DN20 STS Prepaid Water Meter Residential Building R100

 

DN20 STS prepaid water meters operate on the principle of integrating advanced technologies to accurately measure and manage water consumption. These meters are equipped with Secure Tokenization System (STS) technology, ensuring secure transactions and preventing tampering or unauthorized access. The system comprises three main components: the metering device, a user interface, and a backend management system.

 

Metering Device: The metering device, installed at each residential unit, serves as the primary interface for water measurement. It utilizes precision sensors and mechanisms to record water usage in real-time. The DN20 standard ensures compatibility and uniformity across installations, facilitating seamless integration into residential plumbing systems. STS encryption ensures data integrity and confidentiality, safeguarding against manipulation or fraud.

User Interface: Residents interact with the DN20 STS prepaid water meter through a user-friendly interface. This interface provides access to consumption data, account balance, and recharge options. Users can monitor their water usage patterns, enabling informed decisions to optimize consumption and conserve resources. The interface also facilitates token input for recharging the meter, ensuring uninterrupted access to water supply.

 

Backend Management System: A centralized backend management system oversees the operation of DN20 STS prepaid water metering networks. It collects, processes, and stores consumption data from individual meters, enabling comprehensive analysis and reporting. Integration with billing systems automates invoicing based on actual usage, promoting transparency and accuracy in utility billing. The management system also enables remote monitoring and control, allowing administrators to detect anomalies or irregularities promptly.

Benefits: The implementation of DN20 STS prepaid water metering systems offers several benefits to residential buildings and occupants:

Enhanced Accuracy: Precise measurement ensures accurate billing and equitable distribution of water resources.

 

Cost Efficiency: Prepaid functionality encourages responsible consumption, reducing water wastage and operational costs.

Transparency: Accessible consumption data fosters awareness and accountability among residents, promoting sustainable usage practices.

STS encryption and tamper-proof design mitigate risks of fraud or unauthorized access, ensuring the integrity of the metering infrastructure.

 

 

 

1.Ladder water prices can be set (not less than 10 steps), can store 50 TIDs for easy query,

2.Monthly water data can be stored and recorded for 10 years, has holiday water, overdraft, insufficient balance alarms, valve control, Token code can reset the water meter, etc. Function;

3.CIU uses LoRa wireless to issue Token codes, and the communication distance in residential areas is not less than 300 meters;

4.CIU and user STS water meters can be paired one-to-one, or the pairing can be changed;

5.LCD function display facilitates users to read meter data and recharge information.

6.Independent battery compartment, the battery is easy to replace

7.Mechanical and electrical separation design makes after-sales service more convenient.

 

 

Q3: 2.5m³

Turndown ratio: R100

Accuracy level: Class2

Temperature grade: T50

Pressure level: PN16

Pressure loss level: Δp63

Protection level: IP68

Electromagnetic environment level: E1

Installation environment level: O

Installation direction: H

Battery life: ≥6 years (26500 batteries)

 

 

1.Working frequency: 868MHz frequency band, can float up and down ±10MHz.

2. Modulation method: LoRa linear frequency modulation.

3. Power consumption: static average current <30uA, maximum power consumption during meter reading <2mA (use ER26500 lithium sub-ion battery to read the meter once a day and have a service life of not less than 6 years).

4. Power supply voltage: 3.0V~3.6V.

5. LoRa communication distance: no less than 1000 meters transmission distance (in open areas), and communication distance in residential areas no less than 300 meters.

6. Operating temperature of electrical parts: -40℃~85℃.

7. Working humidity of electrical parts: 10% ~ 90%.

8. Valve switch timeout waiting: 20 seconds.

9. Valve blocking current: ≥260mA.

10. The maximum instantaneous drive current of the valve: >800mA.

11. Pulse sampling period: 0.25 seconds.

 

 

 

 

 

1. Infrared communication: Equipped with an infrared transceiver unit, use an infrared serial port tool to read and write the meter.

2. Handheld communication: The dedicated watch mobile phone software cooperates with the LoRa antenna module to read and write the watch.

3. STS CIU communication:

    3.1. The remote control sends short code instructions to read and write the meter.

    3.2. Send the token code and receive the return information.

4. LoRa concentrator communication: issue token codes to the meters through the server, and perform read and write data operations on the designated meters.

 

 

1. Valve status indication: displays the open and closed status of the valve.

2. Battery power indication: Use percentage to indicate battery power.

3. Communication indication: When the water meter is in communication status, it indicates that it is connected.

4. Anti-tamper indication: The icon lights up when the anti-tamper alarm is triggered.

6. Magnetic attack indication: The icon lights up when a magnetic attack alarm is triggered.

7. Low balance indication: When the water consumption is greater than the set balance, the icon lights up.

8. There are corresponding fault code indications when input errors, magnetic attacks, tampering, and low voltage alarms occur.

9. The liquid crystal displays the current status of the water meter in real time (communicating, connecting status, waiting status, and constant display status)

10. Constantly displayed status: display of table serial number, remaining water volume, last recharge volume, total purchase volume, and accumulated volume.

11. When entering the token code, such as water meter reception or rejection, secret key expiration, input timeout, used, overflow, etc., all display in compliance with STS531-4, STS531-5-0, STS531-6-1-07 certification document pair display content requirements.

12. Able to read and display water meter frequency, network ID, KEN (key expiration number), KT (key type), EA (decryption algorithm), T1 (rate number), version number, date, and time.

 

 

 

1. Non-magnetic/magnetoresistive metering, use commands to switch.

2. The number of steps that can be set is no less than 10.

3. Through communication tools, the meter can be initialized (reset the water meter), and the meter serial number, meter base, working frequency, network ID, recharge water volume, step water volume, overdraft amount, alarm information, hoarding amount, and holidays can be water use, flow information, valves

Gate control, pulse equivalent, date rollover, manufacturing or repairing TID for read and write operations.

4. Monthly water consumption data (date, cumulative usage, alarm information) can be stored for 10 years.

5. Sound alarm function: The meter emits an alarm sound once the alarm is triggered.

6. The watch has a reserved upgrade port for firmware upgrades.

 

 

1. Battery voltage alarm: The low-voltage alarm function is triggered when the voltage is lower than 3V.

2. Magnetic attack alarm: When the water meter senses that the magnetic induction intensity has affected the collection and measurement, a magnetic attack alarm is triggered.

3. Anti-disassembly alarm: Adopts magnetic alarm function. When disassembly is encountered, changes in the magnetic field are detected and the alarm function is triggered.

4. Insufficient balance alarm: When the water consumption is greater than the set balance, the alarm function is triggered offline.

5. Overdraft amount alarm: The alarm function is triggered when the water consumption is greater than the set overdraft amount.

6. Flow alarm: Automatically send an alarm when continuous water consumption exceeds 24 hours; alarm when the maximum daily usage exceeds the set usage; alarm when there is continuous reverse flow.

 

 

 

 

 

 

 

 

 

 

 

 

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