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Multiparameter Coriolis mass flowmeter ElMetro-Flomac
Multiparameter Coriolis mass flowmeter ElMetro-Flomac (hereinafter simply referred to as “flowmeter” or “ElMetro-Flomac”) is an innovative measuring instrument based on DSP-technology and intended for direct measurement of mass flow, density and temperature of high-viscosity and aggressive liquids, gases, pulps, emulsions, suspensions and oils, as well as for calculation of volume flow, mass and volume, reduced density/volume flow, concentration and two-component mediums (water-cut function) in commercial and technological metering systems. General purpose industrial type and Ex-proved type are available.
Working principle of Coriolis flowmeters
Measurement principle of the device is based on an effect of Coriolis forces which influence medium flow that moves along a thin-wall measuring tube with bending vibrations under impressed frequency generated by drive coil when electric current of a certain frequency is passed through it. Coriolis forces, which could be applied to the both halves of a vibrating tube, slow down the first part of the flow and speed up the second. Phase difference between oscillations of two halves of the tube, which arises from this and which is proportional to mass flow, is recorded by inductive measurement sensors. Mass flow measurement results does not depend on density, viscosity, existence of solid particles and measured medium flow states. Detailed description of mass flow measurement principle for Coriolis flowmeter ElMetro-Flomac could be found in manual instruction.
Measuring tubes vibrations erase under common resonant frequency of the system. Functional dependence of resonant frequency on the medium density is calibrated during instrument production. In accordance to the calibration data stored in non-volatile memory, oscillation period measured during instrument operation is recalculated into density of process medium.
Temperature of measured medium is controlled by a temperature sensor – platinum sensitive element of Pt100 W=1.385 type which has a secure thermal contact with one of the tubes. Measured temperature is also used in calculation of reduced density and reduced flow.
Volume flow measurement principle is based on mathematic calculations from direct measurement of mass flow and density.
Calculation of two-component medium concentration is carried out on basis of calculated density of different components and measured density of their mixture. If mass and volume ratios of certain components and medium total flow are preset, flowmeter calculates flows of each component. Detailed description of two-component medium parameters calculation could be found in manual instruction.
Coriolis flowmeter structure
Flowmeter consists of primary transducer (hereinafter referred to as sensor (S)) and electronic transmitter (ET).
Sensor (different types of sensors are listed in the Pic.1) is installed right at a pipeline and transduces process parameters into electrical signals which are transferred to the electronic transmitter (ET). After electronic transmitter (ET) completes signal processing from the sensor (S), it outputs the result in a built-in display (rendering of measurement results could be provided in a graphic OLED or LCD at the choice of a customer), provides flow totalization (totalizer function) and sets up following output signals: frequency, pulse, discrete, current (4…20 mA) and digital. Digital interfaces vary according to the type of electronic transmitter (ET). Furthermore, electronic transmitter (ET) processes control signals which are transferred to discrete inputs and provides connection to external master-devices via RS-485 and HART digital interfaces. Electronic transmitter (ET) can also collect data from the measured medium pressure gauge via HART protocol.
Components of electronic transmitter (ET) could be variously combined in terms of design or performed by separate modules (view Pic.2 – Types of ElMetro-Flomac electronic transmitters). One of the modules could be represented by a videographic recorder ElMetro-ViER. Modules are connected by specific wires which are provided in a supply package of the flowmeter. Possible combinations of electronic transmitter are listed in manual instruction.
Technical characteristics of Coriolis flowmeter
Coriolis flowmeters ElMetro-Flomac are intended for direct measurement of mass flow, density and temperature of liquids, gases, pulps, water-oil emulsions, oils, suspensions, gas condensate, as well as solutes, liquefied gases, compressed gases, food liquors and etc. Whereby viscosity and density of measured medium does not influence measurement results.
- Dimensions range, mm: Table 1 - Dimensions range and flow ranges of liquids – includes nominal values of liquid mass flow, coefficient (kG) and limits of zero point stability for the flowmeter sensor.
