Multi-functional power instrument refers to the instrument used for electrical measurement and display of the power system (capable of displaying current, voltage, active and reactive power and electrical degree statistics, the input signal is generally PT, CT secondary side signal, and the output signal is 4-20mA and RS485 communication). Sometimes electrical professionals will also refer to it as a multi-function table. However, if there is no attributive, just say the multi-function meter and multi-function digital display meter, the scope will be much wider. The multi-function meter can be the measurement and monitoring of the power system, or it can be the comprehensive monitoring meter of temperature, pressure, speed, flow, etc. (the input signal is the pressure transmitter 4-20mA, thermal resistance, thermocouple, eddy current sensor, etc.). Our institute does thermal power design. The lubricating oil system also has a multi-function meter (to display the working condition of the oil pump and the oil pressure of each part), and the drum level also has a multi-function meter (electric contact input, differential pressure signal input). Therefore, it is recommended that you add an attribute to the description. If it is used in the power system, it is called multi-function power instrument to avoid ambiguity.