Construction Master IV - Calculator Calculated Industries - Free user manual and instructions
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| Type of product | Construction calculator |
| Brand | Calculated Industries |
| Model | Construction Master IV |
| Category | Calculator |
| Display | 8-digit LCD with fraction display |
| Dimensions | 5.6 x 3.1 x 0.6 inches (142 x 79 x 15 mm) |
| Weight | 3.2 oz (91 g) |
| Power source | 2 LR44 button-cell batteries |
| Auto shut-off | Yes, after approximately 8–12 minutes |
| Main functions | Feet, inch, fraction arithmetic and conversions |
| Additional functions | Area, volume, board feet, rafter and stair calculations |
| Conversion capabilities | Imperial and metric (SI) unit conversions |
| Operating temperature | 32°F to 104°F (0°C to 40°C) |
| Memory | 5 independent memory registers |
| Housing | Durable plastic body |
| Battery life | Approximately 300 hours of continuous use |
| Included accessories | Protective sleeve, user manual |
| Warranty | 1-year limited warranty |
| Cleaning | Wipe with a soft, dry cloth |
| Safety instruction | Do not immerse in water or use harsh chemicals |
| Repair policy | Factory service recommended; no user-serviceable parts |
| Spare parts availability | Replacement batteries are available; other spare parts via service center |
| Target users | Builders, contractors, architects, and construction professionals |
Frequently Asked Questions - Construction Master IV Calculated Industries
How do I switch between feet and inches on the Construction Master IV?
Use the Feet and Inch keys to input values. For fractional inches, press the Fraction key after the whole number to enter the numerator and denominator.
How can I clear an entry or reset the calculator?
Press the On/C key once to clear the last entry, or press it twice to clear the entire calculation and reset the display to zero.
Can I perform metric conversions with this calculator?
Yes. Press the Conv key followed by the desired unit key (for example, Conv then Feet) to convert between imperial and metric units such as meters, centimeters, and millimeters.
What type of battery does the Construction Master IV use?
It uses two LR44 button-cell batteries. These are common and widely available in most electronics or hardware stores.
How do I replace the battery?
Unscrew the small screw on the back cover, slide the cover off, gently remove the old batteries, and insert new LR44 batteries with the positive side facing up. Replace the cover and screw.
How do I calculate area and volume?
For area, multiply length by width using the Length and Width keys, then press Area. For volume, multiply length, width, and height using Height and press Volume.
Is there a warranty on the Construction Master IV?
Yes, Calculated Industries provides a 1-year limited warranty covering defects in materials and workmanship under normal use.
How do I subtract fractional measurements?
Simply enter the first fractional value, press the minus key, enter the second value, and the calculator will automatically handle the fraction arithmetic and display the result in reduced fractional form.
What should I do if the display is dim or the calculator becomes unresponsive?
This usually indicates low battery. Replace both batteries with fresh LR44 batteries. If the problem persists, contact Calculated Industries technical support for further assistance.
Can I use this calculator for rafter and stair calculations?
Absolutely. The Construction Master IV includes dedicated functions for rafter length, stair calculations, and right-angle problems. Refer to the user manual for step-by-step procedures using these functions.
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USER MANUAL Construction Master IV Calculated Industries
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Product information
Brand : Calculated Industries
Model : Construction Master IV
Category : Calculator