Sight Enhancement Systems sci-plus 300 series Owner's Manual
How to perform scientific,
statistical and trignometric
calculations with your Sci-Plus
calculator.
Owner's manual
Sci-PlusSci-Plus
Sci-Plus
series 300
talking scientific calculator
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”.
nd
To turn the calculator off, press the [2
key. After power down, all memory is cleared.
]. Followed by [O/I]
Key
[ O/I ]
.
2
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
memory or the statistics register
clear the
3
Key
Function
nd
]
[2
[ Å ]
Instructs calculator to perform the second
nd
] function of the next key that is pressed
[2
(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
nd
speech mode press [2
] followed by
y
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
as long as it is in speech mode.
y
nd
To reset to display mode press [2
]
y
or turn the calculator OFF and then ON
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
Indicator
“–“
nd
“[2
]”
“D”
“R”
“G”
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
Indicator
“( )”
“STAT”
“K”
8
.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
“M”
“E”
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.
6
For example, 2.567x10
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:
1. Single-variable functions -- including trigonometric,
logarithmic, square, square root, factorial, percent,
reciprocal, angle conversion, and sign change.
x
2. Two variable functions -- including exponential (y
x
and roots (
√y), multiplication and division, addition and
)
subtraction.
3. Pressing [=] completes all operations.
13
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