Citizen SRP-145T Bedienungsanleitung

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BASIC DEFINITIONS .............................................. 2

The Keys ................................................................................. 2

General Keys........................................................................... 2

Memory Keys........................................................................... 2

Special Keys............................................................................ 3

Function Keys.......................................................................... 4

Programming Keys (Use in the PGM mode only).................... 5

Statistical Keys (Use in the SD mode only) ............................. 6

The Display.............................................................................. 6

OVERFLOW OR ERROR CHECK .......................... 7

REPLACING THE BATTERIES............................................... 7

BASIC OPERATION ............................................... 8

TURNING ON THE CALCULATOR ........................................ 8

Normal Calculations ................................................................ 8

Four Basic Calculations (Including Parenthesis Calculations) 8

Constant Calculations.............................................................. 9

Memory Calculations ............................................................. 11

Function Calculations ......................................... 12

Sexagesimal ↔Decimal Conversion .................................... 12

Trigonometric/Inverse Trigonometric Functions .................... 12

Hyperbolic Functions and Inverse Hyperbolic Functions ...... 13

Common and Natural Logarithms/Exponentiations............... 14

Square Roots, Cube Roots, Squares, Reciprocals, and

Factorials ............................................................................... 16

STANDARD DEVIATIONS.................................... 18

PROGRAMMING................................................... 19

Storing Mathematical Procedures ......................................... 19

SRP-145T

Scientific Calculator

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BASIC DEFINITIONS

The Keys

To keep your calculator as compact as possible, some keys have

more than one function. You can change the function of a key by

pressing another key first, or by setting the calculator in a certain

mode.

The following pages give you more detailed explanation of each key's

use and function.

2ndF

[SHIFT] Second Function Select Key

Some keys have a second function inscribed above them (for example,

1/x is above x2). To perform this second function, press [SHIFT]. "2F"

appears in the display. Then press the key.

Example: To calculate the reciprocal of 5, press [5] [SHIFT] [1/x]. The

display shows 0.2. In this manual, we refer to the key by the desired

function. So, the example would be shown as [5] [SHIFT] [1/x].

General Keys

[0] - [9] [ • ] Data Entry Keys

Press these keys in their logical sequence to enter numbers.

[+], [−], [x], [ ÷], [=] Basic Calculation Keys

Press these keys in their logical sequence for addition, subtraction,

multiplication, division, and to display answers.

[ON/C] Power ON/Clear Key

Press [ON/C] to turn on the calculator and to clear everything except

the contents of the memory, constant memory (Ka, Kb), and program

memory. It also overrides the auto power-off function.

[CE] Clear Entry Key

Press [CE] to erase incorrect entries.

[+/−] Sign Change Key

Press [+/−] to change the displayed number from positive to negative

or from negative to positive. If you press [+/−] after pressing [EXP], the

sign of the exponent changes.

Memory Keys

[MR] Memory Recall Key

Press [MR] to display the contents of the memory.

[XÆM] Memory Store Key

Press [XÆM] to store the displayed value into memory. Any previous

value in memory is automatically erased.

[M+] Memory Plus Key

Press [M+] to total the current calculation and add the result to the

value already in memory.

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[SHIFT] [KaxÆk], [SHIFT] [KbxÆk] Constant (Ka, Kb) Memory Store

Key

Press to enter the displayed value into constant memory Ka or Kb.

[KaxÆk], [KbxÆk] Constant (Ka, Kb) Memory Recall Key

Press to display the contents of a constant memory.

Notes:

• Constant memories Ka and Kb can have a value of 0.

• If you press [KaxÆk]or [KbxÆk]after entering a number or making a

calculation, the displayed value is multiplied by the value in Ka or

Kb.

Special Keys

[ ( ], [ ) ] Parenthesis Keys

This calculator uses true algebraic logic. It performs calculations using

the following priority:

1) Functions

2) Calculations in parenthesis

3) Power and root calculations

4) Multiplication and division

5) Addition and subtraction

To change this order, enclose the expressions that must be calculated

first within [ ( ] and [ ) ]. In a single expression, you can use a

maximum of 42 nested parentheses at 6 levels (nesting of up to 7

parentheses in one level).

