USB FNIRSI FNB-C2 Tester

FNIRSI FNB-C2 USB Tester

The FNIRSI FNB-C2 USB Tester is a precision instrument designed for detailed analysis of power supply parameters, supporting the latest fast-charging standards and offering extensive diagnostic functions. It is ideal for electronics engineers, service technicians, and DIY enthusiasts to analyze power parameters, USB-C cables, and the charging process.

The device features a wide measurement range up to 240 W, data logging capabilities, power quality analysis, and the ability to read information stored in USB-C cables. It includes a clear HD display with automatic screen rotation and integrates seamlessly with computers without requiring additional drivers.

Laboratory-Grade Accuracy

Equipped with an external 20-bit analog-to-digital converter (ADC), the FNIRSI FNB-C2 delivers laboratory-grade measurement accuracy with up to seven significant digits. It measures voltage, current, and power with an accuracy of 0.000001 V, A, and W respectively, enabling detection of subtle changes in power supply parameters.

• Voltage range: 4 to 50 V
• Current range: up to 6.5 A
• Power range: up to 240 W

The tester supports both traditional chargers and modern power supplies rated at 100 W, 140 W, or 240 W. A built-in temperature sensor monitors device temperature in real time with 1°C accuracy to enhance operational safety.

Comprehensive Charging Control

The tester supports the Power Delivery 3.1 EPR standard via a dedicated communication chip, ensuring stable compatibility with modern chargers. It automatically recognizes and activates popular fast-charging technologies including UFCS, Quick Charge 2.0, 3.0, 4, and 5, Huawei FCP and SCP, OPPO VOOC and SVOOC, and VIVO VFCP.

It can capture Power Delivery protocol negotiation data between charger and device to detect compatibility issues. Additionally, it converts Quick Charge communication to Power Delivery, improving compatibility between devices using different fast-charging standards.

Detailed USB-C Cable Analysis

The FNIRSI FNB-C2 reads information stored in E-Marker chips of USB-C cables, allowing verification of parameters such as current rating (3 A, 5 A), voltage (50 V), EPR, Thunderbolt 3 and 4 support, cable type, length, maximum power, data transfer rate, and standard version.

It offers simulation of various cable configurations, from cables without E-Marker chips supporting up to 60 W to those compliant with 100 W and 240 W EPR profiles. Standard 24-pin USB-C male and female connectors support bidirectional power flow measurement and allow cable connection in either orientation.

Professional Power Quality Analysis

The device provides two modes for power parameter analysis:

• Plotting voltage, current, and D+ and D− waveforms at sampling rates from 2 to 1,000 samples per second.
• Rapid voltage ripple analysis at sampling rates from 20,000 to 2 million samples per second.

It displays USB bus voltage (VBUS) waveform in real time, assessing power supply stability in the frequency range 20 kHz to 2 MHz. The recording function allows continuous voltage and current waveform recording for up to 9 hours, with adjustable recording intervals (1 to 120 seconds) and configurable start and end conditions.

Performance Evaluation Data

The FNIRSI FNB-C2 records measurement results in ten independent statistical sets covering capacity, energy, and runtime. It automatically calculates battery capacity and charging efficiency based on collected data, facilitating performance evaluation of power supplies, power banks, or cells. This enables convenient comparison of successive measurements and monitoring of parameter changes over extended use.

User-Friendly Display and Operation

The 1.54-inch color TFT-LCD display with 240 × 240 pixel resolution provides clear parameter visualization. A built-in gravity sensor automatically rotates the display in four directions for easy readability regardless of device orientation.

The tester is compatible with Windows and macOS computers without requiring additional drivers, allowing easy functionality expansion and software updates by recognizing the device as a USB flash drive. Users can adjust screen brightness, auto-dimming time, color theme, interface language, and quickly restore factory settings if needed.

Technical Specifications

• Manufacturer: FNIRSI
• Model: FNB-C2
• ADC: 20-bit
• Voltage Monitoring: Range 4–50 V, Resolution 0.000001 V, Accuracy ±(0.2‰ + 2)
• Current Monitoring: Range 0–6.5 A, Resolution 0.000001 A, Accuracy ±(0.5‰ + 2)
• Power Monitoring: Range 0–240 W, Resolution 0.000001 W, Accuracy ±(0.5‰ + 2)
• D+/D− Voltage: Range 0–3.3 V, Resolution 0.001 V, Accuracy ±(1.0% + 2)
• CC1/CC2 Voltage: Range 0–3.3 V, Resolution 0.001 V, Accuracy ±(1.0% + 2)
• Device Temperature: Range 1 °C, Resolution 1 °C, Accuracy ±(1.2% + 3)
• Capacity: Range 0–9,999.99 Ah, Resolution 0.00001 Ah
• Energy Consumption: Range 0–9,999.99 Wh, Resolution 0.00001 Wh
• Recording Time: Up to 9 hours, Resolution 1 second

Package Contents

• USB tester
• User manual