1. Introduction
The Huepar LM100A Laser Rangefinder is a high-precision digital laser distance meter designed for accurate measurements in various applications, from home renovations to professional construction. This device offers multiple measurement modes, including single distance, continuous, area, volume, Pythagorean, and angle measurements. Equipped with a backlit LCD and a durable IP54-rated design, it ensures reliable performance in diverse working conditions. This manual provides detailed instructions for safe and effective use of your laser rangefinder.
2. Product Overview
2.1 Package Contents
- 1 x Huepar LM100A Laser Distance Meter
- 1 x User Manual
- 1 x Hand Strap
- 1 x USB Cable (for charging)
2.2 Device Layout and Buttons
Familiarize yourself with the device's components and controls:
- Laser Indication: Emits the laser beam for measurement.
- LCD Display: Backlit screen showing measurements, modes, battery status, and other information.
- '+' Button (Addition): Used for adding measurements.
- '-' Button (Subtraction/Sound): Used for subtracting measurements and toggling sound.
- 'READ' Button (Turn on/Measuring): Powers on the device and initiates measurements.
- 'Save' Button: Stores current measurement data.
- 'OFF/CLEAR' Button (Turn off/Remove): Powers off the device or clears current data.
- 'U' Button (Reference Point/Unit Switch): Changes the measurement reference point (front/middle/rear) and switches measurement units (M/In/Ft).
- Mode Button (Length/Area/Volume/Pythagorean Measuring): Cycles through different measurement modes.
3. Specifications
| Feature | Specification |
|---|---|
| Model Number | LM100A |
| Laser Class | Class 2 (IEC/EN60825-1/2014), output power <1mW |
| Special Features | Electronic Angle Sensor |
| Power Source | 3.7V 850mAh Li-ion Battery (Rechargeable) |
| Battery Included | Yes |
| Measurement Accuracy | ±2mm (±1/16 inch) |
| Angle Range | ±90° |
| Working Range | Up to 100M (330Ft) |
| Max Storage | 30 units |
| Display Style | Backlit LCD |
| Measuring Units | Meters (M), Inches (In), Feet (Ft) |
| Laser Type | 635nm |
| Automatic Laser Cut-off | 20 seconds |
| Automatic Shutdown | 150 seconds |
| Dimensions | 112 x 50 x 25mm |
| Tripod Mount | 1/4"-20 Thread |
| Recharge Method | USB Charging |
| IP Rating | IP54 (Water, Dust, and Shock Resistant) |
| Battery Life (single measurement) | Up to 8000 times |
| Battery Charge Cycles | 500 |
4. Setup
4.1 Charging the Battery
The Huepar LM100A is powered by a built-in 3.7V 850mAh Li-ion battery. Before first use, ensure the device is fully charged.
- Connect the provided USB cable to the charging port on the device.
- Connect the other end of the USB cable to a standard USB power adapter (not included) or a computer USB port.
- The battery indicator on the LCD will show charging status. A full charge provides power for up to 8000 single measurements.
4.2 Powering On/Off
- To power on: Press the READ button.
- To power off: Press and hold the OFF/CLEAR button for a few seconds. The device will also automatically shut down after 150 seconds of inactivity.
4.3 Tripod Mounting
For enhanced stability and precision, especially over longer distances or for angle measurements, the device can be mounted on a tripod using its 1/4"-20 threaded mount.
5. Operating Instructions
5.1 Basic Distance Measurement
- Power on the device by pressing READ.
- Aim the laser at the target point.
- Press READ again to take a single measurement. The distance will be displayed on the LCD.
5.2 Continuous Measurement (Tracking)
This mode displays the maximum and minimum distances in real-time as you move the device.
- Power on the device.
- Press and hold the READ button until the continuous measurement icon appears on the display.
- Move the device slowly towards or away from the target. The MAX and MIN values will update in real-time.
- Press READ again to stop continuous measurement.
5.3 Area, Volume, and Pythagorean Measurement
Press the Mode button repeatedly to cycle through different measurement functions:
- Area Measurement: Measure two sides (length and width), and the device calculates the area.
- Volume Measurement: Measure three sides (length, width, height), and the device calculates the volume.
- Pythagorean Measurement: Used for indirect measurements, such as height, by measuring hypotenuses and one side.
5.4 Angle Measurement
The built-in electronic angular sensor allows for precise angle measurements up to ±90°.
- Enter the angle measurement mode (if not automatically displayed).
- Place the device on a surface or against an object to measure its angle relative to the horizontal.
- The angle will be displayed on the screen.
5.5 Addition and Subtraction of Measurements
You can add or subtract consecutive measurements:
- Take the first measurement.
- Press the + button for addition or - button for subtraction.
- Take the second measurement. The result will be displayed.
5.6 Unit Switching and Reference Points
Press the U button to:
- Switch between measurement units: Meters (M), Inches (In), Feet (Ft).
- Change the measurement reference point: Front (from the top of the device), Middle (from the tripod mount), or Rear (from the bottom of the device).
5.7 Memory Function
The device can store up to 30 groups of measurement data. Use the Save button to store current readings and navigate through stored data.
5.8 Mute Setting
To adjust the volume or mute the device, press the - button. This is useful for quiet environments.
5.9 Video Demonstration
6. Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents. Ensure the laser lens is clean for accurate measurements.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: Recharge the Li-ion battery regularly, even if the device is not in frequent use, to maintain battery health. Avoid fully discharging the battery for extended periods.
- Protection: The device has an IP54 rating, making it resistant to dust and splashing water. However, avoid submerging it in water or exposing it to heavy rain.
7. Troubleshooting
If you encounter issues with your Huepar LM100A, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low battery or device malfunction. | Charge the battery fully. If the issue persists, contact support. |
| Inaccurate measurements | Dirty laser lens, incorrect reference point, or unsuitable measuring conditions (e.g., highly reflective surfaces, strong sunlight). | Clean the laser lens. Ensure the correct reference point is selected. Use a target plate in challenging conditions. |
| Laser beam not visible | Strong ambient light or laser cut-off. | Use in lower light conditions or use a target plate. The laser automatically cuts off after 20 seconds of inactivity. |
| Device shuts down unexpectedly | Automatic shutdown due to inactivity or low battery. | Charge the battery. The device automatically shuts down after 150 seconds of inactivity to save power. |
8. User Tips
- For best accuracy, especially over long distances, ensure the device is stable. Using a tripod (via the 1/4"-20 mount) is highly recommended.
- Always select the correct reference point (front, middle, or rear) based on your measurement needs to avoid errors.
- In bright outdoor conditions or when measuring to highly reflective/non-reflective surfaces, using a target plate can significantly improve measurement accuracy and range.
- Keep the laser lens clean to prevent inaccurate readings.
- Utilize the continuous measurement mode for quickly finding maximum and minimum distances, which is useful for diagonal measurements or fitting objects.
9. Safety Information
WARNING: LASER RADIATION
- This product is a Class 2 laser device (IEC/EN60825-1/2014) with an output power of <1mW.
- Do NOT stare directly into the laser beam.
- Do NOT aim the laser beam at people or animals.
- Do NOT look into the laser beam with optical instruments (e.g., binoculars, telescopes).
- Keep the device out of reach of children.
- Use the device only as described in this manual. Any other use may result in hazardous laser radiation exposure.
- Do not attempt to modify or disassemble the device.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact Huepar customer service through the official channels provided at the time of purchase. Please have your product model (LM100A) and purchase details ready when contacting support.
