Instruction/ maintenance manual of the product SR-270II Citizen
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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.
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).
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.
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.
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.
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 .
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 .
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.
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.
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.
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 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.
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.
An important point after buying a device Citizen SR-270II (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Citizen SR-270II yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Citizen SR-270II - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Citizen SR-270II you will learn all the available features of the product, as well as information on its operation. The information that you get Citizen SR-270II will certainly help you make a decision on the purchase.
If you already are a holder of Citizen SR-270II, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Citizen SR-270II.
However, one of the most important roles played by the user manual is to help in solving problems with Citizen SR-270II. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Citizen SR-270II along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
