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The accuracy level of a smart meter refers to the grade and level of the measuring instrument that meets certain measurement requirements and keeps the error within the specified limit. It is also an important indicator of the performance of the meter. Many users who need to buy do not know how to read it when buying a meter, and how to choose the accuracy level of the meter.
my country stipulates that meters are divided into seven levels: 0.1S, 0.2S, 0.5S, 1, 1.5, 2.5, and 5.0. The smaller the grade value, the higher the accuracy of the meter. The grades of the meters usually used are marked on the meter dial. The symbols ① or ② are marked after the value to indicate the level 1 and level 2 accuracy levels of the meter.
Common accuracy levels include 0.2S, 0.5S, and 1.
0.2S-level electric meter
It is a high-precision electric meter mainly used in power plant substations and other occasions, with an allowable error of ±0.2%. Because power plants, in addition to their own electricity consumption, mainly transmit electricity to the outside, due to high technical requirements, multi-functional smart meters and multi-functional gateway meters have emerged to meet the needs.
0.5S-level electric meter
It is mainly used for measuring electricity consumption in factories and enterprises. Because the demand for electricity in this field is large, there will be many intelligent requirements, such as valley peak level multi-period measurement, monitoring, display and storage, two-way reactive power measurement and other functions.
1-level electric meter
It has a relatively wide range of applications and is mainly used for household electricity measurement and basic commercial and industrial electricity measurement. Its accuracy level is relatively low, so industries with high accuracy requirements will choose to use 0.5S-level or above electric meters, so many brands of 1-level electric meters are mostly developed as basic metering electric meters.
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