Ultrasonic heat meter*********

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1、 Overview

Ultrasonic calorimeter is an instrument used to measure and display the heat released (absorbed) by a heat (cold) liquid flowing through a heat and cold exchange system.

The ultrasonic heat meter consists of a controller and a base meter. The controller consists of a flow sensor, a microprocessor, and a paired temperature sensor. The microprocessor obtains flow signals through flow sensors and base meters, obtains outlet and inlet water temperature signals from temperature sensors, and calculates the energy exchanged by the system based on the standard heat calculation formula.

Users can choose an ultrasonic heat meter with M-BUS communication function, which can communicate with other devices through the M-BUS bus to form a remote meter reading management system; Ultrasonic heat meters with wireless communication capabilities can also be used, which can communicate through PDA or other wireless devices to form a remote meter reading management system; The management department can access the data in the table at any time to facilitate the control of users' heat consumption.

The ultrasonic heat meter is a high-performance, low-power electronic heat meter developed and designed with reference to European standards EN1434 and OIML-R75 international regulations. Complies with the CJ128-2007 "Heat Meter" product standard issued by the Ministry of Construction of China. M-BUS or wireless remote communication protocol complies with CJ/T128-2004.

2、 Characteristics

1. Low voltage alarm.

2. Automatic data correction technology.

3. Temperature sensor open circuit and short circuit alarm.

4. High definition wide temperature LCD display.

5. The flow is calibrated in 8 segments with high accuracy.

6. Ultra low power consumption (static power consumption less than 7uA).

7. The pipe section is a straight through integrated structure manufactured using forging technology.

8. The measuring mechanism has no moving parts, no wear and tear, and the measurement accuracy is not affected by the service life.

9. Equipped with photoelectric interface, communication distance of more than 2 meters, and infrared tools can be used to achieve meter reading.

10. Installation is extremely convenient, installed horizontally or vertically.

11. M-BUS or wireless remote communication can be used, with a long communication distance.

3、 Usage method

1. When there is flow, the heat meter will cycle and display:

Accumulated heat:^accumulateXXX kWh

Accumulated traffic:^accumulateXXX. XX meq \ \ o (\ \ s \ up 5 (3)\ \\ do 2()) 3

Instantaneous flow rate:^{instantaneous}Xxx.xxx m³/h

Temperature: XX. X^{Entrance and exit}XX.X ℃

Temperature difference:^{Temperature difference}x.x ℃

Accumulated working time:^accumulateXXX h

2. When there is no flow, the heat meter often displays:

Accumulated heat:^accumulateXXX kWh

3. M-bus communication

Users can choose M-bus communication function ultrasonic heat meters, which can be remotely read with collectors, concentrators, management software, etc. The collector has a carrying capacity of no less than 64 heat meters. Before use, an address file is established on the upper computer, and the table address is set at the factory (the 12 digit code of the ultrasonic heat meter production serial number ID). After the centralized meter reading system composed of the heat meter, concentrator, collector, upper computer, etc. is completed, the management department can read the data in the table at any time.

Note: 1. In a system, the address of the heat meter cannot be duplicated.

2. The M-BUS communication line of the heat meter does not distinguish between positive and negative poles, and can be connected to the collector interface through the M-BUS bus.

4. Data query

The ultrasonic heat meter stores the monthly usage heat and flow rate for the past 18 months. Gently shake the magnet near the production serial number of the ultrasonic heat meter, and the heat meter will display:

Version number: No.XXXX

Year, Month, Day: XX-XX-XX

Hour, minute, second: XX.XX.XX

Current time year and month:

