Feature: 1. Easy Calibration: This meter uses precise SMT technology for consistent performance. It includes a current calibration potentiometer and a zero adjustment potentiometer, allowing users to perform self-calibration if measurement errors occur. 2. Simple and Safe Operation: The current sensor features a through-hole design, enabling the wire to pass directly through without cutting or modifying the circuit, allowing non-invasive current measurement. 3. Isolated Design: The current sensor is fully electrically isolated from the measured wire, enabling safe measurement of current in positive, negative, or individual circuit lines. The voltage withstand capability between the measured wires is up to 2 kV. 4. Forward and Reverse Current Measurement: The ammeter measures both forward and reverse current. Positive current is displayed with the decimal point continuously on or off; negative current is indicated by a slowly flashing decimal point. 5. Wide Applications: Includes two connecting wires for easy integration into solar power systems, cars, battery-powered vehicles, and motorcycles, allowing real-time monitoring of battery charge and discharge status. Suitable for various other applications as well. Specification: Item Type: Digital Ammeter Material: ABS Current Range: 50A Test Range (0.0–50A) Resolution: 0.1A Power Supply Voltage: 4–30V (Wide Range) Note: Maximum input voltage must not exceed 30V to prevent damage Display Mode: 0.52 inch LED, Red External Dimensions: Approx. 54 x 30 x 21mm Installation Opening: Approx. 47.2 x 27.3mm Measurement Rate: 500ms per reading Measurement Accuracy: ±1% Power Supply Lead Length: Approx. 150mm Transformer Lead Length: Approx. 150mm Minimum Supply Voltage: +4.0V Maximum Supply Voltage: +30V Working Temperature: -10°C to +65°C Working Humidity: 10–80% RH (non-condensing) Operating Pressure: 80–106 kPa Sunlight Exposure: Direct exposure not allowed Calibration Method: To ensure accurate readings over time, including those affected by component aging or temperature changes, calibration can be performed as follows. Preheating the device for at least 5 minutes before calibration is recommended. Zero Calibration: With no current flowing, use a slotted screwdriver to adjust the zero potentiometer located behind the transformer until the ammeter’s decimal point flashes rapidly—this indicates optimal zero setting. Continuous light or no light suggests a positive zero offset; slow flashing indicates a negative offset. Current Calibration: Apply a known load at approximately half the full-scale current. Adjust the amplitude potentiometer on the side of the transformer until the reading matches that of a standard reference meter. For higher accuracy, repeat both zero and span calibration steps as needed. Package List: 1 x Digital Ammeter