FNB48P USB Fast Charge Tester

1. Versions and Updates

Note: This product undergoes frequent software and hardware updates. The manual may be updated at any time. Please refer to the official website for the latest information.

2. Overview

The FNB48P USB tester is a high-reliability, high-safety USB voltage and current detection meter and a mobile communication terminal fast charging trigger. It features a 1.77-inch TFT-LCD display and integrated USB-A, Micro-USB, and Type-C interfaces. It utilizes a dedicated 16-bit ADC and a PD protocol physical chip. The device can measure the power supply or consumption of USB interfaces, mobile phone chargers, U disks, etc. It can also test mobile phone charging power, mobile power input/output conditions, and charger fast charging protocols. This manual contains essential safety information, warning tips, and solutions for common abnormal situations. Please read carefully and adhere strictly to all warnings and precautions.

3. Safety Precautions

• Do not connect the monitoring interface to a power supply exceeding 24V.
• Do not connect the PC connection port to a power source exceeding 16V.
• Only one pair of monitoring interfaces (one input port, one output port) can operate simultaneously. When a pair of monitoring interfaces is active, connecting equipment to other monitoring interfaces is prohibited (except for the PC connection port, which can be connected to an external power supply).
• When using the fast charge trigger module, do not connect equipment that cannot withstand high voltage to any monitoring interface.
• After using PD trigger/monitor/conversion/read E-Marker cable functions, ensure the PD communication switch in the lower right corner is returned to the OFF position.
• When operating at high power, the instrument's temperature may rise. Exercise caution to prevent burns.
• Do not charge the phone after triggering fast charge. The manufacturer is not responsible for any damage to the phone resulting from this action.

4. Performance Description

4.0.1 Human-computer Interaction

• 1.77-inch TFT-LCD screen
• Multi-function switch
• Touch switch

4.0.2 Voltage and Current

• Displays voltage, current, and power with up to six digits, offering a highest resolution of 0.00001 (V/A/W).
• Records minimum, maximum, and average voltage, current, and power values during operation.
• Provides 10 sets of switchable capacity, power, and time statistics.
• Includes 1 set of voltage and current curve records, supporting up to 9 hours.
• Supports low-speed waveform (voltage, current, D+, D-) drawing with sampling rates from 2sps to 100sps.
• Supports high-speed ripple (voltage, AC coupling) drawing with sampling rates up to 3.2Msps.

4.0.3 Fast Charge Trigger

• QC2.0, QC3.0 trigger.
• Huawei FCP, SCP trigger.
• Samsung AFC trigger.
• PD2.0/3.0 Trigger.
• VOOC/WARP Trigger.
• SuperVOOC Trigger.
• All above protocols support automatic monitoring.
• MTK-PE automatic detection.
• Supports QC2.0 to PD2.0 protocol conversion.
• Supports a maximum of 24-hour timed trigger, automatically disabling the trigger when the time expires.

4.0.4 Wire Identification Class

• Measures wire internal resistance using the differential pressure method.
• E-Marker Cable chip reading.
• DASH Cable data reading.

4.0.5 Miscellaneous

• Startup time recording.
• Onboard temperature measurement.
• Gravity sensor for automatic display direction switching.
• PD monitor.
• Analog DASH cable simulation.
• Apple 2.4A acceleration.

5. Structure Appearance

Device Ports and Controls:

• 1. Input Monitoring Port: USB-A, 5-PIN male.
• 2. Input Monitoring Port: TYPE-C, 24-PIN female socket.
• 3. Input Monitoring Port: Micro-USB, 5-PIN female socket.
• 4. Output Monitoring Port: TYPE-C, 24-PIN female socket.
• 5. PD Communication Switch: Controls PD communication.
• 6. Output Monitoring Port: USB-A, 5-PIN female.
• 7. Touch Switch: BACK button for cancellation/return.
• 8. Multi-function Switches: Left button, Middle button, Right button for navigation.
• 9. PC Connection Port: Micro-USB, 5-PIN female socket for PC connection.

6. Technical Index

Accuracy: ±(a% of reading + number of words)

7. Main Page

Navigation: Left/Right buttons switch pages/menus. Middle button confirms. BACK button cancels/returns. Long press BACK button to turn off the screen backlight.

7.0.1 Summary Page

Description: Displays only voltage, current, and power, indicating current direction. Display direction can be changed.

Instructions:

• Long press Left: Enter the setting menu.
• Click Middle: Switch to 6-bit resolution.
• Long press Middle: Switch screen direction (if gravity direction recognition is enabled in settings).

7.0.2 Record Page

Description: Displays boot record time and onboard temperature. Main data shows voltage, current, and power. Right side shows remaining capacity for voltage/current curves and statistics groups (capacity, power, time). Min, Max, Avg values for voltage, current, and power are shown in the lower left. Two text boxes in the lower right indicate offline recording time (highlighted when active) and energy statistics time (unit: hour; 0.0 means no time limit).

