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Summary of Contents for Calculated Industries 4090
- Page 2 /HVAC P HEET ETAL The Sheet Metal/HVAC Pro Calc calculator helps you save time and prevent costly errors! Quickly Solve: • Feet-Inches-Fractions, Metric Dimensional Problems and Conversions • Problems Involving All Fractions — 1/2-1/64ths! • Trigonometry Keys • Law of Cosines •...
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Page 3: Table Of Contents
TABLE OF CONTENTS KEY DEFINITIONS........4 Dimension Keys........4 Miscellaneous Functions .....4 Trig. Keys..........5 Pythagorean Theorem Keys ....6 Law of Cosines Keys ......6 Offset Keys ..........7 Fan Law Keys........7 Velocity Pressure/FPM Keys ....8 Circle/Arc Keys ........9 Column/Cone Key......10 Right Triangle/Roof Framing Keys..10 Stair Layout Key ........11 EXAMPLES ...........13 Adding and Subtracting Strings of... - Page 4 Volume of a Cylinder ......16 Cubed Function .........17 Cubed Root........17 Scientific Notation ......17 Converting D:M:S ......18 Finding Sine, Cosine, Tangent...18 Finding ArcSin, ArcCos, ArcTan..19 Using Trigonometry to Find Unknown Side .......19 Offset Basic Example ......20 Law of Cosines/Triangle Area....21 Fan Law 1..........22 Fan Law 2..........23 Fan Law 3..........24 Converting Velocity Pressure ....25...
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Page 5: Key Definitions
KEY DEFINITIONS Dimension Keys Meters Ç m Millimeters Feet Inch Fraction Bar Miscellaneous Functions Backspace Key Ç x Clear All Ç ÷ (1/x) Reciprocal Ç – (+/–) Toggle Ç + (%) Percent Ç = Pref. Settings (see large User’s Guide for details) Ç... -
Page 6: Trig. Keys
√ Square root Ç √ Cube root Ç / Exponent (x10 µ (M+) Memory + Ç µ (M–) Memory – ® ® Recall and Clear M+ Ç 1 (M1) Storage Register M1 Ç 2 (M2) Storage Register M2 Ç 3 (M3) Storage Register M3 ®... -
Page 7: Pythagorean Theorem Keys
Ç t Arctangent (tan ) — Gives the angle for the tangent value Pythagorean Theorem Keys Enters or calculates “x” or the horizontal leg of a right triangle Enters or calculates “y” or the vertical leg of a right triangle Enters or calculates “r”... -
Page 8: Offset Keys
Offset Keys Ç ( Calculates offset measure- ments including: center- line radius, wrapper length/stretch-out, heel radius, throat radius and theta, given below entries Enters the actual length “x” Enters the offset “y” Ç 4 Enters length of “end a” Fan Law Keys Ç... -
Page 9: Velocity Pressure/Fpm Keys
Ç d Fan Law 3 — Calculates the missing variable (e.g., “a-new” or “b-new”, for CFM new or BHP new) for Fan Law 3 STORAGE REGISTERS USED FOR FAN LAWS: Ç 4 Enters “a-old” or current “a” value Ç 7 Enters “a-new”... -
Page 10: Circle/Arc Keys
(Cont’d) Press Result Calculates Metric velocity (MPS) – assumes entry is Calculates Metric velocity pressure (kPA) – assumes entry is MPS Circle/Arc Keys Circle — Calculates cir- cumference and circle area Ç p Radius — Enters or calcu- lates circle radius Ç... -
Page 11: Column/Cone Key
Column/Cone Key Ç ) Column/Cone — Calculates volume and surface area of column or cone upon consecutive presses of ) following Ç Right Triangle/Roof Framing Keys p (Theta) Enters/calculates the pitch/slope (amount of “Rise” over 12” of “Run”) R (Run) Enters or calculates the horizontal leg of a right triangle... -
Page 12: Stair Layout Key
Calculates Jack rafter lengths on the regular- pitched roof side Ç j Calculates Jack rafter lengths on the irregular- pitched roof side Stair Layout Key Given rise and/or run and stored* variables, calcu- lates or displays: Press Result Riser Height Number of Risers Riser Overage/ Underage... - Page 13 (Cont’d) Press Result Stored Riser Height* Stored Tread Width* Stored Headroom Height* Stored Floor Thickness* STAIR DEFAULT (STORED) VALUES • 7-1/2” Desired Riser Height • 10” Desired Tread Width • 10” Floor Thickness (used in calculation of Stairwell Opening) • 6’8” Headroom Height *Note: See large User’s Guide for details on Customizable Stair Settings.
