1. Entwodiksyon
The Diymore U-18 USB-C Tester is a versatile 2-in-1 device designed for monitoring USB-C power delivery, voltage, current, and other charging parameters. It features a 1.77-inch TFT color LCD screen for clear data display and supports various fast charging protocols, including PD and QC2.0/3.0. This manual provides comprehensive instructions for its safe and effective use.
Videyo 1: Plis paseview of the Diymore U-18 USB-C Tester. This video demonstrates the physical appearance and basic functionality of the device, showcasing its compact design and display.
2. Pwodwi souview
2.1 Karakteristik kle
- Ekspozisyon segondè-definisyon: 1.77-inch TFT screen shows real-time voltage, current, power, and charging data.
- Sipò pou plizyè pwotokòl: Compatible with PD and QC2.0/3.0 charging protocols.
- Mezi konplè: Monitè voltage (4-25V), current (up to 6.5A), power output, and charging protocols with ±0.1V/0.01A accuracy.
- Entèfas Customizable: Features 7 different display interfaces for various charging parameters and statistics.
- Dyagnostik Avanse: Measures wire internal resistance using the pressure difference method to evaluate charging efficiency and cable quality.
2.2 Components and Interface

Figi 1: Diagram illustrating the various ports and control buttons on the Diymore U-18 USB-C Tester. This includes the Type-C Input, Type-C Output, USB-A Input, USB-A Output, USB-HID, Micro USB Input, and the control keys (ENTER, KEY-, KEY+, PD Communication Switch, BACK Key).
The U-18 tester features multiple input/output ports and control buttons:
- Kalite C Antre: Connects to the power source (e.g., charger).
- Kalite-C Sòti: Connects to the device being charged/tested.
- USB-A Input (4V-24V): Connects to a USB-A power source.
- USB-A Output (0-6.5A): Connects to a USB-A device being charged/tested.
- USB-HID: For data communication with a computer (if supported by firmware).
- Mikwo USB Antre: For external power supply or firmware updates.
- 1.77-inch TFT Color LCD Screen: Displays all measurement data.
- (1) ENTER Key: Konfime seleksyon yo oubyen antre nan meni yo.
- (2) KEY - Key: Navigates down or decreases values.
- (3) KEY + Key: Navigates up or increases values. (Long press to toggle display orientation)
- (4) PD Communication Switch: Activates/deactivates PD communication.
- (5) BACK Key: Retounen nan ekran oswa meni anvan an.
3. Enstalasyon ak Operasyon Debaz
3.1 Konekte Tèstè a
- Identify the appropriate input port (USB-A or Type-C) on the tester based on your power source.
- Connect the power source (e.g., wall charger, power bank) to the tester's input port.
- Connect the device you wish to test (e.g., smartphone, tablet) to the tester's corresponding output port (USB-A or Type-C).
- The tester's screen should illuminate and begin displaying real-time data.
3.2 Reading Basic Measurements

Figi 2: Example of the tester's display showing various measurement data, including voltage, current, power, energy statistics, capacity statistics, and fast charging protocol information.
Upon connection, the main display will show key parameters:
- Voltage (V): The electrical potential difference.
- Kouran (A): The flow rate of electric charge.
- Pouvwa (W): The rate at which electrical energy is transferred.
- Kapasite (Ah): Accumulated charge over time.
- Energy (Wh): Accumulated energy over time.
- D+/D- Voltage: Data line voltages, useful for protocol detection.
- Pwotokòl: Indicates detected fast charging protocols (e.g., QC2.0, QC3.0, PD).
4. Fonksyon avanse
4.1 Interface Navigation and Settings

Figi 3: Various display interfaces and settings menus available on the Diymore U-18 USB-C Tester, including system settings, simple interface mode, cable measurement, and protocol detection/trigger options.
Sèvi ak la ANTRE, KEY -, KLE +, ak TOUNEN keys to navigate through different display interfaces and settings menus. A long press on the KLE + button can rotate the display orientation.
- Anviwònman sistèm: Adjust display brightness, standby time, language, and perform a factory reset.
- Simple Interface Mode: Provides a streamlined view nan done esansyèl yo.
- Ripple/Voltage/Current Curve Interface: Displays real-time graphs of voltage ak fluktuasyon aktyèl yo.
4.2 Cable Internal Resistance Measurement