Instructions:

• Long press Left: Switch to capacity/power consumption list.
• Click Middle: Start/stop voltage and current curve recording (requires recording time > 0).
• Long press Middle: Restart calculation of Min, Max, Avg values.
• Long press Right: Enter the battery capacity calculation tool.

7.0.3 Fast Charge Recognition Page

Description: Displays boot record time and onboard temperature. Main data shows voltage, current, and power. Right side shows trigger time limit. Below trigger timing, dark blue indicates load resistance. The bottom white table shows D+/D- voltage, current charging protocol, and status (RUN/STOP/NONE). NONE indicates no fast charging protocol is triggered; RUN indicates triggering is active; specific protocol names (e.g., QC2.0) indicate a triggered protocol.

Instructions:

• Long press Left: Enter the fast charge trigger module (prompts to release if a protocol is active).
• Click Middle: Start/stop trigger timing.
• Long press Middle: Clear trigger timing.
• Long press Right: Enter the charging tool menu.

7.0.4 Curve Display Page

Description: Displays low-speed voltage/current curves, low-speed D+/D- curves, recorded offline curves, and high-speed voltage ripple (AC coupling).

Instructions:

• Long press Left: Decrease time base.
• Click Middle: Start/pause curve drawing (prompts to clear curve in mode 3).
• Long press Middle: Switch display modes.
• Long press Right: Increase time base.

7.0.5 Wire Resistance Measurement Page

Description: Measures cable internal resistance using the differential pressure method, requiring a constant current load.

Instructions:

• Click Middle: Use current voltage and current as reference values.
• Measurement Procedure:
• Connection Mode: Charger + FNB48 + Constant Current Load (adjust current to ~0.5-1A). Record reference values.
• Connection Method: Charger + Cable + FNB48 + Constant Current Load (adjust current to ~0.5-1A, similar to reference recording). The system automatically calculates cable internal resistance.

8. Record Function Expansion

8.0.1 Energy Statistics List

Description: Accessed by long-pressing the left button on the Record page. Each line shows group number, capacity, and energy. The selected group is highlighted in green. Lower left shows selected group statistics time; lower right shows the current statistics group number.

Instructions:

• Click Middle: Switch to the selected group.
• Long press Middle: Select whether to clear the selected group.

8.0.2 Battery Capacity Calculation Tool

Description: Accessed by long-pressing the right button on the Record page. Allows selection of statistics group, battery voltage, and energy conversion efficiency to calculate battery capacity. A green dot indicates the item being edited. Items are Group, BattVol (battery voltage, 3.0-5.0V, default 3.7V), and ConvEff (energy conversion efficiency, default 90%). The calculation result is displayed in red. For mAh, multiply by 1000.

Instructions:

• Click Middle: Move the green selection dot between Group, BattVol, and ConvEff.
• Left/Right buttons: Adjust the value of the selected item.

9. Quick Charge Protocol Trigger and Detection Menu

Access: Long press the left button on the Fast Charge Recognition page and confirm.

Supported Protocols: QC2.0/QC3.0, Huawei FCP/SCP, Samsung AFC, VOOC/DASH constant voltage, PD2.0/3.0, and QC2.0 to PD2.0 protocol conversion.

Note: Operate with caution. Do not connect equipment unable to withstand high voltage. The author is not liable for losses due to misoperation.

9.0.1 Fast Charge Protocol Automatic Detection

Operation: The meter attempts to trigger various protocols sequentially. Results (supported/not supported) are displayed (Green/Red). For PD chargers, restarting during testing is normal. Do not connect other equipment during testing. Key operations are unresponsive during the test; unplug to exit. Click Middle to restart, BACK to return.

9.0.2 QC2.0 Trigger

Operation: Use Left/Right keys to select trigger voltage. Press BACK to return.

9.0.3 QC3.0 Trigger

Operation: Use Left/Right keys to decrease/increase trigger voltage. Press BACK to return. Left/Right keys allow rapid voltage adjustment.

9.0.4 Huawei FCP Trigger

Operation: Same as QC2.0 trigger.

9.0.5 Huawei SCP Trigger

Operation: Same as QC3.0 trigger.

9.0.6 Samsung AFC Trigger

Operation: Same as QC2.0 trigger.

9.0.7 PD Protocol Trigger

Operation: Turn PD communication switch ON. Select trigger mode. Switch PD communication switch OFF after exiting. The display shows messages sent by the charger, with 6 gears (5 fixed voltage, 1 adjustable PPS). Use Left/Right keys to switch gears. For PPS, click Middle to select step voltage, then use Left/Right keys to adjust.

9.0.8 PD Protocol Conversion

Purpose: For QC2.0 chargers powering PD appliances. Turn PD communication switch ON. Connect PD appliances. Click Middle and use Left/Right keys to change maximum packet power (do not exceed charger's capacity). Click Middle to confirm changes. Set to 5V when no device is connected to prevent damage. The tester checks if the charger successfully triggers QC2.0-20V. Some PD appliances with dynamic D+/D- voltage changes may not be compatible.

