6
—
S
HEET
M
ETAL/
HVAC
P
RO
C
ALC
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.
÷ =
Ç +
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
