Electromagnetic heat meter

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ZW - LDR seriesElectromagnetic heat meterBy the calculation of heat flow measurement unit, unit and …

Products overview:

ZW - LDR seriesElectromagnetic heat meterBy the calculation of heat flow measurement unit, unit and precise matching of temperature sensor (PT1000).Electromagnetic heat meter measuring flow by using Faraday electromagnetic induction principle, combined with matching temperature sensor for temperature signal, it can calculate, accumulation, storage and display of heat transfer in the loop to absorb or release heat.Electromagnetic heat meter flow, energy cell CPU and sampling module adopts international advanced single chip microcomputer, large memory capacity of the equipment has high reliability, heat can truly achieve enthalpy calculation, high accuracy.Complete set of matching temperature sensor using platinum resistance Pt1000, its matching error is 0.1 ℃ or less.The accuracy of electromagnetic heat meter level to level 2.

Second, the working principle:

ZW - LDR series electromagnetic heat meter according to the flow sensor in the system of traffic signals and matching temperature sensors for temperature signal, and the water flow through the time to calculate and display the system by the release or absorb heat.KWh, according to the quantity of heat in the form of the cumulative units, the biggest show eight.

Mathematical model for calculation:

Type: - the release of heat, kJ.

M - through the heat energy in the table the quality of the heat transfer fluid, kg/s.

- heat transfer loop outlet temperature of the inlet temperature and the corresponding heat transfer fluid than the enthalpy difference, kJ/kg;

T - time, s

Applications:

ZW - LDR series electromagnetic heat meter is a kind of measuring heat transformation in the system of the heat released by the heat transfer fluid measurement instrument.It USES the high precision, high reliability, electromagnetic flowmeter for flow measurement, with high precision, high stability of the platinum thermal resistance temperature measurement, so that the heat table has very excellent performance measurement.Can be widely used in civilian residential quarters, office buildings and enterprises and institutions such as central heating, heating, air conditioning heat metering.

Four, the main features:

1, the domestic liquid crystal display various parameters, but also according to user requirements to provide on-site display instrument.

2, all CMOS micro power circuit design, low power consumption system.

3, a communication module, which can realize remote communication.

4, with functions of valve control, remote control valve switch, is advantageous for the property charge management.

5, measuring mechanism has no moving parts, then never wear and tear, the measuring accuracy is not affected by using cycle.

6, can with the pump or host linkage, without refrigeration or heating, stop measurement, avoid system when not in use, because of small pipe flow and small temperature difference energy metering errors.

7, the integral design, convenient installation, safe and reliable.

8, heating and cooling.

Five, the electromagnetic heat meter technical parameters:

Converter technology parameters:

1, power supply: AC 220 v (110 vac ~ 245 vac) and 24 VDC;

2, power consumption: 20 w or less (auxiliary power consumption);

3, precision level: level 1 or level 2 (matching accuracy);

4, protection grade: IP65;

5, environmental temperature: A class;

6, temperature resolution: 0.01 ℃;

7, optional temperature measurement range: - 30 ℃ ~ 180 ℃;

8, temperature measurement range: 1 ℃ ~ 90 ℃;

9, large flow zui readings (m3) : 9999999999 (10);

10, large heat zui readings (Mwh) : 9999999999 (10);

11 units, heat: kJ, MJ, GJ, KWH, Mwh optional;

12, analog output: 4 ~ 20 ma DC / 600 load resistance (which can be switch between heat and flow parameters).

13, pulse output: zui 5000 hz frequency, pulse width 0.1 ms - 999.9 ms (can switch between heat and flow parameters).

14, communication: RS - 485, M (RS - 232 - BUS, HART and other optional).

