Calculated Industries 4090 - Manual (Page 34)

U
SER
’
S
G
UIDE
— 33
The ITI Sheet Metal/HVAC Pro calculator has keys and functions
labeled in common sheet metal/HVAC or construction terms. Just
follow the examples and adapt the keystrokes to your specific appli-
cation.
Your calculator will save you time; you don’t need to remember com-
mon formulas, as they are built into timesaving keys.
The first examples that follow provide you with mathematical problems
seen in the sheet metal industry, such as computing triangle meas-
urements using the Pythagorean Theorem or the Law of Cosines, as
well as dedicated Offset, Fan Law, and Velocity functions.
The remaining examples apply to the construction trades, especially
roof framing, which also depends on Right Triangle mathematics.
It is good practice to clear your calculator (press o twice) before
beginning each problem. And remember to use the Backspace
(
B) key to correct entries one entry at a time.
EXAMPLES — USING THE SHEET METAL/HVAC PRO