LDR Electromagnetic Thermal Energy Meter

Ⅰ. Product Features
■ Measure Cooling and Heating: The converter is directly equipped with cooling and heating measurement function, comes with 2 standard Pt 1000 sensors, and does not require an additional cooling and heating metering instrument. This facilitates installation and can reduce procurement and installation costs.
■ High Reliability: Exceeds national standards GB/T17616, GB/2423, GB/T16499 with rigorous EMC, safety regulations, and high/low temperature testing.
■ Fast Response: Utilizes a 32-bit MCU, 24-bit ADC, and optimized filtering algorithms for rapid response. Accurate and stable measurement data ensures suitability for monitoring and control during equipment matching.
■ Grounding Electrode: NONCON patented technology ensures measurement balance at the cross-section, eliminating measurement errors caused by poor grounding, thereby maintaining long-term measurement accuracy. No additional grounding loop is required, reducing material and installation costs.
■ Split-Type IP68 Technology: A highly detailed IP68 design technique featuring imported IP68 sealing gaskets, IP68 cables, and multiple IP68 sealing designs to prevent condensation on the split-type IP68 sensor from affecting its operation.
■ High Signal-to-Noise Ratio: The sensor utilizes high signal-to-noise ratio technology, while the converter employs low-noise, high-precision components and design techniques, which are more conducive to measuring the smallest flow rates.
Low-power design: Optimized excitation circuit design, power consumption reduced by over 3 times compared to conventional electromagnetic flowmeters, offering energy-saving effects when widely applied.
■English Translation: Features a Chinese display LCD screen for easy understanding and operation.
Optimized Power Technology: Utilizes an optimized power design, offering mature and reliable technology, high conversion efficiency, and guaranteed long-term reliability.
■Rapid Wiring: Utilizing internationally branded terminal blocks, wiring is quick, convenient, and reliable, ensuring long-term measurement stability and dependability.
■ Output Signal: Standard with RS-485, (4-20) mA, Frequency/Pulse, fast output response; equipped with surge protection measures.
II. Working Principle
Hot water (cold water) supplied by a heat source enters the heat exchange system (radiator, heat exchanger, or a complex system composed of them) at a higher (lower) temperature and exits at a lower (higher) temperature. During this process, heat is released or absorbed from/to the user through heat exchange (Note: This process includes the energy exchange in heating and cooling systems).
As water flows through the heat exchange system, the calculator computes and displays the heat released or absorbed by the system based on the flow rate provided by the flow sensor, the supply and return water temperatures from the matching temperature sensor, and the duration of the water flow.


Q: Heat released or absorbed by the system, J or kWh;
qm: Mass flow rate of water through the heat meter, kg/h
Flow Rate of Water Through Heat Meter, m³/h
p: Density of water passing through the heat meter, kg/m³;
△h: Enthalpy difference of water at the inlet and outlet temperatures of the heat exchange system, J/kg
t: Time, h;


III. Product Categories

1. Integrated electromagnetic thermal energy meter
   
   

IV. Instrument Selection

(1) Selection Code

V. Selection Considerations
Flow Rate Range in Flow Measurement
When testing clean media, the economic flow rate is 1.5~3 m/s; for crystallizing solutions, the flow rate should be appropriately increased to 3~4 m/s, which serves to self-clean and prevent adhesion and deposition. In actual applications, rates rarely exceed 7 m/s, and those over 10 m/s are even rarer.

High-temperature type
When the fluid temperature is between (60~160)°C, it is mandatory to use a high-temperature lining. Rubber linings are not suitable for fluids with temperatures above 60°C.
Instrument structure
When the instrument is installed below ground level, a split-type must be chosen, with an IP68 structure. If the instrument inevitably needs to be installed at the pump's outlet, please select an instrument with a split-type structure.
VI. Product Dimension Diagram
Integrated size diagram as: (Figure 2) and the following table

2. Disassembled size diagram as: (Figure 3) and the following table


Disassembled外形尺寸数据 as shown in the diagram below:

VII. Installation Requirements
1. The pipeline must be cleaned before installing the heat meter.
2. The calorimeter is a precision instrument; it must be handled with care during installation. Do not pull or tug on the meter head or sensor wires; do not compress the temperature sensors to prevent damage to the instrument.
3. The arrow on the sensor housing indicates the direction of water flow; theoretically, it should not be installed upside down.
4. The front end of the heat meter pipeline must be equipped with a filter of the corresponding size.
5. When installing flow sensors for heat meters, ensure there is a straight section of pipe with a length of at least 10 times the pipe diameter upstream of the heat meter, and at least 5 times the pipe diameter downstream.
6. Both ends of the heat meter must be fitted with valves of the appropriate size, which can be disconnected from the heat meter for cleaning and maintenance during its operation.