Let me introduce the features of single-phase electronic energy meters.

1. Accurately measure both forward and reverse active electrical energy.

2. Manufactures stable-performance, low-power industrial electronic components and employs SMT technology, offering long service life and high reliability.

3. Features include meter reset, time calibration, power outage event logging, and more.

4. The meter is equipped with active power calibration pulse signals and multi-function signals.

Chengde Longzhida Intelligent Instrument & Meter Technology Co., Ltd. develops water meters that boast high-quality performance, simple installation, and comprehensive after-sales service. If you're interested, please visit our official website or feel free to call us for more information.

A three-phase watt-hour meter is used to measure the electrical energy output in a three-phase AC circuit. Depending on the wiring configuration of the measurement circuit, three-phase watt-hour meters are classified into three-phase three-wire and three-phase four-wire systems. In the three-phase four-wire system, the aluminum disc is placed in a magnetic field; the speed at which it rotates is directly proportional to the active power of the load, thereby achieving the purpose of measuring electrical energy. In the three-phase three-wire system, the three-phase three-wire watt-hour meter can measure the active power of either symmetrical or asymmetrical three-phase four-wire loads, whereas the three-phase three-wire watt-hour meter can only measure the active power of symmetrical or asymmetrical three-phase three-wire loads.

The operating principle of a three-phase, three-wire meter is essentially the same as that of a single-phase meter. A three-phase meter generates a magnetic field through current and voltage components, which simultaneously interacts with a braking torque.

When a three-phase four-wire meter is operating, the three sets of current and voltage components generate a rotating magnetic field. The total torque acting on the aluminum disc is the sum of the torques produced by these three sets of components. As a result, the speed of the aluminum disc in the magnetic field is directly proportional to the active power of the load, thereby achieving the purpose of measuring electrical energy.

Ultrasonic water meters have recently been attracting a lot of attention, but many people haven't yet mastered the correct method of using them. Below, we'll introduce the installation procedure for ultrasonic water meters.

1. Select the correct caliber for the water meter;

2. Install horizontally with the meter face up, ensuring that the arrow on the meter case points in the same direction as the water flow. The installation location should be protected from direct sunlight, flooding, freezing, and contamination, and should allow for easy disassembly and meter reading. Before installing the water meter, be sure to thoroughly flush out any debris such as sand, gravel, or hemp fibers from the pipeline to prevent meter malfunction.

3. Valves should be installed upstream and downstream of the water meter, and they must be fully open when in use.

4. Necessary straight pipe sections or their equivalent flow conditioners must be installed upstream and downstream of the water meter. The length of the upstream straight pipe section shall be no less than 10D, and the length of the downstream straight pipe section shall be no less than 5D (where D represents the nominal diameter of the water meter). In cases where swirls are caused by bends or centrifugal pumps, a flow conditioner must be installed immediately upstream of the straight pipe section.

Gas meters are measuring instruments. Reading them correctly not only allows you to interpret the numbers more intuitively but also helps you conserve resources more effectively. Below, we’ll introduce you to the proper method for reading a gas meter.

When you look at the gas meter, the three red digits on the right represent the precise reading to three decimal places. For example, in the number 00001275, the three digits 275 are the decimal portion and do not need to be read. Starting from the right, the fourth digit represents the ones place, tens place, hundreds place, thousands place, and ten-thousands place, with the unit being cubic meters.

The method for reading the gas meter is as described above—pretty simple, isn’t it? I hope it’s helpful to everyone. The products developed by Chengde Longzhida Smart Instruments & Meter Technology Co., Ltd. boast high-quality standards, are easy to install, and come with comprehensive after-sales service.

IC card water meters have long been popular in the market, but after several years of use, various problems may arise. Below, we’ll show you how to properly maintain your water meter and extend its service life.

1. A maintenance inspection should be conducted once a year to ensure the system operates properly.

2. Keep the equipment in good condition and clean; promptly report any issues to the relevant management department.

3. Before conducting the inspection, the relevant management department should be notified that the system will undergo maintenance and will therefore temporarily cease operation.

4. If any equipment is damaged, please contact our company promptly. Users must not disassemble or repair the equipment on their own; otherwise, they will be solely responsible for any resulting consequences.