XX-XX^{Current monthly heat usage:}accumulate

XXX kWh^{Current monthly traffic usage:}accumulate

XXX. XX meq \ \ o (\ \ s \ up 5 (3)\ \\ do 2()) 3

Last month year and month: XX-XX^{Last month's heat usage:}accumulate

XXX kWh^{Last month's traffic usage:}accumulate

XXX. XX meq \ \ o (\ \ s \ up 5 (3)\ \\ do 2()) 3

Last February Time Year/Month: XX-XX^{Heat usage in February:}accumulate

XXX kWh^{Last February's usage of data:}accumulate

XXX. XX meq \ \ o (\ \ s \ up 5 (3)\ \\ do 2()) 3

．．．．．． ．．．．．．

Last 17 months Year and Month: XX-XX^{Last month's heat usage:}accumulate

XXX kWh^{Last month's traffic usage:}accumulate

XXX. XX meq \ \ o (\ \ s \ up 5 (3)\ \\ do 2()) 3

After 18 months of monthly heat usage, the monthly flow rate is displayed in a cyclic manner and enters a normal state for display.

4、 Work status

Due to the different resolution requirements and normal working conditions required for ultrasonic heat meters during calibration, our company's ultrasonic heat meters have two working states: calibration state and normal working state. The difference between the two working states is the display resolution.

The ultrasonic heat meter can be entered into the inspection state using the "inspection state startup card". Gently shake the left end of the transparent window of the "Check Status Start Card" against the production serial number of the ultrasonic heat meter, align the "Check Status Start Card" with the infrared interface of the ultrasonic heat meter, press the button, and the communication is successful. The heat meter enters the check status, and automatically enters the normal status after 4096S.

2 ()) 3

pressure resistance

ERR8

ERR9

Temperature measurement error

PT1000 disconnection, open circuit, etc

Check hardware

7、 Installation

1. Installation of the entire meter:

(1) Suggest installing a filter before the ultrasonic heat meter.

(2) It is recommended to install a valve before the filter to facilitate maintenance and cleaning of the filter.

(3) Before installation, please flush the pipeline to prevent any debris such as hemp fibers, sand, and stones inside.

(4) Do not pull, rotate, or collide with the internal components of the pipeline during installation to avoid damaging the body.

(6) The ultrasonic heat meter is installed horizontally or vertically at the inlet of the pipeline, but when installed horizontally, the two transducers should be on the same horizontal plane. When installed vertically, the ultrasonic heat meter must be installed on a straight pipeline with upward water flow.

(7) When connecting the body to the pipeline, do not apply too much force to avoid damaging the sealing gasket and causing water leakage.

(8) The heat meter should be handled with care and not bumped during transportation; Storage in strong electromagnetic fields should be avoided.

DN40 caliber

DN80-300 caliber

Figure 1 Schematic diagram of overall installation of ultrasonic heat meter

Attention: During installation, install the temperature sensor connector labeled with the inlet probe in the ultrasonic waveform table.

2. Installation of temperature probe:

A. Installation method of DN40-65 caliber heat meter temperature probe:

Figure 2

(1) The size of the probe protection tube is shown in Figure 2

(3) After drilling the installation hole, place the probe protection tube in the corresponding position of the installation hole and weld it at the "welding point";

(4) After the welding is completed and the welding joint cools down, screw the outlet probe into the probe protection tube and screw it to the bottom;

Long L3

Inner diameter D1

Outer diameter D2

DN80～150

DN200～300

(2) Drill a hole vertically downwards at an appropriate position in the outlet pipeline (hole diameter 18mm);

(3) After drilling the installation hole, weld the base to the corresponding position of the installation hole;

(4) After the welding is completed and the welding joint cools down, cover the protective tube of the outlet probe with a sealed copper gasket, wrap the outer wire with adhesive tape, and screw it into the corresponding outlet pipe base, making sure to tighten it;

(5) Insert the probe into the bottom of the protective tube and secure it tightly with fixing screws.

Flange ￠ 210-8 × ￠ 19

Flange ￠ 240-8 × ￠ 22

Flange ￠ 295-12 × ￠ 22

Flange ￠ 355-12 × ￠ 26

Flange ￠ 410-12 × ￠ 26

Note: The width in the above table is the self width of the ultrasonic base surface, and the width of the finished surface may be about 20-30mm wider than the base surface due to assembly differences.

9、 Supporting supply

1. One ultrasonic heat meter