Научный калькулятор CITIZEN SR-270N/NPU/NOR/NGR. Инструкция на русском языке

Table of Contents
General Guide ................................................................................. ................................................................................. 22
Turning on or off ........................................................................... ........................................................................... 22
Battery replacement ..................................................................... ..................................................................... 22
Auto power-off  function ............................................................... ............................................................... 22
Reset operation ............................................................................ ............................................................................ 22
Contrast adjustment ..................................................................... ..................................................................... 33
Display readout ............................................................................ ............................................................................ 33
Before starting calculation ............................................................ ............................................................ 44
Mode Selection ............................................................................ ............................................................................ 44
Using “ 2nd ” keys ........................................................................ ........................................................................ 44
Cursor...................................................................................................................................................................................... 44
Making corrections during input ................................................... ................................................... 44
Replay function ............................................................................ ............................................................................ 55
Error position display function ...................................................... ...................................................... 55
Memory calculation ...................................................................... ...................................................................... 55
Stack ............................................................................................ ............................................................................................ 66
Order of operations ...................................................................... ...................................................................... 66
Accuracy and Capacity ................................................................ ................................................................ 66
Error conditions  ........................................................................... ........................................................................... 88
Basic Calculation........................................................................................................................................................ 88
Arithmetic calculation ................................................................... ................................................................... 88
Parentheses calculations ............................................................. ............................................................. 99
Percentage calculation ................................................................. ................................................................. 99
Display formats.......................................................................................................................................................... 99
Continuous calculation function ................................................. ................................................. 1100
Answer function .......................................................................... .......................................................................... 1100
Scienti? c Calculation ................................................................... ................................................................... 1100
Logarithms and Antilogarithms ................................................... ................................................... 1100
Fraction calculation .................................................................... .................................................................... 1100
Angle units conversion ................................................................ ................................................................1111
Trigonometric / Inverse-Tri. functions .......................................... ..........................................1111
Hyperbolic / Inverse-Hyp. functions ............................................ ............................................1111
Sexagesimal - Decimal transformation .................................... .................................... 1122
Coordinates transformation ........................................................ ........................................................ 1122
Probability...................................................................................................................................................................... 1122
Other functions ( x –1 ,  ,  ,  , x 2 , x 3,  x y  ) ................................ ................................ 1122
Standard Deviation Calculation  ................................................. ................................................. 1133
Regression Calculation .............................................................................................................................. 1133
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General Guide
Turning on or off
To turn the calculator on, press [  ON /AC ] ; To turn the calculator off,
press [ 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 ? at 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 ? at sides (plus termi-
nals) up.
6.    Align the upper and lower cases then snap them to close
together.
7.    Tighten the screws.
Auto power-off  function
This calculator automatically turns it off when not operated for
approximately 9~15 minutes.  It can be reactivated by pressing
[  ON /AC ] key and the display, memory, settings are retained.
Reset operation
If the calculator is on but you get unexpected results, press [  ON /AC ]
and then [ MODE ] four times to display the below menu. A message
appears on the display to con? rm whether you want to reset the cal-
culator and clear memory contents after pressing [ 2 ].
To clear all variables, pending operations, statistical data, answers,
all previous entries, and memory, please press [ 2 ]. To abort the
reset operation without clearing the calculator, please press [ 1 ].
If the calculator is lock and further key operations becomes impos-
sible, please use a pointed object to press the reset hole to release
the condition. It will return all settings to default settings.
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Contrast adjustment
Pressing the [ ] or [ ] following [ MODE ] key can make the con-
trast of the screen lighter or darker. Holding either key down will
make the display  become respectively lighter or darker.
Display readout
The display comprises the entry line, the result line, and indicators.
Indicator   DEG
Indicator
Entry line  74 – 8 / 7
72.85714286  Result line
Entry line  The calculator displays an entry of up to 79 digits.
Entries begin on the left ; those with more than 11 digits
scroll to the left.
Press [ ] or [ ] to move the cursor through an entry.
However, whenever you  input the 73rd digit of any
calculation, the cursor changes from “ _ ” to “ ” to
let you know memory is running  low. If you still need to
input more, you should divide your calculation into two
or more parts.
Result line  It displays a result of up to 10 digits, as well as a deci-
mal, a negative sign, a “ x10 ” indicator, and a 2-digits
positive or negative exponent.
Indicators   The following indicators appear on the display to indi-
cate you the current status of the calculator.
Indicator Meaning
M             Independent  memory
–    Result is negative
2nd   2nd set of function keys is active.
A    Alphabetic Keys (  A  ~  F  ,  M  ,  X  ~  Y  )
are active.
STORCL STO : Storing variable mode is active
RCL : Recalling variable mode is active
SD   Statistics mode is active
REG   Regression mode is active
DEGRAD Angle mode : DEGrees, GRADs, or RADs
ENG  Engineering notation.
SCI  Scienti? c notation.
FIX   Number of decimal places displayed is ? xed
HYP   Hyperbolic-trig function will be calculated
BUSY   While an operation is executing
There are digits to the left or right of
the display
There are earlier or later results that can be
displayed
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