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LT-LDE series intelligent typeElectromagnetic FlowmeterAdopting the world's latest technology. By using constant current low-frequency ternary rectangular waves or dual frequency rectangular waves for excitation, it not only has the advantages of rectangular wave magnetic fields, but also overcomes the disadvantages of sine wave magnetic fields; It can also eliminate errors caused by fluctuations in power supply voltage, changes in power supply frequency, and changes in excitation coil impedance; And it has excellent zero stability and is not affected by fluid noise interference. Therefore, it has the characteristics of high stability and high reliability. The measurement principle of intelligent electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The intelligent electromagnetic flowmeter consists of a sensor and a converter. The sensor is installed on the measurement pipeline, and the converter can be combined with the sensor to form an integrated electromagnetic flowmeter. The converter is installed within 30 meters or 100 meters of the sensor, and is connected by a shielded cable to form a separated electromagnetic flowmeter. The main components of an intelligent electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core, and magnetic yoke housing. Intelligent electromagnetic flow meters are mainly used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Intelligent solutions such as water, sewage, mud, pulp, various acids, alkalis, salt solutions, food slurries, etcElectromagnetic FlowmeterWidely used in industries such as petroleum, chemical, metallurgical, textile, food, pharmaceutical, papermaking, as well as environmental protection, municipal management, water conservancy construction, etc.
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Product features:
1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
2. There are no obstructing flow components or pressure loss inside the measuring tube, and the requirements for straight pipe sections are relatively low;
3. Series nominal diameterDN15～DN3000There are multiple options for sensor lining and electrode materials;
4. The converter adopts a novel excitation method, with low power consumption, stable zero point, and high accuracy. The flow range can reach1500：1；
5. The converter can be integrated or separated from the sensor;
6. The converter adopts16A high-performance microprocessor,2x16LCDDisplay, convenient parameter setting, and reliable programming;
7. The flowmeter is a bidirectional measurement system equipped with three integrators: forward total, reverse total, and differential total; Can display. Zhuang, reverse flow, and have multiple outputs: current, pulse, digital communicationHART；
8. The converter adopts surface mounting technologySMTIt has self checking and self diagnostic functions;
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Main technical data:
Technical data of the whole machine and sensors
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Execution standards
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JB／T 9248~1999
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Nominal Diameter
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15、20、25、32、40、50、65、80、100、125、150、200、250、300、350、400、450、500、600、700、800、900、1000、1200、1400、1600、1800、2000、2200、2400、2600、2800、3000
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Maximum flow velocity
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15m／s
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accuracy
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DNl5～DN600
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Indicating value:±0.3%Flow rate≥1m／s；±3mm／svelocity of flow<1m／s
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DN700~DN3000
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Indicating value±0.5%Flow rate≥0.8m／S；±4mm／svelocity of flow<0.8m／S
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Fluid conductivity
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≥5uS／cm
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nominal pressure
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4.0MPa
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1.6MPa
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1.0MPa
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0.6MPa
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6.3、10MPa
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DNl5～DN150
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DNl5～DN600
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DN200～DN1000
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DN700～DN3000
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Special Orders
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ambient temperature
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sensor
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-25℃- +60℃
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Converter and integrated model
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-10℃- +60℃
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Lining material
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Polytetrafluoroethylene, chloroprene rubber, polyurethane, perfluoroethylene propyleneF46Add NetworkPFA
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Maximum fluid temperature
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All-In-One
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70℃
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separated
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Polychloroprene rubber lining
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80℃；120℃Please indicate when placing an order
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Polyurethane lining
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80℃
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PTFE lining
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100℃；150℃Please indicate when placing an order
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FEPF46
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screeningPFA
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Signal electrode and ground electrode materials
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stainless steel0Crl8Nil2M02TiHastelloy alloyCHastelloy alloyBTitanium, tantalum, platinum/iridium alloy, stainless steel coated with tungsten carbide
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Electrode scraper mechanism
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DN300—DN3000
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Connecting flange material
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carbon steel
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Grounding flange material
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stainless steel1Crl8Ni9Ti
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Imported protective flange materials
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DN65—DNl50
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stainless steel1Crl8Ni9Ti
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DN200～DNl600
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Carbon steel and stainless steel1Crl8Ni9Ti
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Shell protection
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DNl5～DN3000Separable rubber or polyurethane lined sensor
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IP65perhapsIP68
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Other sensors, integrated flow meters, and separate converters
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IP65
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Distance separation type
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The distance between the converter and the sensor is generally not more than100m
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Converter technology data
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power supply
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exchange
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85—265V，45—400Hz
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direct-current
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11—40V
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Operation keys and display
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Touch-tone
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4A thin film button can be used to set and select all parameters, and can also be utilizedPCmachineRS232Programming the converter settings;
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3goLCDWide viewing angle, wide temperature range, backlit display;
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auxiliary word for ordinal numbers1Display traffic values in rows;
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auxiliary word for ordinal numbers2Display flow units in rows;
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auxiliary word for ordinal numbers3Display the percentage of traffic, total forward, total reverse, total difference, alarm, and flow rate.
