series

300

s

s

talking scientific calculator

Owner's manual

How to perform scientific, statistical and trignometric calculations with your Sci-Plus calculator.

sight enhancement systems

60 Bathurst Drive, Unit #17

Waterloo, Ontario Canada N2V 2A9

Tel - (519) 883-8400 Fax - (519) 883-8405 www.sightenhancement.com

The

Sci – Plus 300

Scientific Calculator allows you to perform a wide range of mathematical, trigonometric and statistical calculations. This manual describes how to perform these operations, select speech options and care for your calculator.

Battery and charging information

The internal lithium-Ion battery in your calculator will normally provide operation for more than 80 hours, but must be recharged when “BAT LO” is displayed. It is also recommended that the battery be recharged if an extended period of storage is expected. Plug the charger into an outlet and insert the jack into the charge socket on the left side of the calculator. A full charge will take 8 - 10 hours. After long periods of storage (6 – 8 months) the battery may become fully discharged and the calculator will remain inoperative until the battery has recovered normal operating voltage. If the calculator does not function after charging, it must be returned to an authorized service centre for the battery to be replaced.

Alternate wall adapter plugs can be provided for most countries – please contact Sight Enhancement Systems if you need a different plug for your country.

1

Basic Operations

Turning the Calculator On and Off

To turn the calculator on, press the [ O/I ] key. The calculator starts in display mode with all memory cleared, the angle units set to degrees, and the display shows “0”.

To turn the calculator off, press the [2

nd

]

.

Followed by [O/I] key. After power down, all memory is cleared.

2

.

Key

[ O/I ]

Function

Turns calculator on. Clears memory and display. Resets angle units to degrees When pressed once during a calculation (but before an operation key), clears the display entry and any error condition (“E”). A new entry can be made, and calculation can proceed. Pressing [ O/I ] does not clear the memory or the statistics register

3

Key

[2 nd

]

[

Å ]

Function

Instructs calculator to perform the second

[2 nd

] function of the next key that is pressed

(the function in yellow text on the key).

Backspace key deletes one entry at a time.

It can be used to clear an entire entry by repeated delete actions.

4

Speech Output

For the calculator to operate in speech mode a headset, earphone or amplified speaker must be plugged into the earphone socket on the right side of the calculator and speech mode selected. . The headset or earphone requires a 3.5 mm diameter audio jack, should have 32 ohm impedance, and no more than 100 mWatts power. An amplified external speaker can also be used – the type used for portable sound players is ideal. If you are unsure of the correct device to use please contact Sight enhancement systems for advice.

5

Selecting speech mode

On start-up the calculator is set to display mode. To select speech mode press [2

nd

] followed by

The calculator will now speak all keystrokes and the results on the display. The volume can be controlled by pressing the up and down arrow buttons to the right of the display.

The calculator will read the display at any time by pressing y

as long as it is in speech mode.

To reset to display mode press [2

nd

] or turn the calculator OFF and then ON y

6

The Display

A maximum of eight digits can be shown on the display. Any additional digits entered will be ignored.

The calculator display has been manufactured to provide the highest contrast for viewing in normal room lighting. To obtain the best clarity it should be viewed at a slight angle.

The display also provides status indicators as described in the following table.

7

“D”

“R”

“G”

Indicator

“–“

“[2 nd

]”

Meaning

The displayed number has a negative value

The [2

nd

] key has been pressed. The next key that is pressed will perform the function in yellow text on the key.

Angle units are set to degrees.

Angle units are set to radians

Angle units are set to grads

8

Indicator

“( )”

“STAT”

“K”

“M”

“E”

.Meaning

One or more parentheses are open

The calculator is in its statistics mode, and the statistics register contains data.

A number and operation are stored as a constant

A number is stored in the memory.

An error has occurred. Press [ O/I ] to reset.

9

Scientific Notation

When using scientific notation, numbers are expressed as a mantissa multiplied by 10 to an exponential power

(exponent).

Entering a Number in Scientific Notation

Enter the mantissa. If it is negative, use the [+/-] key to change the sign. Press [EE]. Two zeros will appear on the right side of the display. Enter the numerical exponent (one or two digits). If the exponent is negative, use the [+/-] key to

10 change the sign. If you make a mistake entering the exponent, simply re-enter the correct digits.

