Usually we call the number of pulses emitted by the A/D converter when measuring a kilowatt-hour by smart meter as pulse constant. For smart energy meter, this is an important constant because the number of pulses emitted by the A/D converter in a unit time will directly determine the accuracy of the meter. At present, most of the smart meters adopt the design principle of one A/D converter per household, but some manufacturers adopt the multi-user centralized smart meters which share one A/D converter, so the metering of electric energy can only be done by time-sharing queuing, which will inevitably lead to the decline of metering accuracy. This should be done in the design and selection of the smart meters. The attention should be paid.

Users with IC card to the power supply department to pay for electricity, the power supply department will use the sales management machine to write the amount of power purchased into the IC card, the user with IC card in the induction area brush contactless IC card (referred to as swipe card, the same below), you can switch power supply, power supply will be taken away after the card. When the remaining electricity in the electric meter equals to the alarm power, the pull-off power alarm (or buzzer alarm), at this time the user in the induction area can swipe the card to restore power supply; when the remaining electricity is zero, automatic pull-off power, the user must pay again with the card to restore electricity. Electronic smart meter is a high-tech product developed on the basis of electronic meter in recent years. Its composition, working principle and traditional inductive watt-hour meter are very different. And the electronic intelligent meter is mainly composed of electronic components, its working principle is first through the user supply voltage and current real-time sampling, and then the use of a dedicated electric meter integrated circuit, sampling voltage and current signal processing, and converted to the pulse output proportional to electrical energy, and finally through the single-chip microcomputer. Processing and controlling, displaying pulse as electricity consumption and output.

Why smart meters consume more electricity?

Why do smart meters consume so much electricity? In fact, it does not consume much electricity, but it is more accurate for users to use electricity.

Smart meters are much more sensitive and more accurate than mechanical energy meter, and the old mechanical meters used for a long time, a certain amount of wear and error, the old mechanical meters need a certain starting current. Now the new meters rely on pulses, and are very accurate. Household appliances stand by, plugs can go without pulling out, so residents will feel that the meters go faster than before. Previously, when some very small power appliances were used (such as: power plugs do not pull, TV standby, mobile phone charging, etc.), the meter might not go. All watt-hour meters will be inspected according to the relevant standards before installation by the State Electric Power Department. The inspections will be carried out without opening the lead seal of the manufacturer. The unqualified watt-hour meters will be returned to the manufacturer. The qualified watt-hour meters will be inspected and sealed, and then installed and used by the users. This can better ensure the use of the electric meter. Fair, accurate and reliable measurement. Therefore, residents can safely use the new smart energy meter.

In order to reduce unnecessary electricity consumption, it is suggested that when household appliances do not need to be used, the correct way to turn off the power supply, and then unplug the power plug to reduce electricity waste and power loss. It is everyone's duty to increase revenue and reduce expenditure and save electricity.