1. Introduction
Thank you for choosing the Adel DIY-3398 Biometric Fingerprint Door Lock. This manual provides essential information for the proper installation, operation, and maintenance of your new lock. Please read these instructions carefully before installation and use to ensure optimal performance and security.
The Adel DIY-3398 offers a secure and convenient keyless entry solution, combining fingerprint recognition, a PIN keypad, and a mechanical key for versatile access.
2. Product Overview
2.1. Features
- Multiple Access Methods: Unlock using fingerprint, password, or mechanical key. An independent mechanical key is available for emergency use if electronic components fail.
- User Capacity: Supports up to 120 unique fingerprints and 1 password.
- Reversible Handle: Designed for compatibility with both left and right-hand side doors.
- Moisture-Proof Design: The PCB surface is epoxy encapsulated to protect against moisture.
- Self-Management: Easily add new users, delete existing ones, and initialize the lock directly from the device.
- Standardized Operation: Utilizes international standardized operational methods for ease of use.
- Robust Construction: Features a U.S. standard single latch with a strengthened internal structure and integrated lock cast.
- Anti-Pick Functions: Enhanced security against tampering.
- Power Supply: Operates on four 1.5V AA alkaline batteries. An external 6V-9V battery can be used for emergency power when the internal batteries are low.
- Low Voltage Alarm: An audible alarm notifies the user when battery voltage is low, indicating it's time for replacement.
- Operational Feedback: Provides clear signal and sound tips for various operations and status indications.
- High Accuracy: Fingerprint recognition boasts a low false rejection rate (<1ppm).
- Door Thickness Compatibility: Suitable for doors with a thickness range of 30mm to 60mm.
- Quick Verification: Fingerprint verification takes less than 1 second.
- Long Battery Life: Approximately 10,000 cycles on a single set of batteries.
- Automatic Locking: The lock automatically closes within 5 seconds.
2.2. Components
Familiarize yourself with the main components of your Adel DIY-3398 lock:

Figure 1: Lock Components Diagram

Figure 2: Key Features Overview (Fingerprint + PIN, Batteries, Emergency Power, Latch)
3. Specifications
The following table details the technical specifications of the Adel DIY-3398 Fingerprint Door Lock:

Figure 3: Technical Specifications Table
| Parameter | Detail |
|---|---|
| Capacity | Supports up to 120 fingerprints, and 1 password |
| Fingerprint template registration | Twice for each fingerprint to generate a template |
| Store | Fingerprint templates are stored automatically |
| Verification time | Less than 1 second |
| Verification method | 1:N |
| FRR (False Rejection Rate) | ≤ 1% |
| FAR (False Acceptance Rate) | ≤ 0.0001% |
| Angle for finger position | Any angle |
| Sensor | 30 megapixel CMOS color sensor |
| Resolution | 500 DPI |
| Anti-destruction sensor | 4H pencil 20 cm continuous impact 1000 times without damaging |
| Static power consumption | <10 µA |
| Dynamic power consumption | <200 mA |
| Operating voltage | Four 1.5V alkaline batteries, 6-volt DC |
| Battery life | About one million times (less than 4.5V) |
| Automatic Close | In 5 seconds automatically |
| Color | Satin Chrome |
| Door Thickness | 30mm – 60mm |
| Locking Mechanism | Advanced single latch door lock |
4. Setup and Installation
The Adel DIY-3398 lock is designed for DIY installation. It is compatible with door thicknesses between 30mm and 60mm. Ensure your door meets these specifications before proceeding.
4.1. Handle Reversal
The lock features a reversible handle, allowing it to be adapted for both left and right-hand opening doors. Follow the diagram below to change the handle direction if needed:

