1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your ATUOTIN 0.28 Inch Mini Digital Voltmeter. This compact and versatile device is designed for accurate voltage monitoring in various electrical applications, including vehicles, battery cars, and motorcycles.
2. Safety Information
Please read and understand all safety instructions before installing and operating the voltmeter. Failure to follow these instructions may result in electric shock, fire, or damage to the device or other equipment.
- Always disconnect power before making any electrical connections.
- Ensure proper wiring to prevent damage. The device features reverse polarity protection, but incorrect wiring can still cause issues in your circuit.
- Do not expose the device to direct sunlight, extreme temperatures, or high humidity.
- Keep the device away from water and other liquids.
- This product is intended for use by individuals with basic electrical knowledge. If you are unsure about any part of the installation, consult a qualified electrician.
3. Package Contents
Verify that all items are present and in good condition upon opening the package:
- 1 x ATUOTIN Mini Digital Voltmeter Monitor Panel (Green LED)
Note: The package weight is approximately 4g.
4. Specifications
| Feature | Specification |
|---|---|
| Working Voltage | DC 2.4V - 40V (with reverse connection protection) |
| Detection Voltage | DC 2.4V - 40V |
| Working Current | < 30mA |
| Display Type | 0.28" LED Digital Display (Red, Green, Blue, Yellow optional; this model is Green) |
| Measuring Speed | ≥ 200mS/times |
| Measurement Accuracy | 3% (three thousand percent) |
| Product Dimensions | 23mm x 11mm x 7mm (0.9" x 0.43" x 0.27") |
| Package Dimensions | 100mm x 60mm x 7mm (3.93" x 2.36" x 0.27") |
| Package Weight | 4g |
| Operating Temperature | -10°C to 65°C |
| Operating Humidity | 10% to 80% (non-condensation) |
| Air Pressure | 80 ~ 106kPa |
| Battery Included | No |
| Certification | NONE |
| DIY Supplies | Electrical |
Note: The voltage range of 6-24V DC mentioned in some product attributes refers to a common application range, while the device's actual working and detection voltage range is broader (2.4-40V DC).
5. Setup and Installation
The ATUOTIN Mini Digital Voltmeter is designed for hassle-free connection with just two wires. Follow these steps for installation:
- Identify Wiring: The voltmeter comes with two wires: a red wire and a black wire.
- Red Wire: Connect to the positive (+) terminal of your power source or circuit.
- Black Wire: Connect to the negative (-) terminal of your power source or circuit.
- Connect to Circuit: With two wires, the wiring is convenient and simple, and it is easy to access the internal lines of vehicle / battery car / motorcycle. Connect the red wire to the positive voltage point you wish to measure, and the black wire to the negative/ground point.
- Secure Connection: Ensure all connections are secure and insulated to prevent short circuits.
- Mounting: The compact size (23mm x 11mm x 7mm) allows for easy integration into various panels or enclosures.
6. Operating Instructions
Once properly installed, the ATUOTIN Mini Digital Voltmeter operates automatically:
- Power On: Apply power to the circuit where the voltmeter is connected. The LED display will illuminate.
- Voltage Reading: The voltmeter will immediately display the detected voltage in real-time. The 3-digit display provides precise readings with automatic decimal positioning for any voltage level within its range (2.4V to 40V DC).
- Display Brightness: The device features adaptable display brightness, allowing for clear readings in various lighting conditions.
- Multi-Purpose Testing: This voltmeter is versatile for testing a wide array of battery voltages, including 18650 cells, mobile lithium batteries, and nickel-hydrogen packs, making it ideal for motorcycle and vehicle battery monitoring.
7. Care and Maintenance
- Cleaning: Use a soft, dry cloth to clean the display and casing. Do not use abrasive cleaners or solvents.
- Storage: Store the voltmeter in a cool, dry place when not in use.
- Inspection: Periodically check the wiring for any signs of wear or damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is off | No power to the circuit; incorrect wiring; voltage outside operating range. | Check power supply. Verify red wire is connected to positive and black to negative. Ensure voltage is within 2.4V-40V DC. |
| Inaccurate reading | Loose connections; faulty power source; device malfunction. | Check all connections. Test the power source with another meter. If problem persists, contact support. |
| Display flickering | Unstable power supply; loose connection. | Ensure power supply is stable. Check and secure all wiring connections. |
9. User Tips
- When taking measurements, slight variations (1-3mm) may occur due to manual measurement.
- The actual color of the LED display may appear slightly different from product images due to variations in display settings and lighting conditions.
- The reverse polarity protection helps prevent damage if wires are accidentally swapped, but always strive for correct wiring.
10. Warranty and Support
For any questions, technical assistance, or support regarding your ATUOTIN Mini Digital Voltmeter, please contact the seller or manufacturer directly. Refer to the official user manual PDF for additional details and support information, which can be found at the following URL: User Manual (PDF).