1、 Overview

Yihai Zhuocheng Brand OptoelectronicsDirect reading remote water meter (hereinafter referred to as direct reading remote water meter) is a self-developed direct reading remote water meter that is convenient for remote meter reading and control, designed to meet the actual needs of daily water use. It adoptsM-BUS∕RS485Bus communication enables remote direct reading of water meter usage, effectively avoiding the need for management departments to conduct on-site meter reading. This product also has valve control function (optional), which facilitates the management department to control the water usage of direct reading remote water meters, making remote meter reading and control more convenient and reliable. While saving manpower, material resources, and financial resources, it effectively improves productivity.

This direct reading remote water meter complies withGB/T778-2007 "Measurement of Water Flow in Closed Full Pipelines - Drinking Cold Water and Hot Water Meters" andCJ/T224-2012Technical requirements for electronic remote water meter. Communication protocol complianceCJ/T188-2004Technical Conditions for Data Transmission of Household Measuring Instruments orDL/T645-1997The requirements of the "Multi functional Energy Meter Communication Protocol" can also be customized according to customer needs.

2、 Performance characteristics

1. Due to the direct reading of character wheel data, compared with traditional pulse remote water meters, there is no need to set parameters such as meter base number and meter constant, and there is no cumulative reading error. The mechanical reading and electronic reading remain completely consistent, and there is no situation where the readings of the two are inconsistent due to cumulative error or water meter inversion;

2. Adopting a low-power design, power is only required for reading.

3. Adopting advanced data encoding and verification methods, the communication reliability is high.

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

5. The electronic reading device does not affect the measurement accuracy of the original instrument.

6. Each table has a unique address code, bus connection, and simple wiring.

7. The direct reading remote water meter with valve control can also remotely control the opening and closing of the water meter valve through management software.

3、 Electrical parameters

Working power supply:a)DC12V(RS485interface)、b)DC36V(MBUSinterface)；

Working environment: Temperature:0.1～+45℃ (cold water)0.1～+90℃ (hot water) Humidity:0～95%RH；

Communication interface method with the upper computer:RS-485Bus interface orMBUSBus interface;

Communication transmission rate:1200/2400/4800/9600bpsOptional;

For bus open circuit, short circuit, idle and other fault protection.

Maximum distance from table to data collector: ≤500m；

For bus open circuit, short circuit, idle and other fault protection.

Communication protocols includeDL/T645-1997AgreementCJ/T188-2004The protocol is optional and can also be customized according to needs.

4、 Main technical parameters

5、 Maximum allowable error

(1)The maximum allowable error in the low zone from including the minimum flow to excluding the boundary flow is±5%.

(II)The maximum allowable error of the cold water meter from including the boundary flow to including the maximum flow in the high zone is±2%The hot water meter is±3%.

6、 Installation

(1)Before installing the direct reading remote water meter, it is necessary to first read and record the meter address to ensure that the electronic code inside the meter is consistent with the dial serial number.

(II)The installation of direct reading remote water meters must comply withGB/T778.2Installation requirements.

(3)The diameter of the direct reading remote water meter should be determined based on the diameter of the installed pipeline and the commonly used flow rate that is less than or close to the commonly used flow rate of the direct reading remote water meter. The installation location should avoid exposure to sunlight, flooding, freezing, and pollution, and should be easy to disassemble and read.

(IV)The direct reading remote water meter must be installed horizontally, with the water flow direction consistent with the direction indicated by the arrow, and ensuring that the reading dial of the meter head is facing upwards.

(V)Before installing a new direct reading remote water meter, the sand, gravel, hemp fibers, and other debris in the pipeline should be removed first to avoid water meter malfunction.

(VI)If the water meter is installed at the inlet of the boiler, it is necessary to prevent the backflow of hot water and steam from the boiler from damaging the internal components of the water meter. It is best to install a check valve at the outlet of the water meter.

(7)Insert the meter connector into the connector nut and install it onto the pipeline. Then twist the connector nut to install the direct reading remote water meter onto the pipeline, keeping the reading dial of the direct reading remote water meter horizontal and upward. When connecting the water meter to the pipeline, excessive bending force should be avoided to avoid damaging the interface of the direct reading remote water meter and breaking it. Prohibit the installation method shown in the following figure:

7、 External dimensions

（1） Horizontal installation of direct reading remote water meter with external dimensions:

(II)Vertical installation of direct reading remote water meter with external dimensions:

(3)Horizontal installation valve controlled direct reading remote water meter with external dimensions:

matters needing attention:

1In the same system, the meter address of the direct reading remote water meter cannot be set repeatedly.

2、MbusThe two cables of the direct reading remote water meter interface do not distinguish between positive and negative polarities.

3、RS485The four cables of the direct reading remote water meter of the interface should be strictly differentiated in polarity, and should be connected separately according to different color codes when connecting.

4The wiring diagram is as follows:

8、 Precautions

（1） Regularly check the operation of the direct reading remote water meter and pay attention to antifreeze in winter.

（2） The installation location should avoid exposure to sunlight, freezing, pollution, moisture, and flooding, in order to facilitate disassembly and meter reading. During periods of freezing, in addition to wrapping the water meter and water pipe, the inlet valve of the water meter should be closed when not in use, and the outlet valve and faucet should be opened to prevent the water meter from expanding and being damaged due to freezing. It is recommended to install it in a dedicated water meter box.

（3） If the direct reading remote water meter appearsM-BUSWhen the remote meter reading data does not match the character wheel or when there is a malfunction in the direct reading remote water meter or remote transmission system, the character wheel reading on the meter dial shall prevail.

9After sales service commitment

Our company has established a dedicated customer service department with specialized technical personnel to provide you with after-sales service and technical support.

advisory service:You can answer questions about product usage at any time by phone, email, or in writing, and if necessary, send personnel to the site for service.

Repair service:Within one year of using our company's products, if the installation is reasonable and the flow rate is normal, but internal damage or malfunction (except for ice damage) is caused by manufacturing quality, our company can be responsible for repairing or replacing while maintaining the integrity of the lead seal.

10、 Attachment - Schematic diagram of wiring for photoelectric direct reading remote water meter reading system:

Note:

1Record the address code of each water meter in advance and match it with the installed room for input into the meter reading system;

2Each building is equipped with one collector, which needs to be provided220VPower Supply;

3Each collector has2Each channel should be connected to no more than one channel128A block water meter is suitable;

4The concentrator and collector communicate through（485/MBUS）Hand in hand bus connection;

5For detailed wiring, please refer to the "Bus Introduction and Wiring Strategy Explanation";

6The concentrator can be wired or wireless to the management center computerGPRSTransmission (based on actual distance).