Citizen SR-270X Bedienungsanleitung

File name: HDB0R100721_Cover_ok.doc version : 2010/07/12

SIZE:140x74mm

PARTS NO. HDB0R100721 (SR100)

Scientific Calculator

SR-270X

Instruction Manual

Manual de Instrucciones

Livro de Especificacoes

nweisungshandbuch

Manuel d’instructions

Istruzioni all’Uso

Gebruiksaanwijzing

E – 1

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General Guide .................................................3

Turning on or off.............................................3

Battery replacement .......................................3

Auto power-off function .................................3

Reset operation ..............................................3

Contrast adjustment.......................................3

Display readout ..............................................4

Before Starting Calculation ............................4

Using " MODE " keys......................................4

Using " SET UP " keys....................................5

Using Math Mode............................................5

Using " 2nd " " ALPHA " Keys........................6

Making corrections during Input....................6

Error Position Display Function.....................6

Replay function ..............................................6

Memory calculation ........................................7

Order of operations ........................................7

Accuracy and Capacity...................................8

Error conditions .............................................9

Basic Calculations........................................10

Arithmetic calculation ..................................10

Parentheses calculations.............................10

Percentage calculation................................. 11

Display notations.......................................... 11

Answer Function .......................................... 11

Scientific Function Calculations .................. 11

Logarithmic and Exponential functions.......12

Fraction calculation......................................12

Angle unit conversions ................................12

Sexagesimal ↔Decimal transformation......13

Trigonometric / Inverse-Tri. functions..........13

Hyperbolic / Inverse-Hyp. functions.............13

Coordinates transformation .........................13

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Probability ....................................................13

Other functions ( √, 3, X, x-1,x2,

x3, xy, Abs, RND ) .........................................14

Multi-statement Function .............................14

Statistical Calculations .................................14

To Enter data for statistical analysis............15

To analyze data you have entered................15

To view or change data ................................17

Function Table...............................................17

E – 3

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General Guide

Turning on or off

To turn the calculator on, press [ ON ]; To turn the calculator off,

press [ 2nd ] [ OFF ].

Battery replacement

SR-270X is a dual power system which is powered by one

button-type battery (G13 or L1154) and a solar cell. If the display

becomes dim and difficult to read, the batteries should be replaced

as soon as possible.

To replace batteries:

1) Remove the screw and the battery compartment cover.

2) Remove the old battery and insert a new one with polarity in

correct directions, then replace the cover.

3) After changing battery, please use a pointed object to press the

reset hole in the rating label area located at the rear of this unit.

Auto power-off function

This calculator automatically turns off when not operated for

approximately 3~9 minutes. It can be reactivated by pressing [ ON ]

key and the memory, settings are retained.

Reset operation

If the calculator is on but you get unexpected results, press [ 2nd ]

[ CLR ] in sequence. A message appears on the display to confirm

whether you want to reset the calculator and clear memory contents

after selecting [ 3 ].

[ 3 ]

Reset All?

[ = ] : Yes

[AC] : Cancel

Clear?

1: Setup 2:Memory

3: All

To clear all variables, pending operations, statistical data, answers,

all previous entries, and memory, please press [ = ]; To cancel the

reset operation without clearing the calculator, please press [ AC ].

If the calculator is lock and further key operations becomes

impossible, please use a pointed object to press the reset hole at the

same time to release the condition. It will return all settings to default

settings.

Contrast adjustment

Pressing the [ W] or [ X] following [ 2nd ] [ SET UP ] [ T] [ 5 ]

(WCONTX) keys in sequence can make the contrast of the screen

lighter or darker. Holding either key down will make the display

become respectively lighter or darker. After finishing your setting,

press [ AC ] to exit.

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Display readout

The display comprises the entry line, the result line, and indicators.

12369x7532x1032

9.3163308x1039

Entry line

Indicator

Result line

Math c

Entry line SR-270X displays an entry of up to 99 digits. Entries

begin on the left; those with more than 15 digits scroll

to the left. Press [ X] and [ W] to move the cursor

through an entry. However, whenever you input the

89th digit of any calculation, the cursor changes from

"" to " " to let you know memory is running low. If

you still need to input more, you should divide your

calculation into two or more parts.

Result line It displays a result of up to 10 digits, as well as a

decimal, a negative sign, a " x10 " indicator, and a

2-digit positive or negative exponent.

Indicators The following indicators may appear on the display to

indicate the current status of the calculator.

Indicator Meaning

2nd 2nd set of function keys are active

AAlphabetic keys are active

M There is a number in the memory

STO Storing variable mode is active

RCL Recalling variable mode is active

STAT Statistics mode is active

Math Math style is selected as the Input/output format

DRGAngle mode: Degrees, Radians, or Gradians

FIX A fixed number of decimal places is in effect

SCI A fixed number of Scientific notation is in effect

TS There are earlier or later results that can be displayed

Disp Displayed value is intermediate result when performing

multi-statement function

Before Starting Calculation

Using " MODE " keys

Press [ MODE ] to display mode menus when specifying an

operating mode ( " 1: COMP ", " 2: STAT ", " 3: TABLE " ).

