The plug-on display LEDD-01 is fit for all transmitter and converts with 4-20mA wire technique just as pressure, differential pressure, temperature, flow, PH, and so on. Customer can use the two buttons to program the zero point, span, decimal point, damping and alarm point, etc. Over or under range are displayed as a message. The integrated smart diagnostic system continuosly monitor all device functions. The programmed parameters are stored in a EEPRON and being kept in case of a power failure. The plug-on dipslay is simply plugged in between connector and socket, it is then ready for operation. The plug-on dipslay is powered by the current loop of the 4 to 20mA signal transmitter. No additional auxiliary power is required.