1. Important Safety Information
Please read all instructions carefully before using the device. Failure to follow these safety instructions may result in laser radiation exposure, electric shock, fire, or serious injury.
1.1 Laser Safety
- This device emits Class II laser radiation. Do not stare directly into the laser beam.
- Do not aim the laser beam at people or animals.
- Avoid direct eye exposure to the laser beam.
- Do not disassemble the device. Repairs should only be performed by authorized service personnel.
- Keep the device out of reach of children.
1.2 Battery Safety
- Use only the specified battery type (2 x 1.5V AAA alkaline batteries).
- Do not mix old and new batteries, or different types of batteries.
- Insert batteries with correct polarity.
- Remove batteries if the device will not be used for an extended period.
- Dispose of used batteries properly according to local regulations.
1.3 General Safety
- Do not operate the device in explosive environments, such as in the presence of flammable liquids, gases, or dust.
- Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
- The device is IP54 rated for dust and splash protection, but it is not fully waterproof. Do not immerse it in water.

Image: Excerpt from the multi-language safety instructions provided with the Kiprim LD50E, highlighting general and battery safety.
2. Product Overview
The Kiprim LD50E is a compact and accurate laser distance measure designed for various measurement tasks. It features a large backlit LCD display, multiple measurement functions, and a durable, ergonomic design.

Image: The Kiprim LD50E Laser Distance Measure shown with its accessories, including AAA batteries, a carrying bag, and a wrist strap.
2.1 Device Components

Image: A detailed view of the Kiprim LD50E, labeling its large backlit screen, two bubble levels, and control buttons for various functions like 'READ' (Turn on/Measuring), 'Area/Volume/Pythagorean Mode/Save', 'Reference Point/Unit Switch', 'Addition & Subtraction/Sound', and 'OFF/CLEAR' (Turn off/Remove).
- Laser Emitter/Receiver: Located at the top of the device.
- LCD Display: Large, backlit screen for clear readings.
- Control Buttons: For various functions and settings.
- Bubble Levels: Two integrated bubble levels for horizontal and vertical alignment.
- Battery Compartment: Located at the rear for AAA batteries.
3. Getting Started
3.1 Battery Installation
- Open the battery compartment cover on the back of the device.
- Insert two 1.5V AAA alkaline batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
3.2 Power On/Off
- Power On: Press the READ button to turn on the device and activate the laser.
- Power Off: Press and hold the OFF/CLEAR button for 2 seconds to turn off the device. The device will automatically shut down after 150 seconds of inactivity to conserve power.
4. Basic Operation
4.1 Single Distance Measurement
- Point the laser at the target surface.
- Press the READ button once. The measurement will be displayed on the screen.
4.2 Changing Measurement Reference Point
The device can measure from its front edge or its rear edge. Short press the U button to switch between the front and rear reference points. An icon on the display will indicate the current reference point.
4.3 Switching Units
Long press the U button to cycle through measurement units: meters (m), inches (in), feet (ft), and feet+inches (ft+in).

Image: The Kiprim LD50E display illustrating how to change the measurement reference point (from front or rear of the device) and how to switch between different units of measurement (meters, inches, feet, and feet+inches).
5. Measurement Functions
The Kiprim LD50E offers multiple measurement modes for various applications.

Image: Visual representation of the various measurement modes available on the Kiprim LD50E, including single distance, continuous, area, volume, and different Pythagorean methods.
5.1 Mode Selection
Press the Mode/Save button to cycle through the available measurement functions: Distance, Area, Volume, Continuous Measurement, and Pythagorean (indirect) measurement.
5.2 Continuous Measurement
In continuous measurement mode, the device will continuously measure and display the distance as you move it, showing maximum and minimum values.
5.3 Area Measurement
- Select Area mode.
- Measure the length.
- Measure the width. The device will automatically calculate and display the area.
5.4 Volume Measurement
- Select Volume mode.
- Measure the length.
- Measure the width.
- Measure the height. The device will automatically calculate and display the volume.
5.5 Pythagorean Measurement (Indirect)
This mode allows for indirect measurement of heights or distances using the Pythagorean theorem. Follow the on-screen prompts to measure the required sides (hypotenuse and one leg) to calculate the unknown side.
5.6 Addition and Subtraction
After taking a measurement, press the +/- button to add or subtract subsequent measurements. The result will be displayed.

Image: The Kiprim LD50E display demonstrating the addition and subtraction function, showing how multiple measurements can be combined.
5.7 Data Storage and Recall
The device can store up to 99 sets of measurement data. Press the Mode/Save button (after a measurement) to save the current reading. Use the arrow buttons (if available, or cycle through modes) to recall stored data. Press OFF/CLEAR to delete the current data.

Image: The Kiprim LD50E display showing a list of up to 99 stored measurement data entries, illustrating its data record capability.
6. Display Indicators
The large backlit LCD display provides clear information about the device's status and measurements.

Image: The Kiprim LD50E's large backlit screen illuminated in a dark setting, demonstrating its readability in low-light conditions.
- Battery Level Indicator: Shows the remaining battery power.
- Laser Status: Indicates if the laser is active.
- Measurement Reference: Icon showing whether measurement is from the front or rear of the device.
- Unit Display: Shows the current unit of measurement (m, in, ft, ft+in).
- Measurement Values: Displays current and previous measurement results.
- Mode Indicator: Shows the active measurement function (e.g., Area, Volume, Pythagorean).
7. Maintenance and Care
7.1 Cleaning
- Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Clean the laser lens carefully with a soft cloth, similar to cleaning camera lenses.
7.2 Storage
- Store the device in its carrying bag in a cool, dry place when not in use.
- Remove batteries if storing for extended periods to prevent leakage.
7.3 IP54 Protection
The Kiprim LD50E is rated IP54, providing protection against dust ingress and splashing water from any direction. This makes it suitable for use in various work environments, but it should not be submerged in water.

Image: The Kiprim LD50E shown in dusty and wet conditions, illustrating its IP54 rating for protection against dust and water splashes.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Low or dead batteries; incorrect battery polarity. | Replace batteries with new ones; ensure correct polarity. |
| Inaccurate measurements | Incorrect reference point; unstable surface; laser beam obstructed; environmental factors (e.g., strong light). | Check reference point setting; ensure stable measurement; clear obstructions; measure in suitable conditions. |
| Display shows "Error" | Measurement out of range; laser signal too weak or too strong. | Ensure target is within measuring range (0.05m to 50m); measure on a suitable reflective surface. |
| No laser beam | Device not powered on; laser emitter fault. | Press READ button to activate laser; if problem persists, contact customer support. |
9. Technical Specifications
| Feature | Specification |
|---|---|
| Measuring Range | 0.05m - 50m (0.16ft - 165ft) |
| Accuracy | ±1/16 inches (±2mm) |
| Measurement Units | m / in / ft / ft+in |
| Laser Class | Class II, <1mW |
| Automatic Shutdown | Laser: 20 seconds; Device: 150 seconds |
| Data Memory | 99 sets |
| 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 (Dust and splash protected) |
| Dimensions | Approx. 115 x 50 x 28 mm (4.5 x 2.0 x 1.1 inches) |
| Weight | Approx. 100g (3.53 ounces) (without batteries) |
| Material | Acrylonitrile Butadiene Styrene |
10. Warranty and Support
Kiprim provides a 24-month warranty for the LD50E Laser Distance Measure from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
For technical support, warranty claims, or any questions regarding your Kiprim LD50E, please contact Kiprim customer service. Refer to the contact information provided in your product packaging or visit the official Kiprim website for assistance.