World Metrology Day, The Facts You Don't Know About Smart Meters

Many people have had doubts and misunderstandings about smart meters: why do they always think they "go fast"?

Does standby power consumption really not count? Today, let's answer together

Please do not believe rumors about energy metering

Electric energy meters are mandatory measuring instruments managed by the state. Before production, delivery, procurement by power supply companies, and installation to users, they must undergo multiple inspections and tests in accordance with national regulations. They go through three major checkpoints: quality control by electric energy meter production enterprises, quality inspection by power supply enterprises, and supervision by market supervision departments at all levels. None of them are indispensable, and no link can intentionally speed up the electric energy meter.

The measuring chip of the smart meter adopts a closed module, and the calibration data is written to the non erasable memory at once, and the benchmark parameters cannot be modified externally. In addition, the shell of the electric energy meter has two lead seals for factory installation and installation. Any opening operation will damage the lead seal and trigger a theft investigation.

The design of smart meters includes their own losses in the transmission losses of the public power grid, known as "line losses", which means that smart energy meters also consume electricity, but the electricity costs generated from this part are not borne by users, but by the power supply enterprise.

Smart energy meters are designed with a wide voltage range to adapt to normal fluctuations in the power grid. The amount of electricity measured by an energy meter is determined by multiple factors such as time, voltage, and current. Voltage fluctuations can cause other quantities to dynamically change, and the final recorded amount of electricity is still the actual amount used. For example, when you walk one kilometer, your speed (similar to voltage) fluctuates, but the actual distance you walk is still one kilometer, and it will not increase or decrease due to speed.

Before leaving the factory, the smart electric energy meter has undergone more than ten harsh environmental tests, including high temperature of 55 ℃, low temperature of -25 ℃, rain, dust prevention, etc., to ensure that the accuracy of its internal measuring components will not be affected by harsh outdoor weather, before it can be put on duty at your home.

The reason for replacing the energy meter. Firstly, according to the national metrological verification regulations, if the operation of an electric energy meter reaches a certain time limit, it needs to be re verified. Secondly, with the adjustment of the national electricity pricing policy, the functions of the old and outdated electricity meters can no longer effectively support the changes in the national electricity pricing policy, and it is necessary to replace the meters in a timely manner.