Citizen SR-270II - Manual
Citizen SR-270II – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – II; Independent memory
- Page 3 – Functions
- Page 4 – B as i c C a l c u l a t i o n; Use the COMP mode for basic calculations.
- Page 5 – S c i e n t i f i c C a l c u l a t i o n; Use the COMP mode for scientific calculations.
- Page 6 – Probability; S t a n d a r d D e v i a t i o n C a l c u l a t i o n; Use the SD mode for standard deviation; R e g r e s s i o n C a l c u l a t i o n; Use the REG mode for regression calculations.
- Page 8 – Example; Example 4
- Page 9 – Example 6
- Page 13 – PRINTED IN CHINA
1
General Guide
Turning on or off
To turn the calculator on, press [
ON
/
AC
] ; To turn the calculator off, press
[ OFF ].
Battery replacement
SR-270
II
is powered by two alkaline batteries (GP76A). If the display
becomes dim and difficult to read, the batteries should be replaced as
soon as possible.
To replace batteries :
1)
Remove the screws and the back cover.
2)
Replace the old batteries and install new ones with polarity in
correct directions, then secure the screws in place and press
[
ON
/
AC
] to turn the power on.
Auto power-off function
This calculator automatically turns it off when not operated for approxi-
mately 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 confirm whether you want to reset the calculator and
clear memory contents after pressing [ 2 ].
2
1
RESET
ENG
→
]
2
[
2
1
Y
N
:
RESET
To clear all variables, pending operations, statistical data, answers, all
previous entries, and memory, please press [ 2 ]. To abort the reset op-
eration without clearing the calculator, please press [ 1 ].
If the calculator is lock and further key operations becomes impossible,
please press [ 0 ] [
ON
/
AC
] at the same time to release the condition. It will
return all settings to default settings.
SR-270
II
Scientific Calculator
Contrast adjustment
Pressing the [
] or [
] following [ MODE ] key can make the contrast of
the screen lighter or darker. Holding either key down will make the dis-
play become respectively lighter or darker.
Display readout
The display comprises the entry line, the result line, and indicators.
Entry line
SR-270
II
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. How-
ever, 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 decimal,
a negative sign, a “ x10 ” indicator, and a 2-digits
positive or negative exponent.
Indicators The following indicators appear on the display to indicate
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.
S T O R C L
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
E N G
Engineering notation.
S C I
Scientific notation.
FIX
Number of decimal places displayed is fixed
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
B e f o r e s t a r t i n g c a l c u l a t i o n
Mode Selection
D E G
74 – 8 ÷ 7
6 6 .
Indicator
Entry line
R e s u l t l i n e
Indicator
"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.
Summary
2 Each time [ MODE ] is pressed, various functions menus and all argu-ment values corresponding to the desired mode is shown on the screen.It includes three calculation modes (COMP, SD, REG), three angle units(DEG, RAD, GRAD), four display notations (FIX, SCI, NORM, ENG)and reset function (RESET). E...
3 Stack This calculator uses memory areas, called “ stacks “, to temporarilystore values (numeric stack) and commands (command stack ) accord-ing to their precedence during calculations. The numeric stack has 10levels and command stack has 24 levels. A stack error (Stk ERROR)occurs whenever you try ...
4 y > 0 : x ≠ 0, –1 x 10 100 < 1 x log y < 100 y = 0 : x > 0 y < 0 : x = 2n+1, I/n, n is an integer.(n ≠ 0) but – 1 x 10 100 < 1 x log l y l < 100 nPr, nCr 0 < n < 99, r < n, n,r are integers. SD l x l < 1x10 50 , l y l < 1x10 50 , l n l < 1x10 100 (REG) x σ n ...