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Magnetic key type
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2A magnetic key is used to display parameter selection and reset, utilizingPCmachineRS232Programming the converter settings;
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2goLCDWide viewing angle, wide temperature range, backlit display:
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auxiliary word for ordinal numbers1go:Magnetic key selection:Display traffic percentage, forward total amount, reverse total amount, difference total amount, alarm, and flow rate.
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auxiliary word for ordinal numbers2Row: Display traffic.
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Internal integrator
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Positive total, negative total, and differential total.
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output signal
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Unidirectional analog output
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Fully isolated, load≤600D．20mATime;
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upper limit:0—21mAOptional, each levellmA；
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Lower limit:0—21mAOptional, each level1mA；
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Programming for forward and reverse flow output modes.
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Bidirectional analog output
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The lower limit is. perhaps4mA, other analog outputs in the same direction.
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Bidirectional pulse output
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Two outputs correspond to forward and reverse flow respectively,frequency0～800Hz,upper limit1~800Hzoptional,Each levelIHz；
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Square wave or selected pulse width, selected upper limit of pulse width2．5SEach level1ms；
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Passive isolation transistor switch output, capable of absorbing250mACurrent, withstand voltage35V.
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Dual channel alarm output
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Programmable alarm for high/low flow rate, air traffic control, fault status, positive/negative flow rate, analog over range, pulse over range, pulse small signal cutoff, with optional output polarity;
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Transistor switch output with isolation protection,absorbable250mAThe current,pressure resistance35V.Not isolated from pulse output
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digital communication
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RS232，RS485，HART
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Selection of lining
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Lining material
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Performance
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Maximum medium temperature
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scope of application
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—body type
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separated
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Polytetrafluoroethylene（F4
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It is the most chemically stable plastic, capable of withstanding boiling hydrochloric acid, sulfuric acid, nitric acid, and aqua regia, as well as concentrated alkali and various organic solvents. Not resistant to corrosion from chlorine trifluoride, high-temperature chlorine trifluoride, high flow rate liquid fluorine, liquid oxygen, and auto oxygen.
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70℃
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100℃ 150℃Special order required
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1Strong corrosive media such as concentrated acid and alkali. 2Sanitary media.
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Perfluoroethylene propylene（F46
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sameF4The wear resistance and negative pressure resistance are higher thanF4.
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ditto
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Polyfluoroethylene（Fs
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The upper limit of applicable temperature is lower than that of polytetrafluoroethylene, but the cost is also lower.
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80℃
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neoprene
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1Has excellent elasticity, high tensile strength, and good wear resistance.2Resistant to corrosion in general low concentration acid, alkali, and salt media, but not resistant to corrosion in oxidizing media.
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80℃ 120℃Special order required
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Water, sewage, and weakly abrasive slurry.
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polyurethane
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1Extremely strong wear resistance.
2Poor corrosion resistance.
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80℃
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Neutral strong abrasion slurry, coal slurry, mud
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Selection of imported protective flanges and grounding flanges or grounding rings
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Type of flange
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Scope of application
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Grounding flange or grounding ring
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Suitable for non-conductive pipelines such as plastic pipes, but sensors with grounding electrodes do not require them.
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Import protection flange
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Choose when the medium has strong wear resistance.
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Selection of electrodes
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Electrode material
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Corrosion resistance and wear resistance
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stainless steel0Crl8Nil2M02Ti
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Used for weakly corrosive media such as industrial water, domestic water, sewage, etc., suitable for industrial sectors such as petroleum, chemical, steel, as well as municipal and environmental protection fields.
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Hastelloy alloyB
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It has good corrosion resistance to all concentrations of hydrochloric acid below boiling point, as well as to non chlorinated acids, bases, and non oxidizing salt solutions such as sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids.
