1. Introduction
The Diymore U-18 Type C USB Tester is a versatile 2-in-1 device designed for monitoring voltage, current, power, and other charging data for various USB-C and USB-A compatible devices. Featuring a 1.77-inch TFT screen, it supports multiple fast charging protocols like PD and QC2.0/3.0, making it an essential tool for evaluating charging efficiency and cable quality.
This manual provides detailed instructions on how to set up, operate, and maintain your USB tester, along with troubleshooting tips and product specifications.
2. Product Overview
The Diymore U-18 USB Tester features a compact design with multiple input/output ports and a clear display for real-time data monitoring.
2.1 Device Components and Ports
Image: Diymore U-18 USB Tester with labeled ports and buttons.
- Type-C Input/Output: For connecting USB-C devices and power sources.
- USB-A Input (4V-24V): For connecting USB-A power sources.
- USB-A Output (0-6.5A): For connecting USB-A devices.
- USB-HID: For potential data communication with a computer (if supported by firmware).
- Micro USB Input: For external power supply or data connection.
- Keys: ENTER, KEY-, KEY+, BACK for navigation and function selection.
- PD Communication Switch: For Power Delivery protocol communication.
2.2 Display Features
Image: High-definition 1.77-inch TFT LCD display.
The 1.77-inch TFT color LCD screen provides clear, real-time display of various parameters:
- Voltage (V)
- Current (A)
- Power (W)
- Capacity (Ah)
- Energy (Wh)
- Charging Protocol (QC, PD)
- D+/D- Voltage
- Internal Cable Resistance (Ω)
Image: Multiple test data indicators on the display.
2.3 Multi-Functional Interface Settings
Image: Multi-functional interface settings menu.
The tester offers 7 different display interfaces, allowing users to view various charging parameters and statistics tailored to different testing needs. These interfaces can be accessed and configured through the device's menu.
3. Setup
To begin using your Diymore U-18 USB Tester, follow these simple connection steps:
- Connect Power Source: Plug the USB-A or Type-C input of the tester into your power source (e.g., wall charger, power bank, computer USB port).
- Connect Device: Plug your device (e.g., smartphone, tablet, laptop) into the corresponding USB-A or Type-C output port of the tester.
- Monitor Display: The tester's screen will automatically light up and begin displaying real-time voltage, current, and other relevant data.
3.1 Initial Connection Troubleshooting (Type-C PD)
Image: Guide for resolving display issues with Type-C PD connections.
If the tester screen does not light up when a Type-C PD power source is plugged in:
- Try flipping the Type-C connector 180 degrees and re-inserting it.
- Ensure you are using the built-in Type-C interface for connection.
Note: When the PD power supply is not connected to a fast charging device, it may not be powered by default.
4. Operating Instructions
The Diymore U-18 USB Tester is designed for intuitive operation. Use the physical buttons to navigate through different display interfaces and access advanced functions.
4.1 Basic Operation
Once connected, the tester will automatically begin displaying real-time data. The primary display shows voltage, current, power, and charging protocol information.
4.2 Key Functions
- ENTER Key: Confirms selections or enters sub-menus.
- KEY - Key: Navigates backward or decreases values.
- KEY + Key: Navigates forward or increases values. A long press can toggle display orientation.
- BACK Key: Returns to the previous menu or screen.
4.3 Wire Internal Resistance Measurement
Image: Wire Internal Resistance Measurement in progress.
The tester can measure the internal resistance of a cable using the voltage drop method. Connect the cable to be tested through the device, and the system will automatically calculate and display the cable resistance. This feature helps evaluate cable quality and potential power loss.
4.4 Fast Charging Protocol Detection
The device automatically detects and displays supported fast charging protocols (e.g., QC2.0, QC3.0, PD) when connected to a compatible power source and device. This allows users to verify if their charger and device are communicating effectively for optimal charging speeds.
4.5 Product Demonstration Video
Video: A brief demonstration of the Diymore USB Multimeter USB C Power Tester in use, showcasing its features and display.
5. Specifications
Image: Detailed product specifications table.
| Indicator | Range | Resolution | Accuracy |
|---|---|---|---|
| Monitor Voltage | 4-25V | 0.00001V | ±(0.2%+2) |
| Monitor Current | 0-6.5A | 0.00001A | ±(0.5%+2) |
| Monitor Power | 0-156W | 0.00001W | ±(0.5%+2) |
| D+/D- Voltage | 0-3.3V | 0.001V | ±(1.0%+2) |
| Capacity | 0-9999.98Ah | 0.00001Ah | — |
| Electricity Consumption | 0-9999.99Wh | 0.00001Wh | — |
| Cable Internal Resistance | 0-9999.9Ω | 0.0001Ω | — |
| Running Time of Equipment | 99 days 23:59:59 | 1 Second | — |
| Record Time | 1900/2/10 15:59:59 | 1 Second | — |
- Power Source: USB-C
- Style: Digital LCD Display
- Color: Black
- Item Dimensions (L x W x H): 3.94 x 2.56 x 0.59 inches
- Item Weight: 1.23 ounces
- Operating Temperature Range: 32°F to 140°F (0°C to 60°C)
- Specification Met: PD3.1
6. What's in the Box
Upon opening your package, you should find the following items:
- Diymore U-18 Type C USB Power Meter Tester
- User Manual (this document)
Image: Diymore U-18 USB Tester with Type-C adapters.
7. Maintenance
To ensure the longevity and accurate performance of your Diymore U-18 USB Tester, please follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using abrasive cleaners or solvents, which can damage the screen or casing.
- Storage: Store the tester in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the device with care to prevent physical damage. Avoid dropping it or exposing it to excessive force.
- Moisture: Keep the device away from water and high humidity to prevent internal damage.
8. Troubleshooting
If you encounter issues with your Diymore U-18 USB Tester, refer to the following common problems and solutions:
- Screen Does Not Light Up:
- Ensure the power source is active and providing sufficient voltage (4V-25V).
- For Type-C connections, try flipping the connector 180 degrees.
- Verify that the device is properly seated in the input port.
- Inaccurate Readings:
- Ensure all connections are secure and free from debris.
- Test with a different cable or power source to rule out external factors.
- Perform a factory reset through the settings menu if available.
- Device Not Charging Through Tester:
- Check if the power source is delivering power.
- Ensure the device is compatible with the power source and tester.
- Some devices may require specific charging protocols; verify compatibility.
- Buttons Unresponsive:
- Ensure the device is powered on.
- Gently press the buttons to ensure proper contact.
If the problem persists after attempting these solutions, please contact customer support.
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official Diymore website. Keep your purchase receipt as proof of purchase for any warranty claims.
