1. Introduzione
The LiebeWH UD18L USB Tester Power Meter is a versatile and comprehensive device designed for monitoring various DC power sources and devices. It accurately measures voltage, current, capacity, energy, power, and temperature, making it an essential tool for testing power adapters, charging cables, laptops, power banks, and other USB-powered equipment.
Caratteristiche principali:
- Versatile DC Measurement: Capable of measuring various DC power sources and devices including power adapters, charging cables, laptops, power banks, and desk lamps.
- Comprehensive Power Measurements: Misura accuratamente il volumetage, current, capacity, energy, power, and temperature of various batteries and power sources.
- Advanced Charging Features: Equipped with features such as full charging shut-off, timed power off, charging timer, USB data D+ D- fast charging protocol detection, and voltage measurement display.
- Prestazioni di raffreddamento migliorate: Features a high-speed fan and an all-aluminum heat sink, along with high-current, high-voltage field effect transistors for improved overall performance and stability.
- Wide Fast Charge Compatibility: Supports multiple fast charging protocols including QC PD 2.0, 3.0, 4.0, and MTK.
2. Informazioni sulla sicurezza
Please read and understand all safety instructions before using the device. Failure to follow these instructions may result in electric shock, fire, or damage to the device or connected equipment.
- Do not disassemble or modify the device. Unauthorized modifications can lead to malfunction or safety hazards.
- Tenere il dispositivo lontano da acqua, umidità e temperature estreme.
- Ensure proper ventilation during operation, especially when testing high-power loads, to prevent overheating.
- Use the device only within its specified voltage and current ranges to avoid damage.
- Maneggiare con cura per evitare danni fisici.
3. Contenuto della confezione
Verificare che tutti gli articoli siano presenti nel pacco:
- 1 x USB Tester (UD18L)
- 1 x Manuale utente
- 1 x scatola di immagazzinaggio

Image: The LiebeWH UD18L USB Tester securely placed within its protective storage box.
4. Prodotto finitoview
The UD18L USB Tester features a color LCD display and multiple input/output ports for comprehensive testing. Familiarize yourself with the device's components:

Immagine: in alto view of the UD18L USB Tester showing its color LCD display, USB-A input, USB-A output, Type-C input, Type-C output, DC5.5 input/output, and control buttons.
- Display LCD a colori: Shows real-time measurement data.
- Ingresso USB-A: Connects to the power source (charger, power bank).
- Uscita USB-A: Connects to the device being tested (phone, laptop).
- Ingresso di tipo C: Connects to Type-C power sources.
- Uscita di tipo C: Connects to Type-C devices.
- DC5.5 Input/Output: For testing DC power sources and loads.
- Control Buttons (M, OK): Utilizzato per navigare nei menu e confermare le selezioni.
- High-Speed Fan & Heat Sink: Integrated cooling system for stable operation during high-power tests.

Immagine: Lato A view of the UD18L USB Tester, illustrating the various input and output ports including USB-A and Type-C connectors.

Immagine: Un interno view of the UD18L USB Tester, highlighting the high-speed cooling fan and aluminum heat sink designed for efficient heat dissipation.
5. Setup and Basic Connection
The UD18L USB Tester is designed for direct use. Follow these steps to begin monitoring your devices:
- Collegare la fonte di alimentazione: Plug the USB-A, Type-C, or DC5.5 input port of the UD18L tester into your power source (e.g., wall charger, power bank, laptop USB port).
- Connetti il dispositivo in prova: Plug the device you wish to test (e.g., smartphone, tablet, laptop) into the corresponding USB-A, Type-C, or DC5.5 output port of the UD18L tester.
- Accensione: Una volta collegato a una fonte di alimentazione attiva, il tester si accenderà automaticamente e visualizzerà i dati di misurazione in tempo reale.

Image: The UD18L USB Tester connected in-line, showing a USB-C charger connected to its input and a smartphone connected to its output, displaying charging parameters and temperature.
6. Istruzioni per l'uso
The UD18L provides a comprehensive display of various electrical parameters. The color LCD screen shows real-time data, and the buttons allow for navigation and function selection.

Image: A close-up of the UD18L USB Tester's color display, clearly showing real-time readings for voltage (V), current (A), power (W), and resistance (Ω).