For example, 2.567x10

6

is entered as 2.567 [EE] 6, and is displayed as 2.567 06. To revert to decimal press [EE] again.

Converting a Number to Scientific Notation

To convert any displayed number from standard display format to scientific notation, press [EE] followed by [=].

11

Correcting Entry Errors

At any point during a calculation, you can press [ O/I ] to clear all calculations, including any erroneous entries, and start all over. You can also use the [

Å] key to delete single digit entries.

Clearing an Error Condition

The display shows “E” whenever an error, overflow, or underflow occurs, or an improper operation attempted. No further key commands will be accepted until the error condition is cleared. Pressing [ O/I ] clears the error and all pending operations.

12

Order of Calculations

The

Sci – Plus 300

Scientific Calculator completes operations in accordance with the following order of priority: logarithmic, square, square root, factorial, percent, reciprocal, angle conversion, and sign change.

2.

Two variable functions -- including exponential (y x and roots ( x

√y), multiplication and division, addition and

) subtraction.

13

[+], [-],

[

×],[÷]

[=]

[+

/-]

Basic Functions

Key Function

Perform addition, subtraction, multiplication, and division

Example: 13 [x] 2 [+] 4 [=] gives 30

Example: 9 [

÷] 3 [-] 1 [=] gives 2

Completes all pending operations

Changes the sign (positive or negative)

Example: 6 [+

/-] [+] 8 [=] gives 2

14

Key

[2 nd

] [

π]

[x!]

[%]

[x

2

]

Function

Enters the value

π.

Calculates the factorial of the number.

Example: 6 [x!] gives 720

Converts the displayed number to a percentage.

Example: 656 [%] gives 6.56

Calculates the square of the displayed number

Example: 13 [x

2

] gives 169

15

Key

[y x

]

[(] [)]

Function

Raises the displayed number (y) to the power x.

Example: 7 [y

x

] 3 [=] gives 343

Operations in parentheses are given priority over operations outside parentheses.

Up to 3 levels of parentheses can be entered. Pressing [=] closes any open parenthetical expressions

Example: 20 [

÷] [( ] 2 [+] 3 [ )] [=] gives 4

16

Key

[1/x]

[2 nd

] [

√x]

[2 nd

][ x

√y]

Function

Calculates the reciprocal of the number.

Example: 8 [1/x] gives 0.125

Calculates the square root of the the displayed number.

Example: 144 [2

nd

] [

√x] gives 12

Calculates the specified root (x) of the displayed number (y).

Example: 125 [2

nd

][ x

√y] 3 [=] gives 5

17

Key

[LOG]

[LN]

[2 nd

] [e x

]

Function

Calculates the common logarithm (to the base 10) of the displayed number.

Example: 1000 [LOG] gives 3

Calculates the natural logarithm (to base e) of the displayed number.

Example: 3 [LN] gives 1.0986122

Calculates the natural antilogarithm (to base

e) of the displayed number.

Example: 4 [2

nd

] [e x

] gives 54.598150

18

Key

[2 nd

] [10 x

]

[2 nd

] [FIX]

Function

Calculates the common antilogarithm of the displayed number (10 raised to the power of the number).

Example: 2 [2

nd

][10 x

] gives 100

Sets the number of decimal places that the calculator will display

Example: [2 nd

] [FIX] 3 sets the calculator to display 3 decimal places.

[2 nd

] [FIX] [0] reverts to normal display

19

Key

[+] n [%] [=]

[-] n [%] [=]

[x] n [%] [=]

[

÷]n [%] [=]

Function

Adds n% to the displayed number.

Example: 11 [+] 10 [%] [=] gives 12.1

Subtracts n% from the displayed number

Example: 11 [-] 10 [%] [=] gives 9.9

Multiplies the displayed number by n%.

Example: 11 [x] 10 [%] [=] gives 1.1

Divides the displayed number by n%.

Example: 11 [

÷] 10 [%] [=] gives 110

20

Fraction calculations

Fractions are entered in the format: Number [Ab/c] numerator [Ab/c] denominator and displayed as A_b_|c

Example: to add 1 1/8 + 2 1/16 = 3 3/16

Enter: 1 [Ab/c] 1 [Ab/c] 8 [+] 2 [Ab/c] 1 [Ab/c] 16 [=]

Example: to subtract 1 1/8 from 2 1/16 = 15/16

Enter: 2 [Ab/c] 1 [Ab/c] 16 [-] 1 [Ab/c] 1 [Ab/c] 8 [=]

To convert fractions to a decimal enter number then [=].

