Basic operation keys, Key definitions – Calculated Industries 4090 User Manual
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BASIC OPERATION KEYS
o
On/Clear — Turns power on. Pressing once clears the
display. Pressing twice clears all temporary values.
O
Turns all power off, clearing all non-permanent registers.
+ – x
Arithmetic operation keys.
ч =
З +
Percent (%) — Four-function percent. See page 30
for examples.
0 – 9 and • Keys used for entering digits.
B
Backspace Key — Used to delete entries one key-
stroke at a time (unlike the
o function, which
deletes the entire entry).
CONVERT
Ç KEY —
UNIT CONVERSIONS and SECOND FUNCTIONS
The
Ç key is to convert between measurement units or to access
second functions, listed below:
Ç
Convert — Used with the measurement keys to
convert between units or with other keys to access
special functions.
Ç x
Clear All — Clears all values, including Memory.
Resets all permanent entries to default values
(except Preference Settings, which are retained).
Note: Use only when necessary, as it deletes all stored values.
X
Squares the value in the display. For example, to
Square the value ten, enter
1 0 then press X.
Ç X
x
3
— Cubes the value in the display. For example, to
Cube the value ten, enter
1 0 then press ÇX.
√
Square Root Function — Used to find the Square
Root of a non-dimensional or area value
(e.g.,
1 0 0 √ = 10).
KEY DEFINITIONS