DROK USB Tester Instruction Manual

1. Introduction

The DROK USB Tester is a compact and powerful digital multimeter designed to provide real-time monitoring of USB power delivery. This device allows users to accurately measure voltage, current, power, and accumulated capacity, making it an indispensable tool for diagnosing charging issues, verifying charger performance, and ensuring the health of your electronic devices.

Whether you are testing laptop chargers, power banks, or solar panels, this tester offers comprehensive data through its intuitive color LED display and multiple measurement modes. Its dual USB output ports provide flexibility for various testing scenarios, including data transfer and dedicated fast charging.

Figure 1: Two DROK USB Testers, showing their compact design and integrated USB-A input cables.

2. Key Features

• 7 Modes Display Monitor: Equipped with a digital color LED display screen, switchable between 7 display modes (VA, C, P, VA+C, VA+P, C+P, VA+C+P) to clearly see voltage, current, capacity, and power during charging.
• Dual USB Output: Features USB-A input and dual USB 2.0 output ports. Supports PD QC 3.0 fast charge protocol and auto-identifies fast charge protocols (3.6V to 12V 3A). Output I supports both device charging and data transfer, while Output II is for charging only.
• Multifunctionality: Capable of capacity checking, capacity clearing, and includes alarms for over-voltage, under-voltage, over-current, and short-circuit conditions.
• Easy to Use: Operates with a single button for switching between display modes. Simply plug in to test parameters.
• Wide Application: Suitable for devices between 3.2-30V and 0-5A, including solar panels (5V, 9V, 12V, 24V, 30V), power banks, battery chargers, and USB cables.

3. Setup

Setting up your DROK USB Tester is straightforward. Follow these steps to begin monitoring your USB devices:

1. Locate the USB-A input plug on the short cable of the DROK USB Tester.
2. Plug the USB-A input plug into the USB power source you wish to test (e.g., wall charger, power bank, computer USB port).
3. Connect your device (e.g., smartphone, tablet, camera) to either Output I or Output II port on the DROK USB Tester using its charging cable.
4. The LED display on the tester will illuminate, showing the current voltage and amperage readings.

Figure 2: The DROK USB Tester connected to a USB power source, ready to monitor a connected device.

4. Operating Instructions

The DROK USB Tester offers various display modes and dual output functionality for comprehensive testing.

4.1. Display Modes

The tester features a single button on its top surface to cycle through 7 different display modes. Short press the button to switch between modes:

• VA (Voltage & Current): Displays real-time voltage (V) and current (A).
• C (Capacity): Shows accumulated charge capacity in mAh.
• P (Power): Displays real-time power consumption in Watts (W).
• VA+C: Alternates between Voltage/Current and Capacity.
• VA+P: Alternates between Voltage/Current and Power.
• C+P: Alternates between Capacity and Power.
• VA+C+P: Cycles through Voltage/Current, Capacity, and Power.

Figure 3: Close-up view of the tester's display and the single button used to switch between measurement modes.

4.2. Dual USB Output Ports

The DROK USB Tester features two distinct output ports:

• Output I (Dual Function): This port supports both device charging and data transfer. It is suitable for connecting devices that require data communication with the power source, such as syncing a smartphone with a computer while charging.
• Output II (Charging Only): This port is designed exclusively for device charging. It incorporates an intelligent charging control IC that automatically matches the most appropriate and safest current for your devices. This port is particularly useful for non-original chargers or public charging stations where data transfer is not desired or could pose a security risk.

Figure 4: The two distinct output ports (Output I and Output II) on the DROK USB Tester.

Figure 5: Example of the DROK USB Tester simultaneously charging two smartphones, demonstrating its dual output capability.

5. Specifications

6. Maintenance

To ensure the longevity and accurate performance of your DROK USB Tester, please follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to wipe the device. Avoid using abrasive cleaners, solvents, or strong chemicals, as these can damage the display or casing.
• Storage: Store the tester in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. Keep it away from dust and corrosive substances.
• Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts, which can damage internal components or the display.
• Cable Care: Do not excessively bend or pull the integrated USB cable, as this can lead to internal wire damage.

7. Troubleshooting

The DROK USB Tester is designed with built-in alarm functions to alert you to potential issues. Familiarize yourself with these indicators:

• Over-voltage Alarm: When the input voltage is ≥ 5.6V, the voltage digital point will flash quickly. This indicates a potentially harmful voltage level for your connected device.
• Lacking-voltage Alarm: When the input voltage is ≤ 4.4V, the decimal point of the voltage is flashing very slowly. This indicates insufficient voltage for proper charging.
• Over-current Alarm: When the current is ≥ 3A, the current digital point will flash quickly. This suggests that the device is drawing too much current, which could be dangerous.
• Short-circuit Alarm: When a short circuit occurs, the current digital point will flash very quickly. Immediately disconnect the device and power source if this occurs.

If the display does not light up or shows erratic readings, ensure the USB connections are secure and the power source is functioning correctly. Try testing with a different known-good power source and USB cable.

8. Warranty and Support

DROK is committed to providing high-quality products and customer satisfaction. Each product purchased from DROK includes a one-year long period service. If there are any quality issues with your item within this period, you may be eligible for a brand new replacement.

For technical support, troubleshooting assistance, or warranty claims, please refer to the contact information provided with your product packaging or visit the official DROK website for further assistance.