Dn, mm Liquid nominal mass flow (QMnom(F)*), t/h Liquid nominal mass flow (QMmax(F)*), t/h Coefficient KG, kg/m3 Zero point stability (Z), ±t/h Table 1. Dimensions range and flow ranges of liquids 3 0.1 0.16 40 0,000010 5 0.25 0.4 40 0,000025 10 1.5 2 60 0,00015 15 3 4.5 80 0,00030 25 12 17 90 0,00120 32 21 30 90 0,00210 50 60 70 90 0,0060 80 150 210 155 0,015 100 240 350 130 0,024 150 450 540 200 0,045 Notes to Table 1: * nominal flow rate corresponds to differential pressure of the flowmeter which is equal to 0.1 MPa if water flow is measured under 20 °С temperature.
Maximum mass flow rate of gas is defined by QMmax(G) value:
QMmax(G) = QMmax(F)·ρG / kG (1)
where ρG – density of gas under working conditions, kg/m3.
In case calculated QMmax(G) value is more than QMmax(F) from Table 1, then QMmax(F) from Table 1 is considered as maximum flow rate of gas for the selected diameter.
- Flowmeters divides into several types according to their accuracy (δ0): 0.1; 0.15; 0.2 and 0.5.
Permissible limits of main relative error for measuring mass flow (δQM(F)) and liquid mass (δM(F)) via display, pulse-frequency and digital output signals:
- ± δ0 (%) if QM(F) ≥ QT(F);
- ±100%·Z/QM(F) if QM(F)<QT(F);
where QT(F) is a transitional flow of liquid (view Table 2) calculated according to the formula no. 2:
QT(F) = 100%·Z/δ0 (2)
Permissible limits of main relative error for measuring mass flow (δQM(G)) and gas mass (δM(G)) via display, pulse-frequency and digital output signals:
- ±δG (%) if QM(G) ≥ QT(G);
- ±100%·Z/QM(G) if QM(G) < QT(G);
where QT(G) is a transitional flow of gas (view Table 2) calculated according to the formula no. 3:
QT(G) = 100%·Z/δG (3)
Accuracy δG is equal to:
- 0.35% - for accurary rate δ0 = 0.1% and 0.15% (from Dn3 to Dn32 mm);
- 0.5% - for accurary rate δ0 = 0.1% and 0,15% (from Dn50 to Dn150 mm);
- 0.5% - for accurary rate δ0 = 0.2% (from Dn3 to Dn150 mm);
- 0.75% - for accurary rate δ0 = 0.5% (from Dn3 to Dn150 mm).
Dn, mm Qnom(F), t/h Transitional flow of liquid (QT(F)), t/h Transitional flow of gas (QT(G)), t/h Table 2. Dimensions range and trnsitional flows of liquid and gas δ0 / δG 0.1 0.15 0.2 0.5 0.35 0.5 0.75 3 0.1 0.01 0.007 0.005 0.002 0.003 0.002 0.001 5 0.25 0.025 0.017 0.0125 0.005 0.007 0.005 0.03 10 1.5 0.15 0.1 0.075 0.03 0.043 0.03 0.02 15 3 0.3 0.2 0.15 0.06 0.086 0.06 0.04 25 12 1.2 0.8 0.6 0.24 0.34 0.24 0.16 32 21 2.1 1.4 1.05 0.42 0.6 0.42 0.28 50 60 6 4 3 1.2 1.7 1.2 0.8 80 150 15 10 7.5 3 4.3 3 2 100 240 - - 12 4.8 - 4.8 3.2 150 450 - - - 9 - 9 6 - Density measurement range: from 1 to 2000 kg/m3.
Permissible limits of absolute error for measuring liquid density (∆ρ) via display, pulse-frequency and digital output signals are:
- ±1 kg/m3 – for accuracy rate 0.1;
- ±2 kg/m3 – for accuracy rate 0.15; 0.2; 0.5;
- ±0.3 kg/m3 – for accuracy rate 0.1 or 0.15, after density is calibrated under working conditions (calibration procedure is described in manual instruction).
Permissible limits of main relative error for measuring volume flow (δQV) and liquid volume (δV) via display, pulse-frequency and digital output signals are:
- for accuracy rate 0,1: δQV = δV = 0,15%;
- for other accuracy rates is calculated according to the formulas no.4 and 5:
where, ρ is density of measured medium, kg/m3.
- Temperature range of measured medium: from -60 to +250 °С. A special type of flowmeter for measuring mediums with temperatures between -60 and +350 °С is available.
Permissible limits of absolute error for measuring temperature (∆T) of the medium are defined according to the formula no.6:
∆T = ±(0,9+0,008·|t|), °С (6)
where t is temperature of the measured medium, °С.
