Научный калькулятор CITIZEN SR-260N/NPU/NOR/NGR. Инструкция на русском языке

Contents
General guide .................................................................... 2
Power supply ................................................................................... 2
The keyboard................................................................................... 2
Display symbols............................................................................... 3
Display formats ................................................................................ 3
Order of operations.......................................................................... 4
Correction ........................................................................................ 5
Accuracy and Capacity .................................................................... 5
Overflow / Error conditions............................................................... 7
Basic calculation ............................................................... 8
Mixed arithmetic calculation............................................................. 8
Parentheses calculations................................................................. 8
Constant calculation......................................................................... 8
Percentage calculation..................................................................... 9
Memory calculation.......................................................................... 9
Scientific calculation....................................................... 10
Reciprocal, Factorial ...................................................................... 10
Square, Square / Cubic Root, Power, Root ................................... 10
Logarithms and Antilogarithms ...................................................... 10
Fraction calculation........................................................................ 10
Angular units conversion................................................................ 11
Trigonometric / Inverse trigonometric functions ............................. 11
Hyperbolic / Inverse hyperbolic functions....................................... 12
Rectangular / Polar coordinates..................................................... 12
Permutations, Combinations.......................................................... 13
Sexagesimal - Decimal form conversion ..................................... 13
Base-n mode calculation................................................................ 14
Complex numbers calculation........................................................ 14
Random numbers and Exchange key............................................ 15
Unit conversion .............................................................................. 15
Statistics calculation....................................................... 15
Computing single variable statistics............................................... 15
Viewing statistics data.................................................................... 17
Adding a data entry........................................................................ 17
Editing statistics data ..................................................................... 18
Delete error.................................................................................... 18
Weighted data entry method.......................................................... 19
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General guide
Power supply
On or Off :
To turn the calculator on, press [ON/C]; to turn the calculator off, press
[2ndF] [OFF].
Auto power-off  function :
This calculator automatically turns off it when not operated for
approximately 9 minutes. Power can be restored by pressing the
[ON/C] key again. Memory contents and the previous mode setting
(STAT, DEG, CPLX, Base-n,…) are retained even when power is
turned off or auto power-off.
Battery replacement :
The calculator is powered by two alkaline batteries (G13 or LR44).
When the display dims, replace the  batteries. Be careful not to be
injured when you replace the battery.
1. Unscrew the 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 properly. 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.
7. Tighten the screws.
The keyboard
Many of the calculator’s keys are used to perform more than one
function. The functions marked on the keyboard are printed differently
to help you find the one you need quickly and easily.
2nd function  -----        sin –1
1st function  ---       sin
1st functions
Those are the functions that are  normally executed when you press
the key.
2nd functions
The second function is printed above or to the right of the key. To
execute 2nd functions key, please press [ 2ndF ] then the
corresponding key. When you press [ 2ndF ], the “2ndF” indicator
shown in the display is to tell you that you will be selecting the second
function of the next key you press. If you press [ 2ndF ] by mistake,
simply press [ 2ndF ] again to remove the “2ndF” indicator.
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st
(Note) : [ A ], [ B ], [ C ], [ D ], [ E ], [ F ] are 1  functions in HEX mode.
Display symbols
Indicators shown on the display is to indicate you the current status of
the calculator.
DEG or RAD or GRAD : angular unit
M :    Independent memory         CPLX :   Complex number mode
E :    Overflow / Error           STAT :   Statistical mode
- :    minus                      2ndF :   [2ndF] key pressed
( ) :    Parenthesis calculation  CP :    Precision capability
BIN :   Binary mode               CPK :  Process capability
OCT : Octal mode                  ? :   Deviation
HEX : Hexadecimal mode            USL :    Setting upper limit
ED :    Edit mode                 LSL :    Setting lower limit
HYP : Hyperbolic mode
Display formats
The calculator can display numbers in four formats : floating point,
fixed point, scientific, and engineering.
Floating point display format
The floating point format displays numbers in decimal form, using up
to 10 digits. Any trailing zeros are truncated.
If the result of a calculation is too large to be represented in 10 digits,
the display automatically switches to scientific format.    If the result of
later calculations is small enough to be displayed in 10 digits, the
calculator returns to floating point format.
(Ex.) : Set the display in floating display format.
Step: Press [ 2ndF ] [ TAB ] [ ? ]     DEG
0.
Fixed point display format
The fixed point, scientific, and engineering formats use a fixed number
of decimal places to display numbers. If more than the selected
number of decimal places is keyed, it will be rounded to the correct
number of decimal places.
(Ex.) : Fix the display at 2 decimal places, then key in 3.256
Step 1: Press [ 2ndF ] [ TAB ] 2       DEG
0. 0 0
Step 2: key in 3.256 [ = ]             DEG
3. 2 6
On the contrary, if fewer than the selected number of decimal places
is keyed, it will be padded with trailing zero.
(Ex.) : Fix the display at 4 decimal places, then key in 4.23
Step 1: Press [ 2ndF ] [ TAB ] 4       DEG
0. 0000
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