Figure 4: Field Changeable Handle Lever Instructions
4.2. General Installation
While specific drilling and mounting templates are typically provided with the physical product, the general steps involve:
- Prepare the door: Ensure the door is clean and the existing boreholes match the lock's requirements.
- Install the latch: Insert the single bolt latch into the door edge.
- Mount the exterior assembly: Position the front lock body, ensuring the spindle aligns with the latch mechanism.
- Mount the interior assembly: Attach the back lock body, connecting any necessary cables.
- Secure the lock: Fasten the lock bodies together with screws.
- Install batteries: Insert four 1.5V AA alkaline batteries into the battery compartment.
- Test functionality: Verify that the lock operates correctly using the mechanical key before programming any fingerprints or passwords.
For detailed, step-by-step installation instructions, please refer to the comprehensive user manual included with your product packaging.
5. Operating Instructions
5.1. Unlocking the Door
- Fingerprint: Place your registered finger on the fingerprint sensor. The indicator light will confirm successful verification, and the lock will unlock.
- Password: Enter your registered password on the PIN keypad. The indicator light will confirm successful verification, and the lock will unlock.
- Mechanical Key: In case of electronic failure or low battery, insert the mechanical key into the keyhole and turn to unlock.
5.2. Adding Users (Fingerprints/Passwords)
The Adel DIY-3398 allows for self-management of users. To add new fingerprints or change the password, you will typically enter a programming mode. The exact steps for entering programming mode and registering new users are detailed in the full user manual. Generally, this involves:
- Accessing programming mode (e.g., by pressing a specific button or sequence).
- Following voice or light prompts to register a new fingerprint (usually requiring two scans of the same finger).
- Following prompts to set or change the password.
5.3. Deleting Users
To delete individual users or reset the lock to factory settings (which deletes all users), refer to the detailed instructions in the full user manual. This process also typically involves entering programming mode.
5.4. Low Battery Warning and Emergency Power
When the battery voltage drops below a critical level, the lock will emit an audible alarm to alert you. At this point, you should replace the four 1.5V AA alkaline batteries promptly. If the batteries completely drain before replacement, you can use an external 6V-9V battery connected to the emergency power ports to temporarily power the lock and gain access.
6. Maintenance
- Battery Replacement: Replace the four 1.5V AA alkaline batteries when the low voltage alarm sounds. Always use new, high-quality alkaline batteries.
- Cleaning: Wipe the fingerprint sensor and keypad regularly with a soft, dry cloth to remove dust, dirt, or smudges that might affect performance. Avoid using abrasive cleaners or solvents.
- Mechanical Key: Keep the mechanical key in a safe, accessible location outside the locked area for emergency use.
- Moisture Protection: While the lock has a moisture-proof design, avoid direct exposure to heavy rain or excessive moisture to prolong its lifespan.
7. Troubleshooting
- Lock not responding: Check battery level. If the low voltage alarm has sounded, replace batteries or use external emergency power.
- Fingerprint not recognized: Ensure your finger is clean and dry. Try different angles or re-register your fingerprint if issues persist.
- Password not working: Double-check the entered password. Ensure the keypad is clean and free from debris.
- Electronic parts failure: If the electronic functions cease to work, use the mechanical key to unlock the door. Contact support if the issue persists after battery replacement.
- Handle feels loose: Check the installation screws and ensure they are tightened securely.
8. User Tips
- Register Multiple Fingers: For convenience and reliability, register at least two fingers (e.g., index and middle finger) from each hand.
- Practice Finger Placement: Consistent finger placement on the sensor improves recognition speed and accuracy.
- Keep Emergency Key Handy: Always store the mechanical key in a secure and easily accessible location outside the premises, such as with a trusted neighbor or in a secure outdoor lockbox.
- Regular Battery Checks: Even without the low battery alarm, consider checking and replacing batteries every 6-12 months, depending on usage, to prevent unexpected lockouts.
- Clean Sensor Regularly: A clean fingerprint sensor ensures optimal performance.
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact the seller directly. If you encounter any issues that cannot be resolved using the troubleshooting guide, please reach out to the manufacturer's or seller's customer support for assistance.