- Flowmeter is equipped with following output signals:
- pulse/frequency/status (passive, 30 V, 50 mA) - 1 channel;
- frequency / status (passive, 30 V, 50 mA) - 1 channel;
- status (passive, 30 V, 50 mA) - 1 channel;
- analog current 4-20 mA (passive) + HART (v.5/v.7) - 1 channel;
- digital RS-485, Modbus RTU protocol (with selection of Modbus registers map) - 1 channel.
- Flowmeter is equipped with following input signals:
- universal discrete (Log. «0»: ≤ 5 V; Log. «1»: ≥ 5 V; ) - 2 channels. Channels could be used to control totalizers.
- Depending on the flowmeter structural type it may have local user interface which includes LCD and graphic OLED, as well as capacitive keys to configurate the flowmeter in explosion hazardous areas without removing the cover. Flowmeter could be configurated by means of PC software supplied with the flowmeter. Display could be rotated by ±90 degrees. Image rotation by 180 degrees is available via software. Information could be output in the display in the Russian and English languages.
- If required the flowmeter could be equipped with cable inputs of different Ex-proof and connection type.
- If required the flowmeter could be equipped with cables of different Ex-proof types and kinds.
- Ambient temperature. Flowmeters with graphic OLED are resistant to the impact of ambient temperatures between -40 to +60 ºC. Flowmeters with LCD are resistant to the impact of ambient temperatures between -20 to +60 ºC.
- Flowmeters with thermowell are resistant to the impact of ambient temperatures between -60 to +70 ºC. Under ambient temperature -60 °С temperature inside thermowell remains at the level of (15 ± 3) °С above zero.
- Materials of flowmeter components which contact the measured medium are listed in the Table 3 - Materials of flowmeter components which contact the measured medium. Flowmeter components could be made of other materials if agreed with the manufacturer.
Type code Table 3. Materials of flowmeter components which contact the measured medium Components Z C Y Measuring tubes Flanges Steel 20 Steel 09Г2С Steel 12Х18Н10Т Cone adapters Elastic gasket (for flanges sealing) Paronit ПОН-Б (as default)
ПМБ, ПМБ-1, ПОН, ПОН-А (to be agreed)
Oval gasket (for flanges sealing) 08КП 08Х13 08Х18Н10 - Temperature range of measured medium:
- code “U” of sensor temperature range: from -60 to +100 ºС;
- code “S” of sensor temperature range: from -60 to +150 ºС;
- code “T” of sensor temperature range: from -60 to +250 ºС;
- customized code, to be confirmed by manufacturer: from -60 to +350 ºС.
Permissible temperature range of the measured medium depends on flowmeter structural type, view Table 4 - Structural types and temperatures.
Structural type of flowmeter Code of flowmeter temperature range Table 4. Structural types and temperatures Integral ("I" code) U Splitted("S" code) U / S / T Remote ("R" code) U / S Remote-splitted ("RS" code) U / S / T Compact ("C" code) U / S Compact with recorder ElMetro-ViER ("V" code) U / S Note: additional error of mass flow and mass measurement, caused by change in temperature of measured medium and ambient from the temperature of the flowmeter calibration, does not exceed ± 0.015 % of the flow nominal value per each 10 °С.
Table 6. Dimensions range and structural types Dn, mm I S R RS C V 3 - + + + + + 5 - + + + + + 10 - + + + + + 15 - + + + + + 25 + + + + + + 32 + + + + + + 50 + + + + + + 80 + + + + + + 100 + + + + + + 150 + + + + + + In dependence on the flowmeter structural type its parts could be structurally combined (“I” and “C” codes) or connected by cables (“S”, “R”, “RS” and “V” codes). Measurement module of “S”, “R” and “RS” types has several mounting options in accordance to Pic. 9 – Mounting of measurement module.
- Integral type (“I” code). In integral type electronic unit (EU), which consists of a processor (PM) and measurement (MM) modules, is mounted on a sensor body. Such type of the flowmeter is a one-piece construction, view Pic.3. Integral type of flowmeter. PM and MM are connected by a cable which could be placed in a metal hose to protect them from mechanical impacts. Cable is already connected to PM when supplied with the flowmeter. Connection guidance could be found in manual instruction. Integral type is the most compact of all models with display, keyboard and full range of output signals. However, present type is available not for all nominal diameters (view Table 6 – Dimensions range and combinations) and does not allow to operate with high-temperature mediums (view Table 4 – Structural types and temperatures).