Example: 15 [Ab/c] 16 [=] 0.9375

21

Using the memory

The calculator’s memory can store data as long as the calculator is turned on. You can store a number in memory for repeated use in a calculation or to keep a running total.

Key

[STO]

Function

Stores the displayed number in memory, replacing any previously stored number

Example: 15 [STO] [x] 2 [=] gives 30 (and stores 15 in memory indicated by “M” in display).

22

Key

[RCL]

[SUM]

Function

Recalls and displays the number that is in memory. Does not change or clear memory.

Example: [RCL] [+] 4 gives 19 (15 remains stored in memory as indicated by “M” in display).

Adds the displayed number to the current number in memory. Adjusts number in memory without affecting the displayed number or any calculations in progress.

Example: 4 [SUM] displays M 4

[RCL] displays M 19

23

Key

[EXC]

Function

Swaps the number in memory with the displayed number. The displayed number is stored, and the previously stored number is displayed.

(Assuming that 19 now is stored in memory)

Example: 2 [x] 6 [=] gives M 12.

[EXC] displays M 19.

[EXC] displays M 12.

Note: Pressing [ O/I ] will not clear the memory. Pressing zero [0] then [STO] or power off [2

nd

] [ O/I ] then on [ O/I ] will clear memory.

24

Constant Calculations

The constant key [K] simplifies repetitive calculations by storing a number and its associated operation for repeated use.

To enter a constant operation:

1. Enter the repetitive number “p”.

2. Press the operation key that is required.

25

Key p[+][K] p[-][K] p[x][K] p[

÷][K]

p[y x

][K] p[2 nd

][ x

√y][K]

Function

Adds “p” to each subsequent entry.

Subtracts “p” from each subsequent entry.

Multiplies each subsequent entry by “p”.

Divides each subsequent entry by “p”.

Raises each subsequent entry to power “p

”

Takes root “p” of each subsequent entry.

26

After storing the constant (K), you can complete each new repeated calculation by simply entering the new number and pressing [=]. To erase the constant, clear the calculator or enter any of the above arithmetic keys.

Setting Angles

Before starting any trigonometric calculation, use the [DRG] key to select the appropriate angle units. “D” indicates degree units, “R” indicates radian units, and “G” indicates grad units (1/100th of a right angle).

27

Key

[DRG]

[2 nd

] [DRG

Î]

Function

Sequentially changes the angle units (as noted on the display – D, R or G). However, does not affect the displayed angle value.

Changes the angle unit setting and converts the displayed value to its equivalent value for the new units.

Example: 30 D (degrees) 30

[2

[2 nd nd

] [DRG

Î] gives R (radians) 0.5235987

] [DRG

Î] gives G (Grad) 33.333333

28

Trigonometric Functions

Key

[SIN], COS],

[TAN]

[2 nd

][SIN

-1

],

[2 nd

[2 nd

][COS

-1

],

][TAN

-1

]

Function

Calculates the sine, cosine, or tangent of the displayed angle.

Example: 45 [SIN] = 0.7071067

Calculates the arcsine, arccosine, or arctangent of the displayed angle.value.

Examples: 0.5 [2

0 [2

1.0 [2

nd nd nd

][SIN

][COS

][TAN

-1

-1

] gives D 30.

] gives D 90.

-1

] gives D 45.

29

Degree Format Conversion

An angle measured in degrees, minutes and seconds (DMS)

.

must be converted to decimal degrees (DD) before it can be used in a calculation.

Degrees, Minutes and Seconds (DMS)

DMS angles are entered in D.MMSSsss format:

D

Degrees (º) – 0 to 8 digits

Decimal point separator

30

MM

SS

Minutes (') – must be two digits.

Seconds (") – must be 2 digits.

sss

Fractional part of second

Example: 52º2'16.75" is entered as 52.021675.

31

.

D

Decimal Degrees (DD)

DD angles are entered in a D.ddddddd format.

ddddddd

Degrees (º)

Decimal point separator

Fractional part of a degree.

Example: 28.775º is entered as 28.775.

