1. Introduction
The POROMETISTO UT01U USB Tester is a versatile and precise DC power meter designed for monitoring and testing various USB charging devices. It provides real-time measurements of voltage, current, power, capacity, and energy, displayed on a high-definition TFT screen. This manual will guide you through the features, setup, operation, and troubleshooting of your UT01U USB Tester to ensure optimal performance and accurate data collection.
Figure 1: POROMETISTO UT01U USB Tester
2. Product Overview
2.1. Package Contents
Upon opening your package, please ensure all the following items are present:
- 1 x USB Tester Device (UT01U)
- 1 x Packing Bag
- 1 x User Manual (this document, also available as PDF: Download PDF Manual)
Figure 2: Package Contents
2.2. Device Layout and Display Elements
The UT01U USB Tester features a 1.06-inch TFT display that shows various parameters. Refer to the diagram below for a detailed breakdown of the display elements and their functions.
Figure 3: Product Parameters Diagram
| No. | Parameter | Description |
|---|---|---|
| 1 | Voltage | Measured voltage (4~30V) |
| 2 | Current | Measured current (0~6.5A) |
| 3 | Power | Calculated power (0~195W) |
| 4 | Data interface voltage | Voltage on data lines (D+/D-) |
| 5 | Capacity | Accumulated charge capacity (0~666666mAh) |
| 6 | Electricity | Accumulated energy (0~999999Wh) |
| 7 | Timing | Elapsed time of measurement (0~99 hours) |
| 8 | Current Direction Indicator | Indicates the direction of current flow |
| 9 | Record a maximum power recorded | Highest power value recorded |
| 10 | Record a maximum current measurement | Highest current value recorded |
| 11 | Record a maximum voltage at a single point | Highest voltage value recorded |
| 12 | CPU temperature | Internal CPU temperature of the tester |
| 13 | Direction of current | Visual indicator for current flow direction |
| 14 | Page curve time | Time scale for the curve recording page |
| 15 | Voltage per cell | Voltage reading per battery cell (if applicable) |
| 16 | Current per cell | Current reading per battery cell (if applicable) |
The device measures 58mm in length, 20.8mm in width, and 10.7mm in height, making it compact and portable.
Figure 4: Product Dimensions
3. Specifications
| Feature | Specification |
|---|---|
| Model | UT01U |
| Brand Name | POROMETISTO |
| Display | 1.06-inch TFT screen |
| Voltage Range | DC 4-30V |
| Current Range | 0-6.5A |
| Power Range | 0-195W |
| Capacity Range | 0-666666mAh |
| Electricity Range | 0-999999Wh |
| Timing Range | 0-99 hours |
| Interface | USB-A input and output |
| Data Record | Yes (Max Voltage, Current, Power; retains data after power failure) |
| CPU Temperature Monitoring | Yes |
| Curve Recording | Dynamic time-division |
| ADC Chip | 16-bit ADC chip for improved accuracy |
| Housing Material | CNC metal housing |
| Dimensions | 58mm * 20.8mm * 10.7mm |
| Power Supply | DC |
| Display Type | Digital Only |
| Battery Included | No |
| Certification | CE, RoHS |
4. Setup
The UT01U USB Tester is designed for plug-and-play operation. Follow these steps to begin monitoring your devices:
- Connect to Power Source: Plug the USB-A input end of the UT01U tester into a USB power source (e.g., wall charger, power bank, computer USB port). The tester's screen should light up.
- Connect Device to Test: Plug the device you wish to test (e.g., mobile phone, tablet, laptop, headphones) into the USB-A output port of the UT01U tester using its charging cable.
- Begin Monitoring: Once connected, the tester will immediately begin displaying real-time voltage, current, and power readings.
Figure 5: Applicable Scenarios for USB Tester
Figure 6: High-Precision Monitoring in Action
5. Operating Instructions
5.1. Basic Operation
The UT01U USB Tester provides real-time data on its display. Simply connect it in-line with your charging setup to view:
- Voltage (V): The electrical potential difference.
