1. Introduction et plusview
The eSSL KartString Biometric Time Attendance Machine is designed to provide efficient and secure time management and access control for organizations. This device utilizes fingerprint recognition technology to accurately record employee attendance, ensuring only authorized individuals are tracked. It features a clear display, a user-friendly keypad, and robust data storage capabilities, making it an essential tool for modern workforce management.
This manual provides detailed instructions for the setup, operation, and maintenance of your eSSL KartString Biometric Time Attendance Machine.

Figure 1 : Devant view of the eSSL KartString Biometric Time Attendance Machine, showing the display, keypad, and fingerprint sensor.
2. caractéristiques du produit
- Reconnaissance des empreintes digitales : Secure and accurate biometric identification for attendance.
- High Transaction Storage: Capable of storing up to 100,000 attendance records.
- Color TFT Display: A 2.8-inch color display for clear user interface and information display.
- Multiple Communication Methods: Supports TCP/IP for network connectivity and USB-host for data transfer.
- Clavier intégré : Soft buttons for password entry and menu navigation.
- Conception compacte : Measures approximately 183 x 45 x 138 mm, suitable for various installation environments.
- Cloud-Based Software: Includes 6 months of cloud-based attendance management software by KartString for enhanced data management and reporting.
3. Instructions de configuration
Follow these steps to set up your eSSL KartString Biometric Time Attendance Machine:
- Déballage: Carefully remove the device from its packaging and ensure all components are present.
- Montage (en option) : Choose a suitable location for installation, typically near an entrance or exit. Secure the device to a wall using appropriate mounting hardware (not included, consult a professional if unsure).
- Connexion électrique : Branchez l'adaptateur secteur fourni au port d'entrée d'alimentation de l'appareil, puis branchez-le à une prise électrique standard. L'appareil s'allumera automatiquement.
- Connexion réseau (TCP/IP) : For network-based data management, connect an Ethernet cable from your network router or switch to the device's LAN port.
- Configuration initiale : Upon first power-on, the device may prompt for initial setup, such as date, time, and administrator registration. Follow the on-screen instructions.
4. Mode d'emploi
4.1 Inscription de l'administrateur
Before employees can use the system, an administrator must be registered to manage settings and user data.
- Appuyez sur le M/OK bouton pour accéder au menu principal.
- Accéder à Gestion des utilisateurs or Inscrire un utilisateur en utilisant les touches fléchées.
- Sélectionner Register Admin ou une option similaire.
- Follow the on-screen prompts to scan the administrator's fingerprint multiple times for accurate registration.
- Assign administrator privileges as required.
4.2 Employee Fingerprint Enrollment
Each employee needs to register their fingerprint(s) to use the attendance system.
- Access the main menu as an administrator.
- Accéder à Gestion des utilisateurs or Inscrire un utilisateur.
- Sélectionner Nouvel utilisateur or Enregistrer l'empreinte digitale.
- Enter the employee ID (if prompted) and then instruct the employee to place their finger on the sensor.
- The device will prompt the employee to lift and place their finger several times for a complete scan.
- Confirm successful enrollment.
4.3 Enregistrement des présences
Employees can record their attendance by simply placing their registered finger on the sensor.
- Assurez-vous que l'appareil est allumé et en mode veille.
- The employee places their registered finger firmly on the fingerprint sensor.
- Upon successful recognition, the device will display a confirmation message (e.g., "Thank You" or "Punch In/Out Successful") and an audible prompt.
4.4 Gestion des données
Attendance data can be retrieved via TCP/IP network or USB-host.
- Via TCP/IP: Connect the device to your network. Use the provided cloud-based attendance management software or compatible third-party software to connect to the device and download attendance logs. Refer to the software's documentation for specific instructions.
- Via USB-Host: Insert a USB flash drive into the device's USB-host port. Navigate to Gestion des données or Télécharger les données in the menu. Select the desired data (e.g., attendance logs, user data) and initiate the transfer to the USB drive.
5. Entretien
Un entretien régulier garantit des performances optimales et une longue durée de vie à votre appareil.
- Nettoyage du capteur : Gently wipe the fingerprint sensor with a soft, dry, lint-free cloth. Avoid using abrasive materials or liquid cleaners directly on the sensor.
- Nettoyage de l'appareil : Utilisez un chiffon doux et légèrement sec.amp cloth to clean the exterior of the device. Do not allow water or cleaning solutions to enter the device.
- Sauvegarde des données : Regularly back up attendance data to an external storage device (USB) or through the network software to prevent data loss.
- Mises à jour logicielles : Check the eSSL website or contact support for any available firmware or software updates to ensure your device operates with the latest features and security enhancements.
6. Dépannage
Cette section aborde les problèmes courants que vous pourriez rencontrer.
- L'appareil ne s'allume pas :
- Assurez-vous que l'adaptateur secteur est correctement branché à la fois à l'appareil et à une prise électrique fonctionnelle.
- Vérifiez le bon fonctionnement de la prise de courant en y branchant un autre appareil.
- Empreinte digitale non reconnue :
- Assurez-vous que le doigt est propre et sec.
- Place the entire pad of the registered finger firmly on the sensor.
- Try re-enrolling the fingerprint if recognition issues persist.
- Clean the fingerprint sensor as described in the Maintenance section.
- Cannot Connect to Network (TCP/IP):
- Verify the Ethernet cable is properly connected to both the device and the network router/switch.
- Check network settings on the device to ensure correct IP address, subnet mask, and gateway.
- Vérifiez que votre routeur réseau fonctionne correctement.
- USB Data Transfer Failure:
- Ensure the USB flash drive is properly inserted and formatted to a compatible file système (par exemple, FAT32).
- Essayez une autre clé USB.
- Verify there is sufficient space on the USB drive.
Si vous rencontrez des problèmes non abordés ici, veuillez consulter la section d'assistance.
7. Spécifications
| Modèle | KartString Biomax K 21 |
| Marque | eSSL |
| Capteur d'empreintes digitales | Capteur optique |
| Capacité de transaction | 100,000 Enregistrements |
| Afficher | 2.8 Inch Color TFT |
| Communication | TCP/IP, USB-host |
| Dimensions (L x l x H) | 183 x 45 x 138 mm (environ) |
| Poids de l'article | 650 g |
| Couleur | Noir |
8. Garantie et assistance
The eSSL KartString Biometric Time Attendance Machine comes with standard manufacturer warranty. Please refer to your purchase documentation for specific warranty terms and conditions.
For technical assistance, troubleshooting, or inquiries regarding the included 6-month cloud-based attendance management software by KartString, please contact eSSL customer support or your authorized dealer. Contact information can typically be found on the eSSL official websur votre site ou sur l'emballage de votre produit.
When contacting support, please have your product model (KartString Biomax K 21) and any relevant purchase details ready.