32

Converting Angles

The

Sci – Plus

300 calculator converts angle measurements from DMS to DD by pressing [2

nd

] [>DD] and

DD to DMS by [2

nd

] [>DMS]

Note: [>DMS] is the 2 nd

function of [+/-] key.

Example: Convert 26º5'12.2" to decimal degree (DD) format, and then back to degree, minute, seconds (DMS) format.

Format

DMS format

DD format

DMS format

Keystrokes

Enter 26.05122

Enter [2

Enter [2

nd nd

] [>DD]

] [>DMS]

Display

26.05122

26.086722

26.05122

33

Rectangular-to-Polar Conversions

Pressing [2

nd

][R > P] converts rectangular coordinates (x,y) to polar coordinates (r,

θ

).

Example: Convert the rectangular coordinates (10,8) to polar coordinates.

Sequence Keystroke

Enter x and y

10 [2

Value of

θ

[2 nd nd

][x

][R >

Ùy] 8

⎜P]

Display

8

12.806248

Value of r

Value of

θ

[2

[2 nd nd

][x

Ùy]

][x

Ùy]

38.659808

12.806248

To alternate between the two converted values (r and

θ), press [2

nd

][x

Ùy] repeatedly.

34

Polar-to-Rectangular Conversions

Pressing [2

nd

][P > R] converts polar coordinates (r,

θ

) to rectangular coordinates (x,y).

Example: Convert the polar coordinates (5, 30°) to rectangular coordinates.

Sequence Keystroke

Enter r and

θ

5 [2 nd

][x

Ùy] 30

Value of y

[2 nd

][P > R]

Value of x

Value of y

[2 nd

[2 nd

][x

][x

Ùy]

Ùy]

Display

30

4.330127

2.5

4.330127

To alternate between the two converted values (x and y), press [2

nd

][x

Ùy] repeatedly.

35

Statistical Functions

The

Sci - Plus

300 can perform statistical analysis on onevariable data.

Key

[

∑+]

[2 nd

] [

∑−]

Function

Enters the displayed number as a data point in the statistics register.

Removes the displayed number from the statistics register.

36

Key

_

[2 nd

] [x]

[2 nd

][

σn]

[2 nd

][

σn-1]

[2 nd

][

σn][x

2

]

Function

Calculates the mean of the entered data set.

Calculates the standard deviation for the entered data (n weighting).

Calculates the sample standard deviation for the entered data (n -1 weighting).

Calculates the variance using n weighting

(for the population data).

37

Key

[2 nd

[x

2

]

][

σn-1]

[2 nd

] [

∑x]

[2 nd

][CSR]

Function

Calculates the variance using n -1 weighting (for the sample data).

Calculates the sum of the entered data points.

Clears all data points from the statistics register and the “STAT” indicator.

38

Example: Analyse the following test scores (88,72,56,77, 91).

Assume that these five students are the entire population.

Action Keystrokes Display

Clear display

[ I/O ]

Clear statistics register [2

nd

1 st

[

0

][CSR] 0

entry 88

2 nd

3 rd

4 th

5 th

39

_

Class average (mean) [2

nd

] [x] 76.8

Standard deviation [2

nd

][

σn] 12.512394

Sum of scores [2 nd

][

∑x] 384

Variance [2

nd

][

σn] [x

2

] 156.56

Important: After completing any statistical calculation, remember to press [2

nd

][CSR] to clear the statistics register and return to arithmetic calculations.

40

Warranty and Service

Your new

Sci – Plus 300

Scientific Calculator has been built by Sight Enhancement Systems to provide years of reliable service. If your calculator should cause problems for any reason please contact us by

Tel: 519 883-8400 or

Fax: 519 883-8405 or by

Email to: [email protected]

41

Once a fault has been confirmed we will provide a Return Material

Authorization (RMA) number and the procedure for repair. We will require the serial number from the label on the base of the calculator, and a brief description of the problem.

It is important that you do not return the calculator to the factory without a Return Authorization.

42

series

300

s

s

talking scientific calculator

Owner's manual

How to perform scientific, statistical and trignometric calculations with your Sci-Plus calculator.

sight enhancement systems

60 Bathurst Drive, Unit #17

Waterloo, Ontario Canada N2V 2A9

Tel - (519) 883-8400 Fax - (519) 883-8405 www.sightenhancement.com