OSS U15/U16 Fast Charging Tester User Manual

1. Introduction

The OSS U15/U16 Fast Charging Tester is a high-accuracy tool designed for voltage and current detection in mobile devices. It supports multiple fast-charging protocols, including PD2.0, PD3.0, PD3.1, QC2.0, QC3.0, SCP, AFC, FCP, and VOOC, making it compatible with a wide range of modern fast-charging standards. This device features a 12800-pixel IPS true color LCD display for clear, real-time monitoring of charging data.

This manual provides detailed instructions for the safe and effective use of your U15/U16 Fast Charging Tester.

2. Safety Information

• Always handle the device with care to prevent physical damage.
• Important Warning: When triggering fast charging protocols, the instrument may output a voltage greater than 5V. To avoid burning or damaging other equipment, do not connect external devices to the tester during protocol triggering. The tester may restart several times during this process.
• Keep the device away from water, moisture, and extreme temperatures.
• Do not attempt to disassemble or modify the device. This will void the warranty and could lead to malfunction or injury.

3. Package Contents

Please check the package for the following items:

• 1 × U15 (Type-C) or U16 (USB-A) Fast Charging Tester (as selected)
• 1 × User Manual (this document)

4. Product Overview

The OSS U15/U16 Fast Charging Tester is a compact and portable device, weighing only 12g, with dimensions of 50mm x 23mm x 10mm. It features an IPS high-definition true color LCD display (160*80DPI) for clear data visualization.

4.1. Models

• U15: Type-C interface for modern devices.
• U16: USB-A interface for traditional USB ports.

Figure 1: OSS U15 (Type-C) and U16 (USB-A) Fast Charging Testers

4.2. Display Interfaces

The tester features four main function interfaces, which can be cycled through using the 'M' button. Each interface displays different parameters:

• Function Interface 1: Displays Voltage and Current.
• Function Interface 2: Displays Voltage, Current, Power, D+/D- data, and Fast Charging Protocol.
• Function Interface 3: Displays Voltage, Current, Energy Statistics (Wh), Capacity Statistics (Ah), D+/D- data, and Fast Charging Protocol.
• Function Interface 4: Protocol Trigger interface for selecting and initiating fast charging protocols (PD, QC2.0, QC3.0).

Figure 2: Multi-functional Interface Design

5. Specifications

Figure 3: Product Dimensions and Specifications

6. Setup

The OSS U15/U16 Fast Charging Tester is designed for plug-and-play operation. No complex installation is required.

1. Identify the correct model (U15 for Type-C, U16 for USB-A) for your charging setup.
2. Connect the male end of the tester to your power source (charger, power bank, etc.).
3. Connect your mobile device or other load to the female port of the tester.
4. The display will automatically light up and begin showing real-time charging data.

7. Operating Instructions

7.1. Basic Operation

1. Interface Switching: Click the 'M' key to cycle through the 1-4 function interfaces. The screen-off state is also part of this cycle.
2. Display Direction & Data Clear: In any of interfaces 1, 2, 3, or 4:
   • Long press the '-' key to quickly switch the screen display direction.
   • Long press the '+' key to clear the accumulated running time and power count.
3. Power/Time Display Toggle: In Function Interface 3, click the '+' or '-' key to switch between displaying power (Wh) and time (Ah).

7.2. Fast Charging Protocol Triggering (Interface 4)

This feature allows you to manually trigger specific fast charging protocols. Refer to the Safety Information (Section 2) before using this feature.

1. Enter Function Interface 4.
2. Click the '+' key to move the cursor and select the desired fast charging protocol (PD, QC2.0, or QC3.0).
3. Click the '-' key to initiate the triggering of the selected protocol.
4. PD Protocol Trigger:
   • After triggering PD, click '+' or '-' to switch between PD Fix files.
   • To enter PPS voltage regulation, long press the '-' key.
   • In PPS mode, click '+' or '-' to adjust the step voltage. Long press '+' to switch the step voltage.
   • If multiple PPS files are available, long press '-' to cycle through them.
   • Click the 'M' key to exit the PD protocol trigger.
5. QC2.0 Protocol Trigger:
   • After triggering QC2.0, click '+' or '-' to switch the voltage.
   • Click the 'M' key to exit the QC2.0 protocol trigger.
6. QC3.0 Protocol Trigger:
   • After triggering QC3.0, click '+' to increase the voltage by 0.2V steps.
   • Click '-' to decrease the voltage by 0.2V steps.
   • Click the 'M' key to exit the QC3.0 protocol trigger.

7.3. Setting Operating Instructions

Figure 4: Settings Menu (U15 shown, U16 similar)

1. Enter/Exit Settings: Long press the 'M' key from any interface to enter the settings menu. Long press 'M' again to exit the settings without saving changes.
2. Sleep Time:
   • In the settings menu, use '+' or '-' to move the cursor to "Sleep Time".
   • Click 'M' to cycle through sleep time options. "00" means the display will never sleep.
   • Move the cursor to "Save" and click 'M' to save your selection.
3. Display Direction:
   • In the settings menu, use '+' or '-' to move the cursor to "Display Dir".
   • Click 'M' to set the screen display direction (this is an alternative to the basic operation method).
4. Version: The "Version" option displays the current firmware version of the device.

8. User Tips

• For accurate readings, ensure a stable connection between the charger, tester, and device.
• When testing fast charging protocols, always start with the lowest voltage setting and gradually increase if needed, while monitoring the connected device.
• The compact size makes it ideal for carrying in a small bag for on-the-go testing.

9. Maintenance

• Clean the device regularly with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Store the tester in a cool, dry place when not in use.
• Avoid dropping the device or subjecting it to strong impacts.

10. Troubleshooting

10.1. No Display / Device Not Turning On

• Ensure the tester is properly connected to a working power source.
• Check if the power source itself is providing power.
• Verify that the connected device (load) is drawing current.

10.2. Incorrect Readings

• Ensure all connections are secure and free from debris.
• Try using a different cable or power source to rule out external factors.
• Clear the accumulated data by long-pressing the '+' key (see Section 7.1).

10.3. Fast Charging Protocol Not Triggering

• Ensure the charger and device both support the protocol you are trying to trigger.
• Follow the protocol triggering steps carefully (Section 7.2).
• Remember the warning about high voltage output during triggering; ensure no sensitive devices are connected.

11. Warranty and Support

For technical support, warranty inquiries, or further information, please contact the manufacturer:

Foshan Suweitong Technology Co., Ltd.
Address: Floor 6, Building 4, Nangu Zhizao City, Xinkai Road, Daliang, Shunde, Foshan, China
Telephone: 400-633-9133
Website: www.91oss.com

Please retain your proof of purchase for warranty claims.

A PDF version of this user manual is available for download from the manufacturer's website.