DROK LD25 USB Load Tester Instruction Manual

1. Introduction

The DROK LD25 USB Load Tester is an intelligent temperature-controlled electronic load module designed for testing USB and Type-C power sources and cables. It features high power, high current, and high voltage capabilities, along with intelligent control for precise measurements. This device is ideal for verifying charger output capacity, testing cable quality, and performing bulk aging tests.

It provides a constant current discharge task up to 4A, 25V, and 25W, offering a user-friendly interface and robust performance for diverse testing requirements.

2. Informations importantes sur la sécurité

AVERTISSEMENT: This product does not have reverse connection protection. The input polarity cannot be reversed. Reversing the input polarity will cause permanent damage to the product and it cannot be repaired. Always ensure correct polarity before connecting the device.

Assurer le vol de fonctionnementtage, current, and power do not exceed the rated maximums to prevent damage to the device or the power source being tested.

3. Caractéristiques et composants du produit

• 4-Digit LED Digital Display: Montre le volumetagvaleurs de courant et de puissance.
• Ventilateur de refroidissement intelligent : Oil bearing fan with intelligent temperature control, speed up to 5800±10% RPM. Activates automatically when current exceeds 2A or temperature exceeds 40°C.
• Precision Adjustable Potentiometer: Allows fine-tuning of the output current.
• USB Male Port: For connecting to USB power sources.
• Micro USB Port (Max. Current: 2A): For testing Micro USB cables and devices.
• Type-C Port (Max. Current: 4A): For testing Type-C cables and devices.
• Touche MARCHE/ARRÊT : Short press to toggle the load output on or off. Long press to set the default boot state (output on or off) for future use.
• Touche SET : Short press to cycle through the display modes: Voltage (V), Current (A), and Power (W). Long press to enter the protection setting menu.
• Full Aluminum Heat Sink: Efficient heat dissipation for stable operation.
• Fonctions de protection : Survoltage protection (OVP), Over-power protection (OPP), Over-temperature protection (OTP).

4. Spécifications

5. Installation

1. Préparer la source d'alimentation : Ensure the power source (e.g., USB charger, power bank) you intend to test is within the operating voltagla gamme de DC 4-25.0V.
2. Connect the Load Tester:
   • For standard USB power sources: Plug the USB male port of the LD25 directly into the USB output port of your charger or power bank.
   • For Micro USB or Type-C cables/devices: Connect the Micro USB or Type-C port of the LD25 to the respective cable or device.
3. Vérifiez la connexion : Once connected, the 4-digit LED display should illuminate, indicating the device is powered on. If it does not power on, check the connection and ensure the power source is active.
4. Initial Current Setting: Before applying a load, ensure the adjustable potentiometer is set to a low current or off position to avoid sudden high current draw.

6. Mode d'emploi

6.1 Fonctionnement de base

1. Marche/Arrêt :
   • Appuyez brièvement sur le Touche ON/OFF to toggle the load output on or off.
   • Appuyez longuement sur le Touche ON/OFF to set the default boot state (output on or off) for future use.
2. Courant de réglage : Faites pivoter le Potentiomètre réglable to increase or decrease the discharge current. The current value will be displayed on the LED screen. Adjust gradually to the desired load.
3. Modes d'affichage: Appuyez brièvement sur le SET clé to cycle through the display modes: Voltage (V), Courant (A) et Puissance (W).
4. Setting Protection Modes: Appuyez longuement sur le SET clé to enter the protection setting menu. Refer to Section 7 for details on protection functions.

6.2 Fonctionnement intelligent du ventilateur de refroidissement

The intelligent cooling fan will automatically activate under the following conditions to maintain optimal operating temperature:

• When the discharge current exceeds 2A.
• When the internal temperature of the device exceeds 40°C.

The fan supports continuous 25W discharge and ensures uninterrupted operation by efficiently dissipating heat.

7. Fonctions de protection et dépannage

The LD25 USB Load Tester incorporates several protection mechanisms to ensure safe operation and prevent damage to the device and connected equipment.

• OVP (survoltaget Protection) :
  • Activates if the input voltage exceeds 25V (up to 30V).
  • The digital display will show "OVP".
  • Prudence: Voltages exceeding 30V can cause permanent damage.
• OTP (Over-Temperature Protection):
  • Activates if the load temperature exceeds 80°C.
  • The device will stop working, and the digital display will show "OTP".
• OPP (Over-Power Protection):
  • Activates if the discharge power exceeds 25W.
  • The device will stop working, and the digital display will show "OPP".

When a protection condition is met, the device will halt operation. To resume, address the underlying issue (e.g., reduce voltage, allow cooling, reduce power draw) and then manually or automatically reset the load as configured.

8. Applications

The DROK LD25 USB Load Tester is a versatile tool for various testing scenarios:

• Charger Testing: Measure the actual output current capacity of USB chargers and power banks.
• Cable Quality Testing: Evaluate the quality and performance of Micro USB and Type-C charging cables by observing voltagchute sous charge.
• Bulk Aging Tests: Suitable for factory quality control and aging tests of chargers and power supplies.
• Power Delivery Verification: Confirm stable power output from various USB power sources.

9. Entretien

To ensure the longevity and accurate performance of your DROK LD25 USB Load Tester:

• Nettoyage: Utilisez un chiffon doux et sec pour nettoyer l'appareil. N'utilisez pas de nettoyants liquides ni de solvants.
• Stockage: Conservez l'appareil dans un endroit frais et sec, à l'abri de la lumière directe du soleil et des températures extrêmes.
• Manutention: Évitez de laisser tomber ou de soumettre l'appareil à des impacts violents.
• Ventilation: Ensure the cooling fan and heat sink are free from dust and obstructions to maintain efficient heat dissipation.