1. 서론
The diymore USB C Tester is a professional digital measurement device designed for comprehensive analysis of USB-C and Power Delivery (PD) chargers and cables. It provides high-precision measurements of voltage, current, power, and capacity, and can analyze fast charging protocols. Its compact and portable design makes it an essential tool for electricians, technicians, and anyone needing to verify the performance of USB-C power sources and cables.
2. 안전 정보
Please read and understand all safety instructions before using the device. Failure to follow these instructions may result in electric shock, fire, or damage to the device or connected equipment.
- 장치를 습기나 극한의 온도에 노출시키지 마십시오.
- 장치를 분해하거나 개조하지 마십시오.
- Use the device only within its specified voltage and current ranges (DC 4-28V, 0-10A). Exceeding these limits may cause damage.
- 단락을 방지하기 위해 올바르게 연결되었는지 확인하십시오.
- 어린이의 손이 닿지 않는 곳에 보관하세요.
3. 패키지 내용
패키지에 모든 품목이 들어 있는지 확인하세요.
- diymore USB C Tester (Power Meter)
- 보관함
4. 제품 오버view
The diymore USB C Tester features a compact design with a 0.96-inch IPS LCD color screen for clear display of measurement data. It is housed in a durable CNC metal casing.

그림 4.1: diymore USB C Tester with its protective CNC metal housing and compact dimensions (31.8 x 16.1 x 8.1 mm).
The device is equipped with a USB-C input and output, allowing it to be inserted inline between a power source and a load. It features two control buttons (K- and K+) for navigating menus and adjusting settings.
5. 설정
The diymore USB C Tester is designed for plug-and-play operation. No external power supply is required for the tester itself.
- Connect the USB-C male connector of the tester to the USB-C output port of your power source (e.g., charger, power bank).
- Connect your USB-C device (e.g., smartphone, tablet, laptop) to the USB-C female port of the tester using a compatible USB-C cable.
- The tester's display will automatically power on and begin showing real-time measurement data.

그림 5.1: Example setup showing the USB C Tester connected in-line with a PD3.1 charger and a laptop.
메모:
- 1. The tester supports peak voltage up to 36V and peak current up to 10A.
- 2. When only the PD charging head is connected without a load, the device may not start. It must be connected to a useful electrical equipment in order to work.
6. 사용 설명서
The diymore USB C Tester features multiple display interfaces and functions, navigable via the K- and K+ buttons.
6.1. 버튼 기능

그림 6.1: Quick explanation of button functions for navigating display pages and settings.
Use the K- and K+ buttons to switch between display pages, adjust settings, and confirm selections. A short press typically switches screens or values, while a long press activates specific functions.
6.2. Display Pages
The tester offers four main display interfaces:
P1: Large Display (Current/Voltage)
This page provides a clear, large character display of real-time voltage (U), current (I), and power (P). It also indicates the current direction.
- Long press K-: Switch data refresh speed (2nd gear).
- Long press K+: Rotate the screen display direction.
- Short press KEY- KEY+ button: Switch between screens forward/backwards.

그림 6.2: P1 interface displaying large voltage, 전류 및 전력 값.
P2: Fast Charging Protocol Display & Detection
This page displays voltage (V), current (A), power (W), recording capacity (Wh), D+/D- communication line voltage, and detects fast charging protocols (PD/QC/PPS).
- Long press K-: Switch Ah, Wh capacity display unit.
- Long press K+: Switch capacity recording starting current threshold.
- 메모: Only records when current ≥ threshold; less than this current will automatically stop capacity accumulation.

그림 6.3: P2 interface for fast charging protocol detection and detailed charging parameters.
P3: Capacity Statistics Screen
This screen provides statistics on charging energy (Wh), recording time (R), maximum recorded values (MAX), and average values (AVG) calculated since power-on.
- Long press K-: Clear capacity records.
- Long press K+: Switch between MAX and AVG display.

그림 6.4: P3 interface for monitoring charging capacity statistics.
P4: Data & Cable Test Screen
This page is used for ripple testing and cable resistance measurement. It displays ripple frequency, measurement gear, ripple value, and real-time voltage, 전류 및 전력 값.
- Long press K-: Enter Cable Submenu.
- Long press K+: Switch Samp링 주파수.
- 메모: Measuring ripple requires a professional commercial load.

그림 6.5: P4 interface for data and cable testing, including ripple measurement.
7. 유지관리
To ensure the longevity and accuracy of your diymore USB C Tester, follow these maintenance guidelines:
- 청소: 부드럽고 마른 천을 사용하여 기기를 닦으세요. 연마성 세제나 용제는 사용하지 마세요.
- 저장: Store the tester in its provided storage box when not in use to protect it from dust and physical damage. Avoid storing in areas with high humidity or extreme temperatures.
- 손질: 기기를 조심스럽게 다루십시오. 떨어뜨리거나 강한 충격을 주지 마십시오.
8. 문제 해결
If you encounter issues with your diymore USB C Tester, refer to the following common problems and solutions:
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 디스플레이가 켜지지 않습니다. | No power source or no load connected. | Ensure the tester is connected between a working power source and a device drawing power. The tester requires a load to activate. |
| 부정확한 판독값. | Faulty cable, unstable power source, or device malfunction. | Try using a different USB-C cable. Test with a known good power source and load. If issues persist, the device may require service. |
| 버튼이 반응하지 않습니다. | 일시적인 소프트웨어 오류입니다. | Disconnect and reconnect the tester to reset it. |
| Cannot detect fast charging protocol. | Connected device/charger does not support fast charging, or cable is not compatible. | Ensure both the charger and the device support the desired fast charging protocol (e.g., PD, QC, PPS) and that the cable is rated for it. |
9. 사양
Detailed technical specifications for the diymore USB C Tester:
- 모델: USB 테스터
- 권tage 측정 범위: DC 4-28V (supports peak up to 36V)
- 전류 측정 범위: 0-10A (supports peak up to 10A)
- 전력 측정 범위: Up to 360W (peak)
- 표시하다: 0.96-inch IPS LCD Color Screen
- ADC Chip: 16-bit Independent ADC Chip (for accurate data line resistance measurement)
- 고속 충전 프로토콜 지원: PD/QC/PPS detection
- 치수: 31.8 x 16.1 x 8.1mm(약 7 x 1 x 2cm)
- 무게: 20그램
- 주택: CNC Metal
- 제조업체 부품 번호: KBAI0051-AAC

그림 9.1: Key technical features including the 16-bit ADC chip and measurement capabilities.
10. 보증 및 지원
For warranty information and technical support, please refer to the retailer's return policy or contact diymore directly through their official channels. Specific warranty terms may vary by region and retailer.
- 반품 정책: Typically 30 days for refund/replacement (as per Amazon buybox winner info).
- 제조업체: DIY모어
- 파는 사람: diymore® (fulfilled by Amazon)
For further assistance, please visit the diymore official web사이트를 방문하거나 고객 서비스에 문의하세요.