Fnirsi FNB-C2 USB current and voltage tester PD3.1 EPR TBT4 240W

The Fnirsi FNB-C2 is a high-precision USB-C tester designed for professional signal analysis and power monitoring. It utilizes an external 20-bit ADC chip to provide lab-grade accuracy with a 7-digit display for voltage, current, and power, featuring a resolution of up to 0.000001V/A/W. The device is fully compatible with the PD3.1 EPR protocol, supporting high-power charging scenarios up to 240W.

This tester includes comprehensive fast-charging protocol detection, automatically identifying and triggering protocols such as UFCS, QC2.0/3.0/4/5, Huawei FCP/SCP, OPPO VOOC/SVOOC, and VIVO VFCP. The integrated USB-C E-Marker chip identification allows users to read detailed specifications of 3A/5A/50V/EPR/TBT3/TBT4 cables, including type, power limits, and transmission speeds.

Advanced diagnostic features include double-mode ripple and waveform testing, offering low-speed waveform drawing for VBUS and D+/D- lines, as well as high-speed AC-coupled ripple testing up to 2Msps. The PD protocol packet capture function monitors real-time negotiation data between devices to solve compatibility issues. Additionally, the device supports QC to PD protocol conversion to adapt legacy devices to modern chargers.

The hardware features a 1.54-inch HD TFT-LCD display with a built-in gravity sensor for automatic screen rotation. The bidirectional USB-C interface is equipped with 24-PIN connectors supporting USB4 Gen3 standards. For data logging, it provides 10 sets of energy statistics and a 9-hour continuous curve recording function with customizable intervals.