Caretec Platon User manual

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___________________________________________________________________________________________
Manual
Platon
Speaking Scientific Calculator

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CONTENTS
1. Introduction ..................................................................... page-03
2. Description of the device ................................................ page-03
3. Power supply .................................................................. page-03
4. Keyboard layout .............................................................. page-04
4.1 Description of buttons in calculator mode ……..... page-05
4.2 Description of buttons in statistic mode ……….... page-07
4.3 Turn Platon on/off ……………................................ page-08
4.4 Exiting a menu manually ..................................... page-08
4.5 Key lock ……....................................................... page-08
4.6 Volume ............................................................... page-08
5. Calculations .................................................................. page-08
5.1 Basic arithmetic operations ................................. page-09
5.2 Extended arithmetic operations .......................... page-09
5.3 Scientific functions ……………............................ page-10
5.4 Conversions …………......................................... page-11
5.5 Financial calculatior ............................................ page-12
6. Statistics ....................................................................... page-14
7. Menu ............................................................................ page-15
7.1 Volume .............................................................. page-16
7.2 Number output .................................................. page-16
7.3 Decimal place ................................................... page-16
7.4 Display mode .................................................... page-16
7.5 Goniometer ........................................................ page-17
7.6 Clock .................................................................. page-17
7.6.1 Alarm clock ...................................................... page-17
7.6.2 Time ............................................................... page-17
7.6.3 Date ................................................................. page-18
8. Safety instructions ...................................................... page-18
9. Maintenance ................................................................. page-18
10. Tecnical data .............................................................. page-18
11. Warranty and service .................................................. page-19
12. Legal notice concerning the disposal of waste ............. page-19
13. Symbols used .............................................................. page-20

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1. Introduction
PLATON, our scientific calculator with integrated speech output, not only
provides the standard arithmetic functions, but also combines numerous
scientific and other functions in one small and handy device!
2. DESCRIPTION OF THE DEVICE
The case is long and flat with a shape similar to a remote control. On the
surface are various keys, as well as the noticeable, flat display. Put the
device in front of you so that the end with the display is furtherest away from
you.
Upper Side: All the keys can be found on the upper side. They are
subdivided into 2 groups. The first group (nearest to you) consists of 4 rows,
each including 4 small, square keys. The second group consists of 3 rows,
each including 3 bigger, rectangular keys.
Left Side: On the left side of the device, you can find the socket for an
optional power supply (not included).
Right Side: On the right side of the device, there are two outlets. The one
farther away is a service outlet for our technicians. The one nearer to you is
an earphone socket (earphones are also optional and not included).
Bottom Side: On the bottom side of the device, you will find four little rubber
feet, the loudspeaker grill and the battery compartment.
3. POWER SUPPLY
Batteries: PLATON operates with 2 x 1.5V AAA batteries. The battery
compartment is situated on the bottom side of the device. To insert the
batteries, turn over the device with the display end still furtherest away from
you. Right between the two upper rubber feet, you can feel a little notch. This
is where you can open the battery compartment. Please note, that the lid is
not completely removable! Put two 1.5V AAA batteries in the compartment
with the flat (negative) end of each battery contacting the coil. Close the lid
until it locks in place.
ATTENTION: You must not start to work with PLATON unless
you have read and understood this manual! Store this manual for
later references and hand it on together with the PLATON if
necessary.

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Power Supply: Platon can also be operated with a power supply unit. The
power supply unit is not included in the delivery and has to be ordered
separately! The socket for the power supply unit is located on the left side of
the device.
4. KEYBOARD LAYOUT
The keyboard is subdivided into 2 groups: the lower group consists of 4 rows,
each including 4 small, square keys. The upper group consists of 3 rows,
each including 3 bigger, rectangular keys. Each key of the upper group
operates two functions. In the following, we will describe each row top down
The button in row 1 column 1 has a shift function as known from a PC. A
short press activates the second level (layer) of functions connected to the
buttons and pressing long activates the third level.
Display
Upper
Group of Keys
Lower
Group of Keys
7. Row
6. Row
5. Row
4. Row
2. Row
3. Row
1. Row
CAUTION: Replace the batteries as soon as the device announces
„battery weak“.

