FJDynamics LR2 Laser Receiver

Product Information

• Model: LR2 Laser Receiver
• Manufacturer: FJDynamics
• Compatibility: Most models of rotary laser transmitters

Specifications

• Can detect laser beams from most models of rotary laser transmitters
• Designed for use in construction, agriculture, and surveying applications
• Includes lithium battery with charger
• Compatible with the FJDynamics app for data viewing

Product Usage Instructions

Setup

1. Read the user manual carefully before use.
2. Charge the product using the included charger before initial use.
3. If connecting to the FJDynamics app, scan the QR code to download the app and follow the on-screen instructions.
4. Mount the receiver securely on a stable surface or pole.

Operation

• Ensure the receiver is properly aligned to receive laser beams.
• Follow all safety instructions provided in the user manual.
• Avoid exposure to strong radio waves or high-voltage wires.
• Regularly check the product performance to ensure accurate readings.

Maintenance

• Keep the product clean and free from dust or debris.
• Avoid exposing the product to extreme temperatures or moisture.
• If any issues occur, contact customer service for assistance.

Copyright Notice: 

FJDynamics reserves the copyright for this manual and all content herein. No part of this manual may be reproduced, extracted, reused,/or reprinted in any form or by any means without the prior written permission of FJDynamics.
This manual is subject to change without notice.

Revisions: 

Read Before Use

Disclaimer: 

• The purchased products, services, and features are stipulated by the contract. All or part of the products, services, and features described in this manual may not be within the scope of your purchase or usage. Unless otherwise specified in the contract, all the content in this manual is provided “AS IS” without warranties of any kind, express or implied.
• The content of this manual is subject to change due to product upgrades and other reasons. FJDynamics reserves the right to modify the content of this manual without notice.
• This manual only guides the use of this product. Every effort has been made in the preparation of this manual to ensure accuracy of the content, but no information in this manual constitutes a warranty of any kind, express or implied.

Download the FJDynamics App

• Scan the QR code to install the FJDynamics app on your device. Then, start the app, tap ‘Add Device’, connect to LR2, and proceed as prompted to view the data.

Preface

Thank you for purchasing this LR2 Laser Receiver. This product can detect laser beams from most models of rotary laser transmitters on the market. Before using this product, read this manual carefully for the setup, use, and maintenance, and the related warnings and cautions. The warnings describe the dangerous or irregular operations that may lead to minor personal injuries or property losses.

Note
Use this product in accordance with the operation and safety instructions in this manual, and check the product performance on a regular basis. FJDynamics or any of its representative does not assume any responsibility for any consequences of using this product in violation of this manual, including any direct, indirect, and consequential damages and profit losses.

WARNING 

1. When using this product with construction or agricultural machinery, comply with all the safety instructions in the user manual of the machinery.
2. When using this product with excavating machinery, comply with all the safety regulations and practices for excavating and ditching operations.
3. Watch out for overhead obstacles and high-voltage wires when this product is mounted on a pole.
4. Do not use damaged power cables, plugs, or sockets, as they may damage the product.
5. To protect the lithium battery and avoid fires, use the included charger to charge this product, and disconnect the charger when the charging is complete.
6. Keep this product away from sources of strong radio waves, such as TVs, radios, high-voltage wires, and radio transmission towers. They may interfere with wireless communication and cause misoperation.
7. Ensure that this product is in good condition and works in a proper environment. Do not clean the housing with h high-pressure water stream. Though this product is designed with IPX6 water protection, high-pressure water streams and prolonged submersion in water may still damage the internal circuits.
8. Keep this product away from fires and other heat sources to avoid irreversible damage to the housing.

Technical Support

Users are provided with a two-year warranty, starting from the date of purchase. Service charges will be collected for technical support and maintenance services out of the warranty period. Do not disassemble this product, except the mounting plate, without authorization from FJDynamics. Otherwise, FJDynamics shall have the right to terminate the warranty and assume no responsibility for any personal injury or property loss directly or indirectly caused by the unauthorized disassembly.
Contact FJDynamics by any of the following methods:

• Tel: 1833-330-6660 (United States)
• Tel: 496-931-090-130 (Europe)
• Tel: 400-777-6160 (China)
• FJDynamics official website: https://www.fjdynamics.cn(China)
• FJDynamics official website: https://www.fjdynamics.com

Overview

Product Introduction
The FJDynamics LR2 Laser Receiver (LR2) features 360° laser detection within a range (operating radius) of up to 450m, depending on the laser transmitter. It is easy to install and u,se and provides four elevation accuracy options with the highest one reaching ±2 mm to meet various requirements. Users can check the elevation via the LED indicators and wireless or wired terminals, making this product a suitable choice for a wide range of applications.

