FNIRSI FNAC-28 Multi-Port USB Tester

User Notice

This manual provides detailed instructions on how to use the product and important precautions. Please read this manual carefully and follow the instructions to ensure optimal performance of the product.

• Do not use the instrument in flammable or explosive environments.
• Used batteries and discarded instruments must not be disposed of with household waste. Please follow national or local regulations for proper disposal.
• If you encounter any quality issues with the instrument or have any questions about its use, please contact "FNIRSI" online customer service or the manufacturer. We will assist you as soon as possible.

1. Product Overview

The FNIRSI FNAC-28 USB Tester is a multifunctional USB voltage and current meter, as well as a quick charge trigger device for mobile communication terminals. It features a full-color, ultra-wide viewing angle TFT LCD display and integrates multiple interfaces, including USB-A and Type-C male and female connectors, ensuring broad compatibility. Utilizing an external 16-bit ADC chip, it offers high measurement accuracy. This device can measure the power supply or consumption of USB interfaces, phone chargers, USB drives, and other products. It can also measure phone charging power, and the input and output conditions of power banks, and perform quick charge protocol testing for chargers.

2. Panel Introduction

The FNAC-28 features several ports and controls:

Device Diagram Description: The device is a rectangular USB tester with rounded corners. It has USB-A ports labeled "IN" on both ends, allowing devices to be plugged in. On the top surface, there are two USB-A ports labeled "OUT" and a central TFT LCD screen displaying voltage (U), current (I), and power (P) readings. The sides feature a Type-C power port and a button area with three buttons: '<', 'OK', and '>'. The bottom surface has output monitoring ports: one Type-C and one USB-A.

• Input Monitoring Ports: Labeled "IN", typically USB-A ports on each end.
• Output Monitoring Ports: Labeled "OUT", including USB-A and Type-C ports on the bottom.
• Screen: A full-color TFT LCD display showing measurements.
• Type-C Power Port: Located on the side for power input.
• Button Area: Contains '<', 'OK', and '>' buttons for navigation and selection.

3. Parameter Description

4. Main Interface

Unless otherwise specified, use the '<' / '>' buttons to switch pages/menus. Press 'OK' to confirm or summon the function menu. Long press 'OK' to return to the previous interface.

4.1 Simplified Page

This page displays the three key parameters: Voltage (U), Current (I), and Power (P). Pressing the 'OK' button switches the display orientation.

4.2 Monitoring Page

This page shows detailed measurements, including timing groups, temperature, and protocol status (e.g., D+, D-). Long press the '<' or '>' button to switch to the next timing group. Long press the 'OK' button to reset the current timing group.

4.3 Waveform Page

This page displays voltage and current waveforms. Long press the '<' button to decrease the time base. Long press the '>' button to increase the time base. Click the 'OK' button to start/pause the curve. Long press the 'OK' button to switch waveform modes.

4.4 Application Page

This page allows selection of various applications:

• 01 Fast Charge
• 02 Toolbox
• 03 Settings
• Device Operating Time

5. Quick Charge Application

From the application interface, press 'OK' to enter the Quick Charge selection. A warning message will appear; read it carefully and press 'OK' to confirm.

Use the '<' / '>' buttons to select from the following quick charge protocols:

• ① Automatic Detection
• ② QC2.0 (5V, 9V, 12V, 20V)
• ③ QC3.0 (3.4-20V)
• ④ FCP (9V, 12V, 20V)
• ⑤ SCP (5.5-6.0V)
• ⑥ AFC (9V, 12V)
• ⑦ VOOC/WARP
• ⑧ SVOOC 1.0
• ⑨ SVOOC 2.0

5.1 Automatic Detection

In this mode, the instrument sequentially attempts to trigger various protocols and displays the test results on the screen. Red text indicates unsupported protocols, and green text indicates supported ones. When testing a PD charger, it is normal for the device to restart and continue detection.

Important Notes:

• Do not connect any devices to the rear end during the testing process.
• The instrument will not respond to any button operations during detection. To exit, unplug the instrument directly.
• After detection is complete, a short press of 'OK' starts detection again; a long press of 'OK' returns to the previous page.

5.2 QC2.0 Detection Page

Select QC2.0 from the Quick Charge page and press 'OK' to enter. In QC2.0 trigger mode, use '<' / '>' buttons to select the trigger voltage. Long press 'OK' to return to the previous page.