5. It is recommended to replace the product every 6 years.

When installing ultrasonic heat meters, you're likely to encounter many challenges. Below, we’ve compiled the key installation points to help ensure a smoother installation process in the future.

1. Installation must be carried out under the guidance of a qualified professional.

2. Before installation, ensure that the heat meter’s exterior is undamaged and that the temperature sensor cable is free of any damage.

3. Ensure that the diameter of the installed piping matches the nominal diameter of the heat meter.

4. Ensure that the pipelines at both ends of the heat meter are aligned on the same axis (with a deviation no greater than 5 mm).

5. Ensure that the water flow direction indicated on the heat meter matches the actual flow direction.

Next, we’ll introduce the installation method for IC card water meters.

1. When the LCD screen displays “No Power,” please replace the battery, as shown in Figure 1-1.

Figure 1-1

2. When replacing the battery, lift the water meter cover upward, as shown in Figure 1-2, and you will see a small metal plate marked with “Battery Replacement Instructions.”

Figure 1-2

3. Following the instructions on the sticker, turn the screw counterclockwise (you don’t need to remove it completely). Then, pull out the metal cover—this will reveal the battery that needs to be replaced. Remove the old battery and insert a new one (“+” indicates the positive terminal, “—” indicates the negative terminal; the spring-loaded end is the negative terminal).

4. After replacing the battery, the display shows “E--5”. Then, reattach the removed metal cover and tighten the screw; the “E-5” message will disappear.

5. After replacing the battery, you must swipe the user card over the card sensing area to open the valve.

Prepaid water meters adopt a one-household-one-meter management approach, eliminating the need for manual meter reading and making management more convenient, thereby resolving the challenge of collecting fees. Smart household water meters have become indispensable smart water-measuring devices in daily life. They can flexibly record water usage, provide a more intuitive view of water consumption, and promptly remind users to pay their water bills.

Household smart water meters typically come in either 4-inch or 6-inch diameters, with prices generally around 100 yuan. Prices can vary depending on the meter’s features and specific usage requirements. Based on temperature range, smart water meters can be categorized into smart cold-water meters and smart hot-water meters. For cold-water meters, the minimum operating temperature is 0 degrees Celsius, while the maximum is 30 degrees Celsius. The market price for such meters is approximately 300 yuan, making them relatively affordable.

Our company’s prepaid water meter boasts advanced technology, simple operation, system stability, and remarkable energy-saving performance. For more details, please visit Chengde Longzhida Smart Instruments & Meter Technology Co., Ltd.

The purchase rate of IC-card smart water meters in the market is steadily increasing, yet various issues have emerged in their practical application. Among these, the most frequently raised question is: If an IC-card smart water meter displays that there is water available, but no water actually comes out—what could be the reason?

1. Check whether the filter screen is clogged. If there’s anything blocking it, clean it promptly. After reassembling, verify that the water flow is normal.

2. Place the water meter separately, away from magnetic materials. IC-card smart water meters will send a signal indicating water outage if they are affected by magnetic interference.

3. If the battery level of the IC-card smart water meter drops too low, the meter will trigger an alarm and shut off the valve to stop the water supply.

4. When the water fee on the IC card meter falls below the preset value, an alert will be triggered, and the water supply will be shut off.

5. Insert the card into the water vending machine to read it and check whether the card is functioning normally and whether the water volume has been successfully credited to the IC card.

6. When the water meter malfunctions, an error code will be displayed, and a professional repair technician will be required to resolve the issue.

There are many different types of smart water meters available on the market, and their installation and usage methods vary. Many people have installed smart water meters, but few have mastered the correct way to use them or know how to check the remaining water volume on these meters.

Next, we’ll show you how to check the remaining water volume on a smart water meter.

There are many types of smart water meters. Although some of them display the amount of water used, they don't show the remaining water balance. To conserve power, the LCD screen is normally turned off. It only lights up once an IC card is inserted into the meter, at which point it cyclically displays information such as the purchased volume, the used volume, and the remaining volume.

Chengde Longzhida Intelligent Instruments & Meter Technology Co., Ltd. develops high-end products of first-class quality with comprehensive after-sales service. We look forward to collaborating with you!