- Splitted type (“S” code). In splitted type measurement (MM) and processor (PM) modules are assembled in one housing (ET) and are located separately from sensor at the distance up to 30 meters (view Pic.4 – Splitted type of flowmeter). Sensor is connected to electronic transmitter by a specific cable which is supplied together with the flowmeter. Cable specification as well as guidance on the flowmeter installation and cable connecting could be found in manual instruction. Present type enables to measure parameters of high-temperature mediums, since electronic transmitter is splitted from the sensor.
- Remote type (“R” code). In remote type MM is mounted on a sensor body. PM is placed separately and is connected to MM by a 4-wire cable of maximum length up to 100 meters (view Pic.5 – Remote type of flowmeter). From PM side cable is inserted into a terminal block. Commonly the cable is provided in a supply package of the flowmeter. Armorded cable and cables with of improved isolation properties are available for order. Detailed description could be found in manual instruction. Note that there are some restriction on the measured medium temperature (view Table 4).
- Remote-splitted (“RS” code). In remote-splitted type (view Pic. 6 – Remote-splitted type) all parts of flowmeter are located separately. MM is connected to the sensor by a specific cable with is provided in a supply package of the flowmeter. Cable maximum length is 30 meters. Cable specification could be found in manual instruction. PM is connected to MM by a 4-wire cable which is provided in a standard supply package of the flowmeter. Cable maximum length is 100 meters. Armorded cable and cables with of improved isolation properties are available for order, view manual instruction. Present type allows operating with high-temperature mediums and at the same time to install PM with display and a keyboard in a place which is more convenient for setup and control (at the distance up to 130 meters).
- Compact type (“C” code). Electronic transmitter in present type is not divided into a measurement and processor modules (view Pic. 7 – Compact type of flowmeter). ET is placed in a housing which is mounted on the sensor without display or keyboard. Present type has the smallest dimensions of all.
- Compact type with videographic recorder ElMetro-ViER (“V” code). Present type (view Pic.8 – Compact type with videographic recorder ElMetro-ViER) differs from the common compact type by a videographic recorder ElMetro-ViER-M7 which serves for measurement data backup and display, as well as for setup of the flowmeter output signals and etc. Input circuits of secondary equipment are to be connected to output circuits of the recorder. Present type enables to remote recorder (with display and connecting terminals for the flowmeter output signals) at the distance up to 500 meters from the sensor.
- Excess pressure of measured medium is not more than: 4.0 MPa; 10.0 MPa; 16.0 MPa; 25.0 MPa with process connection according GOST, ANSI, DIN and other standards if agreed with the manufacturer.
- Flowmeter is equipped with function which enables to compensate measured medium pressure impact to flow and density measurement results when pressure value is captured via HART protocol. Detailed description of the function could be found in manual instruction.
- Flowmeter measures parameters both of direct and reverse flows.
- Flowmeter is equipped with function which enables to detect air slugs, detailed description of the function could be found in manual instruction.
- Flowmeter provides opportunity to select register maps (function is designed to replace import flowmeters).
- Flowmeter is equipped with flow and density cut-off function. Present function is intended for protection from incorrect flow measurement at hydraulic impacts and undesirable short-term fluctuation of the flow.
- Flowmeter is run under two modes of power supply. Power supply modes are listed in Table 5.
Power supply voltage, V Table 5. Power supply modes Power supply options Voltage lower limit Voltage upper limit AC 80 264 DC 20 140 - Built-in power supply unit provides automatic switch between above mentioned power supply modes. Flowmeters power consumption does not exceed 12 V·A.
- Under temperature (20±5) ºС and relative humidity 30-80% electrical isolation between electric power circuits of the electronic transmitter on one side and housing, all other input and output circuits of processor module or electronic transmitter in whole (for “S” structural type) on the other hand, undertakes 1500 V AC voltage (rms value) with frequency between 50 and 60 Hz within 1 minute.
- Under temperature (20±5) ºС and relative humidity 30-80% electrical isolation between independent electric circuits of the electronic transmitter (except for power circuits) as well as between these circuits and housing undertakes 500 V AC voltage (rms value) with frequency between 50 and 60 Hz within 1 minute.
