MiLESEEY DP20 Bilateral Laser Distance Meter: User Manual

1. Introduction

The MiLESEEY DP20 Bilateral Laser Distance Meter is a professional-grade measuring tool designed for accuracy and efficiency in various applications. This device features patented coaxial optical technology, multiple measurement functions, and a durable design, making it suitable for both professional and DIY use. This manual provides comprehensive instructions for its safe and effective operation.

Figure 1: MiLESEEY DP20 Bilateral Laser Distance Meter

2. Safety Information

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.

2.1 General Safety

Keep the device out of reach of children.
Do not attempt to modify or disassemble the device. Repairs should only be performed by authorized personnel.
Avoid using the device in explosive atmospheres or near flammable materials.
Protect the device from extreme temperatures, moisture, and strong vibrations.

2.2 Laser Safety

WARNING: This product emits Class 2 laser radiation. Avoid direct eye exposure to the laser beam.

Do not stare directly into the laser beam.
Do not point the laser beam at people or animals.
Do not use optical instruments (e.g., binoculars, telescopes) to view the laser beam.
Ensure the laser is switched off when not in use.

3. Package Contents

Verify that all items are present in the package:

MiLESEEY DP20 Bilateral Laser Distance Meter x1
Hard Case x1
Type-C Charging Cable x1
User Manual x1
Hand Strap x1

Figure 2: Contents included in the DP20 package

4. Product Overview

The MiLESEEY DP20 is engineered for precision and ease of use. Key features include:

Bilateral Measurement: Allows measurement between two points from any position along the measurement line, significantly speeding up tasks.
Patented Coaxial Optical Technology: Ensures both laser beams share a common geometric axis, eliminating measurement inaccuracies.
Multiple Measurement Functions: Includes single, continuous, area, volume, automatic horizontal/vertical height, and line segment division.
OLED Display with Big Text Mode: Provides clear readability of measurements, even in challenging lighting conditions.
Durable and Compact Design: Made from aerospace-grade magnesium-aluminum alloy, offering robustness and a comfortable grip.
Rechargeable Battery: Integrated 1000mAh lithium battery with USB-C charging for extended use.

4.1 Components and Display

Familiarize yourself with the device's components and display interface.

MiLESEEY DP20 OLED Display with Big Text Mode

Figure 3: Clear OLED Display with Big Text Mode for enhanced readability.

Figure 4: Illustration of the patented coaxial optical design for precise measurements.

5. Setup

5.1 Charging the Battery

The DP20 comes with a built-in 1000mAh lithium battery. Before first use, fully charge the device using the provided Type-C charging cable.

Connect the Type-C cable to the charging port on the device.
Connect the other end of the cable to a USB power adapter (not included) or a computer USB port.
The battery indicator on the display will show charging status. A full charge typically takes about 2 hours.

Figure 5: Charging the DP20 via USB-C port.

5.2 Power On/Off

To power on, press the MEAS button.
To power off, long-press the CLEAR/OFF button. The device will also automatically power off after a period of inactivity to conserve battery.

6. Operating Modes

The DP20 offers a variety of measurement modes to suit different needs. Use the MODE button to cycle through the available functions.

6.1 Single and Continuous Measurement

For basic distance measurements.

Press the MEAS button once for a single measurement.
Long-press the MEAS button to enter continuous measurement mode, which also displays minimum and maximum distances. Press MEAS again to stop.

6.2 Bilateral and One-Way Measurement

The DP20 allows switching between bilateral (two-way) and one-way laser measurement.

Use the dedicated button (often labeled T/R or similar, refer to device markings) to switch between bilateral and one-way laser modes.
Bilateral mode measures the distance between two points by positioning the device anywhere along the line.
One-way mode measures from the device to a single target point.

MiLESEEY DP20 One-way and Two-way Measurement

Figure 6: Demonstrating one-way and two-way measurement capabilities.

6.3 Area and Volume Measurement

To calculate area or volume:

Select the Area or Volume mode using the MODE button.
Follow the on-screen prompts to take the required number of measurements (e.g., length and width for area; length, width, and height for volume).
The device will automatically calculate and display the result.

6.4 Pythagorean Measurement

For indirect measurements of height or distance where direct measurement is not possible.

Select the Pythagorean mode using the MODE button.
Follow the on-screen prompts to take the necessary measurements (e.g., hypotenuse and one leg for height).
The device will calculate and display the unknown dimension.

6.5 Line Segment Division (Staking Out)

This function divides a line segment into equal smaller segments, useful for tasks like installing multiple items at consistent intervals.

Enter the Line Segment Division mode (often labeled 1/N).
Set the number of desired segments (N).
Measure the total length of the line. The device will then guide you to the division points.

MiLESEEY DP20 Auto Line Segment Division

Figure 7: Using the auto line segment division feature for consistent spacing.

6.6 Digital Angle Level

The integrated digital angle level provides real-time angle measurements.

The device automatically displays the current tilt angle.
This feature can be used in conjunction with other measurement modes for more complex calculations.

Figure 8: The digital tilt sensor provides accurate angle readings.

7. Advanced Features

7.1 Bluetooth Connectivity and App Synchronization

The DP20 supports Bluetooth connectivity, allowing it to pair with the

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