1. 서론
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. 중요한 안전 정보
경고: 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.
운영 볼륨 확인tage, current, and power do not exceed the rated maximums to prevent damage to the device or the power source being tested.
3. 제품 특징 및 구성품
- 4-Digit LED Digital Display: 권을 보여줍니다tage, 전류 및 전력 값.
- 지능형 냉각 팬: 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.
- 온/오프 키: 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.
- 설정 키: 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.
- 보호 기능: 오버볼tage protection (OVP), Over-power protection (OPP), Over-temperature protection (OTP).
4. 사양
| 매개변수 | 값 |
|---|---|
| 정격 작동 볼륨tage | DC 4-25.0V |
| 최대 방전 전력 | 25와트 |
| 정격 작동 전류 | 0.25-4.00A (Min. 0.05A when fan is off) |
| 팬 속도 | Oil bearing intelligent temperature control fan, 5800±10% RPM |
| Constant Current Resolution | ± (1 % + 3 자리) |
| 방열 방식 | Intelligent temperature control fan + Aluminum heat sink |
| 작동 온도 | -10℃~+40℃ |
| 조정 가능한 전위차계 | Precision multiloop adjustable potentiometer |
| 디스플레이 모드 | 4-bit LED tube |
| 확장 포트 | Micro USB port, Type-C port |
| 제품 치수 | 84 x 41 x 28mm |
| 제품 무게 | 57g |
5. 설정
- 전원 공급 장치를 준비하세요: Ensure the power source (e.g., USB charger, power bank) you intend to test is within the operating voltagDC 4-25.0V 범위.
- 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.
- 연결 확인: 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.
- 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. 사용 설명서
6.1 기본 작업
- 전원 켜기/끄기:
- 짧게 누르세요 ON/OFF 키 to toggle the load output on or off.
- 길게 누르세요 ON/OFF 키 to set the default boot state (output on or off) for future use.
- 현재 조정: 회전하다 조정 가능한 전위차계 to increase or decrease the discharge current. The current value will be displayed on the LED screen. Adjust gradually to the desired load.
- 디스플레이 모드 : 짧게 누르세요 SET 키 to cycle through the display modes: Voltag전압(V), 전류(A), 전력(W).
- Setting Protection Modes: 길게 누르세요 SET 키 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. 보호 기능 및 문제 해결
The LD25 USB Load Tester incorporates several protection mechanisms to ensure safe operation and prevent damage to the device and connected equipment.
- OVP(과대거래량tag전자 보호):
- Activates if the input voltage exceeds 25V (up to 30V).
- The digital display will show "OVP".
- 주의: 권tages exceeding 30V can cause permanent damage.
- 과열 방지(OTP):
- Activates if the load temperature exceeds 80°C.
- The device will stop working, and the digital display will show "OTP".
- OPP(과전력 보호):
- 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. 응용 프로그램
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 voltage drop under load.
- 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. 유지관리
To ensure the longevity and accurate performance of your DROK LD25 USB Load Tester:
- 청소: 부드럽고 마른 천으로 기기를 닦으십시오. 액체 세척제나 용제를 사용하지 마십시오.
- 저장: 본 기기는 직사광선과 극한의 온도를 피해 시원하고 건조한 곳에 보관하세요.
- 손질: 장치를 떨어뜨리거나 강한 충격을 가하지 마십시오.
- 통풍: Ensure the cooling fan and heat sink are free from dust and obstructions to maintain efficient heat dissipation.