The photoelectric direct reading valve controlled water meter adopts rotor metering structure, which has the characteristics of high metering accuracy, small starting flow, convenient meter reading, beautiful appearance, safety and health, long service life and so on.
The photoelectric direct reading valve controlled water meter cooperates with the intelligent meter reading system equipment to complete the intelligent reading of the water, electricity and gas meter data of the community, and realize the network data sharing with the settlement center.
I. Product features
Directly read the spooldata. Compared with the traditional pulse meter, it can reduce the reading error to zero;
Low power consumption design is adopted, and power supply is required only when reading and valve switching;
Adopt advanced data coding and verification technology, with high communication reliability;
Rotor type metering structure is adopted, with high metering accuracy, convenient meter reading and beautiful appearance;
Compatible with multiple communication protocols; DL / T645, CJ / T188 and internal protocols;
Meet the design requirements of EMC, ESD, EMI and other electronic products, and reach the industry-leading level;
Combine with the host computer system to establish a remote automatic meter reading management system to truly realize the automation of meter reading and monitoring.
Short circuit current protection;
For bus open circuit, short circuit, idle and other fault protection.
II.Technical parameters
Product model: lxsxy-15 / 20;
Working voltage: MBus interface DC 36V; RS485 interface DC12V
Working current:
meter reading working current ≤ 2.5mA
static working current ≤ 1.3 Ma
valve on / off bus current ≤ 16 Ma
Working environment: water temperature: 0.1 ℃ ~ + 45 ℃, humidity: 0 ~ 95% RH;
Storage temperature: - 25 ℃ ~ + 65 ℃;
Maximum allowable water pressure: 1 MPa;
Maximum pressure loss: 0.063 MPa;
Valve type: motor valve;
Communication mode with host computer: M-BUS or RS485;
Communication transmission rate: 2400 baud;
Communication protocol: DL / T645 or CJ / T 188;
Maximum communication transmission distance: 300m; (communication line specification avvr2) × 0.75）
Opening / closing time of single meter valve: 15s;
ESD protection of bus pin exceeds 10kV;
III. Flow parameters
Water Meter Model | Nominal Diameter DN (mm) | Accuracy class | Overload flow Q4 | Common Flow Q3 | Boundary flow Q2 | Minimum flow Q1 |
m³/h | ||||||
LXSXY-15 | 15 | 2 | 3.125 | 2.5 | 0.050 | 0.030 |
LXSXY-20 | 20 | 2 | 5.00 | 4.0 | 0.080 | 0.050 |
IV.Installation Dimensions
Nominal diameter Length L Length L Breadth B Height H Connection threads weight Connecting line mm d D kg m DN15 258 165 85 116 R1/2 G3/4 1.4 0.8 DN20 298 195 85 116 R3/4 G1 1.7 0.8
(copper shell)
V、 Installation, use and maintenance methods
1. The installation position shall be protected from exposure, freezing, pollution, humidity and flooding for easy disassembly and meter reading. During freezing, in addition to wrapping the water meter and water pipe, close the valve at the inlet end of the water meter and open the drain valve and faucet at the outlet end when not in use, so as to prevent the water meter from being damaged due to freezing expansion. It is recommended to install it in the special water meter box;
2. The water meter shall be installed horizontally, with the word facing upward, and the arrow direction is the same as the water flow direction;
3. When installing a new pipeline, be sure to wash the stones, sediment, hemp and other sundries in the pipeline before installing a water meter, so as not to cause water meter failure.
4. In order to measure accurately, the faucet shall be higher than the water meter.
5. The water meter shall not be directly connected with the pipeline. The water meter and the pipeline shall be connected through connecting pipe, sealing washer and connecting nut. When disassembling the water meter, do not force the hard board to avoid twisting the case.
6. The water meter shall not be subjected to excessive stress caused by pipes and fittings. If necessary, the water meter shall be installed on the base or bracket.
7. Valves shall be installed before and after the water meter to facilitate maintenance and replacement.
VI、 Accessories
Each water meter is accompanied by 2 stainless steel pipe joints, connecting nuts and sealing rings, 1 certificate, and 1 product manual for each box.