voltage meter ampere meter 1) Range +/-19999, zero adjustment 2) 0.2%FS accuracy, RS485 ampere meter 3) CE, ISO ... certification 4 1/2 digital voltage meter & ampere meterDP4 serires Digital Panel Meter, Voltage Meter, Ampere Meter1) 8-bit micro processor ... , 5 digit LED display, range up to 19999, sampling rate 2.5 times / second, high ...