Image: Another perspective of the UD18L USB Tester's display, providing a clear view of the detailed voltagmisurazioni di corrente, potenza e corrente.
Letture del display:
- Voltage(V): Measures the electrical potential difference.
- Corrente (A): Measures the flow of electrical charge.
- Potenza (W): Calculates the instantaneous power consumption (Voltagex Corrente).
- Capacità (mAh): Accumulates the total charge transferred over time.
- Energia (Wh): Accumulates the total energy transferred over time.
- Temperatura (°C): Measures the ambient or internal temperature (if external probe is connected).
- USB D+ / D- Voltage: Visualizza il volumetage on the USB data lines, useful for identifying fast charging protocols.
- Tempistiche: Tracks the duration of the test.
Funzioni avanzate:
- Full Charging Shut-off: Automatically stops charging when the connected device reaches full capacity.
- Spegnimento temporizzato: Allows setting a specific duration after which the power output will be cut off.
- Timer di ricarica: Monitors and displays the total charging time.
- Fast Charging Protocol Detection: Automatically identifies and displays supported fast charging protocols (e.g., QC2.0, QC3.0, PD, MTK).
- Schermo senza fili: Measurements can be displayed wirelessly on compatible enabled phones (refer to specific app instructions if applicable, not detailed in this manual).

Image: The UD18L USB Tester's display showing advanced settings and accumulated data, including charging shut-off status, timed power-off settings, and D+/D- voltage letture.
7. Specifiche
| Modello | UD18L |
| Voltage Intervallo di misurazione | 3.600-32.00 V |
| Intervallo di misurazione corrente | 0.000-5.100A |
| Accumulated Capacity Range | 0-99999mAh |
| Accumulated Power Range | 0-999.99 Wh |
| Intervallo di misurazione della potenza | 000.00-163.00 Watt |
| Campo di misurazione della temperatura | 0-80°C |
| Maximum Timing Time | 999 ore 59 minuti 59 secondi |
| USB D+ voltage Gamma | 0-2.99 V |
| USB D-Voltage Gamma | 0-2.99 V |
| Tempo di aggiornamento | >500mS/time |
| Tasso di misurazione | Circa 0.5 volte/secondo |
| Protocolli di ricarica rapida supportati | QC PD: 2.0, 3.0, 4.0, MTK |
| Volume di esercizio minimotage | 3.6 volt |
| Fonte di alimentazione | USB alimentato |
| Materiale | addominali |
8. Manutenzione
Proper maintenance ensures the longevity and accuracy of your UD18L USB Tester.
- Pulizia: Per pulire il dispositivo, utilizzare un panno morbido e asciutto. Non utilizzare detergenti liquidi o solventi.
- Magazzinaggio: Store the tester in its provided storage box in a cool, dry place when not in use. Avoid exposing it to direct sunlight or extreme temperatures.
- Ventilazione: Ensure the cooling fan and heat sink areas are free from dust and obstructions to maintain optimal performance, especially during prolonged high-power testing.
- Evitare l'impatto: Proteggere il dispositivo da cadute e urti che potrebbero danneggiare i componenti interni o il display.
9. Risoluzione Dei Problemi
If you encounter issues with your UD18L USB Tester, refer to the following common problems and solutions:
- Nessun display/dispositivo non acceso:
- Assicurarsi che la fonte di alimentazione sia attiva e fornisca una tensione sufficientetage.
- Controllare tutti i collegamenti dei cavi per assicurarsi che siano sicuri.
- Prova una porta USB o un alimentatore diverso.
- Letture imprecise:
- Ensure all connections are firm and free from debris.
- Test with a known good power source and load to verify.
- Avoid using excessively long or low-quality cables, which can introduce voltage goccia.
- Surriscaldamento:
- Ensure the device's fan and heat sink are not obstructed.
- Utilizzare il dispositivo in un'area ben ventilata.
- Reduce the load if testing at the upper limits of its power range for extended periods.
- Fast Charging Protocol Not Detected:
- Ensure both the charger and the device being charged support the specific fast charging protocol.
- Use high-quality cables that support fast charging.
Se il problema persiste, contattare l'assistenza clienti.
10. Garanzia e supporto
The LiebeWH UD18L USB Tester is covered by a manufacturer's warranty for 90 days from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical support, warranty claims, or further assistance, please refer to the contact information provided with your purchase or visit the official LiebeWH websito.