Central air conditioning electromagnetic heating and cooling meter energy meter energy meter cooling and heating meter

Central air conditioning electromagnetic heating and cooling meter energy meter energy meter cooling and heating meter

For electromagnetic flow meters, selecting suitable electrodes and liners is particularly important, as it is a prerequisite for ensuring the normal use of electromagnetic flow meters

The selection of electrode and grounding ring materials should be based on the corrosiveness of the measured fluid. Please refer to the relevant corrosiveness manual. For special fluids, experiments should be conducted

I. Overview

Central air conditioning electromagnetic heating and cooling meter energy meter energy meter cooling and heating meter

The measurement principle is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a non-magnetic alloy short tube lined with insulating material. Two electrodes are fixed on the measuring tube through the tube wall in the direction of the diameter of the tube. The electrode tip is basically flush with the inner surface of the lining. When the excitation coil is excited by bidirectional square wave pulses, a magnetic flux density of will be generated in the direction perpendicular to the axis of the measuring tubeBThe working magnetic field. At this point, if a fluid with a certain conductivity flows through the measuring tube, it will cut the magnetic field lines and induce an electromotive forceE. Electromotive forceEProportional to the magnetic flux densityBMeasure the inner diameter of the tubedCompared to the average flow velocityvThe product of. electromotive forceEThe flow signal is detected by electrodes and sent to the converter through cables. After amplifying and processing the flow signal, the converter can display the fluid flow rate and output signals such as pulses and analog currents for flow control and regulation.

2、 Characteristics of intelligent electromagnetic flowmeter products

There are no movable parts or flow blocking components inside the pipeline, and there is almost no additional pressure loss during measurement.

The measurement results are related to physical parameters such as flow velocity distribution, fluid pressure, temperature, density, viscosity, etc.

On site, the range can be modified online according to the actual needs of the user.

High definition backlightLCDDisplay, fully Chinese menu operation, easy to use, simple to operate, easy to learn and understand.

adoptSMDDevices and surface mount（SMT）Technology and circuit reliability are high.

adopt 16 The embedded microprocessor has fast processing speed, high accuracy, programmable low-frequency rectangular wave excitation, improved stability of flow measurement, and low power consumption.

All digital processing, strong anti-interference ability, reliable measurement, high accuracy, and a flow measurement range of up to 150 ： 1 Ultra lowEMISwitching power supply, suitable for a wide range of power supply voltage changes, resistant toEMIGood performance.

There are three integrators inside that can display the forward cumulative amount and the difference cumulative amount respectively. There is also a non power down clock inside that can record 16 The second power outage time. Optional configuration

haveRS485TheRS232TheHartandModbusWaiting for digital communication signal output. Optional configuration

It has self checking and self judging functions.

Infrared handheld operator,115KHZCommunication speed, all functions of the remote non-contact operation converter. Optional configuration

The hourly total recording function records the total flow in hours and is suitable for time-based measurement. Optional configuration

Rated working pressure of intelligent electromagnetic flowmeter: Pipeline type:DN6～DN80 ≤ 1.6Mpa, DN100～DN250 ≤ 1.0Mpa,

DN300～DN1200 ≤ 0.6Mpa.

Intelligent electromagnetic flowmeter flow measurement range: The flow measurement range corresponds to the flow velocity range 0.1 ～15m/s

Conductivity range: measured fluid conductivity≥ 5us/cm(integrated)Most media composed of water have a conductivity of 200 ～800 μ s/cmWithin the range, electromagnetic flow meters can be used to measure its flow rate.

Current output: 0 ～10mAWhen, the load resistance is 0 ～1.5k Ω； 4 ～20mAWhen, the load resistance is 0 ～750k Ω

Digital frequency output: The upper limit of the output frequency can be within 1 ～5000HzInternally set with photoelectric isolation transistor collector open circuit bidirectional output. external power supply≤ 35VThe maximum collector current during conduction is250mA.

Power supply for intelligent electromagnetic flowmeter: 85 ～265V， 45 ～63Hz.

Length of straight pipe section: Pipeline type: upstream≥ 5DN, downstream≥ 2DN.

Connection method: Flange connection is used between the flowmeter and the piping, and the flange connection size should comply withGB11988The regulations.