Trademarks. (Measurement license mark (CMC). Name or symbol of the measurement unit, such as: active electric energy meter is "kilowatt·hour" or "kWh"; reactive energy meter is "kilowatt·hour" or "kvarh". Wheel type meter In the window of the scale, the integer digits and decimal digits are distinguished by different colors, and there is a decimal point in the middle; if there is no decimal point, each word wheel in the window has a multiplication factor, such as ×100, ×10, ×1, etc. for the LCD screen. The integer and decimal places, there is a decimal point in the middle. The name and model of the electric energy meter. The basic current and the rated maximum current. The basic current (calibration current) is the current value that determines the relevant characteristics of the electric energy meter. It is the basic operating current of the electric energy meter. Ib means; the rated maximum current is the maximum current value that the meter can meet the accuracy specified by its manufacturing standards. For example, 1.5 (6) A means that the basic current value of the electric energy meter is 1.5A and the rated maximum current is 6A. When the rated maximum current is less than 150% of the basic current, only the basic current should be marked in front of the three-phase electric energy meter, such as 3×5 (20) A.