1. Introduction
This manual provides detailed instructions for the safe and effective use of your LOMVUM Digital Laser Distance Meter M40-50M. Please read this manual thoroughly before operating the device and keep it for future reference.
The LOMVUM M40-50M is a precision laser measurement tool designed for accurate distance, area, and volume calculations. It features a backlit LCD, electronic angle sensor, and multiple measurement modes including Pythagorean calculations.
Figure 1: Front and back view of the LOMVUM Digital Laser Distance Meter M40-50M. The front features the display and control buttons, while the back shows product information and laser warning labels.
2. Safety Information
Laser Class: Class II
Laser Type: 630-670nm, <1mW
- Do not stare directly into the laser beam.
- Avoid pointing the laser beam at people or animals.
- Do not disassemble the device; laser radiation exposure may occur.
- Keep the device out of reach of children.
- Use only as described in this manual.
3. Package Contents
- LOMVUM Laser Measuring Device (M40-50M)
- 2 AAA Batteries
- Package Box
- Hand Strap
- User Manual (this document)
4. Setup
4.1. Installing Batteries
- Locate the battery compartment cover on the back of the device.
- Slide or unclip the cover to open.
- Insert two AAA alkaline batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2. Powering On/Off
- To power on, press the Power button (usually marked with a circle and a vertical line).
- To power off, press and hold the Power button for a few seconds. The device will also automatically power off after a period of inactivity to conserve battery.
4.3. Unit Selection
The device supports measurement units in Meters (M), Inches (In), and Feet (Ft).
- With the device powered on, press the UNIT button (or similar, refer to device buttons) to cycle through the available units. The selected unit will be displayed on the LCD.
4.4. Setting Reference Point
The measurement reference point can be set to the front, rear, or end of the device. This determines where the measurement starts from.
Figure 2: Illustration of back and front reference points. The top image shows the device using its back as the reference, while the bottom image shows the device using its front as the reference for measurement.
- Press the Reference button (or similar icon) to switch between the front, rear, or end reference points. The active reference point is indicated on the LCD.
5. Operating Instructions
5.1. Single Distance Measurement
- Point the laser at the target.
- Press the MEASURE button (usually the main button in the center) once to activate the laser.
- Press the MEASURE button again to take the measurement. The distance will be displayed on the LCD.
5.2. Continuous Measurement (Tracking)
- Enter continuous measurement mode (often by pressing the MODE button and then selecting the mode, or a dedicated button).
- Move the device slowly towards or away from the target. The display will update in real-time, showing the current distance, as well as minimum and maximum values.
- Press the MEASURE button again to exit continuous measurement.
5.3. Area Measurement
Figure 3: Display illustrating different measurement modes: Distance, Area, Volume, and Pythagoras. The Area Measurement icon shows a rectangle being measured.
- Select the Area Measurement mode (usually by pressing the MODE button until the area icon appears).
- Measure the first side (e.g., length) by pressing the MEASURE button.
- Measure the second side (e.g., width) by pressing the MEASURE button again.
- The device will automatically calculate and display the area.
5.4. Volume Measurement
Figure 4: The device display showing measurements for length, width, and height (a, b, c) to calculate the volume of a room. An example calculation is shown below the device.
- Select the Volume Measurement mode (usually by pressing the MODE button until the volume icon appears).
- Measure the length by pressing the MEASURE button.
- Measure the width by pressing the MEASURE button.
- Measure the height by pressing the MEASURE button.
- The device will automatically calculate and display the volume.
5.5. Pythagorean Measurement
Figure 5: An illustration of Pythagorean measurement, showing how the device calculates an unknown side (x) of a right-angled triangle based on two measured sides (a and b).
- Select the Pythagorean Measurement mode (usually by pressing the MODE button until the Pythagorean icon appears).
- Follow the on-screen prompts to measure the required sides of the triangle. For example, for a single Pythagorean mode, you might measure the hypotenuse and one leg to calculate the other leg.
- The device will automatically calculate and display the unknown distance.
5.6. Data Storage
Figure 6: The device display showing multiple stored measurements, indicating its data storage capability for convenient review.
The device can store up to 20 groups of measurements. Refer to the device's specific buttons (e.g., SAVE/RECALL button) to save current measurements or recall previously stored data.
5.7. Mute Setting
Figure 7: A user holding the LOMVUM Laser Distance Meter in a quiet environment like a library, highlighting the utility of the mute function for discreet operation.
The mute setting allows you to turn the measurement beep sound on or off. This is useful for operating in quiet environments such as libraries or offices.
- Press the MUTE button (or similar icon) to toggle the sound on or off.
5.8. Electronic Angle Sensor
The integrated electronic angle sensor helps in finding the horizontal direction and improves the accuracy of vertical bevel measurements. The angle will be displayed on the LCD.
Figure 8: The device features two bubble levels, visible on the display, which assist in achieving accurate horizontal alignment for measurements.
6. Maintenance
6.1. Cleaning
- Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the laser lens is clean and free of dust for accurate measurements. Use a soft, lint-free cloth.
6.2. Storage
- Store the device in a cool, dry place when not in use.
- Avoid prolonged exposure to strong sunlight, as this can weaken laser energy and affect accuracy.
- Remove batteries if the device will not be used for an extended period to prevent leakage.
6.3. Water and Dust Resistance
The LOMVUM M40-50M has an IP54 rating, meaning it is protected against dust ingress and splashing water from any direction. While it offers protection, avoid submerging the device in water.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Batteries are dead or incorrectly inserted. | Replace batteries with new AAA alkaline batteries, ensuring correct polarity. |
| Inaccurate measurements in bright conditions. | Strong sunlight weakens laser energy. | Avoid using in direct strong sunlight. Use in shaded areas or when light is weak. |
| Laser beam is not visible. | Environmental conditions (bright light) or dirty lens. | Move to a less bright area. Clean the laser lens with a soft, lint-free cloth. |
| Measurement error displayed. | Target surface is too reflective, too transparent, or too far/close. | Ensure target surface is opaque and within the measuring range (0.1 to 393 feet). Try measuring to a different surface. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | M40-50M |
| Laser Class | Class II |
| Laser Type | 630-670nm, <1mW |
| Measuring Range | 0.1 to 393 feet (approx. 0.03 to 120 meters) |
| Accuracy | ±1/16 inch |
| Measurement Units | Meters (M), Inches (In), Feet (Ft) |
| IP Rating | IP54 (Dust-proof, Splash-proof) |
| Material | Acrylonitrile Butadiene Styrene |
| Batteries | 2 x AAA Alkaline Batteries |
| Internal Memory | 20 groups of measurements |
| Item Weight | 132 g |
| Item Dimensions (LxWxH) | 10.8 x 5 x 2.4 Centimeters |
9. Warranty and Support
LOMVUM provides the following for your Digital Laser Distance Meter M40-50M:
- 90-Day Return/Refund Guarantee: For any issues within 90 days of purchase.
- 2-Year Warranty: Covers manufacturing defects for two years from the date of purchase.
- Lifetime Support: Ongoing technical assistance and customer service from Lomvum.
For warranty claims, technical support, or any inquiries, please refer to the official Lomvum website or contact their customer service department using the contact information provided with your purchase or on their official channels.