Specifications

Indicators and Buttons

Panel 

Mode button and indicator patterns 

Tilt button and indicator patterns 

Zero point button and indicator patterns 

Bluetooth indicator
Bluetooth is turned on by default when you turn on the device. When the Bluetooth connection is not established, the Bluetooth indicator is on for 1s and then off for 4s; when the Bluetooth connection is established, the Bluetooth indicator remains lit.

Bluetooth button
Press the Bluetooth button to turn Bluetooth on or off.

Low-battery indicator
The low-battery indicator blinks slowly when the battery level drops to 5%. When the battery level is 0%, the indicator blinks fast, and the device automatically turns off in 10 seconds. Charge the device as soon as possible when the battery is low.

Charging indicator
The charging indicator is solid red during charging and solid green when charging is complete.

Product structure 

Mounting

Using clamps
Fix two clamps to the upper and lower holes on the mounting plate and mount the receiver to a square or round pipe. Determine whether to fix a clamp to the middle holes based on the site requirements.

Using magnets (optional)
Fix two magnets to the upper and lower holes on the mounting plate and attach the receiver to an iron object. Purchase the magnets if needed.

Operation

1. Position a rotary laser transmitter and turn it on.
2. Raise or lower the machine blade or arm to position the cutting edge or bucket at the desired grade elevation.
3. Mount the LR2 onto the mast near the path of the laser beam and turn on the LR2.
4. Keep the machine blade or arm motionless, raise or lower the LR2, and adjust until the zero point indicators blink.
5. Securely clamp the LR2 in place. The zero point is set.
6. While operating, use the LED display to continually check the grade, moving the blade or cut/fill according to the direction of the LR2 display.

Maintenance

1. Keep the receiver housing dry and clean.
2. Keep the bottom of the magnets clean and free of debris.

Waste Disposal

This product contains metal materials and electronic components. Waste from must be disposed of in an environmentally safe way according to local laws and regulations. Any waste, such as packaging materials, metal parts, and electronic components, must be delivered to local recycling facilities for disposal.

Warning message

CE Warning：
When charging, please place the device in an environment that has a normal room temperature and good ventilation. It is recommended to charge the device in an environment with a temperature that ranges from 0℃~40℃. Please ensure to use only the charger offered by the manufacturer. Using an unauthorized charger may cause danger and violate the authorization of the device and the guarantee article. The adapter shall be installed near the equipment and shall be easily accessible.
Warning:- replacement of a battery with an incorrect type that can defeat a safeguard;

• disposal of a battery into fire or a hot oven, or mechanically crushing or cutting a battery, that can result in an explosion;
• Leaving a battery in an extremely high temperature surrounding environment that can result in an explosion or the leakage of flammable liquid or gas; and
• a battery subjected to extremely low air pressure that may result in an explosion or the leakage of flammable liquid or gas.

RF exposure information:
The Maximum Permissible Exposure (MPE) level has been calculated based on a distance of d=20 cm between the device and the human body. To maintain compliance with RF exposure requirements, use a product that maintains a 20cm distance between the device and the human body.

This product can be used across EU member states.

EU Regulatory Conformance
Hereby, FJ Dynamics Co., Ltd. Declares that this device complies with the essential requirements and other relevant provisions of Directive 2014/53/EU.

FCC Warning：
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE:
The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications or changes to this equipment. Such modifications or changes could void the user’s authority to operate the equipment.
When using the product, maintain a distance of 20cm from the body to ensure compliance with RF exposure requirements.

NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital device, punderpart 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used according to the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Equipment Under Test (EUT) Description 

EU Declaration of Conformity

Number

© 2024 FJDynamics. All rights reserved.

Frequently Asked Questions

• Q: Can the LR2 Laser Receiver be used with any brand of rotary laser transmitters?
  A: The LR2 Laser Receiver is compatible with most models of rotary laser transmitters on the market. However, it is recommended to refer to the user manual of your specific transmitter for compatibility.
• Q: How do I know if the receiver is properly aligned to receive laser beams?
  A: Follow the alignment instructions in the user manual. Typically, there will be visual or audible indicators on the receiver to signal proper alignment with the laser beam.
• Q: What should I do if the product is exposed to strong rradio waves
  A: Move the product away from sources of strong radio waves, such as TVs or radios, to ensure accurate readings and performance.

Documents / Resources

FJDynamics LR2 Laser Receiver [pdf] User Manual 2A2LL-LR2, 2A2LLLR2, LR2 Laser Receiver, LR2, Laser Receiver, Receiver

References

• User Manual