DeWin JQ40 Mini Portable Digital Laser Distance Meter 40M User Manual

1. Introduction

Thank you for choosing the DeWin JQ40 Mini Portable Digital Laser Distance Meter. This device is designed for accurate and efficient distance, area, and volume measurements. Please read this manual carefully before using the product to ensure safe and correct operation. Keep this manual for future reference.

2. Safety Information

Laser Radiation: This device emits Class 2 laser radiation. Do not stare into the laser beam or direct it at other people or animals. Avoid direct eye exposure.

General Precautions:

• Do not attempt to modify or disassemble the device.
• Keep the device away from children.
• Do not use the device in explosive environments or near flammable materials.
• Protect the device from extreme temperatures, moisture, and strong vibrations.

3. Package Contents

Verify that all items are present in the package:

• 1 x DeWin JQ40 Laser Distance Meter
• 1 x User Manual
• 1 x USB Charging Cable
• 1 x Lanyard

Image 3.1: DeWin JQ40 Laser Distance Meter, USB cable, and lanyard.

4. Product Overview

4.1. Device Components

Image 4.1: Front view of the JQ40 with button labels.

4.2. Button Functions

Image 4.2: Detailed button function diagram.

• ON / Measure Button: Powers on the device, initiates single measurement.
• C / OFF Button: Powers off the device, clears current measurement, or cancels an operation.
• ± / U Button: Switches between measurement units (meter/foot/inch), adds/subtracts measurements.
• Arrow Left Button: Selects measurement modes (distance, area, volume, Pythagorean).
• Benchmark Switch Button: Changes the measurement reference point (front or rear of the device).

4.3. Screen Display

Image 4.3: Screen display indicators.

Image 4.4: Illuminated screen display.

• Battery Indication: Shows current battery level.
• Signal Indication: Indicates laser signal strength.
• Laser Emission Indication: Shows when the laser is active.
• Maximum/Minimum Indication: Displays max/min values in continuous measurement mode.
• Auxiliary Area: Displays previous measurements or calculated values.
• Main Display Area: Shows the current measurement result.

5. Setup

5.1. Charging the Battery

The JQ40 is equipped with a 200mAh Li-ion battery. Before first use, fully charge the device.

1. Connect the included USB charging cable to the device's charging port.
2. Connect the other end of the USB cable to a standard USB power adapter (not included) or a computer's USB port.
3. The battery indicator on the screen will show charging status. A full charge takes approximately 30 minutes and allows for up to 2000 measurements.

Image 5.1: USB charging cable and lanyard.

5.2. Power On/Off

• Power On: Press the ON button. The screen will light up.
• Power Off: Press and hold the C/OFF button for a few seconds. The device will also automatically power off after a period of inactivity to save battery.

6. Operating Modes

Press the Arrow Left button to cycle through different measurement modes.

6.1. Single Distance Measurement

1. Power on the device.
2. Ensure the device is in single distance measurement mode (usually the default).
3. Point the laser at the target.
4. Press the ON button to emit the laser and take a measurement. The result will be displayed on the main screen.

6.2. Continuous Measurement (Tracking)

1. Press the Arrow Left button until the continuous measurement icon appears.
2. Press the ON button. The device will continuously measure the distance, displaying real-time values, along with maximum and minimum distances.
3. Press the ON button again to stop continuous measurement.

6.3. Area Measurement

1. Press the Arrow Left button until the area measurement icon appears.
2. Measure the first side (e.g., length) by pointing the laser and pressing ON.
3. Measure the second side (e.g., width) by pointing the laser and pressing ON.
4. The device will automatically calculate and display the area.

6.4. Volume Measurement

1. Press the Arrow Left button until the volume measurement icon appears.
2. Measure the length, then the width, and finally the height, pressing ON after each measurement.
3. The device will automatically calculate and display the volume.

6.5. Pythagorean Measurement

This mode allows indirect measurement of height or distance using the Pythagorean theorem.

1. Press the Arrow Left button until the Pythagorean measurement icon appears.
2. Follow the on-screen prompts to measure the required sides (hypotenuse and one leg) by pointing the laser and pressing ON for each.
3. The device will calculate and display the unknown side.

7. Settings and Features

7.1. Unit Conversion

Press the ± / U button to cycle through measurement units: meters (m), feet (ft), and inches (in). The device will retain your last selected unit.

7.2. Measurement Benchmark

Press the Benchmark Switch button to change the reference point for measurements. You can choose between measuring from the front edge or the rear edge of the device.

7.3. Data Storage

The device is designed for reasonable data storage, making it convenient to access and recall previous measurements.

Image 7.1: Data storage feature.

7.4. Auto-Calibration

The JQ40 features auto-calibration for consistent accuracy.

7.5. Buzz Indication

The device provides an audible buzz indication for operations and measurements.

8. Maintenance

8.1. 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.

8.2. Storage

• Store the device in a dry, cool place, away from direct sunlight and extreme temperatures.
• The recommended storage temperature is -25℃ to 60℃ (-13°F to 140°F).

8.3. Water and Dust Resistance

The JQ40 has an IP54 rating, meaning it is resistant to splashing water and dust. This allows for use in various construction environments, protecting electronic components from corrosion damage.

Image 8.1: IP54 water and dust resistance.

9. Troubleshooting

10. Specifications

11. Warranty and Support

Specific warranty information is not provided in the product details. For warranty claims or technical support, please refer to the retailer or manufacturer's official website where you purchased the DeWin JQ40 Laser Distance Meter.