Valve-controlled IoT water meter NB Communication

Product Introduction

1. Overview

NB IoT IoT water meter is an intelligent water meter independently developed by our company for remote meter reading and valve control. It communicates remotely with servers through Narrowband Internet of Things (NB IoT), eliminating the need for collectors or concentrators in LoRa water meters, photoelectric direct reading water meters, and wireless remote water meter reading systems. It adopts a point-to-point connection method of one meter, one card, simplifying equipment installation work, achieving automatic remote meter reading of water meter usage, and effectively avoiding the manual work of management departments in on-site meter reading. This water meter has valve control function, which can facilitate the management department to control the water usage of the water meter, making remote meter reading and control convenient and reliable. While saving manpower, material resources and financial resources, it effectively improves production efficiency.

2. Functional features

The NB IoT water meter adopts the world's most advanced narrowband cellular network communication technology, which has advantages such as deep network coverage, wide links, and low power consumption. The communication is stable, reliable, and secure.

• NB IoT technology provides deep signal network coverage (underground meter wells, pipeline wells, etc. can all be used normally), ultra-low power consumption, and stable and reliable communication.

• Fully sealed technology: All circuits adopt IP68 sealing design, with no exposed electrodes and good sealing performance.

• Adopting telecom industrial grade SIM cards (patch type), resistant to high and low temperatures (-40 ° C to+105 ° C), vibration resistant (20HZ-2000HZ), and capable of reading and writing up to 500000 times.

• Remote reading: Proactively report readings on a periodic basis.

• Remote valve control: can remotely close and open valves.

• Warning system: Alarm prompts such as battery undervoltage and abnormal measurement.

• Ultra long life combination battery: Standard ER26500 battery+SPC1520 battery capacitor combination power supply ensures that it can be used for more than 6 years without replacement.

• Internal/External Antennas: Supports both internal and external antennas, with stable and reliable signals, achieving full coverage and no blind spots.

• High sampling accuracy: Based on our module photoelectric, Hall, reed switch, and magnetic switch sampling, the water meter remote transmission can achieve a reading accuracy of 100%.

• Recharge and payment: It can realize multi-functional payment methods such as mobile payment, remote payment at the business hall, and IC card payment.

3. Main technical indicators and functions of the product

⑴ Measurement: Identify the dual Hall signal and convert it to the corresponding measurement unit, and update the total amount of instrument usage based on the measurement quantity. Due to the use of dual Hall sampling, attacks can be detected. If an attack is detected, the status byte of the table will be set. After the attack is eliminated, automatically reset the attack bit of the table status byte;

⑵ Battery level detection: Reading data frames containing battery voltage to determine if the battery is low;

⑶ Scheduled data upload: The default upload cycle is 24 hours, and the upload frequency can be set to 6 hours, 12 hours, 24 hours, and 48 hours.;

⑷ Manual data upload: After the reed switch is triggered, upload a data frame (uploaded when leaving the reed switch);

⑸ Infrared parameter configuration: used to set basic information such as instrument address and communication parameters;

⑹ Execute valve opening and closing operations according to preset commands in the background.

⑺. You can set up upload connection platforms: Telecom testing platform, Telecom official platform, default connection to official platform.

Product and Network Composition Diagram Product Architecture Diagram

Main technical parameters

1. Electrical parameters

2. Mechanical parameters

installation dimensions

Installation and usage instructions

1. When installing a new pipeline, it is necessary to wash away sand, silt, hemp fibers, and other debris inside the pipeline before installing the meter to avoid water meter malfunction.

2. The selection of water meter specifications should be based on the commonly used flow rate, and the diameter of the water meter cannot be determined solely by the diameter of the pipeline. Water meters should not be filled with corrosive liquids, and cold water meters are prohibited from being filled with hot water.

When installing the water meter, the direction of the arrow on the case must be consistent with the direction of water flow, and the installation of the horizontal water meter must be horizontal. The water flow direction of a vertical water meter must be from bottom to top. The installation location of the water meter should be able to avoid direct sunlight and be in a place that is easy to disassemble and observe. Insulation measures should be taken during the cold winter season.