Figi 4: The tester performing a wire internal resistance measurement, displaying reference voltage/current, real voltage/current, difference, and calculated cable resistance.
To measure cable internal resistance:
- Navigate to the 'Cable Measurement' interface using the navigation keys.
- Connect the power source directly to the tester's input, and then connect the cable to be tested to the tester's output.
- The tester will employ the voltage drop method to measure the resistance, automatically calculating and displaying the cable resistance value. A lower resistance indicates a more efficient cable.
4.3 Fast Charging Protocol Detection and Trigger
The tester can automatically detect and trigger various fast charging protocols. Navigate to the 'Protocol Detection/Trigger' interface to:
- Deteksyon otomatik: The tester will attempt to identify the fast charging protocol supported by the connected power source.
- Deklanchè manyèl: You can manually select and trigger specific protocols like PD, QC2.0, or QC3.0 to test compatibility and performance.
5. Espesifikasyon

Figi 5: Detailed product specifications for the Diymore U-18 USB-C Tester, including measurement ranges, resolution, and accuracy for various parameters.
| Endikatè | Range | Rezolisyon | Presizyon |
|---|---|---|---|
| Monitè Voltage | 4-24V | 0.00001V | ±(0.2%+2) |
| Siveye Kouran | 0-6.5A | 0.00001A | ±(0.5%+2) |
| Siveye pouvwa | 0-156W | 0.00001W | ±(0.5%+2) |
| D+/D- Voltage | 0-3.3V | 0.001V | ±(1.0%+2) |
| Kapasite | 0-9999.99 Ah | 0.00001Ah | - |
| Konsomasyon elektrisite | 0-9999.99Wh | 0.00001Wh | - |
| Cable Internal Resistance | 0-9999.9Ω | 0.0001Ω | - |
| Running Time of Equipment | 99 days 23:59:59 | 1 Dezyèm | - |
| Tan Dosye | 1900/2/10 15:59:59 | 1 Dezyèm | - |
Dimansyon: 3.94 x 2.56 x 0.59 pous (L x W x H)
Sous pouvwa: USB-C
Ranje Tanperati Fonksyònman: 32 ° F a 140 ° F (0 ° C a 60 ° C)
NAN. Depanaj
6.1 Display Not Lighting Up with Type-C PD

Figi 6: Visual guide for troubleshooting when the tester screen does not light up with a Type-C PD connection, showing solutions like flipping the connector or using the built-in Type-C interface.
If the tester screen does not light up when connected to a Type-C PD power source:
- Flip the Type-C connector: Type-C connectors are reversible. Try unplugging and re-inserting the connector with the opposite orientation.
- Use the built-in Type-C interface: Ensure you are using the dedicated Type-C input/output ports on the tester for PD connections.
Nòt: When the PD power supply is not connected to a fast charging device, it may not be powered by default.
6.2 Lekti ki pa egzak
- Asire w ke tout koneksyon an sekirite epi yo pa gen debri.
- Test with a different cable or power source to rule out external factors.
- Perform a factory reset via the system settings menu if persistent issues occur.
7. Enfòmasyon sou Sekirite
- Pa ekspoze aparèy la nan tanperati ekstrèm, imidite, oswa limyè solèy dirèk.
- Evite jete oswa sibi aparèy la nan gwo enpak.
- Pa eseye demonte oswa modifye aparèy la, paske sa ap anile garanti a epi li ka lakòz domaj oswa blesi.
- Kenbe soti nan atenn timoun yo.
8. Garanti ak sipò
Diymore products are designed for quality and reliability. This product comes with an 18-mwa garanti apati dat acha a. Nou ofri tou yon politik retounen 30 jou for any reason. For technical assistance or warranty claims, please contact Diymore customer support. Our team is available for Sipò kliyan 24 sou XNUMX to address any questions or concerns you may have.
Pou plis asistans, tanpri vizite Diymore Store on Amazon.