1. Introduction
The LASELION LT50 Laser Distance Meter is a high-precision measuring tool designed for various applications, from home renovations to professional surveying. It offers a maximum range of 50 meters (165 feet) and includes multiple measurement modes such as area, volume, continuous measurement, and Pythagorean theorem. Equipped with a built-in level bubble and a mute function, the LT50 provides accurate, reliable, and convenient measurements.
This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your LT50 Laser Distance Meter to ensure optimal performance and longevity.
Figure 1: Front view of the LASELION LT50 Laser Distance Meter, displaying its screen and control buttons.
2. Safety Information
Please read and understand all safety instructions before using the device. Failure to follow these instructions may result in laser exposure, electric shock, fire, or serious injury.
- Laser Classification: This device is a Class II laser product with a power output of <1mW.
- Eye Safety: Do not stare directly into the laser beam. Avoid direct eye exposure to the laser.
- Children: Keep the device out of reach of children.
- Repairs: Do not attempt to disassemble or modify the device. Repairs should only be performed by authorized service personnel.
- Environment: Do not operate the device in explosive atmospheres or near flammable liquids and gases.
3. Package Contents
Verify that all items are present in the package:
- 1 x LASELION LT50 Laser Distance Meter
- 2 x AAA Batteries (1.5V)
- 1 x User Manual (Multi-language)
- 1 x Carrying Pouch
- 1 x Wrist Strap
Figure 2: All components included in the LASELION LT50 Laser Distance Meter package.
4. Product Overview
Familiarize yourself with the LT50's components and display.
Figure 3: Detailed overview of the LT50's display and button functions.
4.1. Buttons and Functions
- Measure Button (Red Triangle): Activates the laser, initiates single measurement, or confirms selection.
- Menu Button: Enters the menu for advanced settings and measurement modes.
- Addition / Subtraction Button (+/-): Adds or subtracts measurements.
- Continuous Measurement Button: Activates continuous measurement mode.
- Clear / Mute Button (C/M): Clears the current measurement, returns to the previous screen, or toggles mute function (long press).
- Reference Point / Unit Button (Unit): Switches between front and rear reference points (short press) or changes measurement units (long press).
- Memory Button: Accesses stored measurement data.
- Power ON / OFF Button: Turns the device on or off.
4.2. Display Icons
- Laser On Icon: Indicates the laser is active.
- Memory Icon: Shows when memory is being accessed.
- Battery Status Icon: Displays current battery level.
- Reference Point: Indicates whether the front or rear of the device is the measurement reference.
- Continuous Measurement Icon: Appears in continuous measurement mode.
- Pythagoras Measuring Mode Indication Symbol: Indicates Pythagorean mode.
- Area & Volumes Measuring Mode Indication Symbol: Indicates area or volume measurement mode.
- Memory Location Number Row: Shows the current memory slot.
- Value Rows (1, 2, 3): Display measurement results, max/min values, or intermediate calculations.
- Latest Value / Summary Line / Calculation Result: Displays the final measurement or calculation.
5. Setup
5.1. Battery Installation
- Locate the battery compartment cover on the back of the device.
- Slide the cover open.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
6. Operating Instructions
6.1. Power On/Off
- To Power On: Press the Power ON / OFF button.
- To Power Off: Press and hold the Power ON / OFF button for a few seconds, or the device will automatically shut off after 180 seconds of inactivity to save battery.
6.2. Basic Measurement (Single Distance)
- Turn on the device.
- Point the laser at the target.
- Press the Measure button once to activate the laser.
- Press the Measure button again to take the measurement. The result will appear on the main display line.
6.3. Continuous Measurement (Min/Max Tracking)
This mode allows you to track minimum and maximum distances as you move the device.
- Press the Continuous Measurement button.
- Move the device slowly towards or away from the target. The display will continuously update the current, minimum, and maximum distances.
- Press the Measure button or Clear button to exit this mode.
Figure 4: Continuous measurement mode displaying real-time, minimum, and maximum values.
6.4. Area Measurement
- Press the Menu button until the area measurement icon (rectangle) appears.
- Measure the first side (e.g., length) by pointing the laser and pressing Measure.
- Measure the second side (e.g., width) by pointing the laser and pressing Measure.
