Before Starting Calculation; Using " Mode " Keys; Using " 2Nd " Keys; Corrections - Citizen SR-281 User Manual

Before Starting Calculation

Using " MODE " keys

Press [ MODE ] to display mode menus when specifying an operating
mode ( " 1 MAIN ", " 2 STAT ", " 3 CPLX ", " 4 RESET " ) or the
engineering symbol notation ( " 5 ENG " ).
1 MAIN : Use this mode for basic calculations, including scientific
calculations and Base–n calculations.
2 STAT : Use this mode to perform single–variable and
paired–variable statistical calculations and regression
calculations.
3 CPLX : Use this mode to perform complex number calculation.
4 RESET : Use this mode to perform reset operation.
5 ENG : Use this mode to allow engineering calculations utilizing
engineering symbol.
Give " 2 STAT " as an example :
Method 1 : Press [ MODE ] and then scroll through the menus using
[
then enter the desired mode by pressing [
Method 2 : Press [ MODE ] and then key in directly the number of the
mode, [ 2 ] , to enter the desired mode immediately.

Using " 2nd " Keys

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.

Corrections

If you have made a mistake when entering a number (but you have not
yet pressed an arithmetic operator key), just press [ CE ] to clear the
last entry then input it again, or delete individual digits by the
backspace key [
After making corrections, input of the formula is complete, the answer
can be obtained by pressing [
clear the immediate results completely (except clearing memory). If
you press the wrong arithmetic operation key, just press the correct
key to replace it.

Undo function

The unit offers an undo function which allows you to undo some of the
errors you just have made.
] or [ 2nd ] [
], or clear all entry by [ ON/C ].
] until " 2 STAT " is underlined,
]. You can also press [ ON/C ] to
-E4-
].