- Electrical resistance between independent electric circuits of the electronic transmitter as well as between these circuits and housing is not less than:
- under normal ambient conditions: 40 MOhm;
- under upper temperature limit (+ 60 ºС): 10 MOhm;
- under increased humidity (95%): 5 MOhm.
- Environmental protection of the flowmeter (from dust and water) corresponds to GOST 14254:
- IP67: for sensor;
- IP65: for electronic transmitter.
- Verification interval: 4 years.
- Reliability of operation under conditions and modes specified in technical specifications is determined by following characteristics:
- Mean time between failures: not less than 60000 h;
- Mean recovery time: not more than 8 h;
- Average life-time: not less than 12 years.
- Flowmeters in transportation packing are resistant to the impact of F3 class vibrations in accordance to GOST R 52931-2008.
- Flowmeters in transportation packing are resistant to temperatures in the range between -50 (for structural types without a display or with OLED) or -30 (for types with LCD) and +70 ºС.
- Flowmeters in transportation packing are resistant to relative air humidity up to 95% under temperature +35 ºС.
- Ex-proof provision:
Sensor (S) is equipped with intrinsically safe electric circuit Ex-proof of “ia” type in accordance to GOST R 30852.10. Ex-proof marking of the sensor (S) is defined by its temperature range:
- "U" code - 0ExiaIIBT4X;
- "S" code - 0ExiaIIBT3X;
- "T" code - 0ExiaIIBT1X.
Measurement module (MM) is equipped with explosion-proof enclosure in accordance to GOST R 30852.1 and intrinsically safe electric output circuit of “ia” type in accordance to GOST R 30852.10. Ex-proof marking of the measurement module (MM) is:
- 1Exd[ia]IIBT6X.
Processor module (PM) is equipped with explosion-proof enclosure in accordance to GOST R 30852.1. Ex-proof marking of the processor module (MM) is:
- 1ExdIIBT6X.
Weight:
- Weight of sensor (S) does not exceed values listed in Table 7 - Sensors weight.
- Weight of measurement module (MM) does not exceed 1.5 kg.
- Weight of processor module (PM) does not exceed 5 kg.
Dn, mm Sensor maximum weight, kg Table 7. Sensors weight 3 8 5 8 10 10 15 13 25 17 32 23 50 42 80 65 100 100 150 350 Supply package:
Standard supply package of Coriolis flowmeter ElMetro-Flomac includes: flowmeter (1 pc.), product certificate (1 pc.), manual instruction (1 pc.), calibration procedure description (1 pc.), connection kit (1 set), CD with software and other information (1 pc.), package (1 pc.). At request of the customer standard supply package may include a set of additional cables and cable inputs in accordance to order code (view Appendix А of manual instruction).
Additional supply package may include: videographic recorder ElMetro-ViER, I/O module ElMetro-IOM, power supply unit ElMetro-IPT, HART/RS485-USB modem ElMetro-808М, interface converter USB/RS-485 and etc.
- Coriolis flowmeter must be installed at a pipeline strictly according to the guidance described in manual instruction.
- Overall and connection dimensions of Coriolis flowmeter could be found in Appendixes A and B of manual instruction.
- Guidance on the flowmeter to external devices connection could be found in Appendix C of manual instruction.
- Warranty period is 12 months from the date of setting into operation, but not more than 18 months from the date when flowmeter is shipped out from the manufacturer factory.
Application of Coriolis flowmeter ElMetro-Flomac:
Coriolis flowmeters field of application: automatic technological process control system (ATPCS), systems of oil charge/discharge, dispensing reagents and hygienic liquids, filling in tanks, oil extraction and transportation, automated group metering station (AGMS), calibration stands, food mixing systems, combustible mixtures supply control systems at electric power installations, automated fuel gas metering systems, automobile CNG filling stations, gas condensate conversion units, systems for continuous environmental monitoring of outgoing gases, including associated petroleum gas, complex gas treatment plants (CGTP), calibration stands and etc.
Main industries: oil and gas, chemical, energy, machine-building, metallurgy, pulp and paper, food industries and etc.
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To make enquiry and get a commercial offer on Coriolis flowmeters ElMetro-Flomac of the Russian manufacturer ElMetro company, please, send us product order code (view codes description in manual instruction) to e-mail: info@elmetro.ru or contact us via tel.: +7 (351) 220-06-01. To discuss technical questions, please, refer to technical support tel.: +7 (351) 220-06-03.