9.0.9 VOOC/WARP Constant Voltage Trigger

Operation: Same as QC3.0 trigger.

9.0.10 SVOOC Trigger

Operation: SuperVOOC requires a load > 500mA and operates at 10.5V. Only the BACK button is available to return to the previous page.

10. Charging Tool

Access: Long press the Right button on the Fast Charge Recognition page.

Functions: PD monitor, Analog DASH cable, Read E-Marker cable, Apple 2.4A acceleration, Read DASH cable.

10.0.1 PD Listener

Setup: Turn PD communication switch ON. Use a power supply ≤ 16V (typically 5V) and a Micro-USB cable to connect to the PC. Use two C-C cables to connect the charger and PD appliance to the Type-C IN and Type-C OUT interfaces respectively. Flip C-C cable connectors if the charger is not powered.

Display: Shows captured PD protocol messages. Left column allows message selection (message number, header, type like REQ, direction like <-). Click Middle to view detailed communication process. Right column shows voltage/current info in messages. Long press Left to clear data buffer. Long press Right for quick browsing.

Note: PDCRC monitoring can be disabled in Settings -> Trigger -> Block PDCRC.

10.0.2 Read E-Marker Cable

Purpose: E-Marker chips in Type-C cables enable current > 3A for PD protocol. Without it, current is limited to 3A. Power supply can be via PC port, USB-A, or Micro-USB interfaces (Type-C interface cannot supply power). PD communication switch must be ON.

Operation: Plug the cable into any Type-C interface to read E-Marker messages (parsed or original data).

10.0.3 Read DASH Cable

Operation: Plug in the DASH cable to read chip-related data.

10.0.4 Analog DASH Cable

Purpose: Simulates a DASH cable for VOOC/WARP flash charging when a USB-A to Type-C DASH cable is unavailable. Connects the phone via a C-C cable.

Note: Charging power depends on C-C cable impedance.

10.0.5 Apple 2.4A Acceleration

Operation: Sets D+ and D- to 2.7V for Apple devices to charge at 5V-2.4A.

11. Setting Menu

Navigation: Left/Right select options, Middle confirms, BACK returns/cancels.

11.0.1 General

• Display Brightness: Set screen brightness (1-20).
• Standby Brightness: Set standby screen brightness (0-20). 0 turns off the screen in standby.
• Standby Time: Set time to enter standby mode after last button operation.
• Data Transmission: Disable to prevent PC connection.
• Temperature Symbol: Display onboard temperature in °C or °F.
• Language: Supports Chinese/English. English may display with Chinese characters due to size limitations.
• Current Change Wake Up: Set a current threshold to wake the device from standby. 0 disables this function.
• Bluetooth Switch: Disable to prevent Bluetooth data transmission.
• Gravity Direction Recognition: Enable for automatic page orientation switching. Disable to manually switch via long-pressing the middle button on the Summary page.
• Boot Page: Turn on/off the boot page display.
• Reset: Restore all settings except recorded data.

11.0.2 Record

• Curve Recording Time: Set max recording time for voltage/current curves (up to 9 hours). Setting to 'no time' clears existing curves.
• Statistical Current Threshold: Set current threshold (0-5A) for capacity, energy, and time statistics.
• Energy Statistics Time: Set time limit for energy statistics. 'No time' means no limit. Statistics stop automatically when the set time is reached.
• Clear All Records: Erase all recorded data, including offline curves and energy statistics.

11.0.3 Trigger Related Configuration

• Trigger Time: Set trigger time duration.
• Block PD CRC: Enable to mask CRC messages during PD monitoring (off by default).
• Boot Simulation DASH: Enable analog DASH cable function at boot (off by default).
• Boot Apple 2.4A: Enable Apple 2.4A acceleration at boot (off by default).

11.0.4 System

View instrument operating times, SN serial number, and software version.

12. Upgrade Firmware Instructions

Steps:

1. Open the USB Meter upgrade tool.
2. With the meter off, press and hold the Middle button while connecting to the PC via the online port. The display should show connection status, device model, and firmware version. Ensure the connection cable supports data transmission.
3. Click 'System', open the firmware file folder, select the firmware, and click 'Upgraded'. The device will restart automatically upon completion.

13. Contact Information

FNIRSI offers satisfactory solutions and an extra 6-month warranty for user inquiries. Join the FNIRSI community by contacting staff.

Shenzhen FNIRSI Technology Co., LTD.

• Address: West of Building C, Weida Industrial Park, Dalang Street, Longhua District, Shenzhen, Guangdong.
• Email (Business): fnirsiofficial@gmail.com
• Email (Equipment Service): fnirsiofficialcs@gmail.com
• Phone: 0755-83242477 / +8613536884686
• Website: www.fnirsi.cn

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