- Current (A): The flow rate of electric charge.
- Power (W): The rate at which electrical energy is transferred.
- Capacity (mAh): Accumulated charge over time.
- Electricity (Wh): Accumulated energy over time.
- Timing (h): Duration of the measurement.
- CPU Temperature: Internal temperature of the tester's processor.
Figure 7: Real-time Measurement Display
5.2. Button Functions
The UT01U features a single button on its side for various functions:
- Single Click: Changes the display page. The tester has three main display pages: real-time measurement, statistical data (max values), and curve recording interface.
- Double Click: Rotates the screen display direction by 180 degrees, useful for different viewing angles.
- Long Press (approx. 3 seconds): Clears the recorded timing, capacity, and power data. This resets the accumulated values for a new measurement cycle.
- Long Press on Curve Page: When on the curve recording page, a long press allows you to change the curve time scale. The available time scales are 5 minutes, 15 minutes, 60 minutes, and 2 hours.
Figure 8: Display Page Switching and Rotation
5.3. Capacity and Energy Recording
The UT01U supports saving accumulated capacity (mAh) and energy (Wh) values even after power failure. This allows for long-term monitoring and analysis of device charging cycles.
Figure 9: Capacity Record Feature
5.4. CPU Temperature Monitoring
The tester includes a CPU temperature monitoring feature to help prevent overcharging and potential damage to your equipment. If the CPU temperature exceeds a safe threshold (e.g., >50°C), it may indicate an issue with the charging process or the device being charged.
Figure 10: CPU Temperature Monitoring
5.5. Universal Compatibility
The UT01U is compatible with a wide range of devices and mainstream fast charging protocols, supporting both USB-A input and output for versatile testing.
Figure 11: Universal Compatibility
6. Maintenance
- Keep the device clean and dry. Avoid exposure to moisture or extreme temperatures.
- Do not attempt to disassemble or modify the device, as this will void the warranty and may cause damage.
- Store the tester in its packing bag or a protective case when not in use to prevent scratches or physical damage. The CNC metal housing provides good durability against drops.
- Use a soft, dry cloth to clean the screen and body of the tester. Avoid using abrasive cleaners or solvents.
Figure 12: Durable CNC Metal Housing
7. Troubleshooting
Frequently Asked Questions
- Question 1: Why is the product plugged in and not displayed?
- Answer: Most charging products with Type-C ports have no voltage output by default and only become active when the load protocol is detected. Ensure a device is connected to the output of the tester.
- Question 2: My product charger is marked with 10A or 120W. Why can't the test table detect 10A or 120W?
- Answer: The value tested by this product is the real-time charging parameter during the charging process. The mark on the charger indicates its maximum theoretical power output, not necessarily what is being drawn by the connected device at that moment.
- Question 3: Will the product have a current of 0.00001~0.00005A without connecting to the load during use?
- Answer: The product uses the INA226 bidirectional current and voltage acquisition chip of Texas Instruments. It is normal for a small no-load current to occur. This can be eliminated through button calibration. To calibrate: Hold the button when no load is connected, then connect a reference power supply with 5.0000V Type-C to the micro USB. Release the button when the screen shows "CAL". The product will automatically eliminate no-load current. If "CAL" does not appear, it either means the product does not require calibration or the voltage of the reference power supply is inaccurate.
8. User Tips
- For accurate capacity measurements, ensure the tester is connected for the entire charging cycle of your device.
- Utilize the screen rotation feature (double-click the button) for comfortable viewing in various orientations.
- Regularly clear the accumulated data (long press the button) before starting a new test to ensure fresh and accurate readings.
- Pay attention to the CPU temperature display, especially during prolonged high-power charging, to prevent potential overheating.
9. Warranty & Support
The POROMETISTO UT01U USB Tester is designed for reliability and performance. For any technical support or warranty inquiries, please refer to the seller's contact information or the official product page where you made your purchase. Keep your proof of purchase for warranty validation.
