Citizen SR-270II user manual

User manual for the device Citizen SR-270II

Device: Citizen SR-270II
Category: Calculator
Manufacturer: Citizen
Size: 0.19 MB
Added : 9/1/2014
Number of pages: 13
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Summaries

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Abstracts of contents
Summary of the content on the page No. 1

 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-
SR-270II
play become respectively lighter or darker.
Scientific Calculator
 Display readout
The display comprises the entry line, the result line, and indicators.
General Guide
Indicator DEG

Indicator
Entry line 74 – 8 ÷ 7
66. Result line
 Turning on or off
Entry line SR-270II displays an entry of up to 79 digits. Entries be

Summary of the content on the page No. 2

Each time [ MODE ] is pressed, various functions menus and all argu-  Replay function ment values corresponding to the desired mode is shown on the screen.  This function stores the latest operation executed. After execution is It includes three calculation modes (COMP, SD, REG), three angle units completed, pressing [ 2nd ] [] or [ 2nd ] [] key will display the opera- (DEG, RAD, GRAD), four display notations (FIX, SCI, NORM, ENG) tion from the beginning or the end. You can continue moving

Summary of the content on the page No. 3

10 Grad : 0 < l x l < 4.499999999 x 10  Stack however, for tan x This calculator uses memory areas, called “ stacks “, to temporarily Deg : | x | ≠ 90 (2n–1) store values (numeric stack) and commands (command stack ) accord- π Rad : | x | ≠ (2n–1) 2 ing to their precedence during calculations. The numeric stack has 10 Grad : | x | ≠ 100 (2n–1) ( n is an integer) levels and command stack has 24 levels. A stack error (Stk ERROR) 10 cos x Deg : 0 < l x l < 4.500000008 x 10 occurs wheneve

Summary of the content on the page No. 4

100 1  [ 2nd ] [ % ] divides the number in the display by 100. You can use this y > 0 : x ≠ 0, –1 x 10 < log y <100 x key sequence to calculate percentages, add-ons, discounts, and per- y = 0 : x > 0 centages ratios. See Example 9~10. y < 0 : x = 2n+1, I/n, n is an integer.(n ≠ 0) 100 1 but – 1 x 10 < log l y l <100  Display formats x This calculator has the following four display notation mode for the dis- nPr, nCr 0 < n < 99, r < n, n,r are integers. play value. 50 50 100

Summary of the content on the page No. 5

 The calculator enables you to repeat the last operation executed by  Angle units conversion pressing [ = ] key for further calculation. See Example 14. The angle units (DEG, RAD, GRAD) is set by pressing [ MODE ] to  Even if calculations are concluded with the [ = ] key, the result obtained display the angle menu. The relation among the three angle units is : can be used for further calculation. See Example 15. 180 ° = π rad = 200 grad Angle conversions ( See Example 23.) :  Answer fun

Summary of the content on the page No. 6

Y − − 2 Y ∑x [ RCL ] + [ A ] x [ 2nd ] + [ x ]  P( r, θ)  P( x, y ) ∑x [ RCL ] + [ B ] X σn [ 2nd ] + [ X σn ] r y x + y i= r (cosθ + i sinθ ) n [ RCL ] + [ C ] X σn-1 [ 2nd ] + [ X σn-1 ] θ X 0 0 x X  The calculator can perform the conversion between rectangular coor- Regression Calculation dinates and polar coordinates by [ ALPHA ] [ Pol ( ] and [ ALPHA ] [ Rec ( ]. Calculation results are automatically stored in memory vari- ☺ Use the REG mode for regression calculations. able

Summary of the content on the page No. 7

2 ∑x [ RCL ] + [ A ] x σn [ 2nd ] + [ xσn ] ∑x [ RCL ] + [ B ] x σn-1 [ 2nd ] + [ x σn-1 ] − − n [ RCL ] + [ C ] [ 2nd ] + [ ] y y 2 ∑y [ RCL ] + [ D ] y σn [ 2nd ] + [ y σn ] ∑y [ RCL ] + [ E ] y σn-1 [ 2nd ] + [ y σn-1 ] ∑xy [ RCL ] + [ F ] A [ 2nd ] + [ A ] 3 ∑x [ RCL ] + [ M ] B [ 2nd ] + [ B ] 2 ∑x y [ RCL ] + [ X ] C [ 2nd ] + [ C ] 4 ∑x [ RCL ] + [ Y ] r [ 2nd ] + [ r ] ∧ ∧ − − x [ 2nd ] + [ x ] x [ 2nd ] + [ x ] ∧ ∧ y [ 2nd ] + [ y ] The unit complies with the requi

Summary of the content on the page No. 8

DEG [] [ 2nd ] [ INS ] 1 [ = ]  14 / 10 2.3 3.22 SR-270II / SR-275 Example 4 Example [ ( 3 x 5 ) + ( 56 ÷ 7 ) – ( 74 – 8 x 7 ) ] = 5 DEG 3 [ x ] 5 [ STO ] [ M ]  M = M 15. Example 1 DEG  Change 123 x 456 as 12 x 457 56 [ ÷ ] 7 [ M+ ]  56 / 7 DEG M 123 [ x ] 456 [ = ] 8.  123 456 DEG 56088. [ 2nd ] [ RCL ] [ M ]  M = DEG [] [] [] [ DEL ] M 23.  12 456 56088. DEG 74 [ – ] 8 [ x ] 7 [ 2nd ] [ M– ]  74 – 8 7 DEG [] [] [] 7 M 18.  12 457_ 56088. DEG [ 2nd ] [ RCL ] [