For example, if you press [−]6[x2] [=], the calculator gives a result of

−36. This might seem incorrect at first, since the square of a negative

number is always positive. However, if you refer to the above priority

sequence, you see that the power ([x2]) has a higher priority than the

minus ([−]). So the calculator sees the entry as “the negative of six

squared.” To make the calculator perform “negative six, squared”

enter [ (] [−]6[ )] [x2] [=]. This forces the calculator to resolve the [−]

6and then square the result.

[EXP] Exponent Key

To enter a number in scientific notation, first enter the numbers for the

mantissa, press [EXP], and then enter the numbers for the exponent.

[SHIFT] [ π ] Key

Press [SHIFT] [ π ] to display the value of π, which is the ratio of a

circle’s circumference to its diameter (approximately 3.141592654).

[SHIFT] [Æo’ ”], [SHIFT] [o’ ”Æ] Sexagesimal notation/decimal

notation conversion Keys

To change from sexagesimal (base 60) notation (degree, minute,

second) to decimal notation (degree) press [SHIFT] [o’ ”Æ]. To change

from decimal notation to sexagesimal notation, enter the number in

decimal form and then press [SHIFT] [Æo’ ”].

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[SHIFT] [X↔Y] Register Exchange Key

Press [SHIFT] [X↔Y] to exchange the displayed value (X−register)

with the contents of the working register (Y−register).

[SHIFT] [FIX] Decimal Point Set Key

Use to set the number of digits displayed after the decimal point in

either final or intermediate results. The calculator continues to use its

full range for internal calculations, and only rounds the number in the

display.

[SHIFT] [FIX] [0] - [6]

Sets the number of digits to be displayed to the right of decimal point.

[SHIFT] [FIX] [7], [8], [9], [ • ]

Selects floating point format.

Note: [SHIFT] [FIX] is inactive immediately after and during numerical

input.

[DRG] Pressing this key will change the mode of angle unit

sequentially

ÆÆÆ

DEG RAD GRAD

and display it on LCD.

[OFF] Power off key

Function Keys

[sin], [cos], [tan] Sine, Cosine, Tangent Keys

Calculate the trigonometric functions of the displayed value.

[SHIFT] [sin−1], [SHIFT] [cos−1], [SHIFT] [tan−1]

Arc Sine, Arc Cosine, Arc Tangent Keys

Calculate the inverse trigonometric functions of the displayed value.

[SHIFT] [HYP] [sin], [SHIFT] [HYP] [cos], [SHIFT] [HYP] [tan]

Hyperbolic Keys

Calculate the hyperbolic functions of the displayed value.

[SHIFT] [HYP] [SHIFT] [sin−1], [SHIFT] [HYP] [SHIFT] [cos−1],

[SHIFT] [HYP] [SHIFT] [tan−1]

Inverse Hyperbolic Keys

Calculate inverse hyperbolic functions of the displayed value.

[Log], [SHIFT] [10X] Common Logarithm and Common

Antilogarithm Keys

Calculate the common logarithm of the displayed value. To calculate

the common antilogarithm of the displayed value, press [SHIFT] [10X].

[In], [SHIFT] [eX] Natural Logarithm and Natural Antilogarithm

Keys

To calculate the natural logarithm of the displayed value, press [In]. To

calculate the natural antilogarithm of the displayed value (to raise e

(2.718281828) to x powers), press [SHIFT] [eX].

[], [x2] Square Root and Square Keys

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Press [ ] to find the square root of the displayed value. To square

the displayed value, press [x2].

[SCI] Scientific Key

Converts the displayed number into a power of ten and back.

Example: You Press You See

12.3456 x 10 = 123.456

SCI 1.23456 02

SCI 123.456

SCI 1.23456 02

[SHIFT] [ 3] Cubic Root Key

Press [SHIFT] [ 3] to find the cubic root of the displayed value.

[SHIFT] [1/x] Reciprocal Key

Press [SHIFT] [1/x] to calculate the reciprocal of the displayed value.

[SHIFT] [x!] Factorial Key

To find the factorial of the displayed value, press [SHIFT] [x!].

