1.Product overview

The water meter uses photoelectric direct reading technology to read the word wheel data, compared with the traditional pulse meter, it can reduce the reading error to zero, is the automatic meter reading system in the electromechanical conversion of zero error of the electronic remote water meter, and the use of low power design, usually no power supply, only in the meter reading or valve only need to power it.

Water meter adopts rotary wing dry type metering structure, with high measuring accuracy, small starting flow, convenient meter reading, beautiful appearance, safety and health, long life and so on.

Water meter with intelligent meter reading system equipment, complete intelligent reading of the district's water, electricity, gas meter data, and realize the network data sharing with the settlement center.

2.Main technical parameters

Working voltage: DC 24 ~ 42V (MBUS communication interface)

                             DC9 ~ 15V (RS-485 communication interface);

Working current:

       MBUS communication interface ■ Meter reading operation current ≤10.0mA

                                                           ■ Static working current ≤1.5

       mA RS-485 Communication interface ■ Meter reading current ≤5.0mA

                                                                    ■ Static working current ≤1.0mA

Working environment: Water temperature: cold water 0.1℃~+45℃ Hot water 0.1℃~95℃ Humidity: 0~95%RH;

Storage temperature: -25℃~+65℃;

Maximum allowable water pressure: 1 MPa;

Maximum pressure loss: 0.063Mpa;

Communication with the host computer: M-bus field bus (or RS-485 bus);

Communication transmission rate: 1200/2400 baud;

Communication protocol: DL/T645, CJ/T 188 and internal protocol (or user specified protocol);

Maximum distance of communication transmission: 300m;

bus pin ESD protection over 10kV;

short-circuit current protection;

Provides protection against open circuit, short circuit and idle bus faults.

Flow range: see the table below

Overload flow (Q4) - The water meter is required to meet the maximum allowable error requirement for a short period of time and then to remain stable under rated operating conditions Maximum flow rate with metering characteristics;

Common flow rate (Q3) - Maximum flow rate under rated operating conditions. At this flow, the meter should work properly and meet the maximum allowable error Difference requirement;

 Demarcation traffic (Q2) - appears in common traffic Q3 and minimum flow Q Between 1, divide the traffic range into a specific maximum allowable error Poor "high zone" and "low zone" two zones flow;

 Minimum flow rate (Q1) - The minimum flow rate required for the meter to conform to the maximum allowable error. Maximum allowable error:

 The maximum allowable error from the minimum flow rate (Q1) to the low range excluding the demarcation flow rate (Q2) is ±5%;

 The maximum allowable error is ±2% in the high zone including the boundary flow rate (Q2) to the maximum flow rate (Q4).

3、installation size chart