# SCIENTIFIC CALCULATOR OPERATION GUIDE

SCIENTIFIC CALCULATOR OPERATION GUIDE

< EL-W531TL / W531TH / W531TG / W506T >

CONTENTS

HOW TO OPERATE

Read Before Using Key layout Reset switch/Display pattern Display format and decimal setting function Exponent display Angular unit

Functions and Key Operations

ON/OFF, entry correction keys

Data entry keys

Random key

Modify key

Basic arithmetic keys, parentheses

Percent

Inverse, square, cube, xth power of y, square root, cube root, xth root

Power and radical root

10 to the power of x, common logarithm, logarithm of x to base a

Exponential, logarithmic

e to the power of x, natural logarithm

Factorials

Permutations, combinations

Time calculation

Fractional calculations

Memory calculations

~

Last answer memory

User-defined functions

~

Absolute value

Trigonometric functions

4 5 5-6 6 7

8 9 10 11 12 13

14 15-17

18 19-21

22 23 24-26 27 28 29 30 31 32 33-37

2

Arc trigonometric functions

Hyperbolic functions

Coordinate conversion

Binary, pental, octal, decimal, and hexadecimal operations (N-base)

Differentiation calculation

Integration calculation

d/dx x dx x

Simultaneous calculation

Polynomial equation

Complex calculation Statistics functions

i

DATA INS-D STAT

Data input for 1-variable statistics

"ANS" keys for 1-variable statistics

Data correction

Data input for 2-variable statistics

"ANS" keys for 2-variable statistics

Matrix calculation

38 39-42

43

44 45-46 47-49 50-52 53-56 57-58

59 59 60-61 62 63 64-66 67-68

3

How to Operate

Read Before Using

This operation guide has been written mainly based on the EL-W531TL/W531TH/W531TG model. And some functions described here are featured on the EL-W506T model only. Note that key operations and symbols on the display may differ according to the model.

1. KEY LAYOUT (EL-W531TL) Mode key

This calculator can operate in four different modes as follows.

[NORMAL mode] ?Mode = 0; normal mode for performing normal arithmetic and function calculations.

[STAT mode] ?Mode = 1; mode for

performing 1- or 2-variable

statistical calculations. To

select the sub-mode, press

the corresponding number

key after

.

Single variable statistic calculation

Linear regression calculation

Quadratic regression calculation

Euler Exponential regression calculation

Logarithmic regression calculation

Power regression calculation

2nd function, ALPHA keys Pressing these keys will enable the functions written in orange (2nd F) or green (ALPHA) above the calculator buttons. ON/C, OFF key

Written in orange above the ON/C key

Inverse regression calculation

Exponential regression calculation

[TABLE mode] [DRILL mode]

?Mode = 2; mode for showing the changes in values of a function in table format.

?Mode = 3; mode for

performing drill calculations.

To select the drill sub-mode,

press the corresponding

number key after

.

HOME key

(MATH): Math drill

Pressing this key will return to NORMAL mode.

(TABLE): Multiplication table drill

NOTE: The EL-W506T model has another modes (Complex, Equation, Matrix, Vector and Distribution modes).

4

2. RESET SWITCH

If the calculator fails to operate normally, press the reset switch on the back to reinitialize the unit. The display format and calculation mode will return to their initial settings.

NOTE:

Pressing the reset switch

will erase any data stored

in memory.

RESET

3. DISPLAY PATTERN

Hyperbolic symbol (HYP) 2ndF symbol Appears when the entire equation cannot be displayed.

Memory symbol

Alphabet symbol (ALPHA)

Angular unit indicator

(DEG/RAD/GRAD)

Display format indicator (FIX, SCI, ENG, N1, N2)

WriteView mode (View as it is written)

Appears when the entire equation cannot be displayed.

Equation display

Answer display

Reset switch

NOTE: The actual display does not appear like this.

This illustration is for explanatory purposes only.

4. DISPLAY FORMAT AND DECIMAL SETTING FUNCTION

For convenient and easy operation, this model can be used in one of five display modes. The selected display status is shown in the upper part of the display (Display format indicator). Note: If more 0's (zeros) than needed are displayed when the ON/C key is pressed, check whether or not the calculator is set to a Special Display Format.

? Floating decimal point format 1/2 (N1/N2 is displayed)*1 Valid values beyond the maximum range are displayed in the form of [10-digit (mantissa) + 2-digit (exponent)]

? Fixed decimal point format (FIX is displayed) Displays the fractional part of the calculation result according to the specified number of decimal places.

? Scientific notation (SCI is displayed) Frequently used in science to handle extremely small or large numbers.

? Engineering scientific notation (ENG is displayed) Convenient for converting between different units.

*1 The calculator has two settings for displaying a floating point number: NORM1 (default setting) and NORM2. In each display setting, a number is automatically displayed in scientific notation outside a preset range: ? NORM1: 0.000000001 ................

................

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