1. Product Overview
The Ogeto LM120 is a digital laser distance meter designed for precise measurement of distances, areas, and volumes. It features an electronic angle sensor, multiple measurement modes, and data storage capabilities, making it suitable for various applications in renovation and construction.
Figure 1: Front view of the Ogeto LM120 Laser Distance Meter.
2. Safety Instructions
Please read and understand all safety instructions before using the device. Failure to follow these instructions may result in laser radiation exposure, electric shock, fire, or serious injury.
- Laser Radiation: This device emits Class 2 laser radiation. Do not stare directly into the laser beam or direct it at other people.
- Eye Protection: Avoid direct eye exposure to the laser beam.
- Children: Keep the device out of reach of children.
- Environment: Do not operate the device in explosive atmospheres or near flammable liquids and gases.
- Maintenance: Only qualified personnel should repair the device.
3. Setup
3.1 Battery Installation
The Ogeto LM120 requires two AAA 1.5V alkaline batteries. Ensure correct polarity when inserting the batteries.
- Open the battery compartment cover located on the rear of the device.
- Insert two AAA batteries according to the polarity indicators (+/-).
- Close the battery compartment cover securely.
3.2 Initial Power On and Unit Selection
After installing batteries, press the MEAS/ON button to power on the device. The default unit of measurement can be changed as follows:
- Press and hold the UNIT button to cycle through available units: meters (m), feet (ft), inches (in), and feet+inches (ft+in). Release the button when the desired unit is displayed.
Figure 2: Unit conversion display on the Ogeto LM120.
3.3 Setting the Measurement Benchmark
The device can measure from its front edge or its rear edge. This is important for accurate measurements depending on your reference point.
- The benchmark setting is typically indicated by an icon on the display (e.g., a line at the front or rear of a device icon).
- Refer to the on-screen icon to confirm the current benchmark.
Figure 3: Illustration of measurement benchmark settings.
4. Operating Instructions
The Ogeto LM120 features a clear backlit LCD and intuitive buttons for various functions.
Figure 4: Ogeto LM120 button layout and their primary functions.
4.1 Basic Distance Measurement
- Point the laser at the target surface.
- Press the MEAS/ON button once. The measurement result will appear on the display.
4.2 Continuous Measurement (Tracking)
This mode allows for dynamic measurement, displaying the current distance as the device is moved.
- From standby, press and hold the MEAS/ON button.
- Move the device to track distances. The display will update in real-time.
- Press MEAS/ON again to stop continuous measurement.
4.3 Area and Volume Measurement
The device can calculate area (length x width) and volume (length x width x height).
- Area: Enter area mode (refer to manual for specific button sequence). Measure length, then width. The device will calculate and display the area.
- Volume: Enter volume mode. Measure length, width, then height. The device will calculate and display the volume.
4.4 Pythagorean Measurement
This function allows indirect measurement of heights or distances using the Pythagorean theorem.
- Select the desired Pythagorean mode (e.g., two-point or three-point measurement).
- Follow the on-screen prompts to take the required measurements (e.g., hypotenuse, base). The device will calculate the unknown side.
4.5 Electronic Angle Sensor
The integrated electronic angle sensor displays the tilt angle in real-time, aiding in precise alignment and indirect measurements.
Figure 5: Digital angle display on the Ogeto LM120.
4.6 Add/Subtract Function
Measurements can be added to or subtracted from previous results.
- After a measurement, press the +/- button to select addition or subtraction.
- Take the next measurement. The result will be automatically added or subtracted.
4.7 Data Storage
The device can store up to 99 sets of measurement data.
Figure 6: Display showing multiple stored data records.
- To access stored data, long press the Function key (often labeled with a folder icon).
- Use the arrow buttons (if available) to navigate through the stored records.
4.8 Power Off / Clear
- Press the OFF/CLR button to clear the current measurement or exit a menu.
- Press and hold the OFF/CLR button to power off the device. The device also features an automatic power-off function after a period of inactivity to conserve battery life.
5. Maintenance
5.1 Cleaning
- Clean the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Regularly clean the laser emission and reception lenses with a soft, lint-free cloth to ensure measurement accuracy.
5.2 Storage
- Store the device in a dry, cool place, away from direct sunlight and extreme temperatures.
- Remove batteries if the device will not be used for an extended period to prevent leakage.
5.3 Battery Replacement
Replace batteries when the low battery indicator appears on the display. Refer to section 3.1 for battery installation instructions.
6. Troubleshooting
If you encounter issues with your Ogeto LM120, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Dead or incorrectly installed batteries | Replace batteries or ensure correct polarity. |
| Inaccurate measurements | Dirty lenses, incorrect benchmark, unstable surface, strong light interference | Clean lenses, verify benchmark setting, ensure stable measurement, avoid strong light or use a target plate. |
| Laser beam is weak or invisible | Bright ambient light, long distance measurement | Use in lower light conditions, use a reflective target plate for longer distances. |
| Buttons unresponsive | Device frozen, low battery | Remove and reinsert batteries to reset. Replace batteries if low. |
7. Specifications
| Feature | Specification |
|---|---|
| Model | LM120 |
| Measurement Range | Up to 120 meters |
| Accuracy | ±2 mm |
| Measurement Units | m / ft / in / ft+in |
| Measurement Time | Approximately 0.3 seconds |
| Laser Class | Class 2 |
| Data Storage | 99 sets |
| Battery Type | 2 x AAA 1.5V Alkaline batteries |
| Automatic Power Off | Yes (after inactivity) |
| Dimensions (L x W x H) | 10 x 4 x 3 cm |
| Weight | 100 grams |
| Material | Plastic |
| Water Resistance | Waterproof |
8. Warranty and Support
8.1 Warranty Information
Ogeto products are typically covered by a limited warranty against defects in materials and workmanship. Please refer to the warranty card included with your product or contact Ogeto customer support for specific warranty terms and conditions applicable to your region.
8.2 Customer Support
For technical assistance, troubleshooting, or service inquiries, please contact Ogeto customer support through the contact information provided on the official Ogeto website or your purchase documentation.