5.3 QC3.0 Detection Page

Select QC3.0 from the Quick Charge page and press 'OK' to enter. In QC3.0 trigger mode, use '<' / '>' buttons to decrease/increase the selected trigger voltage. Long press '<' / '>' buttons to quickly adjust the voltage. Long press 'OK' to return to the previous page.

5.4 FCP Trigger

The operation is the same as QC2.0 trigger.

5.5 SCP Trigger

The operation is the same as QC3.0 trigger.

5.6 AFC Trigger

The operation is the same as QC2.0 trigger.

5.7 VOOC/WARP Trigger

The operation is the same as QC3.0 trigger.

5.8 SVOOC 1.0/SVOOC 2.0 Trigger

Super VOOC requires a load of more than 500mA connected to the rear end for deception. Super VOOC only has one voltage level at 10.5V. Therefore, when entering this page, you can only press 'OK' to exit; there are no other operations.

6. Toolbox

From the application selection page, select 'Toolbox' and press 'OK' to enter. The available functions are:

• ① Cable Resistance
• ② Detect DASH Cable
• ③ Soft DASH Cable
• ④ Soft APPLE 2.4A

6.1 Cable Resistance

This function measures the internal resistance of a cable using the pressure difference method, which requires a constant current load. Click the 'OK' button to use the current voltage and current values as reference values.

Measurement Steps:

1. Connection Method 1: Charger + FNAC-28 + Constant Current Load (adjust current to around 0.5-1A). Press 'OK' to record the reference value.
2. Connection Method 2: Charger + Cable + FNAC-28 + Constant Current Load (adjust current to around 0.5-1A, close to the current recorded in step 1). The system will automatically calculate the cable resistance.

6.2 Soft APPLE 2.4A

Apple devices can only charge at 5V-2.4A when the charger's D+ and D- pins are detected as 2.7V. Activating this function sets D+ and D- to 2.7V.

7. Settings

From the application selection page, select 'Settings' and press 'OK' to enter. The available options are:

• ① System Settings
• ② Factory Reset
• ③ About

7.1 System Settings

Navigate the settings menu using '<' / '>' keys and confirm selections with a short press of 'OK'. Long press 'OK' to go back.

• Display Bright: Set screen brightness (adjustable range 1-100 levels).
• Standby Bright: Set standby screen brightness (adjustable range 0-100 levels).
• Standby Time (min): Set the standby time. The countdown starts from the last key operation. The device enters standby mode when the time is reached.
• Temperature Symbol: Choose to display onboard temperature as °C or °F.
• System Language: Select Chinese or English.
• Start Page: Turn the boot page on or off.

7.2 System Reset

Resets all data and restores factory settings.

7.3 About

View manufacturer, model, and software version information.

8. Firmware Upgrade

To upgrade the firmware:

1. Open the host software.
2. With the device powered off, press and hold the middle key, then connect it to the PC's online port using a data cable. The connection is successful when the host software main page appears on the computer.
3. Click "System" -> Click the folder -> Select firmware.
4. Click the upgrade symbol to start the firmware upgrade. After completion, the device will automatically restart and enter the main interface.

9. Precautions

• Do not connect a power source exceeding 24V to the monitoring interface.
• Do not connect a power source exceeding 16V to the PC online port.
• Only one pair of monitoring interfaces (one input port, one output port) can operate at a time. If one pair is already in use, do not connect devices to other monitoring interfaces (except for the PC online port, which can be connected to an external power source).
• When using the quick charge trigger module, do not connect devices that cannot withstand high voltage to any monitoring interface.
• Do not charge your phone immediately after quick charge triggering, as it may damage the phone. The manufacturer will not be liable for any damages caused.

10. Production Information

For any questions, FNIRSI users can contact the company for a satisfactory solution and an additional 6 months warranty. FNIRSI has also created a community for users.

Shenzhen FNIRSI Technology Co., LTD.

Address: West of Building C, Weida Industrial Park, Dalang Street, Longhua District, Shenzhen, Guangdong

E-mail: fnirsiofficial@gmail.com (Business) / fnirsiofficialcs@gmail.com (Equipment service)

Tel: 0755-28020752 / +8613536884686

Website: www.fnirsi.cn

Execution Standard: GB/T12116-2012