Example: 4! = 4 x 3 x 2 x 1 = 24

[Xy] Power Key

Press any number [X], [Xy], any number [y], and [=] to raise X to the y

power.

Example: 5 [Xy] 4 [=] 625

[SHIFT] [ yx] Root Key

Press any number [x] [SHIFT] [ yx], any number [y], and [=] to

display the y root x.

Example: 625 [SHIFT] [ yx] 4 [=] 5

Programming Keys (Use in the PGM mode only)

[SHIFT] [PGM] −Program Mode Set and Clear Key.

Set the calculator to the learn program mode. PGM appears on the

display and the previous contents of program memory is cleared.

When you finish entering the program, press [SHIFT] [PGM]. The

program you just entered is stored in the program memory. PGM

disappears and the calculator exits the program mode.

[RUN] −Compute Key

Runs the recorded program.

[SHIFT] [[x]] −Specify Variable Key

Lets you have the calculator wait for an entry during a program.

[SHIFT] [HALT] −Temporarily Halt Calculation Key

Temporarily halts a program so you can view the intermediate results

or interrupt calculations.

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Statistical Keys (Use in the SD mode only)

[SHIFT] [SD] Statistical Mode Select Key

Sets the calculator to the statistical calculation mode. SD appears on

the display.

[SHIFT] [CAD] Statistical Register Clear Key

Clears the statistical calculation registers.

[DATA], [DEL] Data Entry and Delete Key

In the SD mode, enter data by pressing the desired numbers, then

[DATA]. If you enter incorrect data and do not notice your mistake

until you press [DATA], enter the same incorrect data and then press

[DEL] to delete that incorrect data.

[

] Arithmetic Mean Key

Calculates the arithmetic mean (

) of the data.

[SHIFT] [σn] Population Standard Deviation Key

Calculates the population standard deviation (σn) of the data.

[σn–1] Sample Standard Deviation Key

Calculates the sample standard deviation (σn–1) of the data.

[SHIFT] [Σx2] Sum of Square Value Key

Calculates the sum of the square value (Σx2) of the data.

[SHIFT] [Σx] Sum of Values Key

Calculates the sum of the value (Σx) of the data.

[n] Number of Data Key

Displays the number of data (n) entries.

The Display

The display shows entered numbers, interim results, and calculation

results.

Floating point displays up to 10 digits.

The mantissa section displays up to 8 digits. The exponent section

displays up to ±99.

SD : Indicates the statistical mode.

M: Indicates that a value is stored in memory.

-: Appears to the left of the mantissa or exponent to indicate

that the respective value is negative.

E: Indicates an error.

PGM : Indicates the program learn mode.

GRAD : Indicates that gradient units have been selected.

RAD : Indicates that radian units have been selected.

DEG : Indicates that degree units have been selected.

2F : Appears when the second function has been selected.

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HYP : Appears when the hyperbolic function has been selected.

(: Appears when you press [ (]. It shows the present level of

nesting.

( | ) : Appears when you press [SHIFT] [[x]] in the program learn

mode and when program execution halts to let you enter a

variable. The number in brackets shows the number of the

place of the variable, and goes from 1 - 40.

OVERFLOW OR ERROR CHECK

An overflow or error is indicated by "E". Stop further calculations.

An overflow or error occurs when:

a) An intermediate or final calculation result exceeds 1 x 10100

(including memory calculations).

b) You try to divide by zero.

c) The number of low priority storage levels exceeds 6 in a

parentheses calculation or nesting parentheses exceed 7 in one

level. (Even if the number of levels is within 6, an error might

occur if you are using memories Ka or Kb, or program memories.)

d) You try to use [SHIFT] [KaXÆK] or [SHIFT] [KbXÆK] while memories

Ka and Kb are being used for low-priority calculation storage.

e) You make a calculation that is out of the range for functional and

statistical calculations.

f) You try to store over 40 steps in a program.

To clear calculations after an overflow condition, press [ON/C].

Memory Protection:

Memory contents are protected against overflow or error conditions. If

a memory operation would result in the memory value exceeding

1 x 10100, the calculator displays Eand does not change the value in

memory.

