Voktta USB Tester (0-3A 4-30V) Instruction Manual

1. Introduction

Thank you for choosing the Voktta USB Tester. This device is a compact and versatile digital multimeter designed for real-time monitoring of voltage, current, and power in USB-connected devices. It features an IPS high-definition color LCD display for clear readings and supports various fast charging protocols. This manual will guide you through the setup, operation, and maintenance of your USB tester to ensure accurate and reliable performance.

2. Product Overview

2.1 Key Features

Real-time Measurement: Simultaneously displays voltage, current, and power.
High-Definition Display: Features an IPS color LCD with high brightness for multi-directional viewing.
Wide Compatibility: Detects voltage and current for various power outputs and assesses the quality of USB data cables.
Fast Charging Protocol Identification: Supports identification of QC2.0 and QC3.0.
Precision Engineering: Utilizes a professional circuit scanning instrument combined with a unique precision algorithm for accurate and stable measurements.
Broad Application: Ideal for quality control of 3C digital and peripheral products with USB interfaces, connecting to laptops, mobile phones, and desktop computers.

2.2 Package Contents

1 x Voktta USB Tester

Voktta USB Tester with display showing voltage and current readings, highlighting USB interface, HD display, precise measurement, and real-time monitoring.

Image 2.2.1: The Voktta USB Tester, illustrating its dual display for current and voltage, along with key features like its USB interface and precise measurement capabilities.

Diagram showing various applications of the USB tester, including connection to a charger, power bank, mobile phone, car charger, USB cable, and computer host.

Image 2.2.2: The versatility of the USB tester, demonstrating its use with various devices such as chargers, power banks, mobile phones, and computers.

3. Setup

The Voktta USB Tester is designed for simple plug-and-play operation. No external power source or software installation is required.

3.1 Connecting the Tester

Locate the USB-A male connector on the Voktta USB Tester.
Plug the USB-A male connector into the USB output port of your power source (e.g., wall charger, power bank, computer USB port).
Connect your device (e.g., smartphone, tablet, USB fan) to the USB-A female output port(s) on the Voktta USB Tester using its charging cable.
The display on the USB tester will illuminate, showing real-time measurements.

The Voktta USB Tester connected between a wall charger and two smartphones, demonstrating its 2-in-1 charging expansion capability and dual-color HD display.

Image 3.1.1: Illustrates the connection of the USB tester between a power source and devices, showing simultaneous charging and measurement.

4. Operating Instructions

Once connected, the Voktta USB Tester automatically begins monitoring and displaying the electrical parameters.

4.1 Reading the Display

The tester features a dual-color IPS display. Typically, one color (e.g., red) indicates current (Amperes, A) and the other (e.g., blue) indicates voltage (Volts, V).
The display shows the instantaneous voltage and current being drawn by the connected device.
The device also detects power (Watts, W), which is calculated from voltage and current.

4.2 Understanding Measurements

Voltage (V): Represents the electrical potential difference. A stable voltage reading indicates a healthy power supply.
Current (A): Represents the flow of electrical charge. Higher current indicates faster charging (if supported by the device and charger).
Power (W): The rate at which electrical energy is transferred. Calculated as Voltage x Current.
QC2.0/QC3.0 Identification: The tester can identify if the connected charger and device are utilizing Quick Charge protocols, which may result in higher voltage readings (e.g., 9V, 12V) during fast charging. Note that real-time data may vary slightly due to dynamic charging conditions.

5. Maintenance

To ensure the longevity and accuracy of your Voktta USB Tester, follow these simple maintenance guidelines:

Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or solvents, as they may damage the display or internal components.
Storage: Store the tester in a cool, dry place away from direct sunlight and extreme temperatures.
Handling: Avoid dropping the device or subjecting it to strong impacts, which could affect its precision.
Moisture: Keep the device away from water and high humidity.

6. Troubleshooting

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

No Display/No Readings:
- Ensure the tester is firmly plugged into a working USB power source.
- Verify that the connected device is drawing power (e.g., charging).
- Try a different USB port or power source.
- Ensure the cable connecting your device to the tester is functional.
Inaccurate Readings:
- Ensure all connections are secure. Loose connections can lead to unstable readings.
- Test with a known good charger and cable to verify baseline accuracy.
- Note that some power sources or cables may have internal resistance affecting readings slightly.
Device Not Charging Through Tester:
- Check if the device's charging cable is properly connected to the tester's output port.
- Ensure the power source is providing sufficient power.
- Try connecting the device directly to the power source to confirm the device and cable are working.

If the problem persists, please contact Voktta customer support for further assistance.

7. Specifications

Parameter	Value
Model Number	A38GXQC0070-004
Dimensions	60 x 28 x 15 mm (2.36 x 1.10 x 0.59 inches)
Weight	22 g
Voltage Measurement Range	4 - 30 V
Voltage Resolution	0.01 V
Current Measurement Range	0 - 3 A
Current Resolution	0.01 A
Measurement Accuracy	±1%
Line Loss	Approximately 0.1 Ω
Display Type	IPS High-Definition Color LCD
Power Source	USB powered (no internal batteries required)

Table showing product parameters including size, weight, voltage, current, and measurement accuracy.

Image 7.1.1: Detailed product parameters table for the Voktta USB Tester.

Diagram illustrating the physical dimensions of the USB tester: 7.3cm length, 2.7cm width, and 1.5cm thickness.

Image 7.1.2: Physical dimensions of the Voktta USB Tester.

8. Warranty and Support

Voktta is committed to providing high-quality products and customer satisfaction. For any questions, technical support, or warranty claims regarding your USB Tester, please contact our customer service team. Please refer to your purchase documentation for specific warranty terms and contact information.

We are dedicated to assisting you with any issues you may encounter and ensuring your experience with our product is positive.

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Voktta A38GXQC0070-004