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Page 14: Examples
EXAMPLES Note: This pocket guide is limited due to space; see large User’s Guide for more examples and details on calculator features. Adding and Subtracting Strings of Dimensions Add the following measurements: • 6 feet 2-1/2 inches • 18.25 inches •... -
Page 15: Converting Feet-Inches To Decimal Feet
Converting Feet-Inches to Decimal Feet Convert 5’ 7-1/2” to decimal feet, then deci- mal inches (also, convert to fractional inches): KEYSTROKE DISPLAY 5 f 7 i 1 / 2 5 7-1/2 FEET INCH Ç f 5.625 FEET 67.5 INCH 67-1/2 INCH Converting Feet-Inches to Meters and Millimeters... -
Page 16: Circle Circumference And Area
Circle Circumference and Area Find the circumference and area of a circle with a diameter of 25 inches: KEYSTROKE DISPLAY 2 5 i C DIA 25 INCH CIRC 78-9/16 INCH AREA 490.8739 SQ INCH Rectangular Area and Volume Find the area and volume: •... -
Page 17: Area Of A Triangle
Area of a Triangle Find the area of a triangle if its base is 45” and altitude/height is 30”: KEYSTROKE DISPLAY 4 5 i ÷ 2 = 22-1/2 INCH x 3 0 i = 675. SQ INCH Volume of a Cylinder Find the volume of a cylinder with a diameter of 2 feet 4 inches and a height of 4 feet 6 inches:... -
Page 18: Cubed Function
Cubed Function What is 50 KEYSTROKE DISPLAY 5 0 Ç X 125000. Cubed Root What are the three dimensions of a cube with a volume of 2028 in KEYSTROKE DISPLAY 2 0 2 8 Ç √ 12.65773 ( INCH Scientific Notation Add 1.78x10 and 3.90x10 KEYSTROKE... -
Page 19: Converting D:m:s
Converting D:M:S Convert 23°42’39” to decimal degrees: KEYSTROKE DISPLAY 2 3 • 4 2 • 3 9 DMS 23.42.39 Ç • 23.71083° Finding Sine, Cosine, Tangent Find Sin 12°, Cos 33° and Tan 75°: KEYSTROKE DISPLAY 1 2 S 0.207912 3 3 ç... -
Page 20: Finding Arcsin, Arccos, Arctan
Finding ArcSin, ArcCos, ArcTan Find angle A if Sin A=0.57544, Cos A=0.06753 and Tan A=0.87421; round to the nearest whole angle: KEYSTROKE DISPLAY • 5 7 5 4 4 Ç S 35.13045° (35°) • 0 6 7 5 3 Ç ç 86.12787°... -
Page 21: Offset Basic Example
Offset Basic Example If an offset is 5 feet, the actual length 10 feet, and the height of the “end A” equal to 7 feet, calculate all offset values: KEYSTROKE DISPLAY 1. Enter actual length as “x”: 1 0 f R X 10 FEET INCH... -
Page 22: Law Of Cosines/Triangle Area
Law of Cosines/Triangle Area Using Sides a, b and c, find the corre- sponding angles A, B and C: --Side a: 38 feet 5 inches --Side b: 23 feet 4-9/16 inches --Side c: 26 feet 1-13/16 inches KEYSTROKE DISPLAY 1. Enter side a, b and c: 3 8 f 5 i Ç... -
Page 23: Fan Law 1
Fan Law 1 A 1,250 CFM fan is running at 750 RPM, but it needs to supply 1,400 CFM. What is the RPM required? KEYSTROKE DISPLAY 1. Enter current CFM into “a” old: 1 2 5 0 Ç 4 A STORED 1250. 2. -
Page 24: Fan Law 2
Fan Law 2 A fan is producing 15,300 CFM at 3.2” SP. If the fan is adjusted to 14,000 CFM, what will the new SP be? KEYSTROKE DISPLAY 1. Enter current CFM into “a” old: 1 5 3 0 0 Ç 4 A STORED 15300. -
Page 25: Fan Law 3
