1Automatically identify charging and discharging, and supports bidirectional current without changing the wiring direction. 2With power-off memory function, after power-off, the AH number before power-off can be memorized, which is convenient for observation and measurement. 3The meter has protection functions such as overvoltage, overcurrent, overpower, time limit, and overcharge. 4The display screen can be turned off manually or automatically after a certain period of time, which is quick and easy. 5Used for the measurement of voltage, current, charging capacity AH number, WH number, time and power, and the display information is comprehensive and clear. Item Type: Coulomb Meter Material: ABS Type: Regulating IC Capacity Measurement Range: 0.001AH-65000.00AH Energy Measurement Range: 0.00 kWh-99999.9 WH External Power Supply Voltage Range: 6-60V Voltage Measurement: 0.01V-120V Input Current Measurement Range: 0.1A-300A 1.Voltage amplitude 2. Current amplitude 3. Volume percentage and progress bar 4. AH number (blue) power size (yellow) 5. WH number (blue) time range (yellow) 6. Protection and selection menu 7. Button How to Use:When in use, first use the "BAT" terminal connected to the power supply, the positive pole or the second battery line to charge the battery through the HALL round hole, and then check whether the jumper cap is in J3, the best to collect the battery is the "BAT" expansion board On the negative terminal plug, independent power supply (12v-60v), live. Picture 1 is a non-relay power connection mode. When in use, the "Bat" terminal is first connected to the power source, next to the line where the battery is connected to the positive load or through a hole through the HALL transformer. Then check if the jumper cap is on J4, and then connect the relay. Finally, to connect the battery cable with the terminal, use the terminal to insert it into the expansion board "Bate" and turn on the power. Figure 2 shows the wiring method of an independent power supply without a relay. When in use, first use the "BAT" terminal connected to the power supply, the positive pole or the second battery line to charge the battery through the HALL round hole, and then check whether the jumper cap is in J3, the best to collect the battery is the "BAT" expansion board On the negative terminal plug, independent power supply (12v-60v), live. Figure 3 Wiring instructions for VAC9010H power extension board When in use, the "Bat" terminal is first connected to the power supply. Secondly, use the battery as the positive pole or one of the lines and holes near the HALL transformer to load the load. To check if the jumper cap is on J3, then connect the relay. Finally, connect it to the battery terminal and use the terminal to insert the "Bate" expansion board Independent (independent power supply with connected relay voltage) and power it. 1 x Coulomb Meter1 x Connection Line 1. Please pay attention to the wiring in accordance with the schematic diagram, do not connect reversely or wrongly.2. Users need to prepare the relay by themselves, there is no relay in the standard setting.