DN15-DN40 Electronic remote water meter

This water meter is a dry direct reading water meter with clear and intuitive readings, accurate measurement, and strong anti-interference ability. Compared with traditional pulse meters, it can reduce reading errors to zero and is an electronic remote water meter with zero error in electromechanical conversion in automatic meter reading systems. It adopts a low-power design and does not require power supply normally.

Product Features

• Directly reading character wheel data can reduce reading errors to zero compared to traditional pulse meters;

• Adopting low-power design, power supply is only required for reading and valve opening and closing;

• Adopting advanced data encoding and verification techniques, high communication reliability;

• Adopting a dry structure, it has high measurement accuracy, strong reliability, and easy installation and maintenance;

• Compliant with the standard of Electronic Remote Water Meter (CJ/T 224-2012);

• The traffic performance meets the GB/T 778.1-3-2018 standard, with an accuracy level of 2;

• Compatible with multiple communication protocols; DL/T645、CJ/T188、 Internal agreements or other customer specifications;

• Combined with the upper computer system, establish a remote automatic meter reading management system to truly achieve meter reading and monitoring automation.

Technical Specifications

• Working voltage: DC9-26V (RS485); DC24-42V（M-BUS)

• Working current: 5-10mA (RS-485/M-BUS)

• Working environment: Water temperature: 0.1 ℃~+30 ℃ (cold water) 0.1 ℃~+90 ℃ (hot water)

• Humidity: 0-95% RH;

• Maximum allowable water pressure: 1 MPa;

• Maximum pressure loss: 0.063 Mpa;

• Communication method with the upper computer: a) RS-485 fieldbus; b) M-BUS fieldbus;

• Communication transmission rate: 1200/2400/4800/9600bps (optional)

• Communication protocols: CJ/T-2004 "Technical Conditions for Data Transmission of Household Instruments" by the Ministry of Construction, DLT645-2007 "Communication Protocol for Multi functional Energy Meters" by the Ministry of Electric Power, and user-defined protocols

• Maximum communication transmission distance: 1000m (non TTL)

flow parameters

Overall dimensions

wiring diagram

Installation diagram of water meter

Selection, installation, and use of water meters

1. It is recommended to determine the type, measurement characteristics, and diameter of the water meter based on the working conditions of the water supply facilities. The expected flow rate should be compatible with the Q1 to Q3 flow rates of the water meter.

2. The installation of the water meter must follow the instructions on the water meter dial: the "H" mark indicates horizontal installation, and the "V" mark indicates vertical installation. The direction of the arrow on the watch case should be consistent with the direction of water flow in the pipeline.

3. Install plugs or globe valves upstream and downstream of the water meter, and install straight pipe sections of sufficient length and the same diameter according to the requirements of U10, D5 (10DN, 5DN) to ensure accurate measurement.

If necessary, a filter can be installed between the upstream valve and the straight pipe section, and a check valve can be installed between the downstream straight pipe section and the valve.

5. It is necessary to prevent damage to the water meter caused by the impact and vibration of the surrounding environment of the installation site.

6. The water meter should avoid excessive stress caused by pipes and fittings. When necessary, the water meter should be installed on a base or bracket. The upstream and downstream water pipes should be properly fixed to ensure that no part will shift due to the pushing force of water when removing the water meter or disconnecting one side connection.

7. Necessary water meter connection length should be left for pipeline installation. When the distance between the two ends of the pipeline exceeds the length of the water meter, the pipeline spacing should be corrected to meet the length of the water meter connection. Otherwise, if the spacing is too large, forced installation will cause the threaded connection end, pipe joint, connecting nut, and connecting flange of the water meter to break and be damaged. If the spacing is too small, the water meter cannot be installed. If the pipelines at both ends 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 requirements of the water meter. Otherwise, the above phenomenon may also occur. In order to compensate for length errors during water meter installation and facilitate water meter disassembly, it is recommended to use expansion joints with corresponding diameters downstream of water meters with Q3 ≥ 16m3/h.

8. Before installation, the pipeline should be flushed to prevent debris such as stones and mud from entering the water meter.

To ensure long-term operation of the water meter, it should always be filled with water, and it is recommended that the outlet be at least 0.5m higher than the water meter.

10. Measures should be taken to prevent adverse hydraulic conditions (cavitation, surges, water hammer) from damaging the water meter.

11. Water meters should be protected from exposure to sunlight and freezing, and anti freezing measures should be taken during freezing periods. External environmental corrosion should be prevented from causing damage to the water meter.

During long-term use, water meters should be periodically calibrated according to local requirements. If there are debris, rust or other sediments blocking the water filter in the pipeline, which affects accurate measurement, it is necessary to recalibrate the water meter through a designated department. Users are not allowed to repair the water meter at will.