User manual CITIZEN SR-281

[. . . ] SR-281 / SR-282 Scientific Calculator General Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Turning on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Battery replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Auto power-off function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] [ ( 3 x 5 ) + ( 56 0[X M] 7 ) + ( 74 ­ 8 x 7 ) ] = 41 DEG 0. 3 [ x ] 5 [ M+ ] 56 [ [ ­ ] 8 [ x ] 7 [ M+ ] ] 7 [ M+ ] 74 74­8 DEG 7 M+ 18. DEG M [ MR ] M M 0[X M] DEG 41. 0. (Note) : Besides pressing [ STO ] or [ X M ] key to store a value, you can also assign values to memory variable M by [ M+ ]. However, when [ STO ] [ M ] or [ X M ] is used, previous memory contents stored in variable M are cleared and replaced it with the newly assigned value. When [ M+ ] is used, values is added to present sum in memory. Order of operations Each calculation is performed in the following order of precedence: -E6- 1) 2) 3) 4) Fractions Expression inside parentheses. Coordinates transformation ( P R , R P ) Type A functions which are required entering values before 2 pressing the function key, for example, x , 1/x, , x!, %, RND, ENG, , , x ', y ' . x, y X 5) 6) Type B functions which are required pressing the function key ­1 ­1 ­1 before entering, for example, sin, cos, tan, sin , cos , tan , ­1 ­1 ­1 sinh, cosh, tanh, sinh , cosh , tanh , log, ln, FRAC, INT, , X X 3 , 10 , e , NOT, EXP, DATA in STAT mode. You attempted to divide by 0 When allowable input range of function calculations exceeds the range specified 3) When result of function calculations exceeds the range specified 4) When the [ ( ] key is used more than 13 levels in a single expression 5) When USL < LSL value To release the above errors, please press [ ON/C ]. 1) 2) Basic Calculations Use MAIN ( [ MODE ] 1 ( MAIN ) ) mode for basic calculations. -E9- Arithmetic calculation Arithmetic operations are performed by pressing the keys in the same sequence as in the expression. 7 + 5 x 4 = 27 7[+]5[x]4[ ] 7+5 DEG 4= 27. For negative values, press [ +/­ ] after entering the value; You can enter a number in mantissa and exponent form by [ EXP ] key. 2. 75 x 10 ­5 = 0. 0000275 ] DEG 2. 75 [ EXP ] 5 [ +/­ ] [ 2 . 75E­05= 0. 0 0 0 0 2 7 5 Results greater than 10 exponential form. 12 or less than 10 ­11 are displayed in 12369 x 7532 x 74103 = 6903680612720 12 = 6. 90368061272 x 10 12369 [ x ] 7532 [ x ] 74103 [ ] DEG 12369 7532 7 12 6. 9 0 3 6 8 0 6 1 2 7 2 Parentheses calculations Operations inside parentheses are always executed first. SR-281 / SR-282 can use up to 13 levels of consecutive parentheses in a single calculation. Closed parentheses occurring immediately before operation of the [ ) ] key may be omitted, no matter how many are required. 2 x { 7 + 6 x ( 5 + 4 ) } = 122 2[(]7[+]6[(]5[+]4[ ] 2 DEG ( 7+6 ( 5+4= 122. (Note) : A multiplication sign " x " occurring immediately before an open parenthesis can be omitted. The correct result cannot be derived by entering [ ( ] 2 [ + ] 3 [ ) ] [ EXP ] 2. Be sure to enter [ x ] between the [ ) ] and [ EXP ] in the below example. -E10- ( 2 + 3 ) x 10 = 500 [ ( ] 2 [ + ] 3 [ ) ] [ x ] [ EXP ] 2 [ ] DEG 2 (2+3) 1E02= 50 0. Percentage calculation [ 2nd ] [ % ] divides the number in the display by 100. You can use this key sequence to calculate percentages, add-ons, discounts, and percentage ratios. 