JUWEIAT UD24
JUWEIAT UD24 USB Power Meter Instruction Manual
Model: UD24 | Brand: JUWEIAT
Introduction
The JUWEIAT UD24 is a versatile DC 5-32V 5.1A IPS Color Screen USB Power Meter, designed to accurately measure voltage, current, power, resistance, and capacity. This digital multimeter is an essential tool for testing the speed of charger cables, the capacity of power banks, and verifying various quick charge protocols including QC 2.0, QC 3.0, and PD 2.0/3.0. It features a color display with 27 functional interface designs and offers high measurement accuracy down to 0.001.
Image: The JUWEIAT UD24 USB Power Meter, a compact black device with an IPS color screen displaying various electrical measurements. It features multiple input/output ports including USB-A, Micro USB, and Type-C.
Safety Information
- Warning: Do not remove the device casing to prevent electric shock.
- Use the device in a dry, indoor environment. Avoid exposure to moisture or extreme temperatures.
- Ensure proper connections before applying power to avoid damage to the device or connected equipment.
- Do not exceed the specified voltage and current ranges (DC 5-32V, 5.1A).
- Keep out of reach of children.
Product Overview
Components and Interfaces
Image: An exploded view of the UD24 USB Power Meter, highlighting its various ports and buttons. Key components include DC5.5 Output, Type-C Input, Micro USB Input, Functional Test Interface, USB Input, Power Supply 5-30V/NTC, USB Output, Type-C Output, Bluetooth Indicator, Function "M" and "+" button, Function "OK" and "-" button, and Power Indicator.
- IPS Color Screen: Displays real-time measurement data.
- USB Input/Output: Standard USB-A ports for connecting devices.
- Type-C Input/Output: USB Type-C ports for modern devices.
- Micro USB Input: For specific device connections.
- DC5.5 Input/Output: For DC power supply connections.
- Buttons: For navigation and function switching.
- Bluetooth Indicator: Shows Bluetooth connection status.
- External Temperature Sensor Port: For connecting an optional temperature probe.
Setup
Initial Power-On and Language Settings
- Power On: Connect the UD24 to a USB power source (e.g., charger, power bank) via its input port. The screen will light up.
- Language Change (English/Chinese):
1. Without power, press and hold the "OK" key.
2. Plug the UD24 into a USB charger to enter the background settings menu.
3. Select the first item (language setting) using the "+" or "-" keys.
4. Long press the "OK" key to exit. The English version will be displayed successfully.
Image: A four-panel diagram illustrating the process of changing the language setting on the UD24 from Chinese to English, showing button presses and screen changes.
Operating Instructions
Basic Measurement Functions
The UD24 provides real-time observation of current, voltage, power, resistance, and capacity. It features 27 functional interface designs for comprehensive data display.
Image: A collage of various display screens on the UD24, showing different measurement interfaces such as startup screen, 6-digit high-precision interface, USB Meter display, DC Meter display, battery percentage, large font display, current voltage curve, D+ D- curve, QC2.0/QC3.0 trigger, USB quick charge automatic detection, full power cut off, and various protection indicators (TC, Over-C, Low-V, Over-V).
- Switching Interfaces: Press the "M" button to cycle through different measurement interfaces and data displays.
- Real-time Data: The screen continuously updates with voltage (Vol), current (Cur), power (Pwr), resistance (Res), energy (Ene), and capacity (Cap) readings.
- Bidirectional Current Charging Detection: The UD24 can measure both positive and negative currents. The output can also be used as an input. The Type-C port can be plugged into a charger or used on a mobile phone. It can be reversed.
Image: The UD24 connected to a power strip, measuring the charging of two smartphones, demonstrating its bidirectional current detection capability.
- Quick Charge Protocol Detection: Automatically detects QC3.0/2.0 and supports PD fast charge.
Image: The UD24 connected to multiple chargers, displaying the detection of QC 2.0 and QC 3.0 quick charge protocols.
- Battery Power Percentage: Displays the estimated battery power percentage, helping to avoid overcharge and overdischarge.
Image: The UD24 displaying battery power percentage on its screen, with visual indicators for different charge levels (Green for >80%, Yellow for 25%, Red for <9%).
- Line Resistance Measurement: Supports Android/Type-C cable resistance detection.
- Battery Internal Resistance Detection:
To measure, first measure the current battery no-load voltage, then add the output load. The internal resistance is calculated as (no-load voltage - loaded voltage) / current.
Image: A two-part diagram showing the UD24 connected to measure line resistance (top) and battery internal resistance (bottom), illustrating the connection methods and the calculation principle.
- External Temperature Sensor: Allows for temperature measurement of various chargers, power banks, mobile phones, or ambient temperature.
- APP Connectivity: The tester can connect to a mobile phone APP to transmit and view charging status, measurement data, and graphs.
Image: The UD24 connected wirelessly to a laptop and two smartphones, demonstrating its ability to transmit data to a mobile application for detailed analysis and graphing.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the UD24 in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the device with care to avoid dropping or physical damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | No power source or faulty connection. | Ensure the UD24 is properly connected to a working USB power source. Try a different cable or power adapter. |
| Readings appear inaccurate. | Incorrect connection, faulty cable, or device limits exceeded. | Verify all connections are secure. Try a different cable. Ensure the voltage/current is within the specified range (5-32V, 5.1A). |
| Bluetooth APP not connecting. | Bluetooth not enabled, APP issue, or compatibility problem. | Ensure Bluetooth is enabled on your mobile device. Restart the APP and the UD24. Check for APP updates. Note: Some users have reported issues with the Android APP. |
| Screen is blank or frozen. | Temporary software glitch. | Disconnect the device from power, wait a few seconds, then reconnect. |
Specifications
| Parameter | Value |
|---|---|
| Model Number | UD24 |
| Voltage Measurement Range | 5V-32V |
| Current Measurement Range | 0.00-5.10A |
| Timing Measurement Range | 999 hours 59 minutes 59 seconds |
| Input Interface | Type-C / Micro USB / USB |
| Output Interface | Type-C / USB |
| USB D+ Voltage Range | 0V-2.99V |
| USB D- Voltage Range | 0V-2.99V |
| Refresh Time | > 500mS/times |
| Measurement Rate | About 0.5 times/sec |
| Alarm Mode | Siren sound + display prompt double warning |
| Self-consumption Current | <0.02A |
| Working Temperature | -10 to +60°C |
| Working Humidity | 10-80% (no doubt) |
| Working Pressure | 80-106kPa |
| Product Dimensions | 5.04 x 2.36 x 0.63 inches |
| Item Weight | 120 Grams (4.23 ounces) |
Image: A diagram showing the technical parameters of the UD24, including voltage/current ranges, timing, input/output interfaces, and environmental conditions. Below it, a detailed illustration of the product dimensions (length, width, height) in millimeters.
Warranty and Support
Specific warranty information for the JUWEIAT UD24 is not provided in this manual. Please refer to the product packaging or the manufacturer's official website for detailed warranty terms and conditions. For technical support, please contact JUWEIAT customer service through their official channels.