Walfront UM34C USB Meter Tester User Manual

1. Product Overview

The Walfront UM34C USB Meter Tester is a versatile device designed for real-time monitoring and measurement of various parameters related to USB power supply and charging. It provides detailed insights into voltage, current, power, internal resistance, temperature, and timing, making it an essential tool for evaluating charger performance, battery quality, and data cable integrity.

Figure 1: Front view of the Walfront UM34C USB Meter Tester displaying voltage and current readings.

Key features include:

• Convenient Connection: Seamlessly connects via Bluetooth to a mobile application for real-time monitoring of charging status, voltage, current, capacity, and other indicators.
• Data Cable Detection: Utilizes a voltage difference method to assess data cable quality by measuring voltage variations, helping to identify advantages and disadvantages of different cables (requires a special load).
• High-Definition Display: Features a clear screen that displays multi-function data such as voltage, current, power, internal resistance, and temperature in real-time.
• Quick Identification: Capable of identifying QC2.0 and QC3.0 fast charging protocols.
• Quality Detection: Enables identification of charger and battery quality through capacity and energy detection.

2. Physical Components and Dimensions

Figure 2: Dimensions of the UM34C tester, approximately 7cm (2.75 inches) in length and 3cm (1.18 inches) in width.

Figure 3: Rear view of the UM34C tester, highlighting the input (IN Type-C, Micro USB IN A) and output (OUT Type-C) ports, along with the ON/OFF switch.

3. Setup

To begin using your Walfront UM34C USB Meter Tester, follow these steps:

1. Power Connection: Insert the USB-A male connector of the UM34C into a USB power source (e.g., wall charger, power bank, computer USB port).
2. Device Connection: Connect the device you wish to test (e.g., smartphone, tablet, USB fan) to the appropriate output port on the UM34C (USB-A female, Type-C OUT).
3. Initial Power-On: The device should power on automatically and display readings. If not, ensure the power source is active.
4. App Download (for UM34C model): For advanced features and Bluetooth connectivity, download the official application to your mobile phone. Refer to the product packaging or manufacturer's website for QR codes or direct links to the app.
5. Bluetooth Pairing: Once the app is installed, open it and follow the in-app instructions to pair with your UM34C device via Bluetooth. Ensure Bluetooth is enabled on your mobile phone.

Figure 4: The UM34C tester in operation, monitoring a device connected to a power outlet.

4. Operating Instructions

The UM34C provides various measurement modes and display screens. Use the physical buttons on the device to navigate through different screens and functions.

4.1. On-Screen Display Navigation

The device features "PREV" and "NEXT" buttons (or similar navigation controls) to cycle through different display screens. Each screen presents specific data:

• Main Screen: Displays real-time voltage (V) and current (A).
• Capacity/Energy Screen: Shows accumulated charge capacity (mAh) and energy (mWh).
• Internal Resistance/Temperature Screen: Provides readings for internal resistance and device temperature.
• Data Cable Detection Screen: Used in conjunction with a special load to measure voltage drop across data lines (D+ and D-).
• Quick Charge Protocol Detection: Indicates detected fast charging protocols (e.g., QC2.0, QC3.0).

4.2. Using the Mobile Application (UM34C only)

The mobile application offers an enhanced user experience with graphical data representation, data logging, and remote control capabilities.

• Real-time Data: View all measured parameters simultaneously on your phone screen.
• Data Graphing: Observe trends in voltage, current, and power over time.
• Data Export: Export logged data for further analysis.
• Firmware Updates: Check for and apply firmware updates for the device via the app.

Refer to the in-app help section for detailed instructions on specific app features.

5. Maintenance

Proper maintenance ensures the longevity and accuracy of your UM34C USB Meter Tester.

• Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
• Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures. The included tin case (if applicable) provides excellent protection.
• Handling: Avoid dropping the device or subjecting it to strong impacts, as this can damage internal components or the display.
• Moisture: Keep the device away from water and high humidity. It is not waterproof.

Figure 5: The UM34C tester neatly stored in its protective tin case, ideal for safe keeping.

6. Troubleshooting

If you encounter issues with your UM34C USB Meter Tester, refer to the following common problems and solutions:

7. Specifications

The following table outlines the technical specifications for the Walfront UM34C USB Meter Tester:

8. Warranty and Support

Information regarding the specific warranty period and detailed support procedures for the Walfront UM34C USB Meter Tester is not available in the provided product data. For warranty claims, technical assistance, or further inquiries, please refer to the contact information provided with your product packaging or visit the official Walfront website.

You may also contact the seller directly through the platform where the product was purchased for support.