- The device will automatically calculate and display the area.
6.5. Volume Measurement
- Press the Menu button until the volume measurement icon (cube) appears.
- Measure the length, then the width, then the height, pressing Measure after each dimension.
- The device will automatically calculate and display the volume.
6.6. Pythagorean Measurement
This mode allows indirect measurement of heights or distances using the Pythagorean theorem.
- Press the Menu button until the Pythagorean measurement icon appears (triangle).
- Follow the on-screen prompts to measure the required sides (e.g., hypotenuse and one leg for height).
- The device will calculate and display the unknown side.
Figure 5: Illustration of the LT50's comprehensive measurement functions.
6.7. Unit Conversion
The LT50 supports conversion between metric (m) and imperial (ft/in) units.
- To Change Units: Long press the Unit button. The units will cycle through m, ft, in, and ft+in.
Figure 6: Examples of unit conversion on the LT50 display.
6.8. Reference Point Selection
You can choose to measure from the front or the rear of the device.
- To Switch Reference Point: Short press the Unit button. An icon on the display will indicate the active reference point.
Figure 7: The LT50 features dual bubble levels for enhanced accuracy and allows selection of front or back reference points.
6.9. Mute Function
To operate the device silently, you can mute the key tone.
- To Mute/Unmute: Long press the C/M button. A speaker icon with a cross will appear on the display when muted.
Figure 8: The mute function allows for silent operation, indicated by a crossed-out speaker icon.
6.10. Automatic Storage
The LT50 automatically stores up to 100 data sets. When the memory is full, the latest measurement will overwrite the oldest record.
- To Access Memory: Press the Memory button. Use the arrow buttons (if available, or re-press Memory button) to navigate through stored data.
Figure 9: The LT50 automatically stores up to 100 measurement data sets.
7. Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents. Clean the laser lens gently with a soft cloth, similar to cleaning camera lenses.
- Storage: Store the device in its carrying pouch in a cool, dry place when not in use. Remove batteries if storing for extended periods to prevent leakage.
- Battery Care: Replace batteries when the low battery indicator appears on the display. Dispose of used batteries responsibly.
- Durability: The LT50 is IP54 rated, providing splash-proof and dust-proof protection. However, avoid submerging the device in water or exposing it to heavy rain.
Figure 10: The LT50 is designed with IP54 splash-proof and dust-proof features for various environments.
8. Troubleshooting
If you encounter issues with your LT50, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Low or dead batteries; Incorrect battery polarity | Replace batteries; Check battery orientation |
| Inaccurate measurements | Unstable surface; Obstruction in laser path; Dirty lens; Measuring beyond range | Ensure stable measurement; Clear laser path; Clean lens; Measure within specified range |
| "Error" message on display | Measurement error (e.g., no target, too far/close) | Reposition device, ensure clear target, measure within range |
| Buttons unresponsive | Device frozen; Low battery | Remove and reinsert batteries; Replace batteries |
9. Specifications
| Feature | Specification |
|---|---|
| Model | LT50 |
| Measuring Range | 0.05m - 50m (0.16ft - 165ft) |
| Accuracy | ±2mm (±1/16 inch) |
| Measurement Speed | 0.5 seconds |
| Laser Class | Class II |
| Laser Type | 635nm, <1mW |
| Automatic Shut-off (Laser) | 30 seconds |
| Automatic Shut-off (Device) | 180 seconds |
| Memory Storage | Up to 100 data sets |
| Units of Measurement | m / ft / in / ft+in |
| Reference Points | Front / Rear |
| Battery Type | 2 x 1.5V AAA Alkaline Batteries |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
| IP Rating | IP54 (Dustproof & Splash-proof) |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 100 Grams (3.53 ounces) |
| Dimensions | Approx. 14.9 x 9.5 x 4.7 cm (5.87 x 3.74 x 1.85 inches) |
10. Warranty Information
The LASELION LT50 Laser Distance Meter comes with a 1-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper maintenance.
Please retain your proof of purchase for warranty claims.
11. Customer Support
For technical assistance, warranty claims, or any questions regarding your LASELION LT50 Laser Distance Meter, please refer to the contact information provided with your purchase or visit the official LASELION website for support resources.