COMP : Use this mode for basic calculations, including

scientific calculations. (the default)

STAT : Use this mode to perform single–variable and

paired–variable statistical calculations and regression

calculations.

TABLE : Use this mode to display a defined function in a tabular

form.

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Give " 2: STAT " as an example:

Method : Press [ MODE ] and then key in directly the number of

the mode, [ 2 ] , to enter the desired mode

immediately.

Using " SET UP " keys

[ 2nd ] [ SET UP ] display the setup menu that enables you to specify

the input /output format, the angle mode, the numeric notation, the

statistical setting or the contrast adjustment. The setup menu consist

of two screens which you can jump between by using [ T] and [ S].

1: ab/c 2: d/c

3: STAT 4: Disp

5: _CONT `

1: MthIO 2: LineIO

3: Deg 4: Rad

5: Gra 6: Fix

7: Sci 8: Norm

MthIO : Math mode displays inputs and outputs in textbook

format. (the default)

LineIO : Linear mode displays inputs and outputs in a single

line.

Deg : Deg mode sets the angle unit to degrees (the default)

Rad : Rad mode sets the angle unit to radians

Gra : Gra mode sets the angle unit to gradians.

Fix : Fix decimal setting (0 through 9)

Sci : Scientific notation (0 through 9)

Norm : Norm specifies the range (Norm1, Norm2) in which

the results are to be displayed in exponential format

or in non-exponential format (Norm1 is the default)

ab/c : ab/c displays the fraction in mixed number format

d/c : d/c displays the fraction in improper format (the

default)

STAT : STAT sets the Statistical Data Editor Screen to show

or hide the FREQ column

Disp : Disp sets the decimal point to Dot ( . ) or Comma ( , )

(Dot is the default)

WCONTX: Contrast Adjustment

Using Math Mode

Press [ 2nd ] [ SET UP ] [ 1 ] to enter Math mode. While in math

mode, the values for functions such as e

d, A c

b, log a b, Abs, 10x,

e X, √, 3,X2,X3,X1−,Xy,x....can be entered and displayed

in a mathematically written way. By default, SR-270X is in Math

mode. See Example 1~2.

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Using " 2nd " " ALPHA " Keys

When you press [ 2nd ], the " 2nd " indicator shown on the display

indicates that you will be selecting the second function of the next

key you press. If you press [ 2nd ] by mistake, simply press [ 2nd ]

again to remove the " 2nd " indicator.

When you press [ ALPHA ], the "A" indicator shown on the display

indicates that you will be selecting the alphabetic function of the next

key you press. If you press [ ALPHA ] by mistake, simply press

[ ALPHA ] again to remove the " A" indicator.

Making corrections during Input

The vertical blinking cursor " " means the calculator is in insert

mode. The horizontal blinking cursor " " means the calculator is in

overwrite mode.

By default, the calculator is in insert mode. In linear format, you can

press [ 2nd ] [ INS ] to switch between the two modes, whereas in

Math format, you can use only the insert mode.

In insert mode, the character in front of the cursor " " will be deleted

or inserted after you press [ DEL ] or enter a new character

In overwrite mode, the character at the cursor " " will be deleted by

[ DEL ] key or replaced by any new character you enter.

To clear all characters, simply press [ AC ] in either mode.

Error Position Display Function

When a mathematically illegal calculation performed causes an error

and an error message ( See < Error conditions > ) appears, press

[ W] [ X] and then the error position display function will tell you with

the cursor where the error is. In that case, please make necessary

corrections before executing the calculation again. See Example 3.

Replay function

This function stores operations that just have been executed in

COMP mode. After execution is completed, pressing [ T] or [ S]

key will display the operation executed.

You can continue moving the cursor by [ W] or [ X] to display

previous input steps and editing values or commands for

subsequent execution.

The operation records in Memory are cleared each time when you

turn off the calculator, press [ ON ] key, perform a “reset”, change

display format or calculation mode.

When the memory is full, the oldest calculation records are deleted

automatically to make room for the new ones. See Example 4.

E – 7

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Memory calculation

Memory variable

The calculator has seven memory variables for repeated use -- A, B,

C, D, M, X, Y. You can store a real number in any of the seven

memory variables. See Example 5.

• [ 2nd ] [ STO ] + [ A ] ~ [ D ], [ M ], [ X ] ~ [ Y ] lets you store values

to variables.

• [ RCL ] + [ A ] ~ [ D ], [ M ], [ X ] ~ [ Y ] recalls the value of the

variable.

• [ 0 ] [ 2nd ] [ STO ] + [ A ] ~ [ D ], [ M ], [ X ] ~ [ Y ] clears the

content to a specified memory variable.

• [ ALPHA ] + " memory variable " lets you insert the applicable

variables in a calculation.

• [ 2nd ] [ CLR ] [ 2 ] [ = ] clears all variables.

Running memory

You should keep the following rules in mind when using running

memory. See Example 6.