REPLACING THE BATTERIES

Your calculator is powered by two alkaline-manganese batteries.

When the display dims, replace the batteries.

1. Unscrew the two screws on the back of the calculator.

2. Insert a flat bladed screwdriver into the slot between the upper and

lower case then carefully twist it to separate the case.

3. Remove both batteries and dispose of them promptly. Never allow

children to play with batteries.

4. Wipe off the new batteries with a dry cloth to maintain good contact.

5. Insert the two new batteries with their flat sides (plus terminals) up.

6. Align the upper and lower cases then snap them to close together.

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7. Tighten the screws.

BASIC OPERATION

TURNING ON THE CALCULATOR

Press [ON/C] to turn on your calculator. A " 0 " shows on the display. If

you leave your calculator on without making any calculation, it

automatically turns itself off in approximately 10 minutes to save

battery life.

Note: Even when the power is off, the calculator’s memory retains the

contents of the independent memory, constant memory registers, and

any program steps.

Normal Calculations

• The calculator operates using true algebraic logic; calculations can

be performed in the same sequence as the written formula.

• You can nest up to 42 parentheses at 6 levels, with up to 7

parentheses in one level.

Four Basic Calculations (Including Parenthesis

Calculations)

Example: 7 x 8 −4 x 5 (= 56 −20) = 36

Press Display Comment

[7] DEG

7. Enter value

[x] DEG

7. Enter operation

[8] DEG

Enter value to

operate by

[−]DEG

56.

Enter operation,

show result

[4] DEG

Enter value to

operate by

[x] DEG

4. Enter operation

[5] DEG

Enter value to

operate by

[=] DEG

36.

Enter operation,

show result

Example: 2 x [ 7 + 6 x (5 + 4) ] = 122

Press Display Comment

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[2] DEG

2. Enter value

[x] DEG

2. Enter operation

[ ( ] DEG

(

Enter operation,

show symbol

[7] DEG

Enter value to

operate by

[+] DEG

7. Enter operation

[6] DEG

Enter value to

operate by

[x] DEG

6. Enter operation

[ ( ] DEG

((

Enter operation,

show symbol

[5] DEG

Enter value to

operate by

[+] DEG

5. Enter operation

[4] DEG

Enter value to

operate by

[=] DEG

122.

Enter operation,

show result

• It is unnecessary to press the [ ) ] key before the [=] key

Constant Calculations

Example: 3 + 2.3 = 5.3 6 + 2.3 = 8.3

Press Display Comment

[3] DEG

3. Enter value

[+] DEG

3. Enter operation

[2] [•] [3] DEG

2.3

Enter value to

operate by

[=] DEG

5.3

Enter operation,

show result

[6] DEG

Enter value to

operate by

[=] DEG

8.3

Enter operation,

show result

Example: 7 −5.6 = 1.4 −4.5 −5.6 = −10.1

Press Display Comment

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[7] DEG

7. Enter value

[−]DEG

7. Enter operation

[5] [•] [6] DEG

5.6

Enter value to

operate by

[=] DEG

1.4

Enter operation,

show result

[4] [•] [5] DEG

4.5

Enter value to

operate by

[+/−]DEG

−4.5

Enter operation,

show result

[=] DEG

−10.1

Enter operation,

show result

Example: 2.3 x 12 = 27.6 −9 x 12 = −108

Press Display Comment

[1] [2] DEG

12. Enter value

[x] DEG

12. Enter operation

[2] [•] [3] DEG

2.3

Enter value to

operate by

[=] DEG

27.6

Enter operation,

show result

[9] DEG

Enter value to

operate by

[+/−]DEG

−9.

Enter operation,

show result

[=] DEG

−108.

Enter operation,

show result

Example: 74 ÷ 2.5 = 29.6 85.2 ÷ 2.5 = 34.08

Press Display Comment

[7] [4] DEG

74. Enter value

[÷] DEG

74. Enter operation

[2] [•] [5] DEG

2.5

Enter value to

operate by

[=] DEG

29.6

Enter operation,

show result

[8] [5] [•] [2] DEG

85.2

Enter value to

operate by

[=] DEG

34.08

Enter operation,

show result

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