120 x 30 % = 36 120 [ x ] 30 [ 2nd ] [ % ] [ ] 120 DEG 3 0%= 36. 88 88 [ 55 % = 160 ] 55 [ 2nd ] [ % ] [ ] 88 DEG 5 5%= 160. Display notations The calculator has the following display notations for the display value. Fixed-point / Floating Notations To specify the number of decimal places, press [ 2nd ] [ TAB ] and then a value indicating the number of places ( 0~9 ). To return floating setting, press [ 2nd ] [ TAB ] [ · ]. Scientific Notation To change the display mode between floating and scientific notation, press [ FE ]. Engineering Notation Pressing [ ENG ] or [ 2nd ] [ ] will cause the exponent display for the number being displayed to change in multiples of 3. 6 6[ 7 = 0. 85714285714. . . ]7[ ] 6 7= DEG 0. 8 5 7 1 4 2 8 5 7 1 4 [ 2nd ] [ TAB ] 4 6 7= 0. 8 5 7 1 DEG TAB -E11- [ 2nd ] [ TAB ] 2 6 7= DEG TAB 0. 8 6 [ 2nd ] [ TAB ] [ · ] 6 7= DEG 0. 8 5 7 1 4 2 8 5 7 1 4 [ FE ] 6 7= DEG 8. 5 7 1 4 2 8 5 7 1 4 3 [ ENG ] DEG ­03 857. 1 4 2 8 5 7 1 4 3 [ 2nd ] [ ] [ 2nd ] [ ] DEG 03 0. 0 0 0 8 5 7 1 4 2 8 5 Engineering Symbol Notation Each time you specify the ENG mode, a displayed result is automatically shown with the corresponding engineering symbol. yotta 24 21 18 15 12 Y = 10 , Z = 10 , E = 10 , P = 10 , T = 10 , G = 10 6 3 ­3 ­6 M = 10 , K = 10 , m = 10 , µ = 10 , ­9 zetta exa peta tera giga 9 mega , kilo milli micro nano n = 10 , p = 10 ­ 21 z = 10 , pico ­ 12 , femto f = 10 ­ 15 , atto ­ 18 a = 10 , zepto yocto ­ 24 y = 10 Perform the following operation to specify engineering symbol notation. [ MODE ] 5 ( ENG ) To exit from this mode, press [ MODE ] 5 once again. [. . . ] The complement is the result of subtracting that number from 10000000000 in that number's base by pressing [ NEG ] key in non-decimal bases. 3/A 16 = NEG IFIFIFIFIFIFIC6 16 [ 2nd ] [ HEX ] 3 A [ NEG ] NEG DEG HEX h 3 /A F F FFFFC6 h Logical operation Logical operations are performed through logical products (AND), negative logical (NAND), logical sums (OR), exclusive logical sums (XOR), negation (NOT), and negation of exclusive logical sums (XNOR). 1010 2 AND ( /A 16 OR 7 16 ) = 12 8 [ 2nd ] [ BIN ] 1010 [ AND ] [ ( ] [ 2nd ] [ HEX ] A [ OR ] 7 [ ) ] [ ] [ 2nd ] [ OCT ] DEG BIN b 1 0 1 0 AND ( h 00000000012 o Statistical Calculations Use STAT ( [ MODE ] 2 ( STAT ) ) mode for statistical calculations. The calculators can perform both single­variable calculations and paired­variable in this mode. statistical Press [ MODE ] 2 ( STAT ) to enter STAT mode. There are six items in STAT mode, asking you to select one of them, DEG STAT 1­VAR LIN LOG [ ][ ][ ] DEG STAT EXP PWR D­CL Single­variable statistics 1­VAR Single­variable statistics Paired-variable / Regression statistics -E27- LIN LOG EXP POW D­CL Linear Regression Logarithmic Regression Exponential Regression Power Regression Clear all statistical data y=a+bx y = a + b lnx bx y=a·e b y=a·x Entering data Always make sure you clear statistical data by D­CL before performing statistical calculations. [. . . ]