• Press [ M+ ] to add a result to running memory and the " M "

indicator appears when a number is stored in the memory. Press

[ RCL ] [ M ] to recall the content of running memory.

• Recalling from running memory by pressing [ RCL ] [ M ] key does

not affect its contents .

• Running memory is not available when you are in statistics mode.

• The memory variable M and running memory utilize the same

memory area.

• In order to replace the content of the memory with the displayed

number, please press [ 2nd ] [ STO ] [ M ] key.

• To clear the content of running memory, you can press [ 0 ] [ 2nd ]

[ STO ] [ M ] in sequence.

(Note) : Besides pressing [ 2nd ] [ STO ] [ M ] key to store a value,

you can also assign values to memory variable M by

[ M+ ]. However, when [ 2nd ] [ STO ] [ M ] is used,

previous memory contents stored in variable M are

cleared and replaced with the newly assigned value.

When [ M+ ] is used, values is added to present sum in

memory.

Order of operations

Each calculation is performed from left to right and in the following

order of precedence:

1) Expression inside parentheses.

2) Functions with parentheses:

PR, R P

sin, cos, tan, sin –1, cos –1, tan –1, sinh, cosh, tanh, sinh –1,

cosh –1, tanh –1,

log, ln,

√, 3, 10 X, e X, Abs, RND

E – 8

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3) Functions preceded by values, powers, power roots, for

example, x 2, x 3, x–1, x!, DMS, ° , r , g , x y, X, %

4) Fractions

5) Negations ( – )

6) Statistical estimated value calculation: x

ˆ,y

ˆ,1x

ˆ,2x

7) nPr, nCr

8) x ,

Multiplication sign omitted immediately before π, e, variable, and

function with parentheses: for example, 3π, 5B, Asin(30)

9) +, –

Accuracy and Capacity

Output digits : Up to 10 digits.

Calculating digits : Up to 16 digits

In general, every reasonable calculation is displayed up to 10 digits

mantissa, or 10-digit mantissa plus 2-digit exponent up to 10 ± 99.

Numbers used as input must be within the range of the given

function as follows:

Functions Input range

sin x

cos x

Deg : 0 ≦x <9 x 10 9

Rad : 0 ≦x <157079632.7

Grad : 0 ≦x <1 x 10 10

tan x Same as sin x, except when

Deg : x = 90 (2n-1)

Rad : x = 2

π(2n-1)

Grad : x = 100 (2n-1)

sin –1 x,

cos –1 x 0 ≦x ≦1

tan –1 x 0 ≦x <1 x 10 100

sinh x, cosh x 0 ≦x ≦230.2585092

tanh x 0 ≦x <1 x 10 100

sinh –1 x 0 ≦x <5 x 10 99

cosh –1 x 1 ≦x <5 x 10 99

tanh –1 x 0 ≦x <1

log x, ln x 0 <x <1 x 10 100

10 x–1 x 10 100 ＜x ＜100

e x–1 x 10 100 ＜x ≦230.2585092

x0 ≦x <1 x 10 100

x 2x <1 x 10 50

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x 3x ≦2.15443469003 x 10 33

x -1 x ＜1 x 10 100, x≠0

3xx <1 x 10 100

X ! 0 ≦x ≦69 ( x is an integer)

nPr 0≦r≦n, 0≦n<1 x 10 10 (n,r are integers)

1≦{n!/(n-r)!}<1 x 10 100

nCr 0≦r≦n, 0≦n<1 x 10 10 (n,r are integers)

1≦n!/r!<1 x 10 100 or 1≦{n!/(n-r)!}<1 x 10 100

RP x , y ＜1 x 10 100

22 y+x ＜1 x 10 100

PR 0 ≦r ＜1 x 10 100

θ: same as sin x

DMS │D│, M, S ＜1 x 10 100, 0 ≦M, S

eDMS x <1 x 10 100

Decimal QSexagesimal Conversions

0 0 ׀0 ׀׀≦x ≦9999999

59 ׀59 ׀׀

x yx >0 : –1 x 10 100 <y log x <100

x = 0 : y >0

x <0 : y = n, m/(2n+1) (m, n are integers)

but –1 x 10 100 <y log ⏐x⏐<100

xyy >0 : x ≠0, –1 x 10 100 <x

1 log y <100

y = 0 : x >0

y <0 : x = 2n+1, (2n+1)/m (m≠0, m, n are

integers)

but –1 x 10 100 <x

1 log ⏐y⏐<100

Ab/c Total of integer, numerator and denominator

must be within 10 digits (includes division

marks)

STAT 1–VAR :

a. n ≦80 lines (when FREQ column is OFF)

b. n ≦40 lines (when FREQ column is ON)

2–VAR :

a. n ≦40 lines (when FREQ column is OFF)

b. n ≦26 lines (when FREQ column is ON)

Error conditions

Error message will appear on the display and further calculation

becomes impossible when any of the following conditions occur.

Indicator Meanings

Math ERROR (1) You attempted to divide by 0

(2) When allowable input range of function

calculations exceeds the range specified

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