Sensor technology parameters:

1, the nominal diameter: (~ DN1400mm;

2, nominal pressure: 0.6 MPa ~ 4 MPa;

3, the lining material: high temperature resistant rubber, PTFE, PFA, F46;

4, electrode materials: molybdenum stainless steel, hartz alloy, hartz alloy C B, tantalum, titanium, platinum/and iridium;

5, structure form, shape, size,

6, medium temperature: - 30 ℃ ~ 180 ℃;

7, connection mode: flange.

Temperature sensor technology parameters:

1, sensor types: PT1000;

2, installation method: protect casing;

3, temperature measuring range: - 50 ℃ ~ 200 ℃;

4, conductor length: 0.6 m to 15 m.

Installation method:

1, the heating system should install a filter in the building.Before the heating system piping for cleaning, prevent the installation of pipeline into sundry intercepting heat meter.Sensor zui installed vertically (flow from bottom to top), in such a position, when the liquid flow, solids precipitation, and oil material rise, will adhere to the electrode.If mounted horizontally, must ensure that the pipe full of liquid, in order to avoid by air pockets and affect the measurement accuracy;

2, pipe diameter should be consistent with the sensor inner diameter, to avoid the phenomenon of throttling;

3, installation environment should be far away from the strong magnetic field equipment to prevent interference.(such as engine, transformer, radio transmitters, electrolytic cell or other cause electromagnetic interference places).

4, the electromagnetic heat meter can be installed in the inlet pipe can also be installed in the return pipe, convenient installation location should look-up table.Should not be less than 5 dn of straight pipe upstream of the sensor length, if have not fully open gate or upstream regulator, is connected to the gate valves and sensors of straight pipe length should be increased to 10 dn, downstream straight pipe length is generally not less than 3 dn can;

5, connection between the sensor and converter cable zui large length of 100;

6, the use of welding, the joint must be far away from the sensor, fight for sensor overheating or damage due to welding slag into lining;

7, the temperature sensor cable is 4 meters in length, the position of the return water temperature sensor and the position of the heat meter cannot exceed line length, such as more than can supply agreement;

Table 8, the electromagnetic heat grounding lines diameter should not less than 5.5 was, and as short as possible, and avoid and other equipment common grounding (recommend using a separate grounding).

Seven, matters needing attention.

1, the axis of the measuring electrode must be similar to horizontal direction;

2, measuring the pipe must be completely filled with liquid.

3, flow meter in front of the need to have 5 * D for flow meter diameter (D) the length of the straight pipe, the rear need have 3 * D for flow meter diameter (D) the length of the straight pipe;

4, the direction of fluid flow and the direction of arrow flowmeter;

Five should have can be damaged by vacuum meter, the pipe lining, special attention should be paid;

6, near the flow meter should be no strong electromagnetic field;

7, shall have plenty of space, near the flowmeter to installation and maintenance;

8, if measuring pipeline vibration, the flowmeter should be fixed on both sides of bearing when measuring the mixed liquid of different medium hybrid point and the distance between the flow meter at least 30 x D for flow meter diameter (D) the length of the cleaning and maintenance for the convenience of the flowmeter, should install bypass pipe.

Eight, converter technical data:

Nine, the choice of the lining:

Ten, reference flow range: inlet flange and grounding protection flange ring (or ground) options:

Eleven, selection of coding:

Twelve, design and ordering information:

1, products such as designated models to standard, please live in wei and control advisory prices, details!

2, if not specified product specifications, please put the working condition of requirements, design drawings, technical specifications, fax or email to us.

3, product orders for parameters: size (DN), nominal pressure (Mpa), temperature (℃), the heat range (KWH, Mwh).

4, offer confirmation: the company provide price list and technical standard specifications to customers to confirm, in the technical aspects to confirm before you draw up a contract.

5, quality requirements, quality standards, the supplier is responsible for the quality conditions: according to the relevant state quality standards.

After-sales service commitment:

1, our company sold by wei electromagnetic heat meter products appear quality problem, within twelve months for free maintenance.

2, the warranty period, any quality problems such as the products of our company, my company is responsible for free repair or replacement.

3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.

4, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, such as user need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.