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4.1 Description of Buttons in Calculator Mode:
Button
Layer 1
Layer 2
Layer 3
Row
Column
Short
Long
1
1
2nd
3rd
-
-
1
2
Recall
Memory
Save value
Add value
-
1
3
Delete or
turn on
1 Step back
Delete 1
Memory
Delete all
Memories
2
1
Quadrat
To the
Power of
Announce
Time
-
2
2
-
Menue
Statistic
Mode
-
2
3
Square
Root
Roots
Announce
Date
-
3
1
Left
Parenthesis
-
-
-
3
2
Right
Parenthesis
-
-
-
3
3
Algebraic
Sign
Reziprocal
value
Exponent
-
4
1
Digit 7
Digit 7
Sinus
Arcus Sinus
4
2
Digit 8
Digit 8
Cosinus
Arcus
Cosinus
4
3
Digit 9
Digit 9
Tangent
Arcus
Tangent
4
4
Divided by
Modulo
Change
Display
-
5
1
Digit 4
Digit 4
Sinus
hyperbolicus
Area Sinus
hyperbolicus
5
2
Digit 5
Digit 5
Cosinus
hyperbolicus
Area
Cosinus
hyperbolicus
5
3
Digit 6
Digit 6
Tangent
hyperbolicus
Area
Tangent
hyperbolicus
5
4
Times
Percent
Choice of
number
system
-
6
1
Digit 1
Digit 1
Natural
Logarithm
e to the
power of
6
2
Digit 2
Digit 2
Common
logarithm
10 to the
power of
6
3
Digit 3
Digit 3
Pi
factorial
6
4
minus
Algebraic
sign (in front
of Digit)
Convert to
Convert to
Dezimal
Hours

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7
1
Digit 0
Digit 0
Choice of
Degree
Convert
Degree
7
2
Point
Negate
-
-
7
3
Equals,
execute
calculation
Execute
choosen
scientific
function
-
-
7
4
plus
Execute
choosen
scientific
function
inversely
-
-
Save values: In order to save numbers in memory, choose the function “save
value” (press and hold the button in the middle of the first row) and select a
memory cell from number keys 1 to 9. This way the value is stored in the
appropriate location (there are up to 9 different memory locations).
Select stored values: Use the function “recall memory” (short press on
middle button of the first row) and then press the corresponding number key
to select the value from a memory location (1 to 9).
Delete stored values: To delete a single space, select the function “delete
one memory” (shift two and then on the right button of the top row) and then
press a numeric key to delete a memory space (1 to 9). To delete all saved
values, use function “delete all memories” (shift three and then press and
hold the right button of the top row).
In addition there are multiple combinations of buttons. (several buttons have
to be pressed at the same time in order to end up with certain functions):
Square + Square root (short): change to help mode (for details to Help mode
please go further down in this manual)
Square + Square root (long): show/announce version number of software
Menue + Square: volume down
Menue + Square root: volume up
Digit 0 + Plus: Key lock

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4.2 Description of Buttons in Statistic Mode:
With the button menue in the second layer you change into the statistic mode
([2nd] [Menü]). In the statistic mode there are several statistical functions
available but no basic calculations possible.
Button
Layer 1
Layer 2
Layer 3
Row
Column
Short
Long
1
1
2nd
3rd
-
-
1
2
-
-
-
-
1
3
Exit
statistic
mode
1 Stepp
back
-
-
2
1
Arithmetic
mean
value
Geometric
mean value
- Announce
Time
-
2
2
-
-
End statistic
mode
-
2
3
Root mean
square
value
Harmonic
mean
- Announce
Date
-
3
1
Sum of all
values
Product of
all values
-
-
3
2
Standard
deviation
Number of
all values
-
-
3
3
Sum of
squres of
all values
Summ of
reciprocal
values
-
-
4
1
Digit 7
Digit 7
-
-
4
2
Digit 8
Digit 8
-
-
4
3
Digit 9
Digit 9
-
-
4
4
-
-
-
-
5
1
Digit 4
Digit 4
-
-
5
2
Digit 5
Digit 5
-
-
5
3
Digit 6
Digit 6
-
-
5
4
Factorial
-
-
-
6
1
Digit 1
Digit 1
-
-
6
2
Digit 2
Digit 2
-
-
6
3
Digit 3
Digit 3
-
-
6
4
Deduct a
number
-
-
-
7
1
Digit 0
Digit 0
-
-
7
2
Point
-
-
-
7
3
Repeat
result
-
-
-
7
4
Add a
number
-
-
-