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Hastelloy alloyC
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Can withstand corrosion from non oxidizing acids such as nitric acid, mixed acids, or mixed media of chromic acid and sulfuric acid, as well as oxidative salts such as:Fe，'Cu'Corrosion caused by or containing other oxidants, such as hypochlorite solutions above room temperature and seawater corrosion
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titanium
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Capable of withstanding corrosion from seawater, various chlorides and hypochlorites, oxidizing acids including fuming sulfuric acid, organic acids, and alkalis. Not resistant to corrosion by relatively pure reducing acids such as sulfuric acid and hydrochloric acid, but if the acid contains oxidants such as nitric acidFc++CuWhen++, corrosion is greatly reduced.
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tantalum
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It has excellent corrosion resistance and is very similar to glass. Except for hydrofluoric acid, fuming sulfuric acid, and alkali, it can withstand almost all chemical media including boiling point hydrochloric acid, nitric acid, andl 50℃Corrosion caused by sulfuric acid. Dig in alkali; Corrosion resistance.
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Platinum/titanium alloy
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Can withstand almost all chemical media, but not suitable for aqua regia and ammonium salts.
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Stainless steel coated with tungsten carbide
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Used for non corrosive and highly abrasive media.
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Note: Due to the wide variety of media and the complex factors such as temperature, concentration, and flow rate that affect their corrosiveness, this table is for reference only. Users should make their own choices based on the actual situation, and if necessary, conduct corrosion resistance tests on the selected materials, such as hanging plate tests.
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Selection of LT-LDE series intelligent flowmeter instruments
◆ Range confirmation
General industrial intelligent typeElectromagnetic FlowmeterThe flow rate of the measured medium is2～4m/sIn special circumstances, the minimum flow velocity should not be less than0.2m/sThe highest should not exceed8m/sIf the medium contains solid particles, the commonly used flow rate should be less than3m/sTo prevent excessive friction between the lining and electrodes; For viscous fluids, the flow velocity can be selected to be greater than2m/sA higher flow rate helps to automatically eliminate the effect of viscous substances attached to the electrode, which is beneficial for improving measurement accuracy.
Within the rangeQUnder the determined conditions, the above flow rate can be usedVThe range determines the diameter of the flowmeterDThe size of is calculated by the following formula:
Q=πD2V/4
Q:Flow rate (㎡)/h）D:PIPE INNER DIAMETERV: Flow rate（m/h）
Range of intelligent flowmeterQIt should be greater than the expected maximum flow value, while the normal flow value should be slightly greater than the full-scale scale of the flow meter50It is appropriate.
LT-LDE series intelligent electromagnetic flowmeter reference flow range
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calibermm
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Flow rangem3/h
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calibermm
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Flow rangem3/h
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φ15
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0.06~6.36
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φ450
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57.23～5722.65
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φ20
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0.11～11.3
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φ500
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70.65～7065.00
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φ25
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0.18～17.66
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φ600
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101.74～10173.6
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φ40
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0.45～45.22
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φ700
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138.47～13847.4
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φ50
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0.71～70.65
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φ800
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180.86～18086.4
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φ65
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1.19～119.4
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φ900
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228.91～22890.6
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φ80
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1.81～180.86
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φ1000
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406.94～40694.4
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φ100
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2.83～282.60
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φ1200
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553.90～55389.6
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φ150
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6.36～635.85
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φ1600
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723.46～72345.6
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φ200
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11.3～1130.4
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φ1800
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915.62～91562.4
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φ250
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17.66～176.25.
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φ2000
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1130.4～113040.00
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φ300
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25.43～2543.40
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φ2200
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1367.78～136778.4
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φ350
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34.62～3461.85
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φ2400
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1627.78～162777.6
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φ400
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45.22～4521.6
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φ2600
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1910.38～191037.6
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Selection of LT-LDE series intelligent electromagnetic flowmeter
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model
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caliber
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LT
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15~2600
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code
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Installation form
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Y
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Integrated
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F
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split type
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code
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Converter model
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ZA
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rotundity
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ZB
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square
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code
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output signal
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I.4
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4~20mA
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f
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Frequency 1KHz
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Rs
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Serial communication (485)
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C
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control output
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code
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Explosion proof requirements
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N
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No explosion-proof
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EX
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Explosion proof (only applicable to split type)
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code
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medium temperature
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T1
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≤65℃
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T2
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≤65℃
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T3
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≤ 180 ℃ (only applicable to split type)
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code
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Lining material
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NE
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Chloroprene rubber (≤ 65 ℃)
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PTFE
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Polytetrafluoroethylene (≤ 189 ℃)
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PVC
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Polyvinyl chloride (≤ 70 ℃)
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code
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Electrode material
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316L
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stainless steel
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HC
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Hastelloy C
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HB
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Hastelloy B
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Ti
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titanium
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Ta
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tantalum
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