FNIRSI FNB-C2 USB tester

The FNIRSI FNB-C2 USB tester is a practical tool for electronics technicians, service engineers, and demanding users who need to quickly verify the behavior of chargers, power banks, USB‑C cables, and powered devices. Thanks to an external 20-bit ADC, it provides high accuracy and can capture even very small changes in voltage, current, and power.

What FNB-C2 helps you check:

• Measurement of voltage, current, and power across a wide range up to 50 V / 6.5 A / 240 W.
• Fast charging support (automatic detection and activation) including: UFCS, Quick Charge 2.0/3.0/4/5, Huawei FCP/SCP, OPPO VOOC/SVOOC, VIVO VFCP, and Power Delivery 3.1 EPR.
• PD negotiation logging between the charger and device for easier detection of compatibility issues.
• Reading data from USB‑C cables with an E‑Marker chip (e.g., 3 A/5 A, EPR, Thunderbolt 3/4), including parameters such as type, length, max power, or standard.
• Power quality analysis and waveform display (VBUS, D+/D−) in various sampling modes, including fast ripple analysis.

The tester has a 1.54" color TFT-LCD display (240 × 240) and, thanks to the built-in gravity sensor, the image automatically rotates in four directions. No drivers are required for connection to a PC (Windows/macOS) – the device is recognized as a USB flash drive, which makes file handling and updates easier.

Package contents:

• USB tester
• user manual