DROK LD25 USB Load Tester Instruction Manual

1. Úvod

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. Důležité bezpečnostní informace

VAROVÁNÍ: 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.

Zajistěte provozní objtage, current, and power do not exceed the rated maximums to prevent damage to the device or the power source being tested.

3. Vlastnosti a komponenty produktu

• 4-Digit LED Digital Display: Ukazuje svtage, current, and power values.
• Inteligentní chladicí ventilátor: 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.
• Tlačítko ON/OFF: 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.
• SET klíč: 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.
• Ochranné vlastnosti: Voltage protection (OVP), Over-power protection (OPP), Over-temperature protection (OTP).

4. Specifikace

5. Nastavení

1. Příprava zdroje napájení: Ensure the power source (e.g., USB charger, power bank) you intend to test is within the operating voltagRozsah DC 4–25.0 V.
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. Ověřit připojení: 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. Návod k obsluze

6.1 Základní obsluha

1. Zapnutí/vypnutí:
   • Krátce stiskněte Tlačítko ON/OFF to toggle the load output on or off.
   • Dlouze stiskněte Tlačítko ON/OFF to set the default boot state (output on or off) for future use.
2. Úprava proudu: Otočte Nastavitelný potenciometr to increase or decrease the discharge current. The current value will be displayed on the LED screen. Adjust gradually to the desired load.
3. Režimy zobrazení: Krátce stiskněte Tlačítko SET to cycle through the display modes: Voltage (V), proud (A) a výkon (W).
4. Setting Protection Modes: Dlouze stiskněte Tlačítko SET to enter the protection setting menu. Refer to Section 7 for details on protection functions.

6.2 Intelligent Cooling Fan Operation

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. Protection Functions and Troubleshooting

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

• OVP (Over-Voltage ochrana):
  • Activates if the input voltage exceeds 25V (up to 30V).
  • The digital display will show "OVP".
  • Pozor: svtages exceeding 30V can cause permanent damage.
• OTP (ochrana proti přehřátí):
  • Activates if the load temperature exceeds 80°C.
  • The device will stop working, and the digital display will show "OTP".
• OPP (ochrana proti přetížení):
  • 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. Aplikace

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.
• Testování kvality kabelů: Evaluate the quality and performance of Micro USB and Type-C charging cables by observing voltagpád pod zatížením.
• 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. Údržba

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

• Čištění: K čištění zařízení používejte měkký, suchý hadřík. Nepoužívejte tekuté čisticí prostředky ani rozpouštědla.
• Skladování: Přístroj skladujte na chladném a suchém místě mimo dosah přímého slunečního záření a extrémních teplot.
• Zacházení: Zabraňte pádu zařízení nebo jeho vystavení silným nárazům.
• Větrání: Ensure the cooling fan and heat sink are free from dust and obstructions to maintain efficient heat dissipation.