Fan Law 3 A fan is running at 15,800 CFM using 6.3 BHP. If the CFM is increased to 20,000 CFM, what is the new BHP? KEYSTROKE DISPLAY 1. Enter current CFM into “a” old: 1 5 8 0 0 Ç 4 A STORED 15800. -
Page 26: Converting Velocity Pressure
Converting Velocity Pressure After obtaining velocity pressures (VPs) from taking a traverse, convert the follow- ing to feet per minute (FPM): 0.049” 0.123” 0.027” KEYSTROKE DISPLAY • 0 4 9 Ç 0* FPM 886.5445 • 1 2 3 Ç 0 FPM 1404.608 •... -
Page 27: Converting Fpm
Converting FPM Calculate the velocity pressure if the feet per minute (FPM) is 500: KEYSTROKE DISPLAY Enter 500 FPM to calculate velocity pressure (VP): 5 0 0 Ç 0 0* VP 0.015586 *The VP FPM function begins with the last displayed value. -
Page 28: Right Angle/Framing
RIGHT ANGLE/FRAMING Degree of Pitch If the degree of pitch is 30.45°, what is the percent grade, slope and pitch in inches? KEYSTROKE DISPLAY 3 0 • 4 5 p <Ø 30.45° %GRD 58.78702 SLP 0.58787 PTCH 7-1/16 INCH Note: To convert Pitch in Inches: Simply enter the pitch in inches first (e.g., 7 i p ), then continuously press the p key to calculate the pitch conversions, as above. -
Page 29: Angle And Hypotenuse
Angle and Hypotenuse Find the diagonal (hypotenuse) and degree of angle of a right triangle that is 9 feet high and 12 feet long: KEYSTROKE DISPLAY 1. Enter rise and run: 9 f r FEET INCH 1 2 f R X 12 FEET INCH... -
Page 30: Common Rafter Length
Common Rafter Length Find the point-to-point length of the com- mon rafter on a 7/12-pitched roof with a span of 28 feet. What are the angle cuts? KEYSTROKE DISPLAY 1. Enter pitch: 7 i p PTCH 7 INCH 2. Enter half the span as the run: 2 8 f ÷... -
Page 31: Regular Hip/Valley And Jacks
Regular Hip/Valley and Jacks A roof’s pitch is 9/12 and half the total span is 6 feet. Find the lengths of the Common, Hip/Valley and Jack rafters. Also find the cut angles: Note: Jack rafters are set at 16” on-center spac- ing;... -
Page 32: Irregular Hip/Valley
(Cont’d) KEYSTROKE DISPLAY JK 5 0 FEET INCH PLMB 36.87°* LEVL 53.13°* CHK1 45.° *Angle answers are rounded. Irregular Hip/Valley A roof has a 9/12 pitch, an irregular pitch of 8/12, and half the span is 6 feet 7 inch- es. -
Page 33: Stairs
STAIRS Stairs — Given Rise and Run You’re going to build a stairway that has a floor-to-floor height of 10 feet 1 inch, a run of 12 feet 5 inches, and a desired riser height of 7-1/2 inches (default). Find the following: riser height, number of risers, riser overage/underage (if any), tread width, number of treads, tread over-... -
Page 34: Appendix
(Cont’d) KEYSTROKE DISPLAY T+/– 0-1/16 INCH OPEN 9 10-1/4 FEET INCH STRG 15 7-5/16 FEET INCH INCL 37.27136° APPENDIX Preference Settings See large User’s Guide for details. Battery and Warranty Information See large User’s Guide for details. • Your calculator uses Two (2) LR44 batteries. - Page 35 Class B computing device, pursuant to Subpart J of Part 15 of FCC rules. Pocket Reference Guide copyrighted by Calculated Industries, Inc. © 2021. Calculated Industries® is a registered trademark of Calculated Industries, Inc. ALL RIGHTS RESERVED CALCULATED INDUSTRIES®...
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