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Citizen SR-270II manual

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Table of contents for the manual

  • Page 1

    1 General Guide  T urning on or off T o turn the calculator on, press [ ON / AC ] ; T o turn the calculator of f, press [ OFF ].  Battery replacement SR-270 II is powered by two alkaline batteries (GP76A). If the display becomes di m a nd difficult to rea d, the batteries should be repla ced a s soon a s possible. T o repla ce batteries : 1) [...]

  • Page 2

    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 a ngle units (DEG, RAD, GRAD), four display notations (FIX, SCI, NORM, ENG) and reset function (RESET). Entering an argument value ca n set up this c[...]

  • Page 3

    3  Stack This calculator uses memory area s, called “ stacks “, to t emporarily store values (numeric stack) and commands (command stack ) accord- ing to their precedence during calculations. The numeric sta ck ha s 10 levels and comma nd stack ha s 24 levels. A sta ck error (Stk ERROR) occurs whenever you try to perform a calculation that i[...]

  • Page 4

    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 , y σ n , x , y , A, B, r : n ≠ 0 x σ[...]

  • Page 5

    5 • The calculator enables you to repeat the la st operation executed by pressing [ = ] key for further calculation. See Exa mple 14. • Even if calculations are concluded with the [ = ] key , the result obtained can be used f or further calculation. See Exa mple 15.  Answer function • Answer function stores the most recently calculated res[...]

  • Page 6

    6 x + y i= r (cos θ + i sin θ ) • The calculator can perform the conversion between rectangular coor- dinates and polar coordinates by [ ALPHA ] [ Pol ( ] and [ ALPHA ] [ Rec ( ]. Calculation results are automatically stored in memory vari- ables E a nd F . See Exa mple 31~32. (Note) :When using those key , ma ke sure the calculator is set f or[...]

  • Page 7

    7 ∑ x 2 [ RCL ] + [ A ] x σ n [ 2nd ] + [ x σ n ] ∑ x [ RCL ] + [ B ] x σ n-1 [ 2nd ] + [ x σ n-1 ] n [ RCL ] + [ C ] − y [ 2nd ] + [ − y ] ∑ y 2 [ RCL ] + [ D ] y σ n [ 2nd ] + [ y σ n ] ∑ y [ RCL ] + [ E ] y σ n-1 [ 2nd ] + [ y σ n-1 ] ∑ xy [ RCL ] + [ F ] A [ 2nd ] + [ A ] ∑ x 3 [ RCL ] + [ M ] B [ 2nd ] + [ B ] ∑ x 2 y[...]

  • Page 8

    1 Exa mple 1  Change 123 x 456 as 12 x 457 123 [ x ] 456 [ = ] DEG 123  456  56088. [  ] [  ] [  ] [ DEL ] DEG 12  456  56088. [  ] [  ] [  ] 7 DEG 12  457_  56088. [ = ] DEG 12  457  5484. Exa mple 2  After executing 1+ 2, 3 + 4, 5 + 6, use replay function to recall 1 [ + ] 2 [ = ] 3 [ + ] 4 [ = ] 5 [...]

  • Page 9

    2  [ 2nd ] [ Mcl ] [ = ] DEG Mcl  0. Exa mple 6 ( 2 + 3 ) x 10 – 2 = 0.05 [ ( ] 2 [ + ] 3 [ ) ] [ x ] 1 [ EXP ] [ (–) ] 2 [ = ] DEG ( 2 + 3 )  1 E –2  0.05 Exa mple 7 2 + 3 x ( 5 + 4 ) = 29 2 [ + ] 3 [ x ] [ ( ] 5 [ + ] 4 [ = ] DEG 2 + 3  ( 5 + 4  29. Exa mple 8 2 x { 7 + 6 x ( 5 + 4 ) } = 122 2 [ x ] [ ( ] 7 [ + ] 6 [ x ] [[...]

  • Page 10

    3 [ = ] DEG Ans  3  81. Exa mple 15  T o calculate ÷ 6 after 3 x 4 = 12 3 [ x ] 4 [ = ] DEG 3  4  12. [ ÷ ] 6 [ = ] DEG Ans / 6  2. Exa mple 16 123 + 456 = 579  789 – 579 = 210 123 [ + ] 456 [ = ] DEG 123 + 456 579. 789 [ – ] [ Ans ] [ = ] DEG 789 – Ans  210. Exa mple 17 ln7 + log100 =3.945910149 [ ln ] 7 [ + ] [ log[...]

  • Page 11

    4 [ MODE ] [ MODE ] DEG RAD GRAD 1 2 3 1 [ sin ] 30 [ = ] DEG sin 30  0.5 Exa mple 25 cos ( 3 2 π rad ) = – 0.5 [ MODE ] [ MODE ] DEG RAD GRAD 1 2 3 2 [ cos ] [ ( ] 2 [ 2nd ] [ π ] [ ÷ ] 3 [ = ] RAD cos ( 2 π / 3  – 0.5 Exa mple 26 sin -1 0.5 = 30 Deg. [ MODE ] [ MODE ] DEG RAD GRAD 1 2 3 1 [ 2nd ] [ sin –1 ] 0.5 [ = ] DEG sin –1 [...]

  • Page 12

    5 Exa mple 35 5 ! = 120 5 [ 2nd ] [ x ! ] [ = ] DEG 5 !  120. Exa mple 36  Generates a random number between 0.000 ~0.999 [ 2nd ] [ RANDOM ] [ = ] DEG Ran #  0.388 Exa mple 37 = 0.8 1.25 [ x – 1 ] [ = ] DEG 1.25 –1  0.8 Exa mple 38 13 9 125 21 4 2 5 3 2 3 = + + + + 5 [ 2nd ] [ x 3 ] [ + ] 2 [ x 2 ] [ + ] [ ] DEG  [ ( ] 4 [ + ] 21[...]

  • Page 13

    6 Exa mple 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 x 5 76 16 7 y 101 1 17 155 [ MODE ] 3 [  ] Pwr Inv Quad 1 2 3 3 [ 2nd ] [ Scl ] [ = ] REGDEG Scl  0. 57 [ , ] 101 [ DT ] 61 [ , ] 1 17 [ DT ] REGDEG 67 [ , ] 155 [ DT ] [ 2nd ] [ A ] [ = ] A  M[...]