JAMHER DC 50A 0-100V Digital Ammeter Voltmeter LED, Red Detector Voltage Current Meter Panel Amp Volt Gauge, with 50A Current Shunt, for Multimeter Amperage Meter Volt Amp Gauge Panel

• Measuring Range: Voltage measuring range: DC0-100V; current measuring range: 0-50A(decimal point move automatically)
• Shunt: Be sure to connect the shunt to measure the current, otherwise it will damage the ammeter
• Color distinction: Led Display Voltage and current simultaneously in different colors, red for Voltage and current(the current is measured in the negative rail), easy to read
• Connection Protection: With reverse connection protection to avoid burning from reverse connection
• Package Includes: 1 PC LED Voltmeter Ammeter and 1 PC 50A Current Shunt

Product Specifications: Voltage measuring range: 0.0 V - 100 V Current test range: 0A - 50 A Power supply range: DC4V-28V Voltage accuracy: ±0.1% Current accuracy: ±1% External Shunt Specification: 75 mA Working current: <20 mA Refresh Rate: Approx. 300 ms once Working temperature: -10°C ~ 65°C Questions 1： What is the reason why the current display is inaccurate? Answer 1：If it is a direct power supply or an independent power supply power supply is a common land, as long as the fine black line is disconnected, it can be accurate.  Questions 2：It is not displayed in connecting the power supply? Answer 2：Any electricity that is rectified by AC power must be filtered by an electrolytic capacitor with more than 1000UF before supplying the header. Voltmeter： The measurement current can only be chanted in the negative electrode of the power supply and the negative electrode of the load. Voltage range: The head supply voltage range of the 5 lines is 4 ~ 28V, that is, the voltage of the fine red line cannot exceed 28V. The concept of load and power supply： During discharge: battery, switching power supply, transformers are power, resistance, electric lights, motors, and power equipment are loads. During charging: charger, generator, solar energy are power supply, batteries and batteries are loads. Package Included: 1 × LED Voltmeter Ammeter. 1 × 50A Current Shunt. Notice: Please make sure that the thick black line is the negative electrode of the battery, and the rough red line receives the negative electrode of the load. (Pay attention to discharge is different from the charging wiring).