User manual CITIZEN SR-275

[. . . ] SR270ll / SR-275 Scientific Calculator GENERAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 TURNING ON OR OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 BATTERY REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 AUTO POWER-OFF FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Enter [ 2 ] to let this calculator being operated under standard deviation mode. COMP SD REG 1 23 [ 2] SD 0. Using "2nd" keys To execute the functions marked in yellow, please press [ 2nd ] and then the corresponding key. When you press [ 2nd ], the "2nd" indicator shown in the display is to tell you that you will be selecting the second function of the next key you press. If you press [ 2nd ] by mistake, simply press [ 2nd ] again to remove the "2nd" indicator. Cursor Pressing [ ] or [ ] key can move the cursor to the left or the right. Pressing [ 2nd ] [ ] or [ 2nd ] [ ] can scroll the display up or down while there are previous entries hidden the display. You can reuse or edit a previous entry when it is on the entry line. Making corrections during input To delete a character at the cursor, make the character underlined by using [ ] or [ ] to move the cursor, and then press [ DEL ] to delete the character. To replace a character, make the character underlined by using [ ] or [ ] to move the cursor, and then enter a new entry to replace the character. To insert a character, move the cursor to the position of the character where you want to insert, it will be inserted in the front of the character after pressing [ 2nd ] [ INS ] and entering a new character. (Note) : The blinking cursor " " means the calculator is in insert mode On the contrary, the blinking cursor is displayed as "_" and it means the calculator is in overwrite mode. To clear all characters, clear all input character by [ ON/AC ] key. -E4- Replay function · This function stores the latest operation executed. After execution is completed, pressing [ 2nd ] [ ] or [ 2nd ] [ ] key will display the operation from the beginning or the end. · The replay function can keep input digits up to 256 characters for SR-270ll / SR-275. After execution is completed or during entering, you can press either [2nd ] [ ] or [ 2nd ] [ ] to display previous input steps and edit values or commands for subsequent execution. (Note) : The replay function isn't cleared even when [ ON/AC ] is pressed or power is turned off, so contents can be recalled even after [ ON/AC ] is pressed. Error position display function · When a mathematically illegal calculation is performed, error position display function will tell you with the cursor where the error is. You can also clear an error by pressing [ ON/AC ] and then reentered the values and expression from the beginning. See Example 3. Memory calculation Independent memory · Press [ M+ ] to add a result to running memory. (Note) : Besides pressing [ STO ] key to store a value, you can also assign values to memory variable M by [ M+ ] or [M­]. Memory variable · The calculator has nine memory variables for repeated use : A, B, C, D, E, F, M, X, Y. * [ 2nd ] [ Mcl ] [ = ] clears all variables. -E5- Stack This calculator uses memory areas, called "stacks", to temporarily store values (numeric stack) and commands (command stack) according to their precedence during calculations. A stack error (Stk ERROR) occurs whenever you try to perform a calculation that is so complex that the capacity of a stack is exceeded. Order of operations Each calculation is performed in the following order of precedence : 1) Coordinates transformation. 2) Type A functions which are required entering values before pressing the function key, for example, x2, , x !, x ­1. 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, 10X , eX, 3 , (­). 7) Abbreviated multiplication format in front of Type B functions 2 3 , Alog2, etc. [. . . ] Change the default angle settings to the units you want to convert to. D 1 R 2 G 3 The units you can select are D(degrees), R(radians), G(Gradians). functions · SR-270ll / SR-275 provides standard trigonometric functions and inverse trigonometric functions - sin, cos, tan, sin­1, cos­1 and tan­ 1 . (Note) : When using those keys, make sure the calculator is set for the angle unit you want. Hyperbolic / Inverse-Hyp. [. . . ]