FNIRSI® FNB48S USB Tester

- The USB voltmeter features a high-resolution display capable of toggling between five or six digits for enhanced readability.

- Utilizing cutting-edge display technology, the screen ensures optimal clarity and visibility in various lighting conditions.

- Boasting a maximum resolution of 0.00001, users can monitor voltage, current, and power fluctuations with unparalleled precision during charging.

- Equipped with a USB 3.0 interface featuring a 9-pin design, the voltmeter offers seamless connectivity and is backward compatible with USB 2.0 for enhanced versatility.

- Powered directly through the USB connection, eliminating the need for additional power sources and ensuring hassle-free operation.

1. **Measurement Data Recording:**

- Capable of recording 10 sets of measurement data, enabling users to analyze charging patterns and calculate battery capacity. The integrated calculation function simplifies the process by providing the battery capacity directly, multiplied by 1000.



2. **Realtime Monitoring:**

- Facilitates real-time monitoring of voltage, current, and power fluctuations during charging. Users can switch between five or six digits display with a maximum resolution of 0.00001, ensuring precise monitoring of subtle changes.



3. **Easy Reading:**

- Supports reading for E Marker and DASH line data, allowing users to easily interpret chip information after connecting the data cable. This feature streamlines data analysis and enhances user efficiency.



4. **Downward Compatible:**

- With its USB 3.0 interface and 9-pin design, the voltmeter ensures backward compatibility with USB 2.0, eliminating compatibility issues. Users can directly test the charging protocols of select phones without requiring primary data cables.



5. **Screen Flip Function:**

- Utilizes gravity sensing technology to support a screen flip function, enabling users to adjust the screen orientation based on gravity direction. Additionally, users can manually flip the screen by long-pressing the middle button, providing flexibility in viewing angles for optimal user experience.

- The USB voltmeter is equipped with a USB 3.0 interface featuring a 9-pin design, ensuring seamless connectivity with compatible devices. This interface is backward compatible with USB 2.0, expanding its compatibility range.

- Powered directly through the USB connection, the voltmeter eliminates the need for external power sources, offering convenience and portability.

- Compact and lightweight, the USB voltmeter boasts dimensions designed for portability and convenience.

- Its sleek and ergonomic design makes it ideal for both home and on-the-go usage.

- The USB voltmeter package includes the voltmeter device itself, a USB data cable for connectivity, and a user manual for easy setup and operation.

1. Do not connect a power supply exceeding 24V to the tester.

2.The FNB38 USB-A input port supports high-power input (such as 20V * 5A = 100W. The USB-A output port can withstand 5A current for a short time, The Micro-USB input port does not support large current and high power, and its input current cannot exceed 2.5A. When using high current and high power, it is recommended to use Тype -C female output.

3. The HID-USB interface is only used for data transmission

4. When using high voltage and high power, the temperature of the tester will rise. Please be careful to prevent burns.

When upgrading the firmware of the USB tester, you need to confirm the model first. Please do not use the firmware of other models to upqrade to avoid unexpected errors.