When installing a water meter at the inlet of the boiler, a check valve must be installed to prevent hot water and steam from flowing back and damaging the water meter.

5. It is strictly prohibited to place any items above the water meter. Pay attention to moisture and prevent water droplets from seeping into the water meter controller, damaging the control system and affecting normal user use.

6. When installing the water meter, pay attention to the connection length of the water meter. When the distance between the two ends of the pipeline exceeds the connection length of the water meter, the pipeline spacing should be corrected to meet the connection length of the water meter. Otherwise, if the spacing is too large and forcibly installed, it will cause the threaded end of the water meter connection to break or the pipe joint to break, as well as damage to the connecting nut; If the two end pipelines of the water meter are not on the same axis, other means should be used to correct the pipelines to be on the same axis to meet the installation size of the water meter.

7. For accurate measurement, the faucet should be higher than the water meter.

8. The water meter should not be directly connected to the pipeline. The water meter should be connected to the pipeline through a connecting pipe, sealing gasket, and connecting nut. When disassembling and assembling, do not forcefully pull it to avoid damaging the watch case.

When installing a water meter with water-saving and energy-saving features, it is necessary to use a dedicated pipe joint at the inlet to reduce the phenomenon of water meter rotation caused by water pressure fluctuations.

10. If the water meter or its accessories are damaged due to failure to strictly follow the installation precautions, all losses shall be borne by the installer.

11. For water meters with external antennas, place the external antenna above the ground to facilitate signal transmission and protect the antenna.

Maintenance of smart meters

After long-term use, errors caused by debris blockage or component wear must be repaired before use. The lead seal on the water meter must not be damaged by the user. If any abnormal phenomenon is found, the water company or management department should be notified for maintenance.

After the installation and use of the water meter, regular inspections should be carried out to check the operation of the meter and whether the battery voltage is normal.

After several years of operation, if the display screen of the water meter shows unclear data, it may be due to insufficient battery power, and the battery should be replaced immediately by specialized technicians.

If you find that the LCD (liquid crystal display screen) displays garbled characters or abnormal symbol signs, please contact the water sales department.

5. As a measuring instrument, the water meter must be regularly calibrated according to national standards, and the battery must be replaced during calibration.

Important Notice

1. Regarding the anti freezing of water meters

Normal working environment of water meterThe temperature should be above 0 ℃. Before winter arrives and in cold regions, the use and management departments of water meters must ensure that they are properly protected against freezing.

Any water meter damage, water outage, water leakage, and other related losses caused by improper installation or use of water meters or connecting nuts, pipeline rupture, water meter freezing, freezing, etc. (such as water leakage soaking floors, furniture, equipment, etc.) shall be the responsibility of the water meter manager and user, and the product supplier and manufacturer shall not bear any responsibility.

2. Regarding the issue of inconsistent display between the electronic and mechanical parts

For smart water meters with mechanical character wheel display, if the electronic part is damaged, causing the electronic part to not display or the value displayed on the mechanical character wheel to be inconsistent, according to the relevant provisions of the National Metrology Law, the calculation of usage should be based on the mechanical character wheel part of the meter.

3. Regarding the issue of negative numbers in products

When the remaining balance of the product is 0, if the valve fails to close due to foreign objects or other reasons, and the user continues to use water, the accumulated water consumption will continue to be measured normally, and the excess water will be displayed as a negative number on the "remaining balance". The next time the user purchases water with a credit card, the overdrawn amount will be automatically deducted, without causing any cost losses to the charging department. If there are individual users who have not purchased water for a long time or have abnormal average water consumption, the management department of the smart meter should promptly conduct household inspections, check the user's water usage status, and promptly identify any abnormal situations.

The supplier and manufacturer of smart meters shall not be liable for any compensation for water loss caused by the negligence of the smart meter management department in inspection and management.