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1.Measurement:single phase voltage
2.Display:single row of LED
3.Application:used in power grid,automation control system,measuring single phase voltage in the power grid
4.Extension:above AC 5A need to configure a transfomer
5.Optional configuration :Rs485 communication port,transmitting output(Dc4-20ma,DC0-20mA).alarm function for upper and lower limit,switching value in /out function.