : Convert 15V into 0. 015KV (V : Volt)
Step 1 : key in 15
Step 2 : press [ 2ndF ] [ ] twice
DEG
DEG
15.
0.015
03
Order of operations
Each calculation is performed in the following order of precedence :
1) Operation in parenthesis
2) Functions required pressing the function key before entering, for
exa mple, [ DA T A ] in ST A T mode a nd [ EXP ] key .
3) Functions required inputing values before pressing the function key,
for example, cos, sin, tan, cos–1, sin–1, tan–1, log, ln, X 2, 1/x, , ,
, X!, %, RND, ENG,
4) Fractions
, ,,,, ,,
, and 6 units conversion.
E-4
5) +/–
6) X y,
y
X
7) nPr, nCr
8) x , ÷
9) +, –
Correction
If you have made a mistake when entering a number (but you have not yet
pressed an arithmetic operator key), just press [ CE ] to clear the last entry
then input it again, or delete individual digits by using the backspace key
[ 00
by pressing [ON/C] to clear the calculation completely (expect clearing
memory, see page 9).
0 ]
(Ex.) : Correct 12385 as 789
Step : press [ CE ] 789
DEG
789.
(Ex.) : Correct 12385 as 123
Step : press [ 00
0 ] twice
DEG
123.
In a series of calculations, you can correct errors in immediate results
If you press the wrong arithmetic operation key, just press [ CE ] key
before entering anything else.
Accuracy and Capacity
Accuracy : 1 in 10th digit.
Capacity :
In general, every reasonable calculation is displayed up to 10 digit
mantissa, or 10-digit mantissa plus 2-digit exponent up to 10 99or integers
between – 9999999999 and 9999999999.
Numbers used as input must be within the range of the given
function. The range for each of the calculator’s functions is given in the
following pages.
Functions Input range
sin x, cos x, tan x Deg X 4.5 x 1010deg
Rad X 2.5 x 10 8rad
Grad X 5 x 10 10grad
however, for tan x
Deg X 90 (2n+1)
Rad X (2n+1)
π
2
Grad X 100 (2n+1)
(n is an integer)
E-5
sin –1 x, cos –1 x X ≤ 1
tan–1 x X 1 x 10
100
sinh x, cosh x X ≤ 230.2585092
tanh x X 1 x 10
sinh–1 x X 5 x 10
cosh–1 x1 ≤ X 5 x 10
100
99
99
tanh–1 x x 1
log x, ln x 1 x 10
x
10
e
x
x
X
2
–1 x 10
–1 x 10
0 ≤ X 1 x 10
–99
≤ X 1 x 10
100
X 100
100
X≤ 230.2585092
X 1 x 10
1 / X X 1 x 10
3
X
X 1 x 10
100
50
100
100
100
, X 0
X ! 0 ≤ X ≤ 69 , X is an integer.
R P 1 x 10
X2 +Y
P R0≤ r 1 x 10
2
100
Deg 4.5 x 10 10deg
Rad 2.5 x 10 8rad
Grad 5 x 10 10grad
however, for tan x
Deg 90 (2n+1)
Rad (2n+1)
2
Grad 100 (2n+1)
(n is an integer)
, ,,
DD , MM, SS.SS 1 x 10
0 ≤ MM, SS.SS
, ,,
y
X
x 1 x 10
X 0 –1 x 10
100
100
X = 0 y 0
X 0 y = n , 1/(2n+1), n is an integer .
but -1 x 10
100
1
log X 100
100
y log X 100
y
100
,
y
X
X 0 y 0, –1 x 10
100
1
log X 100
y
X = 0 y 0
X 0 y = 2n+1, I/n, n is an integer.(n 0)
but – 1 x 10
100
1
log X 100
y
E-6
Loading...