120V 50A VAC1050A Wireless Multifunction Digital LED Voltmeter Ammeter With Color DisplayHere is the manual!!!Description:VAC1100A bi-color DC voltage meter can measure DC voltage、 current、 power、 charge and discharge capacity、 watt、 time、 and other physical quantities、 parameters can be set overcurrent protection、 overvoltage protection、 undervoltage protection、 limit protection and more species protection、 the instrument is very suitable for use in electrical work process parameters voltage、 current、 watts、 etc. to monitor、 can also be used for battery charging and discharging process of monitoring capacity.1. The display can be used between the header and measurement modules wireless transmission of data、 reducing the cumbersome wiring、 but also to avoid errors caused by line losses furthest communication distance is 10 meters、 you can also use standard USB cable for wired communication 、 thanks to the 485 communication、 the length of the line can be extended to 1200 m;2. Bidirectional current detector for detecting the charging and discharging of the user can easily detect bidirectional current without changing the wiring;3. Power and memory function、 the display can be set off after the header memory before the power saving and Ah、 watts and time、 to facilitate observation and measurement、 but the measurement before the power module need to click the OK button to save parameter;4. Voltage、 current、 power、 discharge capacity、 and the time when the tile display simultaneously displays information fully clear;5. With overcurrent、 overvoltage、 undervoltage、 limit protection (extended relay time) and other functions;6. When the number of security、 and the time when the wattage clear function、 does not affect the measurement;7. Can be set up to address each individually、 and with a view to display a plurality of measurement parameters measuring board;8. The use of multiple machines simultaneously、 the machine can be set individually for each channel to avoid mutual interference;9. Wth a screen lock、 time off、 brightness adjustment and change the language display function;Wiring:1 Display power meter wiring diagramDisplay meter supply more flexible way、 we can use the provided USB extension cable connected to the measuring module、 you can put a USB extension cable to the 5V power adapter; open another display head back cover you can see a white socket also through this outlet to display meter supply、 power supply voltage DC 10-30V;2 The power supply wiring diagram and method itselfTo carry out the wiring in accordance with wiring diagram wiring on the wiring shown in as following、 the positive VIN + and load measuring boards are connected to the power of positive and negative power supply connected to the measuring board shunt left large screws ( small current can also be connected to VIN-)、 the negative electrode connected to the right end of the shunt large screw load、 but also to simultaneously jumpers on &a