Calculated Industries 4090 - Manual (Page 3)

2 — ITI S
HEET
M
ETAL
/HVAC P
RO
KEY DEFINITIONS ............................................................................6
BASIC OPERATION KEYS .............................................................6
CONVERT
Ç KEY—UNIT CONVERSIONS and
SECOND FUNCTIONS................................................................6
MEMORY and STORAGE FUNCTIONS ........................................7
RECALL
® KEY ..........................................................................8
FEET-INCH-FRACTION and METRIC KEYS .................................8
TRIGONOMETRIC KEYS ...............................................................9
PYTHAGOREAN THEOREM/RIGHT TRIANGLE KEYS ..............10
LAW OF COSINES/NON-90 DEGREE TRIANGLE KEYS ...........12
OFFSET KEYS..............................................................................13
FAN LAW KEYS ............................................................................14
VELOCITY PRESSURE/FPM KEYS ............................................15
CIRCULAR/ARC FUNCTION KEYS .............................................15
COLUMN/CONE KEY ...................................................................16
HIP/VALLEY and JACK RAFTER KEYS.......................................17
STAIR KEY....................................................................................19
GETTING STARTED........................................................................21
ORDER OF OPERATIONS ...........................................................21
USING PARENTHESES ...............................................................22
SETTING FRACTIONAL RESOLUTION.......................................23
Setting Fraction Resolution to Other Than 16ths —
Using the Preference Setting Mode .......................................23
Setting Fixed/Constant Fractional Resolution............................24
ENTERING DIMENSIONS ............................................................25
Entering Linear Dimensions.......................................................25
Entering Square/Cubic Dimensions ...........................................25
CONVERSIONS (LINEAR, AREA, VOLUME) ..............................27
Linear Conversions ....................................................................27
Converting Feet-Inch-Fractions to Decimal Feet .......................27
Converting Decimal Feet to Feet-Inch-Fractions .......................27
Converting Fractional Inches to Decimal Inches .......................27
Converting Decimal Inches to Fractional Inches .......................28
Square Conversions ..................................................................28
Cubic Conversions .....................................................................28
PERFORMING BASIC MATH WITH DIMENSIONS....................29
Adding Dimensions ....................................................................29
Subtracting Dimensions .............................................................29
Multiplying Dimensions ..............................................................29
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