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Again there are combinations of buttons to press to end up with certain
functions:
Square + Square root (short): change into help mode (for details to Help
mode please go further down in this manual)
Square + Square root (long): show/announce version number of software
Menue + Square: volume down
Menue + Sqaure root: volume up
Digit 0 + Plus: Key lock
4.3 Turn Platon on/off
In order to turn Platon on press the button on/c (right button of first row). After
some time without pressing a button Platon goes into a stand by mode. In
this mode the time is shown. In order to get into stand by mode manually
press all three buttons of the first row at the same time till you hear a beep.
4.4 Exiting a menue manually
For a general function of escape in the menue please press the button delete
for a short time (1. row, right button).
4.5 Key lock
In order to activate or deactivate key lock press the buttons 0 and + at the
same time till you hear a beep (lowest row, left and right buttons).
4.6 Volume
In order to increase the volume please press menue and square root at the
same time several times (second row middle and right). In order to decrease
the volume please press square and menue at the same time (second row
left and middle). The step of volume is announced.
Attention: there is a step with volume 0 which means Platon is silent!
5. Calculations
With Platon you can execute all basic arithmetic operations, percent
calculations, extract roots and square, and you have trigonometric functions,
logarithms (natural and common), and hyperbolic functions.
The way of entering data is orientated in lines which means that you enter the
whole calculation first, than press enter and the whole line is calculated. The
common laws of arithmetic are followed with it (multiplications before
additions). For more complicated calculations you can use parenthesises.

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The whole process of entering data and the result is announced. If you want
to repeat the result, just press the equals button again and again. If you had
an error by entering on digit, you can delete the last data by pressing the
delete button (1. row, right button) long.
Numbers can be shown in three ways:
* Decimal floating point:
This is the default value. Numbers are shown as decimal numbers. If the
space of the display is over or under floated, Platon changes automatically to
exponent of 10 mode.
* Scientific:
Independent from the size of the number there is always an exponent
shown.
* Technical:
As in the scientific mode there is always an exponent shown. This
exponent can always be divided by three.
In Addition you can diminish the number of decimal places in all three modes.
The display rounds the number to the shown decimal places.
5.1 Basic Arithmetic Operations
Addition (plus), subtraction (minus), multiplication (times), and division
(divided by) count to the basic arithmetic operations. In order to execute one
of these operations please enter a number, then chose an operator (the right
button of rows 4 to 7), then enter another number and finally enter the equals
button (row 7, second button from the right)
5.2 Extended Arithmetic Operations
Automatic calulation of percentages, squaring and extracting roots are with
the extended arithmetic operations.
5.2.1 Automatic Calculation of Percentages
Calculating percentages you face different tasks:
Calculation
Example
Input
Percent
How much are 5% from 250
250 x 5 %
Percentage
250 are 5% from how much
250 / 5 %
Surcharge
How much are 250 plus 5%
surcharge
250 + 5 %
Discount
How much are 250 minus 5%
discount
250 –5 %
In order to find out how much are 5% from 250 please enter first 250, then
you press the button times (row 5 right button), then enter 5 and finalise the
operation by pressing the button % (long press on times).

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5.2.2 Squaring
In order to square a number please enter the number than press the buttons
square (row 2 left button) and equals.
5.2.3 Extracting Square Roots
In order to extract a square root of a number please enter the number than
press the buttons square root (row 2 right button) and equals.
5.2.4 Reziprocal Value
In order to get the reciprocal value of a number please entert he number and
then press the buttons arithmetic signs (row 3 right button) for long and then
equals.
5.2.5 To the power of
In order to put a number to the power of please enter the number, press the
button square (row 2 left button) for long, then enter the exponent and the
button equals. The exponent doesn’t have to be an integer number.
5.2.6 Extracting of Roots
With Platon you can extract any roots not only square roots. First enter the
number you want to extract the root from. Then please press the button
square roots (row 2 left button) for long. For next you enter the exponent of
the root and finally press equals. The exponent of the root doesn’t have to be
an integer number.
5.2.7 (Pi)
In order to calculate with pi please enter 2nd and 3.
5.3 Scientific Functions
As scientific functions Platon offers you trigonometric functions, logaritms,
and hyperbolical functions with their reciprocal values.
As an alternative to complicated multiple combinations of buttons you can
preselect a function, which you can use by pressing equals for long or + for
long for the reciprocal function. The preselection is done over the menue
(trigonometric functions, hyperbolical functions, or logarithms). Preselect the
function you need and execute the calculation with a long press on equals or
+.
Example: calculating natural logarithms
1 long press on menue (row 2 middle) announcement: “trigonometric
functions”
2 press 2 times on square root (row 2 right button) announcement:
“hyperbolical functions” – “logarithms”
3 long press on menue announcement “logrithms select” - “natural
logarithms”
4 short press on menue announcement “natural logarithm”