User manual CITIZEN SR-270N

[. . . ] Pressing the [ ] or [ ] following [ MODE ] key can make the contrast of the screen lighter or darker. Holding either key down will make the display become respectively lighter or darker. The display comprises the entry line, the result line, and indicators. Entries begin on the left ; those with more than 11 digits scroll to the left. [. . . ] Type A functions which are required entering values before pressing the function key, for example, x 2, , x !6) Type B functions which are required pressing the function key before entering, for example, sin, cos, tan, sin ­1, cos ­1, tan ­1, sinh, cosh, tanh, sinh ­1, cosh ­1, tanh ­1, log, ln, 10 X , e X, , , ( ­ ). When functions with the same priority are used in series, execution is performed from right to left. E X ln120 e X { ln (120 ) } otherwise, execution is from left to right. Anything contained within parentheses receives the highest priority. Numbers used as input must be within the range of the given function as follow : Functions sin x, tan x Input range Deg0| x | 4. Error message will appear on the display and further calculation becomes impossible when any of the following conditions occur. For negative values, press [ (­) ] before entering the value; You can enter a number in mantissa and exponent form by [ EXP ] key. Arithmetic operations are performed by pressing the keys in the same sequence as in the expression. The calculator can use up to 15 levels of consecutive parentheses in a single calculation. You can use this key sequence to calculate percentages, add-ons, discounts, and percentages ratios. This calculator has the following four display notation mode for the display value. However, values that exceed this limit are automatically displayed in exponential format. There are two types of exponential display formats : Norm 1 mode : 10 ­2 > | x | , | x | 10 10 Norm 2 mode : 10 ­9 > | x | , | x | 10 10 (Note) :All of the examples in this manual show calculation results using the Norm 1 mode. Engineering Notation : ( ENG ) Calculation result is displayed using engineering notation, where the mantissa of the value is displayed with the number of decimal places specified and the exponent is set to a multiple of 3 for display. Fixed Notation : ( FIX ) Calculation result is displayed with the number of decimal places specified. Scientific Notation : ( SCI ) Calculation result is displayed using scientific notation, where the mantissa of the value is displayed with the number of decimal places specified. For FIX, SCI notation, the number of decimal places can be set to any value between 0~9. [. . . ] Always make sure you clear statistical memory by [ 2nd ] [ Scl ] before preforming standard deviation calculation. Individual data can be input using [ DT ] ; To delete data you just input, please press [ 2nd ] [ CL ]. For example, to input the data 15 seven times, press 15 [ 2nd ] [ ] 7 [ DT ]. Press [ MODE ] 3 to enter the REG menu and then choose one of the six regression types by pressing the corresponding argument value, as follow : Lin Log Exp 12 3 Lin Log Exp Pwr Inv Quad Always make sure you clear statistical memory by [ 2nd ] [ Scl ] before preforming regression calculation. [. . . ]