Summary of the content on the page No. 9

DEG  [ 2nd ] [ Mcl ] [ = ] [ MODE ] [ MODE ] [ MODE ] 2  Mcl SCI 0 ~ 9 ? 0. DEG SCI 4 Example 6  6 / 7 –01 – 2 8.571 ( 2 + 3 ) x 10 = 0.05 X 10 DEG [ MODE ] [ MODE ] [ MODE ] [ MODE ] [ ( ] 2 [ + ] 3 [ ) ] [ x ] 1 [ EXP ] [ (–) ] 2 [ = ]  ENG RESET ( 2 + 3 )1 E –2 1 2 0.05 DEG ENG 1 Example 7  6 / 7 –03 2 + 3 x ( 5 + 4 ) = 29 857.1428571 X 10 DEG 2 [ + ] 3 [ x ] [ ( ] 5 [ + ] 4 [ = ] Example 12  2 + 3 ( 5 + 4 29. 150 m = 150000 cm = 0.15 km DEG 150 [ = ] [ EN

Summary of the content on the page No. 10

DEG [ = ] Example 21  Ans 3 81. Example 15  To calculate ÷ 6 after 3 x 4 = 12 b b DEG 4 [ a / ] 2 [ a / ] 4 [ = ] c c  DEG 4 2 4 3 [ x ] 4 [ = ] ¢} ¢}  4 1 2 3  4 ¢} ¢} 12. b DEG [ a / ] c DEG  4 2 4 [ ÷ ] 6 [ = ] ¢} ¢}  4.5 Ans / 6 2. d DEG [ 2nd ] [ / ] c  4 2 4 ¢} ¢} Example 16 9 2 ¢} 123 + 456 = 579  789 – 579 = 210 d DEG [ 2nd ] [ / ] c DEG  123 [ + ] 456 [ = ] 4 2 4 ¢} ¢} 123 + 456 4 1 2 ¢} ¢} 579. DEG 789 [ – ] [ Ans ] [ = ] Example 22  789 – Ans 210. 4 8 +3.75 =12.5

Summary of the content on the page No. 11

Example 30 [ MODE ] [ MODE ] DEG RAD GRAD    2 45 10.5 = 2.752916667 1 2 3 DEG 2 [ ] 45 [ ] 10.5 [ ] [ = ] DEG 1 [ sin ] 30 [ = ]   2 ° 45 ° 10.5 ° sin 30    2 45 10.5 0.5 DEG [ ] Example 25  2 ° 45 ° 10.5 ° 2.752916667 2 π cos ( rad ) = – 0.5 3 Example 31  If x = 5 , y = 30, what are r , θ ° Ans : r = 30.41381265 θ = 80.53767779 ° [ MODE ] [ MODE ] DEG RAD GRAD 1 2 3 , DEG [ ALPHA ] [ Pol ( ] 5 [ ] 30 [ = ]  RAD Pol (

Summary of the content on the page No. 12

SD DEG 3 [ DT ] 2 [ DT ] 5 [ DT ] 9 [ DT ] Example 35 2  [ 2nd ] [ RCL ] [ A ] ∑x 5 ! = 120 119. DEG SD DEG 5 [ 2nd ] [ x ! ] [ = ] [ 2nd ] [ RCL ] [ B ]   5 ! ∑x 120. 19. SD DEG [ 2nd ] [ RCL ] [ C ] Example 36  n =  Generates a random number between 0.000 ~0.999 4. − DEG SD DEG [ 2nd ] [ RANDOM ] [ = ] [ 2nd ] [ x ] [ = ] −   Ran # x 0.388 4.75 SD DEG [ 2nd ] [ X σn ] [ = ] Example 37  X σn 2.680951324 1 = 0.8 1.25 SD DEG [ 2nd ] [ X σn-1 ] [ = ]  X σn-1 –

Summary of the content on the page No. 13

Example 43  Find A, B, and C for the following data using quadratic regression and estimate y’ = ? for x = 58 and x’ =? for y =143 n1 2 3 x576167 y 101 117 155  [ MODE ] 3 [] Pwr Inv Quad 1 2 3 REGDEG 3 [ 2nd ] [ Scl ] [ = ]  Scl 0. , , REGDEG 57 [ ] 101 [ DT ] 61 [ ] 117 [ DT ]  , 67 [ ] 155 [ DT ] [ 2nd ] [ A ] [ = ] A M 684.3 REGDEG [ 2nd ] [ B ] [ = ]  B M 23.53333333 REGDEG [ 2nd ] [ C ] [ = ]  C M 0.233333333 ∧ REGDEG 58 [ 2nd ] [ y ] ∧ y  M 104.3 ∧ REGDEG 14


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